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riffeljl(at)gmail.com
Guest
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 Posted: Sat Dec 06, 2008 6:34 am Post subject: IO-360 -b Series Power Chart - FOUND |
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|
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY
what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A,
- B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - *55%* Rated Fuel Flow *45 Lb/H*r RPM & MAP
117 HP - *65%* Rated Fuel Flow *50 Lb/Hr *RPM & MAP
135 HP-*75%*Rated Fuel Flow *60 Lb/Hr *RPM & MAP
*2100*
*2200*
*2300*
*2400*
*2100*
*2200*
*2300*
*2400*
*2200*
*2300*
*2400*
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg
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tracy(at)rotaryaviation.c
Guest
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| Posted: Sat Dec 06, 2008 7:55 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
Thanks! Very interesting. Altitude looks like it has more effect on MP requirement than I thought. Must be the exhaust back pressure reduction at altitude as someone else pointed out. I had not factored that in and was only compensating for pumping losses.
Was also gratified that laws of physics still hold and there is no free lunch. It still takes a fixed amount of fuel to make a given amount of HP. Guess that's why the commercial pilots use fuel flow, which is the method I've been using. The change in MP requirement is hard to measure when using a fixed pitch prop when RPM is not directly controllable. Fuel flow takes all the math out of the calculation.
Also shows why it makes sense to fly at less than 75% power. Only took 5 lb/hr to get 10% more HP between 55 & 65% but double that to get the next 10% HP. Gets even worse above that.
Tracy Crook
On Sat, Dec 6, 2008 at 9:33 AM, J Riffel <riffeljl(at)gmail.com (riffeljl(at)gmail.com)> wrote:
[quote]
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - 55% Rated Fuel Flow 45 Lb/Hr RPM & MAP
117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP
135 HP-75%Rated Fuel Flow 60 Lb/Hr RPM & MAP
2100
2200
2300
2400
2100
2200
2300
2400
2200
2300
2400
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg. For each 10F variation in carburetor air temperature from standard altitude temperature. Add manifold pressure for air temperatures above standard; subtract for temperatures below standard | Quote: |
_blank">http://www.matronics.com/contribution
t="_blank">http://www.matronics.com/Navigator?RV-List
tp://forums.matronics.com
|
[b]
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http://www.matronics.com/Navigator?RV-List |
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ceengland(at)bellsouth.ne
Guest
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| Posted: Sat Dec 06, 2008 9:43 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
The chart also appears to have some inaccuracies & is incomplete. The
inaccuracies seem obvious if you look down each rpm column. How can the
engine produce the same power at a fixed rpm but with as much as an 8.2
inch variation in MP? (Unless you're assuming that you aren't leaning &
you're wasting fuel at the lower MP's.)
It's incomplete because the engine will produce 75% at around 7k-8k feet
altitude but it takes 2700 rpm to get 75% at that altitude. That number
is in official Lyc charts. I've got one lying around somewhere but it's
a really bad photocopy from a Lyc book & wouldn't be visible if I copied
it again.
The number that can be calculated from Lyc power/fuel burn charts that's
consistent with the top section of this chart is the calculated ~0.45 lb
per hp per hour number at 75%. A 180 hp Lyc burns very close to 10 gph
at 75%: 60 lb per hr/(6 lb per gal)=10 gal per hr. 60 lb per hr at 135
hp is very close to 0.45 lb per hp per hr.
Charlie
Tracy Crook wrote:
| Quote: | Thanks! Very interesting. Altitude looks like it has more effect on
MP requirement than I thought. Must be the exhaust back pressure
reduction at altitude as someone else pointed out. I had not factored
that in and was only compensating for pumping losses.
Was also gratified that laws of physics still hold and there is no
free lunch. It still takes a fixed amount of fuel to make a given
amount of HP. Guess that's why the commercial pilots use fuel flow,
which is the method I've been using. The change in MP requirement is
hard to measure when using a fixed pitch prop when RPM is not
directly controllable. Fuel flow takes all the math out of the
calculation.
Also shows why it makes sense to fly at less than 75% power. Only
took 5 lb/hr to get 10% more HP between 55 & 65% but double that to
get the next 10% HP. Gets even worse above that.
