Today's Message Index:
----------------------
1. 12:08 AM - Re: Weak Air Compressor? (glipaz)
2. 12:57 AM - Re: V530 prop blades settings (ALEXGTPROPELLERS)
3. 06:47 AM - Re: Weak Air Compressor? (A. Dennis Savarese)
4. 07:56 AM - Re: Weak Air Compressor? (Greg Wrobel)
5. 08:11 AM - Re: Weak Air Compressor? (A. Dennis Savarese)
6. 08:13 AM - Re: Weak Air Compressor? (A. Dennis Savarese)
7. 09:02 AM - Re: Weak Air Compressor? (doug sapp)
8. 02:46 PM - Re: Weak Air Compressor? (Bitterlich, Mark G CIV NAVAIR, WD)
9. 09:52 PM - Yak-50 rust in air system / MLG actuator (apatton2)
10. 09:55 PM - Re: Intake tubage (apatton2)
11. 10:51 PM - Re: Weak Air Compressor? (Warren Hill)
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| Subject: | Re: Weak Air Compressor? |
Were you making over 30atm before? If not then maybe your pressure relief pop
off valve needs adjusting and is set too low. If you were making over 30atm
before and are not now then you are likely leaking air in the hard line from the
compressor to the snot bottle or the snot bottle itself is leaking air. The
banjo fitting on the compressor can leak. Try tightening it or replace the
crush washers on it and tighten. If not then the flares on the hard line coming
from the compressor might have a small crack and will leak. If not, then test
the fittings on the snot bottle and make sure the valve on the snot bottle
is not leaking. If it is the valve then disassemble and clean it or replace it
with a swagelock SS valve as has been described here before.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483089#483089
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| Subject: | Re: V530 prop blades settings |
In my experience 13 @ 1MT radius is fine.
Made one Saturday.
Depends if engine is in good shape, governor setting, hub blades bearings works
freely ecc .This with original russian blades sized 2.40.
With 2.50 GT blades we go @ same radius 15.
Normally we set to achieve 95/98% on ground @ full power.
Hope this can help
Ciao Alex
https://www.facebook.com/yakpropellerexpert/photos/pcb.574568489608108/574567526274871/?type=3&theater
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| Subject: | Re: Weak Air Compressor? |
Did you attempt to adjust the pressure relief valve on the firewall (Pop Of
f Valve) break-over pressure?=C2- It is adjustable.=C2- A "rule of thum
b" adjustment is 5 ATM's for each 1/2 turn.=C2- Adjust to 50-55 ATM's.Den
nis
From: twvandusen <twvandusen@gmail.com>
To: yak-list@matronics.com
Sent: Monday, September 10, 2018 10:02 PM
Subject: Yak-List: Weak Air Compressor?
After 14 months of working the problem, my Nanchang=C2- finally received
it's U.S. Airworthiness Certificate.=C2- We fixed several air leaks in a
recent annual inspection but during a recent runup I couldn't achieve the r
equired 30 ATMs for takeoff.=C2- The system still leaks some but it may a
lso be a weak air compressor.=C2- Is there a way to test the compressor?
=C2- What are the limits?=C2- Thanks everyone!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483084#483084
S -
WIKI -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 4
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| Subject: | Re: Weak Air Compressor? |
Another area to look at is the banjo fitting on the compressor. It has a
valve that can carbon up. Suggest you take off the banjo fitting and check
and clean the valve. Also when I did mine, I didn't get the crush washer
tight enough and had a small leak at the banjo fitting when I reinstalled
it. I tightened up the fitting and Wa-la..... air!
Greg Wrobel
On Mon, Sep 10, 2018, 21:04 twvandusen <twvandusen@gmail.com> wrote:
>
> After 14 months of working the problem, my Nanchang finally received it's
> U.S. Airworthiness Certificate. We fixed several air leaks in a recent
> annual inspection but during a recent runup I couldn't achieve the required
> 30 ATMs for takeoff. The system still leaks some but it may also be a weak
> air compressor. Is there a way to test the compressor? What are the
> limits? Thanks everyone!
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=483084#483084
>
>
Message 5
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| Subject: | Re: Weak Air Compressor? |
Another thing that is easy to do and can make a huge difference on how fast
the air tank will charge is to remove the "snot" bottle from the firewall
and flush it out completely either with avgas or mineral spirits.=C2- Fil
l the snot bottle with flushing liquid and shake well.=C2- Flush all thre
e orifices; input, output and drain.=C2- Once you see the flushing liquid
run clear out of all 3, dry it out with shop pressure and reinstall.=C2-
You'll be amazed how much faster your air bottle (or bottles if you have a
CJ) will charge.
