 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
recapen(at)earthlink.net
Guest
|
 Posted: Mon Jul 20, 2009 7:38 am Post subject: CHT update |
 |
|
After monkeying with my #1 cylinder blockoff plate (too many times), I ended up with a removeable plate about 3/4" tall on the outboard side gradually sloping to about 1-1/2" on the inboard side.
The cruise CHTs are within 10 degrees from highest to lowest and within 5 degrees of the average and run between 330 and 370. FWIW, cruise EGT's are within 20 degrees from highest to lowest and within 10 degrees of average and run between 1150 and 1250.
Climbing and descending get a little out of kilter - but stay within limits.
So everyone knows the environment....:
RV6A with larger main tires and 5x5 nosewheel tire and fork (grass strip)
AerosportPower IO360B1F6 (180hp)
9.2:1 pistons
AFP injection (updraft)
LASAR ignition (with CHT sender in alternate location to facilitate diagnostics)
Vetterman dual crossover heater-mufflers
SamJames Cowl and plenum (newer intake box)
AFS3400EM providing engine diagnostic data
On to more test flying,
Ralph
| | - The Matronics LycomingEngines-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?LycomingEngines-List |
|
|
|
| Back to top |
|
 |
Ollie Washburn
Joined: 10 Jan 2006
Posts: 56
Location: Central Florida
|
| Posted: Mon Jul 20, 2009 7:52 am Post subject: CHT update |
|
|
Ralph,
Did you make your own nose wheel fork?
Ollie
6A & S7S
On Mon, Jul 20, 2009 at 11:36 AM, Ralph E. Capen <recapen(at)earthlink.net (recapen(at)earthlink.net)> wrote:
[quote]--> LycomingEngines-List message posted by: "Ralph E. Capen" <recapen(at)earthlink.net (recapen(at)earthlink.net)>
After monkeying with my #1 cylinder blockoff plate (too many times), I ended up with a removeable plate about 3/4" tall on the outboard side gradually sloping to about 1-1/2" on the inboard side.
The cruise CHTs are within 10 degrees from highest to lowest and within 5 degrees of the average and run between 330 and 370. FWIW, cruise EGT's are within 20 degrees from highest to lowest and within 10 degrees of average and run between 1150 and 1250.
Climbing and descending get a little out of kilter - but stay within limits.
So everyone knows the environment....:
RV6A with larger main tires and 5x5 nosewheel tire and fork (grass strip)
AerosportPower IO360B1F6 (180hp)
9.2:1 pistons
AFP injection (updraft)
LASAR ignition (with CHT sender in alternate location to facilitate diagnostics)
Vetterman dual crossover heater-mufflers
SamJames Cowl and plenum (newer intake box)
AFS3400EM providing engine diagnostic data
On to more test flying,
Ralph
===========
nes-List" target="_blank">http://www.matronics.com/Navigator?LycomingEngines-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
[b]
| | - The Matronics LycomingEngines-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?LycomingEngines-List |
|
_________________
Ollie RV6-A & Rans S7S
Central FL |
|
| Back to top |
|
|
recapen(at)earthlink.net
Guest
|
| Posted: Mon Jul 20, 2009 8:18 am Post subject: CHT update |
|
|
I'll answer this one off-line so as not to confuse the subject
--
| | - The Matronics LycomingEngines-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?LycomingEngines-List |
|
|
|
| Back to top |
|
|
mcculleyja(at)starpower.n
Guest
|
| Posted: Mon Jul 20, 2009 11:14 am Post subject: CHT update |
|
|
Your results are similar to mine with a standard Lyc O-360 and standard
production piston compression ratios.
Can you comment on the various dimensions you experimented with prior to
the ones with 3/4" outboard end and 1-1/2" inboard end, as related to
the temperatures they created? Any pics available? Also, what actual
temperatures are you seeing in climb that you referred to as being "a
little out of kilter--but stay within limits"?
Jim McCulley
============================================================================================================
Ralph E. Capen wrote:
| Quote: |
After monkeying with my #1 cylinder blockoff plate (too many times), I ended up with a removeable plate about 3/4" tall on the outboard side gradually sloping to about 1-1/2" on the inboard side.
The cruise CHTs are within 10 degrees from highest to lowest and within 5 degrees of the average and run between 330 and 370. FWIW, cruise EGT's are within 20 degrees from highest to lowest and within 10 degrees of average and run between 1150 and 1250.
Climbing and descending get a little out of kilter - but stay within limits.
So everyone knows the environment....:
RV6A with larger main tires and 5x5 nosewheel tire and fork (grass strip)
AerosportPower IO360B1F6 (180hp)
9.2:1 pistons
AFP injection (updraft)
LASAR ignition (with CHT sender in alternate location to facilitate diagnostics)
Vetterman dual crossover heater-mufflers
SamJames Cowl and plenum (newer intake box)
AFS3400EM providing engine diagnostic data
On to more test flying,
Ralph
|
| | - The Matronics LycomingEngines-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?LycomingEngines-List |
|
|
|
| Back to top |
|
|
recapen(at)earthlink.net
Guest
|
| Posted: Mon Jul 20, 2009 12:24 pm Post subject: CHT update |
|
|
Forwarded without attachments - if someone wants them contact me directly.....
-----Forwarded Message-----
[quote]From: "Ralph E. Capen" <recapen(at)earthlink.net>
Sent: Jul 20, 2009 3:56 PM
To: lycoming engine list <lycomingengines-list(at)matronics.com>
Cc: mcculleyja(at)starpower.net
Subject: Re: CHT update
Here's a picture of what I started with. I did not change the width - only the height - and I tried to
maintain the profile of the cylinder head as I shortened it.
At first, I took off 1/16" - not seeing any results.....one of the posters verbally whacked me on the head....
I removed it completely to see the difference (and made it removeable for iterative maintenance). I flew
once without it. Then, I put it back on with 7/16" more removed and got some satisfaction. Whacked
another 3/16" to get real close - then I took about 1/16" more from the thicker (inboard) side.
The spreadsheet represents a two-part flight - the first part I was trying to lean the engine a bit and the
#3 started going up. The second part had a pretty long cruise segment where the CHT's stayed pretty
much together. The climbs and descents are where they got out of kilter in my opinion.
Maybe, it is a gozillionth of an inch too small now.....
Hope this helps
--
| | - The Matronics LycomingEngines-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?LycomingEngines-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
