Today's Message Index:
----------------------
1. 05:57 AM - Air start (HBaker)
2. 06:27 AM - Re: Air start (George Coy)
3. 01:59 PM - Re: Air start (Yak Pilot)
Message 1
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I' m hooking up the air start an was wondering about the water trap and the solonoids
Is there three of these , one on the air start, one on the Isolaion valve
and one on the water trap, are you hooking up the water trap with some kind
of a colection ,loop or container before the valve? And 2 of the the valves
are normally closed and one open?
--------
Currently building a Murphy Moose - any help would be appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=229191#229191
Message 2
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Usually you exit the air compressor with some steel line. Put a loop or two
in it for vibration isolation and some cooling to condense the water and oil
vapors. It then goes to the water trap. From the water trap it usually goes
to the air system through a check valve. The pressure bottle is usually
isolated with a manual valve so you do not loose pressure while the aircraft
is parked. The start valve is hooked to the system and is either
electrically or mechanically activated. The electrical valves can have some
problems as they sometimes gum up with the oil residues that are in the air
system. Many of the eastern aircraft used a mechanical valve. This had the
advantage that once thrown it left both hands free to work throttle, primer
magi switches etc.
If you go to the instillation section of the M14P engines on our website at
motorstarna.com you will see a sample system schematic. There may also be
some other useful information there as well.
George Coy
Motorstar NA
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
george.coy@gmail.com
SKYPE george.coy
motorstarna.com
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of HBaker
Sent: Sunday, February 08, 2009 8:57 AM
Subject: M14PEngines-List: Air start
--> <henry.baker@nf.sympatico.ca>
I' m hooking up the air start an was wondering about the water trap and the
solonoids Is there three of these , one on the air start, one on the
Isolaion valve and one on the water trap, are you hooking up the water trap
with some kind of a colection ,loop or container before the valve? And 2 of
the the valves are normally closed and one open?
--------
Currently building a Murphy Moose - any help would be appreciated.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=229191#229191
Message 3
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A comment on design if I may.- The original Yak design used a steel line
with loops in it as George described.- With later models, they used a ste
el line, a few loops and then a steel braided line connected to the end of
it which then connected to the water trap.- =0A-=0ASukhoi designs simpl
y used a braided high pressure steel line and never bothered with the hard
steel line (loops or no loops).- =0A-=0AMy YAK-50, plus two YAK-52=92s
that I know about have had problems when using a solid steel line, with the
loops, connecting straight to the water trap (snot valve).- The reason i
s fairly obvious.- The engine moves in it=92s shock mounts (rubbers).-
The snot valve is connected to the firewall.- As the engine vibrates, thi
s steel line has to flex and move with it.- Over time, it is going to fai
l.- =0A-=0ABottom line, in my humble opinion, lose the steel line and r
eplace it with a steel braided flex line.- Or=85use the steel line, but h
ave a piece of braided flexible line between the steel line and the snot va
lve.- On mine I managed to get the =0A-=0AThere are two models of start
valves.- One has manual capability, one does not.- If you can find an
old one that does not work, you can take the new model and steal the parts
out of it to repair an old one so you do have manual capability, which is a
very good thing to have as George points out.- =0AMark Bitterlich=0A=0A
=0A=0A=0A________________________________=0AFrom: George Coy <george@gesoco
.com>=0ATo: m14pengines-list@matronics.com=0ASent: Sunday, February 8, 2009
9:25:58 AM=0ASubject: RE: M14PEngines-List: Air start=0A=0A--> M14PEngines
-List message posted by: "George Coy" <george@gesoco.com>=0A=0AUsually you
exit the air compressor with some steel line. Put a loop or two=0Ain it for
vibration isolation and some cooling to condense the water and oil=0Avapor
s. It then goes to the water trap. From the water trap it usually goes=0Ato
the air system through a check valve. The pressure bottle is usually=0Aiso
lated with a manual valve so you do not loose pressure while the aircraft
=0Ais parked. The start valve is hooked to the system and is either=0Aelect
rically or mechanically activated. The electrical valves can have some=0Apr
oblems as they sometimes gum up with the oil residues that are in the air
=0Asystem. Many of the eastern aircraft used a mechanical valve. This had t
he=0Aadvantage that once thrown it left both hands free to work throttle, p
rimer=0Amagi switches etc.=0A=0AIf you go to the instillation section of th
e M14P engines on our website at=0Amotorstarna.com- you will see a sample
system schematic. There may also be=0Asome other useful information there
as well. =0A=0A=0AGeorge Coy=0A=0AMotorstar NA=0A714 Airport Rd.=0ASwanton
VT 05488=0A802-868-5633 off=0A802-363-5782 cell=0Ageorge.coy@gmail.com=0ASK
YPE george.coy=0Amotorstarna.com=0A=0A-----Original Message-----=0AFrom: ow
ner-m14pengines-list-server@matronics.com=0A[mailto:owner-m14pengines-list-
server@matronics.com] On Behalf Of HBaker=0ASent: Sunday, February 08, 2009
8:57 AM=0ATo: m14pengines-list@matronics.com=0ASubject: M14PEngines-List:
ry.baker@nf.sympatico.ca>=0A=0AI' m hooking up the air start an was wonderi
ng about the water trap and the=0Asolonoids Is there three of these , one o
n the air start, one on the=0AIsolaion valve and one on the water trap, are
you hooking up the water trap=0Awith some kind of a colection ,loop or con
tainer before the valve? And- 2 of=0Athe the valves are normally closed a
nd one open?=0A=0A--------=0ACurrently building a Murphy Moose - any help w
ould be appreciated.=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp:/
/forums.matronics.com/viewtopic.php?p=229191#229191=0A=0A=0A=0A=0A=0A=0A
=========================0A
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