Tracy Crook
On Sat, Dec 6, 2008 at 9:33 AM, J Riffel <riffeljl(at)gmail.com
<mailto:riffeljl(at)gmail.com>> wrote:
A kind sole at Lycoming saw the RV post and sent this - which is
EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E,
-E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - *55%* Rated Fuel Flow *45 Lb/H*r RPM & MAP
117 HP - *65%* Rated Fuel Flow *50 Lb/Hr *RPM & MAP
135 HP-*75%*Rated Fuel Flow *60 Lb/Hr *RPM & MAP
*2100*
*2200*
*2300*
*2400*
*2100*
*2200*
*2300*
*2400*
*2200*
*2300*
*2400*
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure
approximately 0.17"hg. For each 10F variation in carburetor air
temperature from standard altitude temperature. Add manifold
pressure for air temperatures above standard; subtract for
temperatures below standard
|
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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tracy(at)rotaryaviation.c
Guest
|
| Posted: Sat Dec 06, 2008 10:20 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
Might be a formatting issue when emailing charts. I only see about a 2" max variation in MP with altitude when looking at the chart.
And now that I look closely, the temperature is also factored in (lower temp at higher altitude). I was thinking in terms of constant temperature. With that in mind, I go back to my original premise that altitude alone has almost no effect on MP for a given RPM and HP. Looks like it's almost all temperature and pumping loss related.
This is all very interesting and important to me when doing engine development but, would anyone actually use such a chart and the associated formulas when flying? Not if you are on the main mission of the RV pilot ( Fun ).
If this is that important to you, it's well worth installing a fuel flow instrument.
Tracy Crook
On Sat, Dec 6, 2008 at 12:41 PM, Charlie England <ceengland(at)bellsouth.net (ceengland(at)bellsouth.net)> wrote:
[quote]--> RV-List message posted by: Charlie England <ceengland(at)bellsouth.net (ceengland(at)bellsouth.net)>
The chart also appears to have some inaccuracies & is incomplete. The inaccuracies seem obvious if you look down each rpm column. How can the engine produce the same power at a fixed rpm but with as much as an 8.2 inch variation in MP? (Unless you're assuming that you aren't leaning & you're wasting fuel at the lower MP's.)
It's incomplete because the engine will produce 75% at around 7k-8k feet altitude but it takes 2700 rpm to get 75% at that altitude. That number is in official Lyc charts. I've got one lying around somewhere but it's a really bad photocopy from a Lyc book & wouldn't be visible if I copied it again.
The number that can be calculated from Lyc power/fuel burn charts that's consistent with the top section of this chart is the calculated ~0.45 lb per hp per hour number at 75%. A 180 hp Lyc burns very close to 10 gph at 75%: 60 lb per hr/(6 lb per gal)=10 gal per hr. 60 lb per hr at 135 hp is very close to 0.45 lb per hp per hr.
Charlie
Tracy Crook wrote:
| Quote: | Thanks! Very interesting. Altitude looks like it has more effect on MP requirement than I thought. Must be the exhaust back pressure reduction at altitude as someone else pointed out. I had not factored that in and was only compensating for pumping losses.
Was also gratified that laws of physics still hold and there is no free lunch. It still takes a fixed amount of fuel to make a given amount of HP. Guess that's why the commercial pilots use fuel flow, which is the method I've been using. The change in MP requirement is hard to measure when using a fixed pitch prop when RPM is not directly controllable. Fuel flow takes all the math out of the calculation.
Also shows why it makes sense to fly at less than 75% power. Only took 5 lb/hr to get 10% more HP between 55 & 65% but double that to get the next 10% HP. Gets even worse above that.
Tracy Crook
On Sat, Dec 6, 2008 at 9:33 AM, J Riffel <riffeljl(at)gmail.com (riffeljl(at)gmail.com) <mailto:riffeljl(at)gmail.com (riffeljl(at)gmail.com)>> wrote:
A kind sole at Lycoming saw the RV post and sent this - which is
EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E,
-E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - *55%* Rated Fuel Flow *45 Lb/H*r RPM & MAP
117 HP - *65%* Rated Fuel Flow *50 Lb/Hr *RPM & MAP
135 HP-*75%*Rated Fuel Flow *60 Lb/Hr *RPM & MAP
*2100*
*2200*
*2300*
*2400*
*2100*
*2200*
*2300*
*2400*
*2200*
*2300*
*2400*
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure
approximately 0.17"hg. For each 10F variation in carburetor air
temperature from standard altitude temperature. Add manifold
pressure for air temperatures above standard; subtract for
temperatures below standard
|
===========
t="_blank">http://www.matronics.com/contribution
-Matt Dralle, List Admin.
