Today's Message Index:
----------------------
1. 06:47 AM - Re: Re: CJ TOOL SET & EXHAUST VALVES NEEDED (A. Dennis Savarese)
2. 07:27 AM - Re: Re: Engine failure in a Yak-50 (Eric Wobschall)
3. 09:24 AM - How to set my accelerometer? (ssssskippy)
4. 09:42 AM - Re: Fw: chinese decals (Pete Fowler)
5. 10:34 AM - Re: Re: Fw: chinese decals (Kurt Howerton)
6. 10:35 AM - Re: Re: Fw: chinese decals (Kurt Howerton)
7. 10:58 AM - Re: Fw: chinese decals (Pete Fowler)
8. 11:11 AM - Re: Re: Fw: chinese decals (Kurt Howerton)
9. 11:40 AM - Re: Re: Engine failure in a Yak-50 (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
10. 02:02 PM - Re: Re: Engine failure in a Yak-50 (Roger Kemp M.D.)
11. 02:13 PM - Re: Re: Engine failure in a Yak-50 (bill wade)
12. 02:33 PM - Re: How to set my accelerometer? (bill wade)
13. 02:46 PM - Re: How to set my accelerometer? (Olivier Vigneron)
14. 03:09 PM - Re: Re: Engine failure in a Yak-50 (Eric Wobschall)
15. 03:14 PM - Re: Re: Engine failure in a Yak-50 (Eric Wobschall)
16. 04:16 PM - Re: TBO (Rico Jaeger)
17. 10:45 PM - Re: TBO (Didier BLOUZARD)
Message 1
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| Subject: | Re: CJ TOOL SET & EXHAUST VALVES NEEDED |
Regardless of what you need for a CJ, including tools, your first call
should be to Doug Sapp. He typically has everything you will need.
He's in Omak, Washington.
Dennis
----- Original Message -----
From: Elmar Hegenauer
To: Yak-List@matronics.com
Sent: Saturday, October 16, 2010 11:19 PM
Subject: Yak-List: Re: CJ TOOL SET & EXHAUST VALVES NEEDED
How is doing business with those guys,
can you recommend them?
I am also looking for some tools what are
not (to my knowledge) available in whole
North America.
cheers
Elmar
P.S.: That is what the list is for, right?
Message 2
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| Subject: | Re: Engine failure in a Yak-50 |
Any time a propeller can turn, it can potentially windmill, especially
if the resistance is low.
As the airplane moves, the air flow creates pressure differentials in
the propeller blades, which are airfoils. This forces the blades to
move in the direction of the leading edge, thereby converting this
kinetic energy to torque acting on the propeller shaft.
On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
> Why does the propeller windmill on
> a ceased engine, sheared gearbox?
>
> Elmar
>
>
Message 3
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| Subject: | How to set my accelerometer? |
Hi
I have a problem with my rear accelerometer on a yak52.
It shows on the ground a solid 2G instead 1G.
In the instruments back, there is 3 small screws and a big one.
Can somebody tells me how to set the instrument accurately?
Thanks
Olivier
Le 17 oct. 2010 16:18, Eric Wobschall <eric@buffaloskyline.com> a crit :
>
> Any time a propeller can turn, it can potentially windmill, especially if the
resistance is low.
>
> As the airplane moves, the air flow creates pressure differentials in the propeller
blades, which are airfoils. This forces the blades to move in the direction
of the leading edge, thereby converting this kinetic energy to torque acting
on the propeller shaft.
>
>
>
> On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
>>
>> Why does the propeller windmill on
>> a ceased engine, sheared gearbox?
>>
>> Elmar
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 4
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| Subject: | Re: Fwd: chinese decals |
Getting quite a few requests and I have both a Russian and Chinese insigna converted
to a PDF that can be opened in Illustrator. The Chinese characters on Nanchangs
I've seen (including mine) tend to be vague and innacurate. Even after
I posted mine, I went back and did some more research and tightened them up so
this is the newest most correct version.
If you use these, I'd appreciate a couple of bucks (they're my original artwork)
but hopefully this helps folks who are looking for the right thing.
Note that a sign shop uses vector art (as opposed to bitmap), if you supply a JPEG,
they have to redraw and re-interpret the JPEG and the generational and human
losses can make the insignias come out vague and innacurate.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316061#316061
Attachments:
http://forums.matronics.com//files/russian_insignia_103.pdf
http://forums.matronics.com//files/chinese_insignia_295.pdf
Message 5
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| Subject: | Re: Fwd: chinese decals |
I ran across a vector graphic of the PLAAF roundel. I post a link later today.
--
Kurt "I.T." Howerton
N923YK
530.312.1299
Sent from my iPhone
On Oct 17, 2010, at 9:40, "Pete Fowler" <pfdesign1@cox.net> wrote:
>
> Getting quite a few requests and I have both a Russian and Chinese insigna converted
to a PDF that can be opened in Illustrator. The Chinese characters on
Nanchangs I've seen (including mine) tend to be vague and innacurate. Even after
I posted mine, I went back and did some more research and tightened them up
so this is the newest most correct version.
