Today's Message Index:
----------------------
1. 01:28 AM - Re: M-14P Air pump (Richard Goode)
2. 07:37 AM - CJ down in Michigan (Fly4fude)
3. 07:45 AM - Re: M-14P Air pump (Todd McCutchan)
4. 08:08 AM - Re: JN Trading (FamilyGage@aol.com)
5. 08:47 AM - Re: M-14P Air pump (Richard Goode)
6. 11:37 AM - Re: CJ down in Michigan (Bill Geipel)
7. 11:40 AM - Re: Airshow : Yak-52 Aerobatic Display. (Etienne Verhellen)
8. 01:48 PM - Re: WTB CJ Attitude Indicator (keithmckinley)
9. 07:13 PM - Re: M-14P Air pump (Jim Burke)
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Obviously the power required for the compressor depends on the pressure.
But if it is at high pressure =93 that is normal operating
pressure, when the pressure-release valve blows off and then a little
later the compressor starts working again that is all at high pressure,
when it uses about 2.5 hp, so not really noticeable.
But the opening of the release valve does not allow the compressor to
work off load =93 it has released some pressure, which makes the
compressor then work again to build up the pressure in a continuing
cycle!
But the real advantage of opening a "dump-valve" is that the compressor
then runs off-load for most of the time. In our experience the
compressors are a weak part of these engines, and very often do not
reach the engine TBO, but if running off-load, they will last
indefinitely.
There is also a side advantage that if the compressor is not
continuously working, it's not then putting some atmospheric water into
the air system. Of course this shouldn't happen, but many people don't
release the water drain sufficiently often, and so it goes quite a long
way to prevent this problem.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 20 April 2014 02:52
Subject: Yak-List: M-14P Air pump
How much HP difference is there between a "loaded" and "unloaded" air
compressor on the M-14P?
I have heard of guys putting in a manual "bypass" dumping air from the
compressor overboard to "unload" the compressor for more HP.
I would think this is both
A) minimal increase in HP (1 - 2 HP?)
And
B) once your air is "topped off" doesn't the pressure relief valve or
"pop off" valve open and perform the exact same function?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
On Apr 19, 2014, at 6:24 PM, "A. Dennis Savarese"
<dsavarese0812@bellsouth.net> wrote:
The pop off (pressure RELIEF) valve is controlled by spring tension.
The tighter you make the "top hat" (turn it clockwise), the higher the
pressure goes. When the pressure reaches the preset spring pressure,
the valve opens. The hiss is the pressure relief which stops when the
pop off valve closes. This is perfectly normal. It's just like the
pressure relief valve on a shop compressor. If the pressure in the
compressor exceeds the pressure relief valve preset pressure, the valve
opens and "dumps" the excess pressure.
Dennis
_____
From: Jim Shanks <shankeroid@verizon.net>
Sent: Saturday, April 19, 2014 10:21 AM
Subject: Yak-List: Hissing Pop-Off Valve
When servicing the air system on our stock CJ, the pop-off valve begins
=9Chissing=9D at around 32 ATM and
=9Cpops-off=9D at around 38 ATM (not allowing system to be
pressurized any higher.) After popping off and servicing discontinued,
hissing will continue (slowly diminishing) until pressure settles at
around 32 ATM. Although probably plenty for a few start attempts, I
want to fix the problem and have the full 50 ATM available.
I know the valve is adjustable, but is the hissing a separate problem
that needs to be addressed? Also, what specifically is causing the
valve to hiss?
Thanks.
Jim Shanks
shankeroid@verizon.net
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| Subject: | CJ down in Michigan |
http://www.mlive.com/news/flint/index.ssf/2014/04/two_men_dead_following_plane_a.html
--------
Scott "Gabby" Wallace
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422155#422155
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| Subject: | Re: M-14P Air pump |
I see. Thanks for the education Richard!
What is the best way to dump then? Just put a line to the snot valve from th
e cockpit?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
> On Apr 20, 2014, at 1:27 AM, "Richard Goode" <richard.goode@russianaeros.c
om> wrote:
>
> Obviously the power required for the compressor depends on the pressure. B
ut if it is at high pressure =93 that is normal operating pressure, wh
en the pressure-release valve blows off and then a little later the compress
or starts working again that is all at high pressure, when it uses about 2.5
hp, so not really noticeable.