===========
target="_blank">http://www.matronics.com/Navigator?RV-List
===========
MS -
k">http://forums.matronics.com
===========
[b]
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Vanremog(at)aol.com
Guest
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| Posted: Sun Dec 07, 2008 12:34 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
In a message dated 12/6/2008 6:36:00 A.M. Pacific Standard Time, riffeljl(at)gmail.com writes:
| Quote: | | A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. |
Makes me wonder what one of their halibuts might send if asked ...;o)
Do not archive.
N1GV (RV-6A, Flying 908hrs, O-360-A1A, C/S, Silicon Valley)
Make your life easier with all your friends, email, and favorite sites in one place. Try it now.
[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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sreynard
Joined: 30 May 2007
Posts: 13
Location: Santa Rosa, CA
|
| Posted: Sun Dec 07, 2008 10:56 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
They'll probably just flounder. . . . 
On Sun, Dec 7, 2008 at 12:33 AM, <Vanremog(at)aol.com (Vanremog(at)aol.com)> wrote:
[quote] In a message dated 12/6/2008 6:36:00 A.M. Pacific Standard Time, riffeljl(at)gmail.com (riffeljl(at)gmail.com) writes:
| Quote: | | A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. |
Makes me wonder what one of their halibuts might send if asked ...;o)
Do not archive.
N1GV (RV-6A, Flying 908hrs, O-360-A1A, C/S, Silicon Valley)
[b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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timb
Joined: 16 Apr 2008
Posts: 77
Location: Frankston, Texas
|
| Posted: Mon Dec 08, 2008 7:15 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
And so if they are still lurking, I would love to have this chart for the O-360-A1A.
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of J Riffel
Sent: Saturday, December 06, 2008 8:34 AM
To: rv-list
Subject: IO-360 -b Series Power Chart - FOUND
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - 55% Rated Fuel Flow 45 Lb/Hr RPM & MAP
117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP
135 HP-75%Rated Fuel Flow 60 Lb/Hr RPM & MAP
2100
2200
2300
2400
2100
2200
2300
2400
2200
2300
2400
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg. For each 10F variation in carburetor air temperature from standard altitude temperature. Add manifold pressure for air temperatures above standard; subtract for temperatures below standard | Quote: | | http://www.matronics.com/contribution |
01234567890123
[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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_________________
Tim Bryan
RV-6 Flying
N616TB |
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
| Posted: Mon Dec 08, 2008 7:28 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
Should be almost identical, since both engines have the same cylinders and power ratings.
Tim Bryan wrote: [quote] <![endif]--> <![endif]-->
And so if they are still lurking, I would love to have this chart for the O-360-A1A.
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of J Riffel
Sent: Saturday, December 06, 2008 8:34 AM
To: rv-list
Subject: IO-360 -b Series Power Chart - FOUND
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - 55% Rated Fuel Flow 45 Lb/Hr RPM & MAP
117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP
135 HP-75%Rated Fuel Flow 60 Lb/Hr RPM & MAP
2100
2200
2300
2400
2100
2200
2300
2400
2200
2300
2400
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg. For each 10F variation in carburetor air temperature from standard altitude temperature. Add manifold pressure for air temperatures above standard; subtract for temperatures below standard 0 1 2 3 4 5 6 7 8 9 0 1 2 3
4 [b]
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A&P/IA, EAA Tech Counselor # 5286
KCHD |
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n5lp(at)warpdriveonline.c
Guest
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| Posted: Mon Dec 08, 2008 8:03 am Post subject: IO-360 -b Series Power Chart - FOUND |
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On Dec 8, 2008, at 8:11 AM, Tim Bryan wrote:
| Quote: | And so if they are still lurking, I would love to have this chart
for the O-360-A1A.
|
Not from Lycoming, but this is what I came up with using Kevin
Horton's spreadsheet. I made it for my use with a fixed pitch prop so
it isn't as suitable for the lower RPMs typically used with a constant
speed.
http://n5lp.net/Power.htm
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wmjack1(at)t3cs.net
Guest
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| Posted: Mon Dec 08, 2008 8:04 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
You might want to have a look at this URL:
http://3limafoxtrot.com/doc/PercentPowerEntriesO360A.pdf
Jack Hilditch
RV-9A project
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Kelly McMullen
Sent: Monday, December 08, 2008 10:27 AM
To: rv-list(at)matronics.com
Subject: Re: IO-360 -b Series Power Chart - FOUND
Should be almost identical, since both engines have the same cylinders and power ratings.
