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hammerhead
Joined: 02 Oct 2010
Posts: 5
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 Posted: Sat Jan 22, 2011 6:01 am Post subject: Prop not turning |
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Hello all. I am a fairly new owner of a Yak-52 and I don't have much experience with the internals of it yet. This is my first winter season. My plan was to fly regularly during the winter so I haven't done anything to conserve the engine during the cold, below 0 C, winter we get here in Scandinavia. Anyway, since the cold weather arrived I just can't get the starter to turn the prop. With the air on I push the starter, but all I hear is a humming, hizzing noise. I have heard this noise before once when I forgot to turn the main air valve on. Nothing happens except for that sound. Does anybody have a suggestion as to what I could try or look for to get the starter to work? I will try leaving the heater on for more than a few hours the next time, but in the meantime it would be interesting to find out the steps that happens (or should happen) internally when the start button is pushed? I have looked at the schematics over the air system, but it is a static view that doesn't seem to help me right now.
Regards, Henrik
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radiopicture
Joined: 23 Jun 2008
Posts: 263
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| Posted: Sat Jan 22, 2011 6:21 am Post subject: Prop not turning |
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Henrik:
First, I'm assuming the engine is pre-heated to above 5 degrees C (preferably more like 12), and you've pulled the prop through, etc.
The buzzing is the shower of sparks. If you're not getting a "pop" noise before the hissing, then the air valve isn't opening for some reason. If you're not clearing out the snot valve after each flight, the mixture of glycerine, oil blow-by and condensate can freeze things in the air system. If the plane can be warmed in a hangar, I think I'd try that first.
-Eric
On Jan 22, 2011, at 9:01 AM, hammerhead wrote:
| Quote: |
Hello all. I am a fairly new owner of a Yak-52 and I don't have much experience with the internals of it yet. This is my first winter season. My plan was to fly regularly during the winter so I haven't done anything to conserve the engine during the cold, below 0 C, winter we get here in Scandinavia. Anyway, since the cold weather arrived I just can't get the starter to turn the prop. With the air on I push the starter, but all I hear is a humming, hizzing noise. I have heard this noise before once when I forgot to turn the main air valve on. Nothing happens except for that sound. Does anybody have a suggestion as to what I could try or look for to get the starter to work? I will try leaving the heater on for more than a few hours the next time, but in the meantime it would be interesting to find out the steps that happens (or should happen) internally when the start button is pushed? I have looked at the schematics over the air system, but it is a static view that doesn't s!
eem to help me right now.
Regards, Henrik
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=327870#327870
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talew(at)bellsouth.net
Guest
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| Posted: Sat Jan 22, 2011 7:04 am Post subject: Prop not turning |
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Hi Henrik,
The very first thing You should check is the condition
of the batteries . The start valve needs a lot if current to open .
The spark vibrator is on the same circuit . This means you must
have good batteries for both of these to work properly at the same time .
Terry
---
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pa3arw(at)euronet.nl
Guest
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| Posted: Sat Jan 22, 2011 7:25 am Post subject: Prop not turning |
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Henrik,
This is not a big problem. Assuming the following is ok:
Outside airtemp 5 degrees C or higher, otherwise I advise to pre warm the engine one way or the other.
Battery voltage is OK, i.e. 24v. If you push the button and you don’t see the control lights go out one may assume that that is OK.
Ait bottle filled at 45 bars min and air valve open.
If the things above are all OK I suggest the following:
Close the air valve.
Make sure electrical power is shut off and brakes are on.
Check both mag switches are OFF.
Now do the following:
Make sure nobody comes in the area of the propellor.
On the left side of the ruddercontrol, inside the cockpit against the fire wall, you will notice a valve.
This valve controls the air to the air distributor which makes the prop turn.
On the right side of the valve you will notice a small spoon like nipple.
Use a stick or something, or if you lucky and small enought you can touch it with you hands, to move this little spoon up and down.