Dennis
From: A. Dennis Savarese <dsavarese0812@bellsouth.net>
To: "yak-list@matronics.com" <yak-list@matronics.com>
Sent: Tuesday, September 11, 2018 9:51 AM
Subject: Re: Yak-List: Weak Air Compressor?
Did you attempt to adjust the pressure relief valve on the firewall (Pop Of
f Valve) break-over pressure?=C2- It is adjustable.=C2- A "rule of thum
b" adjustment is 5 ATM's for each 1/2 turn.=C2- Adjust to 50-55 ATM's.Den
nis
From: twvandusen <twvandusen@gmail.com>
To: yak-list@matronics.com
Sent: Monday, September 10, 2018 10:02 PM
Subject: Yak-List: Weak Air Compressor?
After 14 months of working the problem, my Nanchang=C2- finally received
it's U.S. Airworthiness Certificate.=C2- We fixed several air leaks in a
recent annual inspection but during a recent runup I couldn't achieve the r
equired 30 ATMs for takeoff.=C2- The system still leaks some but it may a
lso be a weak air compressor.=C2- Is there a way to test the compressor?
=C2- What are the limits?=C2- Thanks everyone!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483084#483084
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
http:p; =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2
- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
http://www.matronics.com/contribution
Message 6
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| Subject: | Re: Weak Air Compressor? |
Excellent point Greg.=C2- Especially about the crush washers.Dennis
From: Greg Wrobel <clouddog22@gmail.com>
To: yak-list@matronics.com
Sent: Tuesday, September 11, 2018 11:00 AM
Subject: Re: Yak-List: Weak Air Compressor?
Another area to look at is the banjo fitting on the compressor. It has a va
lve that can carbon up. Suggest you take off the banjo fitting and check an
d clean the valve. Also when I did mine, I didn't get the crush washer tigh
t enough and had a small leak at the banjo fitting when I reinstalled it. I
tightened up the fitting and Wa-la..... air!
Greg Wrobel
On Mon, Sep 10, 2018, 21:04 twvandusen <twvandusen@gmail.com> wrote:
After 14 months of working the problem, my Nanchang=C2- finally received
it's U.S. Airworthiness Certificate.=C2- We fixed several air leaks in a
recent annual inspection but during a recent runup I couldn't achieve the r
equired 30 ATMs for takeoff.=C2- The system still leaks some but it may a
lso be a weak air compressor.=C2- Is there a way to test the compressor?
=C2- What are the limits?=C2- Thanks everyone!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483084#483084
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| Subject: | Re: Weak Air Compressor? |
Weak compressor:
1. Check poppet valve *and seat* for carbon build up
2. Change out the poppet valve spring for a new one.
3. DO NOT try to reuse the banjo crush washers, order up a set of new.
4. Make 100% sure that your snot valve is fully closed (50% of the time
this is the problem)
5. Pressurize the line from snot valve to compressor banjo and check for
cracks or leaks
6. Don't think your doing it a favor by squirting WD-40 or MMM into the
filter, your not. It will just carbon up the poppet valve.
7. Give me a call and I'll loan you my KY2 compressor test kit.
Good luck,
Doug
On Tue, Sep 11, 2018 at 7:56 AM, Greg Wrobel <clouddog22@gmail.com> wrote:
> Another area to look at is the banjo fitting on the compressor. It has a
> valve that can carbon up. Suggest you take off the banjo fitting and check
> and clean the valve. Also when I did mine, I didn't get the crush washer
> tight enough and had a small leak at the banjo fitting when I reinstalled
> it. I tightened up the fitting and Wa-la..... air!
>
> Greg Wrobel
>
> On Mon, Sep 10, 2018, 21:04 twvandusen <twvandusen@gmail.com> wrote:
>
>>
>> After 14 months of working the problem, my Nanchang finally received
>> it's U.S. Airworthiness Certificate. We fixed several air leaks in a
>> recent annual inspection but during a recent runup I couldn't achieve the
>> required 30 ATMs for takeoff. The system still leaks some but it may also
>> be a weak air compressor. Is there a way to test the compressor? What are
>> the limits? Thanks everyone!
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=483084#483084
>>
>>
>>
>>
>>
>>
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>> -Matt Dralle, List Admin.