Tim Bryan wrote:
<![endif]--> <![endif]-->And so if they are still lurking, I would love to have this chart for the O-360-A1A.
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of J Riffel
Sent: Saturday, December 06, 2008 8:34 AM
To: rv-list
Subject: IO-360 -b Series Power Chart - FOUND
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - 55% Rated Fuel Flow 45 Lb/Hr RPM & MAP
117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP
135 HP-75%Rated Fuel Flow 60 Lb/Hr RPM & MAP
2100
2200
2300
2400
2100
2200
2300
2400
2200
2300
2400
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg. For each 10F variation in carburetor air temperature from standard altitude temperature. Add manifold pressure for air temperatures above standard; subtract for temperatures below standard | Quote: | | http://www.matronics.com/contributionhttp://www.matronics.com/Navigator?RV-Listhttp://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/contribution href="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List href="http://forums.matronics.com">http://forums.matronics.com |
0123456789 | Quote: | | http://www.matronics.com/contribution |
0 | Quote: | | http://www.matronics.com/contribution |
1 | Quote: | | http://www.matronics.com/contribution |
2 | Quote: | | http://www.matronics.com/contribution |
3 | Quote: | | http://www.matronics.com/contribution |
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5 | Quote: | | http://www.matronics.com/contribution |
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9 | Quote: | | http://www.matronics.com/Navigator?RV-List |
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1 | Quote: | | http://www.matronics.com/Navigator?RV-List |
2 | Quote: | | http://www.matronics.com/Navigator?RV-List |
3
[quote][b]
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n212pj(at)gmail.com
Guest
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| Posted: Mon Dec 08, 2008 8:23 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
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Power increase as you go higher? I'm confused (which is normal).
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Jack Hilditch
Sent: Monday, December 08, 2008 8:04 AM
To: rv-list(at)matronics.com
Subject: RE: IO-360 -b Series Power Chart - FOUND
You might want to have a look at this URL:
http://3limafoxtrot.com/doc/PercentPowerEntriesO360A.pdf
Jack Hilditch
RV-9A project
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Kelly McMullen
Sent: Monday, December 08, 2008 10:27 AM
To: rv-list(at)matronics.com
Subject: Re: IO-360 -b Series Power Chart - FOUND
Should be almost identical, since both engines have the same cylinders and power ratings.
Tim Bryan wrote:
<![endif]--> <![endif]-->And so if they are still lurking, I would love to have this chart for the O-360-A1A.
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of J Riffel
Sent: Saturday, December 06, 2008 8:34 AM
To: rv-list
Subject: IO-360 -b Series Power Chart - FOUND
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - 55% Rated Fuel Flow 45 Lb/Hr RPM & MAP
117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP
135 HP-75%Rated Fuel Flow 60 Lb/Hr RPM & MAP
2100
2200
2300
2400
2100
2200
2300
2400
2200
2300
2400
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg. For each 10F variation in carburetor air temperature from standard altitude temperature. Add manifold pressure for air temperatures above standard; subtract for temperatures below standard012345678901234
5 [quote][b]
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timb
Joined: 16 Apr 2008
Posts: 77
Location: Frankston, Texas
|
| Posted: Mon Dec 08, 2008 10:43 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
Thanks everyone who replied. I got great info now.
Do Not Archive
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Jack Hilditch
Sent: Monday, December 08, 2008 10:04 AM
To: rv-list(at)matronics.com
Subject: RE: IO-360 -b Series Power Chart - FOUND
You might want to have a look at this URL:
http://3limafoxtrot.com/doc/PercentPowerEntriesO360A.pdf
Jack Hilditch
RV-9A project
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Kelly McMullen
Sent: Monday, December 08, 2008 10:27 AM
To: rv-list(at)matronics.com
Subject: Re: IO-360 -b Series Power Chart - FOUND
Should be almost identical, since both engines have the same cylinders and power ratings.
Tim Bryan wrote:
And so if they are still lurking, I would love to have this chart for the O-360-A1A.
