Today's Message Index:
----------------------
1. 02:55 PM - compressor (robert de vries)
2. 03:53 PM - Re: compressor (Wes Warner)
3. 04:15 PM - Re: compressor (A. Dennis Savarese)
4. 04:24 PM - Re: mags vs. mixture cutoff (Brian Lloyd)
5. 04:34 PM - Re: compressor (Coffey, John)
6. 06:28 PM - compressor problems (joe h)
7. 07:58 PM - Re: compressor (Walt Lannon)
8. 08:33 PM - Painting the motor (Frank Haertlein)
9. 09:28 PM - 9/11 (YakL1@aol.com)
Message 1
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--> Yak-List message posted by: robert de vries <redyak52@compuserve.com>
Hello there,
Although posted in previous editions,I would like the latest insights on
this subject from all of you:
Two weeks ago I thought I noticed the compressor not completely recharging
the main air system with 50+bar.
Topped off with scuba dive tank,popoff releve valve worked fine at 55
bar,no problem.
Last week again flying, definite no charge above 35 bar, after flight HAD
to use scuba tank.
Tichtened all fittings in cowling slightly, did not solve the problem.
After flight only small amout of water/air from water seperator valve (snot
valve).
So it looks like compressor is charging; however not over 30 bar.
Maybe air is leaking somewhere before entering system/water seperator.
Found after week that air stays in tanks fine after closing main valve in
front cockpit,no leaks there;seems to be problem in front of fire wall???
Any suggestions how to fix this problem?
Where to look first?
What to replace?
Easy fixes first please!!
Thanks,
Robert,
The Netherlands
www.redyak.tk
Message 2
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Mail-Followup-To: Wes Warner <ufo@outerlimits.org>,
--> Yak-List message posted by: Wes Warner <ufo@outerlimits.org>
Robert,
I had a similar issue about a year ago. I had my compressor rebuilt
by Carl Hays, and now it's a charging fool.
HTH,
Wes
On Thu, Sep 11, 2003 at 05:54:22PM -0400, robert de vries wrote:
> --> Yak-List message posted by: robert de vries <redyak52@compuserve.com>
>
> Hello there,
> Although posted in previous editions,I would like the latest insights on
> this subject from all of you:
>
> Two weeks ago I thought I noticed the compressor not completely recharging
> the main air system with 50+bar.
> Topped off with scuba dive tank,popoff releve valve worked fine at 55
> bar,no problem.
> Last week again flying, definite no charge above 35 bar, after flight HAD
> to use scuba tank.
> Tichtened all fittings in cowling slightly, did not solve the problem.
> After flight only small amout of water/air from water seperator valve (snot
> valve).
> So it looks like compressor is charging; however not over 30 bar.
> Maybe air is leaking somewhere before entering system/water seperator.
> Found after week that air stays in tanks fine after closing main valve in
> front cockpit,no leaks there;seems to be problem in front of fire wall???
>
> Any suggestions how to fix this problem?
> Where to look first?
> What to replace?
> Easy fixes first please!!
>
> Thanks,
> Robert,
> The Netherlands
> www.redyak.tk
>
--
My girl's insane... But it's alright.
Message 3
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--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Robert,
You probably should remove the output check valve on the compressor where it
mates with the banjo fitting and clean it thoroughly. They typically carbon
up severely and when carboned up, will give you that symptom. If you let it
go too long, the backpressure will cause the sheer coupling on the
compressor to sheer and now you'll have a fun job ahead of you.
Dennis Savarese
----- Original Message -----
From: "robert de vries" <redyak52@compuserve.com>
Subject: Yak-List: compressor
> --> Yak-List message posted by: robert de vries <redyak52@compuserve.com>
>
> Hello there,
> Although posted in previous editions,I would like the latest insights on
> this subject from all of you:
>
> Two weeks ago I thought I noticed the compressor not completely recharging
> the main air system with 50+bar.
> Topped off with scuba dive tank,popoff releve valve worked fine at 55
> bar,no problem.
> Last week again flying, definite no charge above 35 bar, after flight HAD
> to use scuba tank.
> Tichtened all fittings in cowling slightly, did not solve the problem.
> After flight only small amout of water/air from water seperator valve
(snot
> valve).
> So it looks like compressor is charging; however not over 30 bar.
> Maybe air is leaking somewhere before entering system/water seperator.
> Found after week that air stays in tanks fine after closing main valve in
> front cockpit,no leaks there;seems to be problem in front of fire wall???
>
> Any suggestions how to fix this problem?
> Where to look first?
> What to replace?
> Easy fixes first please!!
>
> Thanks,
> Robert,
> The Netherlands
> www.redyak.tk
>
>
Message 4
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| Subject: | Re: mags vs. mixture cutoff |
--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Jon Boede wrote:
> --> Yak-List message posted by: "Jon Boede" <jon@email.net>
>
> What are the arguments for using the fuel cutoff vs. using the mags to
> shut down a radial engine?
Both techniques work. Cutting off the mixture makes the engine less likely to
start if the prop is moved.
> When I first got my CJ I picked up a copy of the Radial Engine Handbook
> and I recall that it said to use the mags but I don't recall the
> specifics; I've been using the mags ever since.
That is because there is no ICO on the CJ's carb.
> Seeing a bit of black smoke puffing at 600rpm, which I take to mean that
> it's a bit rich at idle. Or it could just be the 3,000' density altitude
> of August in Texas. Anybody have a rule of thumb for deciding when to
> adjust the idle mixture?
I just lean the mixture until the engine runs smoothly.
> This all came up in a discussion of what the momentary rpm rise was when I
> shut down the engine with the mixture... a B-25 guy suggested that more
> than 100 rpm or so meant that I was probably running too rich at idle.