This will manually activate the air to the airdistributor, that is why you have to make sure there is nobody in the prop area, beause the prop will turn,just a little, but it will turn.
If it has done that, start the engine with the normal procedure.
Sometimes, when it is cold, it may happen that this valve gets a bit stuck.
Please do me favour: makes sure both mag switches and the power are switched of....otherwise...wll you know what may happen....
Let me know how it went.
Hans
RA3326K
Netherlands
------ Einde van doorgestuurd bericht
[quote][b]
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yakplt(at)yahoo.com
Guest
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| Posted: Sat Jan 22, 2011 7:42 am Post subject: Prop not turning |
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If you hear buzzing then you have a battery that is at least alive. Next time you try to start, look at your voltmeter/ammeter gage. When you push in the button it reads volts. Push the button in and read the voltage. It should be close to 24 volts. While holding the button in, hit the starter. If the voltage drops down to 19 volts or so, your batteries need charge, or replacment. If you replace them, always replace both at the same time, assuming you have already replaced the stock battery.
Next. I assume you have pulled the prop through a WHOLE bunch on a cold engine and that you have gotten every bit of oil out of it while doing so. If this has been done and the engine still does not rotate, then you are either not getting air or water is frozen in a line.
The electrical starter valve on a YAK 52 is ... as I remember it (I own a YAK-50 and not a 52) down by your left foot. Get your head down in there and find it. It will be a round cylinder about 6-8 inches long almost gold in color and it will have an air line hooked to the top and the bottom of it. Also an electrical cannon plug in the top or bottom third of it. FIND THIS. Now see if it has a small little metal tab/lever sticking out of it. This is the MANUAL LEVEL to actuate this valve.
Open your main air valve, make sure your main air pressure is 40-50 bars, and then clear the prop. Leave the mags OFF. Now push on this lever. If the prop suddenly starts turning, you have found your problem.
If the valve works manually but not electrically, you can try cleaning it by taking off the top air line and spraying WD-40 down in there to clean it out, but this is typically only a temp. fix. Better to replace it. Be aware that a CJ-6 uses the exact same valve. Not ALMOST the same, it uses the EXACT same valve. See Doug Sapp.
If THIS does not work... I.E. the engine still does not turn, now you really have a headache on your hands. Let's not go there. The first thing is to really get that airplane in a heated hangar and see if it will then work. If it STILL fails, then you need to start finding out why air is not getting to your starter distributor on the engine. This kind of detail is not necessary unless you really get to that point.
The most likely thing is that the starter valve is not opening. By using the manual lever on the side of it to manually open it, you will be able to prove that quickly.
Mark Bitterlich
--- On Sat, 1/22/11, hammerhead <henrik.andoff(at)had.se> wrote:
| Quote: | From: hammerhead <henrik.andoff(at)had.se>
Subject: Prop not turning
To: yak-list(at)matronics.com
Date: Saturday, January 22, 2011, 9:01 AM
"hammerhead" <henrik.andoff(at)had.se>
Hello all. I am a fairly new owner of a Yak-52 and I don't
have much experience with the internals of it yet. This is
my first winter season. My plan was to fly regularly during
the winter so I haven't done anything to conserve the engine
during the cold, below 0 C, winter we get here in
Scandinavia. Anyway, since the cold weather arrived I just
can't get the starter to turn the prop. With the air on I
push the starter, but all I hear is a humming, hizzing
noise. I have heard this noise before once when I forgot to
turn the main air valve on. Nothing happens except for that
sound. Does anybody have a suggestion as to what I could try
or look for to get the starter to work? I will try leaving
the heater on for more than a few hours the next time, but
in the meantime it would be interesting to find out the
steps that happens (or should happen) internally when the
start button is pushed? I have looked at the schematics over
the air system, but it is a static view that doesn't s!
eem to help me right now.
