Today's Message Index:
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1. 03:18 AM - Re: Difference between AK-50A and AK-50T? (Steve Geard)
2. 03:34 AM - M14p engine mount rubbers (Steve Geard)
3. 03:48 AM - Barrett high compression piston experience (aerostar6)
4. 05:26 AM - Re: Barrett high compression piston experience (Terry Calloway)
5. 07:08 AM - Re: Program Letter (Rico Jaeger)
6. 10:40 AM - Re: Barrett high compression piston experience (Bitterlich, Mark G CIV NAVAIR, WD)
7. 03:40 PM - Propeller not responding on ground at 70% (YAKY52)
8. 03:47 PM - Compressor shearing shaft. (YAKY52)
9. 06:17 PM - Re: Compressor shearing shaft. (cjpilot710@aol.com)
Message 1
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| Subject: | Re: Difference between AK-50A and AK-50T? |
One ends in an A, the other a T.
[Rolling Eyes]
--------
SteveO
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430276#430276
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| Subject: | M14p engine mount rubbers |
Hello. Does anyone have a set of engine mount rubbers available for my Yak55m please
n thank you. I'll need a price delivered to New Zealand please.
Thanks Steve. :D
--------
SteveO
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430278#430278
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| Subject: | Barrett high compression piston experience |
Looking for some real life experience of Barrett's high compression pistons.
We are getting our M14p overhauled this winter and are trying to decide between
standard and high compression pistons supplied by Barrett.
Whilst the extra 20hp offered is attractive, I am concerned that fuel flow will
increase as well: reduced range is not very attractive in a Yak 50 with already
"short legs".
Has anyone out there got, say, a year or more under their belt with the high comp
pistons that can give us some feedback on comparative fuel flows as power output
and oil consumption?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430281#430281
Message 4
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| Subject: | Re: Barrett high compression piston experience |
Talk to Keith Harbour at Avcraft.
Terry L. Calloway
South Central Territory Manager
Novacoast, Inc.
Mobile: 620-875-9450
Office: 800-949-9933 x5130
FAX: 620-231-0990
www.Novacoast.com
> On Sep 10, 2014, at 5:48 AM, aerostar6 <mwlevy@btinternet.com> wrote:
>
>
> Looking for some real life experience of Barrett's high compression piston
s.
>
> We are getting our M14p overhauled this winter and are trying to decide be
tween standard and high compression pistons supplied by Barrett.
>
> Whilst the extra 20hp offered is attractive, I am concerned that fuel flow
will increase as well: reduced range is not very attractive in a Yak 50 wit
h already "short legs".
>
> Has anyone out there got, say, a year or more under their belt with the hi
gh comp pistons that can give us some feedback on comparative fuel flows as p
ower output and oil consumption?
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=430281#430281
>
>
>
>
>
>
>
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Message 5
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Amen=2C Brotha!
Rico Jaeger
915 S. 11th Ave.
Wausau=2C WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //
From: l129bs@gmail.com
Subject: Re: Yak-List: Program Letter
Like I said=2C ask him or help to educate them. They will actually help you
. But if you go in with the "attitude" then it's never going to work. Like
it or not=2C these folks hold the key to your airplane. So getting along is
always a good thing. Don't you think? 40 certifications with no problems.
One FSDO asked if they could come and watch a gear swing so they could unde
rstand what they were looking at. Education crosses a lot of bridges. Howev
er=2C there will always be one of those not so sweet apples in the bunch. J
ust like there are some not so sweet apples in our pilot bunch.
Glad it worked out Ernie.
Bill
Sent from my iPad
On Sep 10=2C 2014=2C at 4:35=2C Ernest Martinez <erniel29@gmail.com> wrote:
In the end everything worked out fine=2C the FSDO guy called me this mornin
g and was quite pleasant. He did point out an error on my existing Ops Limi
ts=2C which had my CJ categorized as a Group III aircraft (>12=2C500lbs and
>800 HP). Otherwise he started out wanting my Chief mechanics name=2C and
my Approved Maintenance plan=2C and other items which did not apply. Once I
walked him through the order and explained that my aircraft did not requir
e a maintenance plan=2C and that I was a group II aircraft=2C and that I di
d not need to provide all the items listed in "Initial Certification" and t
hat I was no longer in Phase I=2C and that I was not asking for a change in
my Ops Limits=2C he agreed with everything and we were done.
Sometimes it just takes a little patience=2C something I'm not known for :)
Ernie
On Tue=2C Sep 9=2C 2014 at 3:13 PM=2C Bitterlich=2C Mark G CIV NAVAIR=2C WD
<mark.bitterlich@navy.mil> wrote:
rk.bitterlich@navy.mil>
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"Our idea of a good time is making sure you don't have one. "
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A quote I suspect applies to many government agencies.