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of J Riffel
Sent: Saturday, December 06, 2008 8:34 AM
To: rv-list
Subject: IO-360 -b Series Power Chart - FOUND
A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY what I was looking for. So I thought I'd share:
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft
Std. Alt. Temp. Fº
99 Hp - 55% Rated Fuel Flow 45 Lb/Hr RPM & MAP
117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP
135 HP-75%Rated Fuel Flow 60 Lb/Hr RPM & MAP
2100
2200
2300
2400
2100
2200
2300
2400
2200
2300
2400
SL
59
21.2
20.7
20.2
19.7
24.0
23.4
22.8
22.2
26.0
25.4
24.7
1
55
21.0
20.5
20.0
19.5
23.8
23.2
22.5
22.0
25.8
25.1
24.5
2
52
20.7
20.3
19.7
19.3
23.5
22.9
22.3
21.8
25.5
24.8
24.2
3
48
20.5
20.0
19.5
19.1
23.2
22.7
22.0
21.5
25.3
24.6
24.0
4
45
20.3
19.8
19.3
18.9
23.0
22.5
21.8
21.3
25.1
24.3
23.8
5
41
20.0
19.6
19.1
18.6
22.7
22.2
21.6
21.1
FT
24.1
23.5
6
38
19.8
19.4
18.9
18.4
22.5
22.0
21.3
20.9
FT
23.3
7
34
19.6
19.2
18.7
18.2
22.0
21.8
21.1
20.7
FT
8
31
19.3
18.9
18.4
18.0
FT
21.5
20.9
20.5
9
27
19.1
18.6
18.3
17.8
17.4
FT
10
23
18.9
18.4
18.1
17.6
17.2
11
19
18.6
FT
17.8
17.4
17.0
12
16
18.4
FT
17.1
16.8
13
12
FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg. For each 10F variation in carburetor air temperature from standard altitude temperature. Add manifold pressure for air temperatures above standard; subtract for temperatures below standard | Quote: | | http://www.matronics.com/contributionhttp://www.matronics.com/Navigator?RV-Listhttp://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/contribution href="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com/Navigator?RV-List href="http://forums.matronics.com">http://forums.matronics.com |
01234=====[/b][b]
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Tim Bryan
RV-6 Flying
N616TB |
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khorton01(at)rogers.com
Guest
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| Posted: Tue Dec 09, 2008 3:34 am Post subject: IO-360 -b Series Power Chart - FOUND |
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|
Pretty much any aircraft piston engine power chart shows that the
power does increase with altitude, IF the manifold pressure and rpm
are constant. But, if you have full throttle, the manifold pressure
will decrease with altitude, and thus the power will decrease.
Kevin Horton
On 8-Dec-08, at 11:21 , John Jessen wrote:
| Quote: | Power increase as you go higher? I'm confused (which is normal).
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com
] On Behalf Of Jack Hilditch
Sent: Monday, December 08, 2008 8:04 AM
To: rv-list(at)matronics.com
Subject: RE: IO-360 -b Series Power Chart - FOUND
You might want to have a look at this URL:
http://3limafoxtrot.com/doc/PercentPowerEntriesO360A.pdf
Jack Hilditch
RV-9A project
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com
] On Behalf Of Kelly McMullen
Sent: Monday, December 08, 2008 10:27 AM
To: rv-list(at)matronics.com
Subject: Re: IO-360 -b Series Power Chart - FOUND
Should be almost identical, since both engines have the same
cylinders and power ratings.
Tim Bryan wrote:
And so if they are still lurking, I would love to have this chart
for the O-360-A1A.
Tim Bryan
RV-6 Flying
N616TB over 120 hours now
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com
] On Behalf Of J Riffel
Sent: Saturday, December 06, 2008 8:34 AM
To: rv-list
Subject: IO-360 -b Series Power Chart - FOUND
A kind sole at Lycoming saw the RV post and sent this - which is
EXACTLY what I was looking for. So I thought I'd share:
|
--
Kevin Horton
Ottawa, Canada
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uw_matronics(at)wiedmann.
Guest
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| Posted: Tue Dec 09, 2008 10:40 am Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
Note that the tables are given for standard temperature: meaning at higher altitudes the temperature is lower. Same manifold pressure + lower temperature = more air. This is probably the main factor in increased power at altitude.
Lower pumping losses (because maintaining a given manifold pressure at a higher altitude requires a more open throttle) contribute.
On Tue, Dec 9, 2008 at 3:29 AM, Kevin Horton <khorton01(at)rogers.com (khorton01(at)rogers.com)> wrote:
[quote]--> RV-List message posted by: Kevin Horton <khorton01(at)rogers.com (khorton01(at)rogers.com)>
Pretty much any aircraft piston engine power chart shows that the power does increase with altitude, IF the manifold pressure and rpm are constant. But, if you have full throttle, the manifold pressure will decrease with altitude, and thus the power will decrease.