Regards, Henrik
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=327870#327870
Forum -
FAQ,
- MATRONICS WEB FORUMS -
List Contribution Web Site -
-Matt
Dralle, List Admin.
|
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pa3arw(at)euronet.nl
Guest
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| Posted: Sat Jan 22, 2011 9:02 am Post subject: Prop not turning |
|
|
Mark,
I have given him the same procedure....quite frankly I had exactly the same
problem yesterday when I wanted to fly my Yak52 even at +6 degrees C.
Hans
RA3326K
Op 22-01-11 16:33, Yak Pilot <yakplt(at)yahoo.com> schreef:
| Quote: |
If you hear buzzing then you have a battery that is at least alive. Next time
you try to start, look at your voltmeter/ammeter gage. When you push in the
button it reads volts. Push the button in and read the voltage. It should be
close to 24 volts. While holding the button in, hit the starter. If the
voltage drops down to 19 volts or so, your batteries need charge, or
replacment. If you replace them, always replace both at the same time,
assuming you have already replaced the stock battery.
Next. I assume you have pulled the prop through a WHOLE bunch on a cold
engine and that you have gotten every bit of oil out of it while doing so. If
this has been done and the engine still does not rotate, then you are either
not getting air or water is frozen in a line.
The electrical starter valve on a YAK 52 is ... as I remember it (I own a
YAK-50 and not a 52) down by your left foot. Get your head down in there and
find it. It will be a round cylinder about 6-8 inches long almost gold in
color and it will have an air line hooked to the top and the bottom of it.
Also an electrical cannon plug in the top or bottom third of it. FIND THIS.
Now see if it has a small little metal tab/lever sticking out of it. This is
the MANUAL LEVEL to actuate this valve.
Open your main air valve, make sure your main air pressure is 40-50 bars, and
then clear the prop. Leave the mags OFF. Now push on this lever. If the
prop suddenly starts turning, you have found your problem.
If the valve works manually but not electrically, you can try cleaning it by
taking off the top air line and spraying WD-40 down in there to clean it out,
but this is typically only a temp. fix. Better to replace it. Be aware that
a CJ-6 uses the exact same valve. Not ALMOST the same, it uses the EXACT same
valve. See Doug Sapp.
If THIS does not work... I.E. the engine still does not turn, now you really
have a headache on your hands. Let's not go there. The first thing is to
really get that airplane in a heated hangar and see if it will then work. If
it STILL fails, then you need to start finding out why air is not getting to
your starter distributor on the engine. This kind of detail is not necessary
unless you really get to that point.
The most likely thing is that the starter valve is not opening. By using the
manual lever on the side of it to manually open it, you will be able to prove
that quickly.
Mark Bitterlich
--- On Sat, 1/22/11, hammerhead <henrik.andoff(at)had.se> wrote:
> From: hammerhead <henrik.andoff(at)had.se>
> Subject: Prop not turning
> To: yak-list(at)matronics.com
> Date: Saturday, January 22, 2011, 9:01 AM
>
> "hammerhead" <henrik.andoff(at)had.se>
>
> Hello all. I am a fairly new owner of a Yak-52 and I don't
> have much experience with the internals of it yet. This is
> my first winter season. My plan was to fly regularly during
> the winter so I haven't done anything to conserve the engine
> during the cold, below 0 C, winter we get here in
> Scandinavia. Anyway, since the cold weather arrived I just
> can't get the starter to turn the prop. With the air on I
> push the starter, but all I hear is a humming, hizzing
> noise. I have heard this noise before once when I forgot to
> turn the main air valve on. Nothing happens except for that
> sound. Does anybody have a suggestion as to what I could try
> or look for to get the starter to work? I will try leaving
> the heater on for more than a few hours the next time, but
> in the meantime it would be interesting to find out the
> steps that happens (or should happen) internally when the
> start button is pushed? I have looked at the schematics over
> the air system, but it is a static view that doesn't s!
> eem to help me right now.