That is correct.
When the engine is idling try leaning the mixture to find the point where it idles
most smoothly. I found that mine ran best with the mixture almost all the
way lean. Just remember to richen the mixture before you open the throttle to
take-off.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
GMT-4
Message 5
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--> Yak-List message posted by: "Coffey, John" <john.coffey@attws.com>
Robert,
Have you cleaned the compressor's high-pressure outlet valve lately?
A gunked up outlet valve is probably the most common reason for a
compressor that's not pumping like it should.
The outlet valve assembly unscrews entirely from the compressor, and
then can be totally dissassembled by unscrewing it's component parts
from each other. It's very low tech and mechanically simple. It's likely
that you'll need to replace the aluminum crush washers that seal the
banjo fitting and each section of the outlet valve. The 10mm ID washers
that go on either side of the banjo fitting are the most likely to need
replacement. There are several larger diameter one's that may need to be
replaced too.
Most BMW motorcycle dealer parts departments will carry a selection of
aluminum crush washers that'll do the job.
Good luck,
John Coffey
Yak-55m Lover
-----Original Message-----
From: robert de vries [mailto:redyak52@compuserve.com]
Subject: Yak-List: compressor
--> Yak-List message posted by: robert de vries
<redyak52@compuserve.com>
Hello there,
Although posted in previous editions,I would like the latest insights on
this subject from all of you:
Two weeks ago I thought I noticed the compressor not completely
recharging
the main air system with 50+bar.
Topped off with scuba dive tank,popoff releve valve worked fine at 55
bar,no problem.
Last week again flying, definite no charge above 35 bar, after flight
HAD
to use scuba tank.
Tichtened all fittings in cowling slightly, did not solve the problem.
After flight only small amout of water/air from water seperator valve
(snot
valve).
So it looks like compressor is charging; however not over 30 bar.
Maybe air is leaking somewhere before entering system/water seperator.
Found after week that air stays in tanks fine after closing main valve
in
front cockpit,no leaks there;seems to be problem in front of fire
wall???
Any suggestions how to fix this problem?
Where to look first?
What to replace?
Easy fixes first please!!
Thanks,
Robert,
The Netherlands
www.redyak.tk
Message 6
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| Subject: | compressor problems |
--> Yak-List message posted by: joe h <joeh@shaw.ca>
The solid line leading from the compressor will plug up with carbon, if it will
not clear by blowing out with air
try tapping it lightly while resting it on something solid (anvil or vise) not
hard enough to damage the line.
Joe
Message 7
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tests=MAILTO_TO_SPAM_ADDR,NO_COST,ORIGINAL_MESSAGE,
QUOTED_EMAIL_TEXT,REFERENCES,USER_IN_WHITELIST
version=2.55
--> Yak-List message posted by: "Walt Lannon" <lannon@look.ca>
Hi Robert;
As Dennis suggested you should remove and clean the output check valve. You
should also test the entire charge circuit from the compressor to the
non-return check valve supplying the operating system. This includes the
pipelines, snot valve, water filter and pressure relief valve.
I am refering to the CJ6 here, there may be some difference on the 52 but it
should be basically the same.
A relatively small leak will cause the problem you describe.
Pressurize the system with an external supply of approx. 40 ATM. from the
pipeline connection you have removed from the compressor. I suspect you will
find a leak. After that is done, the system is leaf free and the output
valve re-installed, pressurize from the other end to check the output valve.
It should hold with no loss of pressure.
Good Luck;
Walt.
----- Original Message -----
From: "robert de vries" <redyak52@compuserve.com>
Subject: Yak-List: compressor
> --> Yak-List message posted by: robert de vries <redyak52@compuserve.com>
>
> Hello there,
> Although posted in previous editions,I would like the latest insights on
> this subject from all of you:
>
> Two weeks ago I thought I noticed the compressor not completely recharging
> the main air system with 50+bar.
> Topped off with scuba dive tank,popoff releve valve worked fine at 55
> bar,no problem.
> Last week again flying, definite no charge above 35 bar, after flight HAD
> to use scuba tank.
> Tichtened all fittings in cowling slightly, did not solve the problem.
> After flight only small amout of water/air from water seperator valve
(snot
> valve).
> So it looks like compressor is charging; however not over 30 bar.
> Maybe air is leaking somewhere before entering system/water seperator.
> Found after week that air stays in tanks fine after closing main valve in
> front cockpit,no leaks there;seems to be problem in front of fire wall???
>
> Any suggestions how to fix this problem?
> Where to look first?
> What to replace?
> Easy fixes first please!!
>
> Thanks,
> Robert,
> The Netherlands
> www.redyak.tk
>
>
Message 8
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| Subject: | Painting the motor |
--> Yak-List message posted by: "Frank Haertlein" <yak52driver@earthlink.net>
Yaksters;
Another 52 pilot is getting ready to paint his motor but is unsure of
the type of paint to use on the cylinders. He's worried about heat
transfer from painted cylinders. Any suggestions, ideas?
Thanks in advance.
Frank
N9110M
Message 9
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--> Yak-List message posted by: YakL1@aol.com
Dear Friends:
Worked a pretty long, pretty hard day. All the usual stuff. Wrote "9/11"
over and over. Then had dinner with some aviation friends. First toast:
"9/11--New York".
Kinda makes ya think.
The day is nearly over, but it's not too late to take a moment and remember
our countrymen in the towers, in Washington, and those forcing their way into a
hijacked cockpit. Remember them, heroes and victims, slaughtered
impersonally only because they were Americans. Say a little prayer for the families
they
left behind.
Happy Anniversary.
John
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