>
> But the opening of the release valve does not allow the compressor to work
off load =93 it has released some pressure, which makes the compresso
r then work again to build up the pressure in a continuing cycle!
>
> But the real advantage of opening a "dump-valve" is that the compressor th
en runs off-load for most of the time. In our experience the compressors are
a weak part of these engines, and very often do not reach the engine TBO, b
ut if running off-load, they will last indefinitely.
>
> There is also a side advantage that if the compressor is not continuously w
orking, it's not then putting some atmospheric water into the air system. Of
course this shouldn't happen, but many people don't release the water drain
sufficiently often, and so it goes quite a long way to prevent this problem
.
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Todd McCutchan
> Sent: 20 April 2014 02:52
> To: yak-list@matronics.com
> Subject: Yak-List: M-14P Air pump
>
> How much HP difference is there between a "loaded" and "unloaded" air comp
ressor on the M-14P?
>
> I have heard of guys putting in a manual "bypass" dumping air from the com
pressor overboard to "unload" the compressor for more HP.
>
> I would think this is both
>
> A) minimal increase in HP (1 - 2 HP?)
>
> And
>
> B) once your air is "topped off" doesn't the pressure relief valve or "pop
off" valve open and perform the exact same function?
>
> Todd McCutchan
> T-34A & Yak-50
> Cell: (260) 402-1740
> E-mail: todd@fastaircraft.com
> www.fastaircraft.com
>
>
>
> On Apr 19, 2014, at 6:24 PM, "A. Dennis Savarese" <dsavarese0812@bellsouth
.net> wrote:
>
> The pop off (pressure RELIEF) valve is controlled by spring tension. The t
ighter you make the "top hat" (turn it clockwise), the higher the pressure g
oes. When the pressure reaches the preset spring pressure, the valve opens.
The hiss is the pressure relief which stops when the pop off valve closes.
This is perfectly normal. It's just like the pressure relief valve on a s
hop compressor. If the pressure in the compressor exceeds the pressure reli
ef valve preset pressure, the valve opens and "dumps" the excess pressure.
> Dennis
>
>
>
> From: Jim Shanks <shankeroid@verizon.net>
> To: yak-list@matronics.com
> Sent: Saturday, April 19, 2014 10:21 AM
> Subject: Yak-List: Hissing Pop-Off Valve
>
>
> When servicing the air system on our stock CJ, the pop-off valve begins
=9Chissing=9D at around 32 ATM and =9Cpops-off=9D at ar
ound 38 ATM (not allowing system to be pressurized any higher.) After poppi
ng off and servicing discontinued, hissing will continue (slowly diminishing
) until pressure settles at around 32 ATM. Although probably plenty for a f
ew start attempts, I want to fix the problem and have the full 50 ATM availa
ble.
>
> I know the valve is adjustable, but is the hissing a separate problem th
at needs to be addressed? Also, what specifically is causing the valve to h
iss?
>
> Thanks.
>
> Jim Shanks
> shankeroid@verizon.net
>
> http://ww"nofollow" target="_blank" href="http://forums.matronics.com/
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>
>
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Sorry Ernie, never have had any dealings with.
Ray Gage
In a message dated 4/18/2014 11:06:54 A.M. Eastern Daylight Time,
erniel29@gmail.com writes:
Has anyone done business with Andrew Zeng from JN Trading? I remember many
opinions shared years ago, but would appreciate any recent updates.
Thanks
Ernie
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There are different solutions. Some have an electric (solenoid) valve;
you can have an actuating cable operating the tap. However, for a simple
aerobatic aircraft I prefer to bring the valve into the cockpit into an
accessible position =93 but typically underneath the
pilot=99s leg =93 so it is totally positive; you know when
it is on and off and no possibility of electrical or control problems.
So you open it once the pressure has built up after starting, and then
it is clearly important to shut the valve before landing to ensure you
have a pressure for undercarriage; brakes etc, and of course that you
will have built up pressure for the next start.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 20 April 2014 15:24
Subject: Re: Yak-List: M-14P Air pump
I see. Thanks for the education Richard!