>
> Regards, Henrik
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=327870#327870
>
>
>
>
>
>
>
> Forum -
> FAQ,
> - MATRONICS WEB FORUMS -
> List Contribution Web Site -
> -Matt
> Dralle, List Admin.
>
>
>
>
|
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dsavarese0812(at)bellsout
Guest
|
| Posted: Sat Jan 22, 2011 9:14 am Post subject: Prop not turning |
|
|
Henrik,
The problem is the air start valve in front of your left foot on the
back side of the firewall is sticking. You may try energizing the air
start valve manually with the small tab on the right side of the valve.
When you lift it, the air start valve is opened manually instead of
electrically as is done when you press the start button. The only way
to fix this problem is to remove the air start valve from the back side
of the firewall and either replace it or possibly clean out the junk
that has accumulated inside the plunger section.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (cell)
Skype: Yakguy1
www.yak-52.com
On 1/22/2011 8:01 AM, hammerhead wrote:
| Quote: |
Hello all. I am a fairly new owner of a Yak-52 and I don't have much experience with the internals of it yet. This is my first winter season. My plan was to fly regularly during the winter so I haven't done anything to conserve the engine during the cold, below 0 C, winter we get here in Scandinavia. Anyway, since the cold weather arrived I just can't get the starter to turn the prop. With the air on I push the starter, but all I hear is a humming, hizzing noise. I have heard this noise before once when I forgot to turn the main air valve on. Nothing happens except for that sound. Does anybody have a suggestion as to what I could try or look for to get the starter to work? I will try leaving the heater on for more than a few hours the next time, but in the meantime it would be interesting to find out the steps that happens (or should happen) internally when the start button is pushed? I have looked at the schematics over the air system, but it is a static view that doesn't
|
s!
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dsavarese0812(at)bellsout
Guest
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| Posted: Sat Jan 22, 2011 9:17 am Post subject: Prop not turning |
|
|
Eric,
You're correct about the buzzing. But the air start valve is hanging
up. Easy to figure out by moving the little tab on the side of the air
start valve to open the valve manually. Most likely this is the culprit
and happens frequently in cold weather due to the gunk inside the valve
the builds up over the years.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (cell)
Skype: Yakguy1
www.yak-52.com
On 1/22/2011 8:18 AM, Eric Wobschall wrote:
| Quote: |
Henrik:
First, I'm assuming the engine is pre-heated to above 5 degrees C (preferably more like 12), and you've pulled the prop through, etc.
The buzzing is the shower of sparks. If you're not getting a "pop" noise before the hissing, then the air valve isn't opening for some reason. If you're not clearing out the snot valve after each flight, the mixture of glycerine, oil blow-by and condensate can freeze things in the air system. If the plane can be warmed in a hangar, I think I'd try that first.
-Eric
On Jan 22, 2011, at 9:01 AM, hammerhead wrote:
>
>
> Hello all. I am a fairly new owner of a Yak-52 and I don't have much experience with the internals of it yet. This is my first winter season. My plan was to fly regularly during the winter so I haven't done anything to conserve the engine during the cold, below 0 C, winter we get here in Scandinavia. Anyway, since the cold weather arrived I just can't get the starter to turn the prop. With the air on I push the starter, but all I hear is a humming, hizzing noise. I have heard this noise before once when I forgot to turn the main air valve on. Nothing happens except for that sound. Does anybody have a suggestion as to what I could try or look for to get the starter to work? I will try leaving the heater on for more than a few hours the next time, but in the meantime it would be interesting to find out the steps that happens (or should happen) internally when the start button is pushed? I have looked at the schematics over the air system, but it is a static view that doesn'
|
t!
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yakplt(at)yahoo.com
Guest
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| Posted: Sat Jan 22, 2011 10:21 am Post subject: Prop not turning |
|
|
Hans, I wrote mine before I read yours. 