Kevin Horton
On 8-Dec-08, at 11:21 , John Jessen wrote:
--
Kevin Horton
Ottawa, Canada
[b]
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Doug Gray
Joined: 10 Jan 2006
Posts: 112
Location: Sydney, Australia
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| Posted: Tue Dec 09, 2008 12:03 pm Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
On Mon, 2008-12-08 at 09:11 -0600, Tim Bryan wrote:
| Quote: | And so if they are still lurking, I would love to have this chart for
the O-360-A1A.
|
And for an O-320D1A....
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jebrick(at)comcast.net
Guest
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| Posted: Tue Dec 09, 2008 1:58 pm Post subject: IO-360 -b Series Power Chart - FOUND |
|
|
At 65% and 2100 rpm, power stays constant while climbing at FT. Seems to
contradict Kevin Horton. Is the chart correct?
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft Std. Alt. Temp. Fo 99 Hp - 55% Rated Fuel Flow 45 Lb/Hr
RPM & MAP 117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP 135 HP-75%Rated
Fuel Flow 60 Lb/Hr RPM & MAP
2100 2200 2300 2400 2100 2200 2300 2400 2200 2300 2400
SL 59 21.2 20.7 20.2 19.7 24.0 23.4 22.8 22.2 26.0 25.4 24.7
1 55 21.0 20.5 20.0 19.5 23.8 23.2 22.5 22.0 25.8 25.1 24.5
2 52 20.7 20.3 19.7 19.3 23.5 22.9 22.3 21.8 25.5 24.8 24.2
3 48 20.5 20.0 19.5 19.1 23.2 22.7 22.0 21.5 25.3 24.6 24.0
4 45 20.3 19.8 19.3 18.9 23.0 22.5 21.8 21.3 25.1 24.3 23.8
5 41 20.0 19.6 19.1 18.6 22.7 22.2 21.6 21.1 FT 24.1 23.5
6 38 19.8 19.4 18.9 18.4 22.5 22.0 21.3 20.9 FT 23.3
7 34 19.6 19.2 18.7 18.2 22.0 21.8 21.1 20.7 FT
8 31 19.3 18.9 18.4 18.0 FT 21.5 20.9 20.5
9 27 19.1 18.6 18.3 17.8 17.4 FT
10 23 18.9 18.4 18.1 17.6 17.2
11 19 18.6 FT 17.8 17.4 17.0
12 16 18.4 FT 17.1 16.8
13 12 FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg.
For each 10F variation in carburetor air temperature from standard altitude
temperature. Add manifold pressure for air temperatures above standard;
subtract for temperatures below standard
--
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uw_matronics(at)wiedmann.
Guest
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| Posted: Wed Dec 10, 2008 4:18 pm Post subject: IO-360 -b Series Power Chart - FOUND |
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The 65% on the chart is rated fuel flow (and power), not a throttle setting.
As your altitude increases, you're going to be increasing your throttle setting to maintain 65% fuel flow at 2100 rpm, eventually reaching FT at 8000 feet. Above 8000 feet, you will no longer be able to maintain 65% fuel flow/power at 2100 rpm.
On Tue, Dec 9, 2008 at 1:57 PM, John Brick <jebrick(at)comcast.net (jebrick(at)comcast.net)> wrote:
[quote]--> RV-List message posted by: "John Brick" <jebrick(at)comcast.net (jebrick(at)comcast.net)>
At 65% and 2100 rpm, power stays constant while climbing at FT. Seems to
contradict Kevin Horton. Is the chart correct?