What is the best way to dump then? Just put a line to the snot valve
from the cockpit?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
On Apr 20, 2014, at 1:27 AM, "Richard Goode"
<richard.goode@russianaeros.com> wrote:
Obviously the power required for the compressor depends on the pressure.
But if it is at high pressure =93 that is normal operating
pressure, when the pressure-release valve blows off and then a little
later the compressor starts working again that is all at high pressure,
when it uses about 2.5 hp, so not really noticeable.
But the opening of the release valve does not allow the compressor to
work off load =93 it has released some pressure, which makes the
compressor then work again to build up the pressure in a continuing
cycle!
But the real advantage of opening a "dump-valve" is that the compressor
then runs off-load for most of the time. In our experience the
compressors are a weak part of these engines, and very often do not
reach the engine TBO, but if running off-load, they will last
indefinitely.
There is also a side advantage that if the compressor is not
continuously working, it's not then putting some atmospheric water into
the air system. Of course this shouldn't happen, but many people don't
release the water drain sufficiently often, and so it goes quite a long
way to prevent this problem.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 20 April 2014 02:52
Subject: Yak-List: M-14P Air pump
How much HP difference is there between a "loaded" and "unloaded" air
compressor on the M-14P?
I have heard of guys putting in a manual "bypass" dumping air from the
compressor overboard to "unload" the compressor for more HP.
I would think this is both
A) minimal increase in HP (1 - 2 HP?)
And
B) once your air is "topped off" doesn't the pressure relief valve or
"pop off" valve open and perform the exact same function?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
On Apr 19, 2014, at 6:24 PM, "A. Dennis Savarese"
<dsavarese0812@bellsouth.net> wrote:
The pop off (pressure RELIEF) valve is controlled by spring tension.
The tighter you make the "top hat" (turn it clockwise), the higher the
pressure goes. When the pressure reaches the preset spring pressure,
the valve opens. The hiss is the pressure relief which stops when the
pop off valve closes. This is perfectly normal. It's just like the
pressure relief valve on a shop compressor. If the pressure in the
compressor exceeds the pressure relief valve preset pressure, the valve
opens and "dumps" the excess pressure.
Dennis
_____
From: Jim Shanks <shankeroid@verizon.net>
Sent: Saturday, April 19, 2014 10:21 AM
Subject: Yak-List: Hissing Pop-Off Valve
When servicing the air system on our stock CJ, the pop-off valve begins
=9Chissing=9D at around 32 ATM and
=9Cpops-off=9D at around 38 ATM (not allowing system to be
pressurized any higher.) After popping off and servicing discontinued,
hissing will continue (slowly diminishing) until pressure settles at
around 32 ATM. Although probably plenty for a few start attempts, I
want to fix the problem and have the full 50 ATM available.
I know the valve is adjustable, but is the hissing a separate problem
that needs to be addressed? Also, what specifically is causing the
valve to hiss?
Thanks.
Jim Shanks
shankeroid@verizon.net
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Message 6
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| Subject: | Re: CJ down in Michigan |
Do we know them?