The actual starter valve probably has just a small amount of moisture in it that froze.
Thanks,
Mark
--- On Sat, 1/22/11, Hans Oortman <pa3arw(at)euronet.nl> wrote:
| Quote: | From: Hans Oortman <pa3arw(at)euronet.nl>
Subject: Re: Prop not turning
To: yak-list(at)matronics.com
Date: Saturday, January 22, 2011, 12:00 PM
Hans Oortman <pa3arw(at)euronet.nl>
Mark,
I have given him the same procedure....quite frankly I had
exactly the same
problem yesterday when I wanted to fly my Yak52 even at +6
degrees C.
Hans
RA3326K
Op 22-01-11 16:33, Yak Pilot <yakplt(at)yahoo.com>
schreef:
>
>
> If you hear buzzing then you have a battery that is at
least alive. Next time
> you try to start, look at your voltmeter/ammeter
gage. When you push in the
> button it reads volts. Push the button in and
read the voltage. It should be
> close to 24 volts. While holding the button in, hit
the starter. If the
> voltage drops down to 19 volts or so, your batteries
need charge, or
> replacment. If you replace them, always replace
both at the same time,
> assuming you have already replaced the stock battery.
>
> Next. I assume you have pulled the prop through
a WHOLE bunch on a cold
> engine and that you have gotten every bit of oil out
of it while doing so. If
> this has been done and the engine still does not
rotate, then you are either
> not getting air or water is frozen in a line.
>
> The electrical starter valve on a YAK 52 is ... as I
remember it (I own a
> YAK-50 and not a 52) down by your left foot. Get
your head down in there and
> find it. It will be a round cylinder about 6-8
inches long almost gold in
> color and it will have an air line hooked to the top
and the bottom of it.
> Also an electrical cannon plug in the top or bottom
third of it. FIND THIS.
> Now see if it has a small little metal tab/lever
sticking out of it. This is
> the MANUAL LEVEL to actuate this valve.
>
> Open your main air valve, make sure your main air
pressure is 40-50 bars, and
> then clear the prop. Leave the mags OFF.
Now push on this lever. If the
> prop suddenly starts turning, you have found your
problem.
>
> If the valve works manually but not electrically, you
can try cleaning it by
> taking off the top air line and spraying WD-40 down in
there to clean it out,
> but this is typically only a temp. fix. Better
to replace it. Be aware that
> a CJ-6 uses the exact same valve. Not ALMOST the same,
it uses the EXACT same
> valve. See Doug Sapp.
>
> If THIS does not work... I.E. the engine still does
not turn, now you really
> have a headache on your hands. Let's not go
there. The first thing is to
> really get that airplane in a heated hangar and see if
it will then work. If
> it STILL fails, then you need to start finding out why
air is not getting to
> your starter distributor on the engine. This
kind of detail is not necessary
> unless you really get to that point.
>
> The most likely thing is that the starter valve is not
opening. By using the
> manual lever on the side of it to manually open it,
you will be able to prove
> that quickly.
>
> Mark Bitterlich
>
>
> --- On Sat, 1/22/11, hammerhead <henrik.andoff(at)had.se>
wrote:
>
>> From: hammerhead <henrik.andoff(at)had.se>
>> Subject: Prop not turning
>> To: yak-list(at)matronics.com
>> Date: Saturday, January 22, 2011, 9:01 AM
>>
>> "hammerhead" <henrik.andoff(at)had.se>
>>
>> Hello all. I am a fairly new owner of a Yak-52 and
I don't
>> have much experience with the internals of it yet.