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ist"">http://www.matronics.com/Navigator?Yak-List=0A
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ot=3B">http://www.matronics.com/contribution=0A
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Message 6
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| Subject: | Barrett high compression piston experience |
I have experience with three M-14's running these pistons. Two M-14P models, and
one M-14PF. The pistons offer other benefits besides higher compression (and
it is not much of an increase) mainly much better piston rings with a closer
tolerance and as a result much lower oil consumption and less leakage past
the rings into the lower cylinders when the engine is not running. This also
means a much lower tendency for spark plug fouling among other things.
While it is true that if you UTILIZE that extra power you are going to see increased
fuel flow (you never get something for nothing), it is also true that you
have a throttle and a RPM control that adjusted properly will give you the same
fuel flow as you had before.
Oil consumption has been MUCH lower on every one of the engines I have dealt with
that have been modified with these pistons and rings.
That said, the folks that run these engine that I deal with don't normally keep
track of fuel consumption to speak of, so I can't really answer that question.
That said, when it comes time to rebuild my engine, there is no question that
I will do this mod. The Russian piston rings have a very high expansion rate
with temperature, and thus are really sloppy loose when cold. There is no
question that Western piston & ring design is far more advanced than what came
from the factory, especially with the gap-less rings that Barrett uses.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Terry Calloway
Sent: Wednesday, September 10, 2014 8:25 AM
Subject: Re: Yak-List: Barrett high compression piston experience
Talk to Keith Harbour at Avcraft.
Terry L. Calloway
South Central Territory Manager
Novacoast, Inc.
Mobile: 620-875-9450
Office: 800-949-9933 x5130 <tel:800-949-9933;5130>
FAX: 620-231-0990
www.Novacoast.com <http://www.novacoast.com/> <http://www.novacoast.com/>
On Sep 10, 2014, at 5:48 AM, aerostar6 <mwlevy@btinternet.com> wrote:
Looking for some real life experience of Barrett's high compression pistons.
We are getting our M14p overhauled this winter and are trying to decide
between standard and high compression pistons supplied by Barrett.
Whilst the extra 20hp offered is attractive, I am concerned that fuel flow
will increase as well: reduced range is not very attractive in a Yak 50 with
already "short legs".
Has anyone out there got, say, a year or more under their belt with the
high comp pistons that can give us some feedback on comparative fuel flows as
power output and oil consumption?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430281#430281
http://w==========================; - MATRONICS WEBref="http://forums.matronics.com">http://forums.matronics.com <http://www.matronics.com/Navigator?Yak-List> http://www.matronics.com/contribution
Message 7
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| Subject: | Propeller not responding on ground at 70% |
Hello Yakkers,
I need advices on this subject...
Airplane didn't fly for 45days no issue last time I flew And I ran the engine.
After an oil change I did the engine run, normal warm up 40 /120, cycling the prop
at 70% nothing happened, ZERO REACTION, but oil Pressure slightly drop.
2nd run I tried to look the screen in the hub nothing found,
82/85% power, same condition, prop cycling down to 56%.
Intermediate setting 72 % -80% irregular dropping in percentage.
I have tough either pressure problem on governor, some kind of dirt somewhere...the
p
rop cable is in place and secure.
Any advise or idea would be very appreciate.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430323#430323
Message 8
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| Subject: | Compressor shearing shaft. |
I toke off compressor from the airplane because I didn't have any pressure building
in the bottle.
Results the two pieces of the shafts sheared in correspondence of the joining
rivets.
No big deal simple repair but.....
How many rivets are supposed to be fitted in the two half of the shafts??
There is space for 6 of them but I found just 2 steel rivets which looks a bit
too weak setting to me.
Any suggestion or personal experience or knowledge???
Thank you.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430325#430325
Message 9
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| Subject: | Re: Compressor shearing shaft. |
There only 2 rivets that act as shear points.
Pappy
In a message dated 9/10/2014 6:52:56 P.M. Eastern Daylight Time,
vulavula@libero.it writes:
--> Yak-List message posted by: "YAKY52" <vulavula@libero.it>
I toke off compressor from the airplane because I didn't have any pressure
building in the bottle.
Results the two pieces of the shafts sheared in correspondence of the
joining rivets.
No big deal simple repair but.....
How many rivets are supposed to be fitted in the two half of the shafts??
There is space for 6 of them but I found just 2 steel rivets which looks a
bit too weak setting to me.
Any suggestion or personal experience or knowledge???
Thank you.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430325#430325
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