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft Std. Alt. Temp. Fo 99 Hp - 55% Rated Fuel Flow 45 Lb/Hr
RPM & MAP 117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP 135 HP-75%Rated
Fuel Flow 60 Lb/Hr RPM & MAP
2100 2200 2300 2400 2100 2200 2300 2400 2200 2300 2400
SL 59 21.2 20.7 20.2 19.7 24.0 23.4 22.8 22.2 26.0 25.4 24.7
1 55 21.0 20.5 20.0 19.5 23.8 23.2 22.5 22.0 25.8 25.1 24.5
2 52 20.7 20.3 19.7 19.3 23.5 22.9 22.3 21.8 25.5 24.8 24.2
3 48 20.5 20.0 19.5 19.1 23.2 22.7 22.0 21.5 25.3 24.6 24.0
4 45 20.3 19.8 19.3 18.9 23.0 22.5 21.8 21.3 25.1 24.3 23.8
5 41 20.0 19.6 19.1 18.6 22.7 22.2 21.6 21.1 FT 24.1 23.5
6 38 19.8 19.4 18.9 18.4 22.5 22.0 21.3 20.9 FT 23.3
7 34 19.6 19.2 18.7 18.2 22.0 21.8 21.1 20.7 FT
8 31 19.3 18.9 18.4 18.0 FT 21.5 20.9 20.5
9 27 19.1 18.6 18.3 17.8 17.4 FT
10 23 18.9 18.4 18.1 17.6 17.2
11 19 18.6 FT 17.8 17.4 17.0
12 16 18.4 FT 17.1 16.8
13 12 FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg.
For each 10F variation in carburetor air temperature from standard altitude
temperature. Add manifold pressure for air temperatures above standard;
subtract for temperatures below standard
--
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khorton01(at)rogers.com
Guest
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| Posted: Wed Dec 10, 2008 5:57 pm Post subject: IO-360 -b Series Power Chart - FOUND |
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I you believe the temperature correction that Lycoming describes on
their power charts, then the colder temperature only explains about 20%
of the hp increase with altitude.
For example, consider 2500 rpm and 23" MP, using Lycoming curve 10350A
for the O-360-A series engines (note that the current Lycoming Operators
Manual has a newer power chart, which gives slightly different results,
but I don't have that one at hand tonight).
sea level, std temperature (15 deg C): 131 hp
5000 ft, std temperature (5.1 deg C): 141 hp
5000 ft, 15 deg C: 139 hp
I get similar results using Lycoming curve 12700-A for the IO-360-A
series engines.
Kevin Horton
Ulrich Wiedmann wrote:
| Quote: | Note that the tables are given for standard temperature: meaning at higher
altitudes the temperature is lower. Same manifold pressure + lower
temperature = more air. This is probably the main factor in increased power
at altitude.
Lower pumping losses (because maintaining a given manifold pressure at a
higher altitude requires a more open throttle) contribute.
On Tue, Dec 9, 2008 at 3:29 AM, Kevin Horton <khorton01(at)rogers.com> wrote:
>
>
> Pretty much any aircraft piston engine power chart shows that the power
> does increase with altitude, IF the manifold pressure and rpm are constant.
> But, if you have full throttle, the manifold pressure will decrease with
> altitude, and thus the power will decrease.
>
> Kevin Horton
> On 8-Dec-08, at 11:21 , John Jessen wrote:
>
> Power increase as you go higher? I'm confused (which is normal).
>
>> From: owner-rv-list-server(at)matronics.com [mailto:
>> owner-rv-list-server(at)matronics.com] On Behalf Of Jack Hilditch
>> Sent: Monday, December 08, 2008 8:04 AM
>> To: rv-list(at)matronics.com
>> Subject: RE: IO-360 -b Series Power Chart - FOUND
>>
>> You might want to have a look at this URL:
>>
>> http://3limafoxtrot.com/doc/PercentPowerEntriesO360A.pdf
>>
>>
>> Jack Hilditch
>> RV-9A project
>> From: owner-rv-list-server(at)matronics.com [mailto:
>> owner-rv-list-server(at)matronics.com] On Behalf Of Kelly McMullen
>> Sent: Monday, December 08, 2008 10:27 AM
>> To: rv-list(at)matronics.com
>> Subject: Re: IO-360 -b Series Power Chart - FOUND
>>
>> Should be almost identical, since both engines have the same cylinders and
>> power ratings.
>>
>> Tim Bryan wrote:
>> And so if they are still lurking, I would love to have this chart for the
>> O-360-A1A.