This is
>> my first winter season. My plan was to fly
regularly during
>> the winter so I haven't done anything to conserve
the engine
>> during the cold, below 0 C, winter we get here in
>> Scandinavia. Anyway, since the cold weather
arrived I just
>> can't get the starter to turn the prop. With the
air on I
>> push the starter, but all I hear is a humming,
hizzing
>> noise. I have heard this noise before once when I
forgot to
>> turn the main air valve on. Nothing happens except
for that
>> sound. Does anybody have a suggestion as to what I
could try
>> or look for to get the starter to work? I will try
leaving
>> the heater on for more than a few hours the next
time, but
>> in the meantime it would be interesting to find
out the
>> steps that happens (or should happen) internally
when the
>> start button is pushed? I have looked at the
schematics over
>> the air system, but it is a static view that
doesn't s!
>> eem to help me right now.
>>
>> Regards, Henrik
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=327870#327870
>>
>>
>>
>>
>>
>>
>>
>> Forum -
>> FAQ,
>> - MATRONICS WEB FORUMS -
>> List Contribution Web Site -
>> -Matt
>> Dralle, List Admin.
>>
>>
>>
>>
>
>
>
>
>
Forum -
FAQ,
- MATRONICS WEB FORUMS -
List Contribution Web Site -
-Matt
Dralle, List Admin.
|
| | - The Matronics Yak-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:
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radiopicture
Joined: 23 Jun 2008
Posts: 263
|
| Posted: Sat Jan 22, 2011 1:10 pm Post subject: Prop not turning |
|
|
Or it's frozen, right, Dennis?
On Jan 22, 2011, at 12:12 PM, A. Dennis Savarese wrote:
| Quote: |
Henrik,
The problem is the air start valve in front of your left foot on the back side of the firewall is sticking. You may try energizing the air start valve manually with the small tab on the right side of the valve. When you lift it, the air start valve is opened manually instead of electrically as is done when you press the start button. The only way to fix this problem is to remove the air start valve from the back side of the firewall and either replace it or possibly clean out the junk that has accumulated inside the plunger section.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (cell)
Skype: Yakguy1
www.yak-52.com
On 1/22/2011 8:01 AM, hammerhead wrote:
>
>
> Hello all. I am a fairly new owner of a Yak-52 and I don't have much experience with the internals of it yet. This is my first winter season. My plan was to fly regularly during the winter so I haven't done anything to conserve the engine during the cold, below 0 C, winter we get here in Scandinavia. Anyway, since the cold weather arrived I just can't get the starter to turn the prop. With the air on I push the starter, but all I hear is a humming, hizzing noise. I have heard this noise before once when I forgot to turn the main air valve on. Nothing happens except for that sound. Does anybody have a suggestion as to what I could try or look for to get the starter to work? I will try leaving the heater on for more than a few hours the next time, but in the meantime it would be interesting to find out the steps that happens (or should happen) internally when the start button is pushed? I have looked at the schematics over the air system, but it is a static view that doesn't
s!
> eem to help me right now.
>
> Regards, Henrik
>
>
>
>
> Read this topic online here:
>
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radiopicture
Joined: 23 Jun 2008
Posts: 263
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| Posted: Sat Jan 22, 2011 1:11 pm Post subject: Prop not turning |
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Ah... makes sense.
On Jan 22, 2011, at 12:14 PM, A. Dennis Savarese wrote:
| Quote: |
Eric,
You're correct about the buzzing. But the air start valve is hanging up. Easy to figure out by moving the little tab on the side of the air start valve to open the valve manually. Most likely this is the culprit and happens frequently in cold weather due to the gunk inside the valve the builds up over the years.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (cell)
Skype: Yakguy1
www.yak-52.com
On 1/22/2011 8:18 AM, Eric Wobschall wrote:
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>
> Henrik:
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> First, I'm assuming the engine is pre-heated to above 5 degrees C (preferably more like 12), and you've pulled the prop through, etc.
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> The buzzing is the shower of sparks. If you're not getting a "pop" noise before the hissing, then the air valve isn't opening for some reason. If you're not clearing out the snot valve after each flight, the mixture of glycerine, oil blow-by and condensate can freeze things in the air system. If the plane can be warmed in a hangar, I think I'd try that first.