>> rel="noreferrer noreferrer" target="_blank">http://www.
>> matronics.com/contribution
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Message 8
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| Subject: | Re: Weak Air Compressor? |
Something that you will use more than once is a hose/line/fittings that allow you
to disconnect the line at the compressor and convert to standard AN fitting.
Then use any kind of compressed air, or nitrogen (never oxygen) and pump it
up to 700 psi and listen for leaks. You'll find them. If you have none, suspect
compressor or check valve in the banjo fitting.
________________________________
From: owner-yak-list-server@matronics.com [owner-yak-list-server@matronics.com]
on behalf of A. Dennis Savarese [dsavarese0812@bellsouth.net]
Sent: Tuesday, September 11, 2018 9:47 AM
Subject: [Non-DoD Source] Re: Yak-List: Weak Air Compressor?
Did you attempt to adjust the pressure relief valve on the firewall (Pop Off Valve)
break-over pressure? It is adjustable. A "rule of thumb" adjustment is
5 ATM's for each 1/2 turn. Adjust to 50-55 ATM's.
Dennis
________________________________
From: twvandusen <twvandusen@gmail.com>
Sent: Monday, September 10, 2018 10:02 PM
Subject: Yak-List: Weak Air Compressor?
After 14 months of working the problem, my Nanchang finally received it's U.S.
Airworthiness Certificate. We fixed several air leaks in a recent annual inspection
but during a recent runup I couldn't achieve the required 30 ATMs for
takeoff. The system still leaks some but it may also be a weak air compressor.
Is there a way to test the compressor? What are the limits? Thanks everyone!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483084#483084
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
http:p; -Matt Dralle, List Admin.
http://www.matronics.com/contribution
Message 9
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| Subject: | Yak-50 rust in air system / MLG actuator |
Hi List,
Awhile back I wrote the list mentioning that there was rust-colored dust coming
out of my landing gear selector valve handle.
The (relative) good news is that we've located the rust in a rusty actuator. Which
leads me to 2 questions:
1) Does anyone sell replacement parts for the Yak-50 MLG actuator? We believe the
rusted part is repairable but if a spare were available that's probably an
easier solution. I have pics of the parts that I can provide if needed.
2) As the rusty dust has traveled from the MLG actuator all the way through the
selector valve, there's some level of dust contamination in the system. Are there
any recommendations on what to use to clean the air system out? Or is this
not recommended?
Many thanks for any wisdom,
Andrew
--------
Andrew Patton
Yak-50
San Francisco, CA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483129#483129
Message 10
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| Subject: | Re: Intake tubage |
If I understand you correctly... when I did this, it was really difficult to align
the upper end of the tube into the core. What ended up working was connecting
the bottom connection to the cylinder when we were close... that lined the
top up and the glan nut spun on.
--------
Andrew Patton
Yak-50
San Francisco, CA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=483130#483130
Message 11
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| Subject: | Re: Weak Air Compressor? |
Another way to find leaks is to use a hand held ultrasonic leak
detector. We have four CJs in one hangar and this piece of equipment is
shared by everyone. It=99s capable of uncovering even the smallest
leak. And a large leak sounds like a hurricane. Here's an image of what
we use. Worth every penny when a pneumatic system starts acting up and
the cause is not obvious. These are available on Amazon.
Warren Hill
N464TW
Mesa, AZ
> On Sep 11, 2018, at 7:56 AM, Greg Wrobel <clouddog22@gmail.com> wrote:
>
> Another area to look at is the banjo fitting on the compressor. It has
a valve that can carbon up. Suggest you take off the banjo fitting and
check and clean the valve. Also when I did mine, I didn't get the crush
washer tight enough and had a small leak at the banjo fitting when I
reinstalled it. I tightened up the fitting and Wa-la..... air!
>
> Greg Wrobel
>
> On Mon, Sep 10, 2018, 21:04 twvandusen <twvandusen@gmail.com
<mailto:twvandusen@gmail.com>> wrote:
<mailto:twvandusen@gmail.com>>
>
> After 14 months of working the problem, my Nanchang finally received
it's U.S. Airworthiness Certificate. We fixed several air leaks in a
recent annual inspection but during a recent runup I couldn't achieve
the required 30 ATMs for takeoff. The system still leaks some but it
may also be a weak air compressor. Is there a way to test the
compressor? What are the limits? Thanks everyone!
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=483084#483084
<http://forums.matronics.com/viewtopic.php?p=483084#483084>
>
>
>
>
>
>
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