>>
>> Tim Bryan
>> RV-6 Flying
>> N616TB over 120 hours now
>>
>> From: owner-rv-list-server(at)matronics.com [mailto:
>> owner-rv-list-server(at)matronics.com] On Behalf Of J Riffel
>> Sent: Saturday, December 06, 2008 8:34 AM
>> To: rv-list
>> Subject: IO-360 -b Series Power Chart - FOUND
>>
>> A kind sole at Lycoming saw the RV post and sent this - which is EXACTLY
>> what I was looking for. So I thought I'd share:
>>
>>
>>
>>
>>
> --
> Kevin Horton
> Ottawa, Canada
>
|
--
Kevin Horton
RV-8 (Grounded)
Ottawa, Canada
http://www.kilohotel.com/rv8
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khorton01(at)rogers.com
Guest
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| Posted: Wed Dec 10, 2008 6:03 pm Post subject: IO-360 -b Series Power Chart - FOUND |
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|
Actually, for a constant power of 65%, at 2100 rpm, the chart below
shows that you need less MP as you climb. At sea level, you need 24.0
inches, and at 7000 ft you only need 22.0 inches of MP. This means
that if you adjusted the throttle to keep MP constant as you climbed,
the power would increase. It confirms what I have been saying.
Kevin Horton
John Brick wrote:
[quote]
At 65% and 2100 rpm, power stays constant while climbing at FT. Seems to
contradict Kevin Horton. Is the chart correct?
Fuel and Power Chart - Lycoming Model IO-360-B1B, -B1D, -B1E, -E1A, - B1A
Press. Alt. 1000 Ft Std. Alt. Temp. Fo 99 Hp - 55% Rated Fuel Flow 45 Lb/Hr
RPM & MAP 117 HP - 65% Rated Fuel Flow 50 Lb/Hr RPM & MAP 135 HP-75%Rated
Fuel Flow 60 Lb/Hr RPM & MAP
2100 2200 2300 2400 2100 2200 2300 2400 2200 2300 2400
SL 59 21.2 20.7 20.2 19.7 24.0 23.4 22.8 22.2 26.0 25.4 24.7
1 55 21.0 20.5 20.0 19.5 23.8 23.2 22.5 22.0 25.8 25.1 24.5
2 52 20.7 20.3 19.7 19.3 23.5 22.9 22.3 21.8 25.5 24.8 24.2
3 48 20.5 20.0 19.5 19.1 23.2 22.7 22.0 21.5 25.3 24.6 24.0
4 45 20.3 19.8 19.3 18.9 23.0 22.5 21.8 21.3 25.1 24.3 23.8
5 41 20.0 19.6 19.1 18.6 22.7 22.2 21.6 21.1 FT 24.1 23.5
6 38 19.8 19.4 18.9 18.4 22.5 22.0 21.3 20.9 FT 23.3
7 34 19.6 19.2 18.7 18.2 22.0 21.8 21.1 20.7 FT
8 31 19.3 18.9 18.4 18.0 FT 21.5 20.9 20.5
9 27 19.1 18.6 18.3 17.8 17.4 FT
10 23 18.9 18.4 18.1 17.6 17.2
11 19 18.6 FT 17.8 17.4 17.0
12 16 18.4 FT 17.1 16.8
13 12 FT
To Maintain constant power, correct manifold pressure approximately 0.17"hg.
For each 10F variation in carburetor air temperature from standard altitude
temperature. Add manifold pressure for air temperatures above standard;
subtract for temperatures below standard
--
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jebrick(at)comcast.net
Guest
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| Posted: Wed Dec 10, 2008 8:43 pm Post subject: IO-360 -b Series Power Chart - FOUND |
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|
The way I read he chart is that 117 hp (65% of 180) is maintained all the way to 12K, at 2100 rpm… even though full throttle was reached at 8000. Is that wrong? Why else would those map’s be listed under that heading?
<![if !supportEmptyParas]> <![endif]>
-----Original Message-----
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com]On Behalf Of Ulrich Wiedmann
Sent: Wednesday, December 10, 2008 4:18 PM
To: rv-list(at)matronics.com
Subject: Re: IO-360 -b Series Power Chart - FOUND
<![if !supportEmptyParas]> <![endif]>
The 65% on the chart is rated fuel flow (and power), not a throttle setting.
As your altitude increases, you're going to be increasing your throttle setting to maintain 65% fuel flow at 2100 rpm, eventually reaching FT at 8000 feet. Above 8000 feet, you will no longer be able to maintain 65% fuel flow/power at 2100 rpm.
On Tue, Dec 9, 2008 at 1:57 PM, John Brick <jebrick(at)comcast.net (jebrick(at)comcast.net)> wrote:
--> RV-List message posted by: "John Brick" <jebrick(at)comcast.net (jebrick(at)comcast.net)>
At 65% and 2100 rpm, power stays constant while climbing at FT. Seems to
contradict Kevin Horton. Is the chart correct?
<![if !supportLineBreakNewLine]> <![endif]>
[quote][b]
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