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> -Eric
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> On Jan 22, 2011, at 9:01 AM, hammerhead wrote:
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>>
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>> Hello all. I am a fairly new owner of a Yak-52 and I don't have much experience with the internals of it yet. This is my first winter season. My plan was to fly regularly during the winter so I haven't done anything to conserve the engine during the cold, below 0 C, winter we get here in Scandinavia. Anyway, since the cold weather arrived I just can't get the starter to turn the prop. With the air on I push the starter, but all I hear is a humming, hizzing noise. I have heard this noise before once when I forgot to turn the main air valve on. Nothing happens except for that sound. Does anybody have a suggestion as to what I could try or look for to get the starter to work? I will try leaving the heater on for more than a few hours the next time, but in the meantime it would be interesting to find out the steps that happens (or should happen) internally when the start button is pushed? I have looked at the schematics over the air system, but it is a static view that doesn'
t!
> s!
>> eem to help me right now.
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>> Regards, Henrik
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>> http://forums.matronics.com/viewtopic.php?p=327870#327870
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hammerhead
Joined: 02 Oct 2010
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hammerhead
Joined: 02 Oct 2010
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| Posted: Sun Jan 23, 2011 3:22 am Post subject: Re: Prop not turning |
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By the way, Eric is mentioning a "snot valve". Where is this located, and how should it be operated?
| radiopicture wrote: | Henrik:
If you're not clearing out the snot valve after each flight, the mixture of glycerine, oil blow-by and condensate can freeze things in the air system. If the plane can be warmed in a hangar, I think I'd try that first.
-Eric
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http://forums.matronics.com/viewtopic.php?p=327870#327870
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radiopicture
Joined: 23 Jun 2008
Posts: 263
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| Posted: Sun Jan 23, 2011 5:14 am Post subject: Prop not turning |
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That is a knob on a small cylindrical apparatus on the firewall, low and on the right side. Opening that valve after each flight reduces the build-up of water, oil, etc. in the air system. I'm guessing if that isn't being blown off, that residue could be what's freezing in your starter valve. However, there have been many other suggestions in here by guys who would know since I made that remark. Just another thing to check.
On Jan 23, 2011, at 6:22 AM, hammerhead wrote:
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viperdoc(at)mindspring.co
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| Posted: Sun Jan 23, 2011 10:17 am Post subject: Prop not turning |
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On the left side of the firewall above the bottom engine mount when standing
in front of the left wing root. Reach in the left side of the cowl. On the
52, it is just above the base of the engine mount. It has a scalloped knob
on the left side of the snot valve. Rotating it counter clockwise opens it
draining the condensation from the previous flight so that it is not
injected into your air system when you start up the next time.
Doc
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hammerhead
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dsavarese0812(at)bellsout
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| Posted: Tue Feb 01, 2011 5:06 am Post subject: Prop not turning |
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The air start valve is located directly in front of the left rudder
pedal on the back side of the firewall. It's the vertical unit with the
small tab on the side and an electrical connector on the top. I've
attached a photo of it.
Dennis
On 2/1/2011 2:58 AM, hammerhead wrote:
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GeorgeCoy
Joined: 02 Dec 2010
Posts: 310
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| Posted: Tue Feb 01, 2011 6:42 am Post subject: Prop not turning |
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Some of the air start valves do not have the manual activation tab.
George Coy
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dsavarese0812(at)bellsout
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| Posted: Tue Feb 01, 2011 6:55 am Post subject: Prop not turning |
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You're right George. I forgot about that.
Dennis
On 2/1/2011 8:27 AM, George Coy wrote:
[quote]
Some of the air start valves do not have the manual activation tab.
George Coy
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jan.mevis(at)informavia.b
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| Posted: Tue Feb 01, 2011 7:06 am Post subject: Prop not turning |
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The original air start valve on my 50 did not have a manual tab. Would be
useless on a 50 anyway.
Jan
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