On Apr 20, 2014, at 8:36, "Fly4fude" <sjdwallace@verizon.net> wrote:
>
> http://www.mlive.com/news/flint/index.ssf/2014/04/two_men_dead_following_plane_a.html
>
> --------
> Scott "Gabby" Wallace
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=422155#422155
>
>
>
>
>
>
>
>
>
>
Message 7
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| Subject: | Re: Airshow : Yak-52 Aerobatic Display. |
A few pics just received from my friend Gert (G-SPOT) Trachez :
http://imageshack.com/a/img836/8919/59va.jpg
http://imageshack.com/a/img62/9130/3dv0.jpg
http://imageshack.com/a/img850/9167/9c17.jpg
http://imageshack.com/a/img836/4119/ewvr.jpg
http://imageshack.com/a/img842/4073/8cv6.jpg
http://imageshack.com/a/img836/2030/b692.jpg
http://imageshack.com/a/img841/4278/ro55.jpg
http://imageshack.com/a/img838/3658/x46r.jpg
http://imageshack.com/a/img836/9347/n18l.jpg
http://imageshack.com/a/img838/3300/qr7z.jpg
http://imageshack.com/a/img834/8264/slz8.jpg
http://imageshack.com/a/img843/3656/uvbh.jpg
http://imageshack.com/a/img843/805/unmy.jpg
http://imageshack.com/a/img843/4136/dgah.jpg
Happy Easter.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422165#422165
Message 8
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| Subject: | Re: WTB CJ Attitude Indicator |
pm me
--------
Keith McKinley
700HS
X26 Sebastian, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422167#422167
Message 9
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| Subject: | Re: M-14P Air pump |
Who makes a 1/4 turn dump valve
Sent from my iPad
> On Apr 20, 2014, at 4:27, "Richard Goode" <richard.goode@russianaeros.com>
wrote:
>
> Obviously the power required for the compressor depends on the pressure. B
ut if it is at high pressure =93 that is normal operating pressure, wh
en the pressure-release valve blows off and then a little later the compress
or starts working again that is all at high pressure, when it uses about 2.5
hp, so not really noticeable.
>
> But the opening of the release valve does not allow the compressor to work
off load =93 it has released some pressure, which makes the compresso
r then work again to build up the pressure in a continuing cycle!
>
> But the real advantage of opening a "dump-valve" is that the compressor th
en runs off-load for most of the time. In our experience the compressors are
a weak part of these engines, and very often do not reach the engine TBO, b
ut if running off-load, they will last indefinitely.
>
> There is also a side advantage that if the compressor is not continuously w
orking, it's not then putting some atmospheric water into the air system. Of
course this shouldn't happen, but many people don't release the water drain
sufficiently often, and so it goes quite a long way to prevent this problem
.
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Todd McCutchan
> Sent: 20 April 2014 02:52
> To: yak-list@matronics.com
> Subject: Yak-List: M-14P Air pump
>
> How much HP difference is there between a "loaded" and "unloaded" air comp
ressor on the M-14P?
>
> I have heard of guys putting in a manual "bypass" dumping air from the com
pressor overboard to "unload" the compressor for more HP.
>
> I would think this is both
>
> A) minimal increase in HP (1 - 2 HP?)
>
> And
>
> B) once your air is "topped off" doesn't the pressure relief valve or "pop
off" valve open and perform the exact same function?
>
> Todd McCutchan
> T-34A & Yak-50
> Cell: (260) 402-1740
> E-mail: todd@fastaircraft.com
> www.fastaircraft.com
>
>
>
> On Apr 19, 2014, at 6:24 PM, "A. Dennis Savarese" <dsavarese0812@bellsouth
.net> wrote:
>
> The pop off (pressure RELIEF) valve is controlled by spring tension. The t
ighter you make the "top hat" (turn it clockwise), the higher the pressure g
oes. When the pressure reaches the preset spring pressure, the valve opens.
The hiss is the pressure relief which stops when the pop off valve closes.
This is perfectly normal. It's just like the pressure relief valve on a s
hop compressor. If the pressure in the compressor exceeds the pressure reli
ef valve preset pressure, the valve opens and "dumps" the excess pressure.
> Dennis
>
>
>
> From: Jim Shanks <shankeroid@verizon.net>
> To: yak-list@matronics.com
> Sent: Saturday, April 19, 2014 10:21 AM
> Subject: Yak-List: Hissing Pop-Off Valve
>
>
> When servicing the air system on our stock CJ, the pop-off valve begins
=9Chissing=9D at around 32 ATM and =9Cpops-off=9D at ar
ound 38 ATM (not allowing system to be pressurized any higher.) After poppi
ng off and servicing discontinued, hissing will continue (slowly diminishing
) until pressure settles at around 32 ATM. Although probably plenty for a f
ew start attempts, I want to fix the problem and have the full 50 ATM availa
ble.
>
> I know the valve is adjustable, but is the hissing a separate problem th
at needs to be addressed? Also, what specifically is causing the valve to h
iss?
>
> Thanks.
>
> Jim Shanks
> shankeroid@verizon.net
>
> http://ww"nofollow" target="_blank" href="http://forums.matronics.com/
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