>
> If you use these, I'd appreciate a couple of bucks (they're my original artwork)
but hopefully this helps folks who are looking for the right thing.
>
> Note that a sign shop uses vector art (as opposed to bitmap), if you supply a
JPEG, they have to redraw and re-interpret the JPEG and the generational and
human losses can make the insignias come out vague and innacurate.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=316061#316061
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/russian_insignia_103.pdf
> http://forums.matronics.com//files/chinese_insignia_295.pdf
>
>
>
>
>
>
Message 6
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| Subject: | Re: Fwd: chinese decals |
Wikipedia:
en.m.wikipedia.org/wiki/File:Roundel_of_the_Peoples_Liberation_Army_Air_Force.svg
--
Kurt "I.T." Howerton
N923YK
530.312.1299
Sent from my iPhone
On Oct 17, 2010, at 9:40, "Pete Fowler" <pfdesign1@cox.net> wrote:
>
> Getting quite a few requests and I have both a Russian and Chinese insigna converted
to a PDF that can be opened in Illustrator. The Chinese characters on
Nanchangs I've seen (including mine) tend to be vague and innacurate. Even after
I posted mine, I went back and did some more research and tightened them up
so this is the newest most correct version.
>
> If you use these, I'd appreciate a couple of bucks (they're my original artwork)
but hopefully this helps folks who are looking for the right thing.
>
> Note that a sign shop uses vector art (as opposed to bitmap), if you supply a
JPEG, they have to redraw and re-interpret the JPEG and the generational and
human losses can make the insignias come out vague and innacurate.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=316061#316061
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/russian_insignia_103.pdf
> http://forums.matronics.com//files/chinese_insignia_295.pdf
>
>
>
>
>
>
Message 7
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| Subject: | Re: Fwd: chinese decals |
That wikipedia mess is a great example of a poorly researched and badly drawn insignia.
Not only is the letting not correct, It's drawn with dozens of misalgned
straight points rather than curves and looks like it was chiseled out of wood.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=316072#316072
Attachments:
http://forums.matronics.com//files/picture_4_190.jpg
Message 8
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| Subject: | Re: Fwd: chinese decals |
Isn't that the cool thing about wikipedia? You can fix it if it's wrong.
I'd love to see a better version posted for the benefit of the community.
--
Kurt "I.T." Howerton
N923YK
530.312.1299
Sent from my iPhone
On Oct 17, 2010, at 10:56, "Pete Fowler" <pfdesign1@cox.net> wrote:
>
> That wikipedia mess is a great example of a poorly researched and badly drawn
insignia. Not only is the letting not correct, It's drawn with dozens of misalgned
straight points rather than curves and looks like it was chiseled out of
wood.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=316072#316072
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/picture_4_190.jpg
>
>
>
>
>
>
Message 9
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| Subject: | Re: Engine failure in a Yak-50 |
I think the question was addressed more to WHY it was wind-milling Eric. I think
he meant "seized" instead of "ceased".
In any event, I believe the pilot said something like "the engine just seized",
etc. And honestly I am not sure if I heard that right either and am too lazy
to go back and listen to it again. :-) But, I think the issue was since the
engine ran out of oil, and seized, why was the prop still wind milling?
It's a good question really and one I hope I never find out the answer to it PERSONALLY.
Maybe someone else can explain how the engine:
1. Ran out of oil.
2. Stopped producing power.
3. Still managed to keep spinning from the wind load induced to the prop?
If the reduction gearbox came apart, one would think the prop would have spun a
LOT faster. Which lends one to believe that the engine stopped producing power
from a lack of oil, which usually results in bearings just coming apart and
the engine seizing. Yet the prop doesn't seem to show any signs of it suddenly
stopping and then start spinning again etc.
Maybe something like the cam drive broke?
Anyway, interesting question. I have no idea. Maybe someone else can answer
it.
Mark Bitterlich
________________________________
From: owner-yak-list-server@matronics.com on behalf of Eric Wobschall
Sent: Sun 10/17/2010 10:18 AM
Subject: Re: Yak-List: Re: Engine failure in a Yak-50
Any time a propeller can turn, it can potentially windmill, especially
if the resistance is low.
As the airplane moves, the air flow creates pressure differentials in
the propeller blades, which are airfoils. This forces the blades to
move in the direction of the leading edge, thereby converting this
kinetic energy to torque acting on the propeller shaft.
On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
> Why does the propeller windmill on
> a ceased engine, sheared gearbox?
>
> Elmar
>
>
Message 10
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| Subject: | Re: Engine failure in a Yak-50 |
I can answer on question. It ran out of oil because the oil pressure
adjustment plug was not safety wired and vibrated our. My question is if you
are losing oil pressure as this bolt started to work its' way back out would
there not have been an initial lower than normal pressure seen as this thing
begins to work out?
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Sunday, October 17, 2010 1:36 PM
Subject: RE: Yak-List: Re: Engine failure in a Yak-50
MALS-14 64E" <mark.bitterlich@navy.mil>
I think the question was addressed more to WHY it was wind-milling Eric. I
think he meant "seized" instead of "ceased".
In any event, I believe the pilot said something like "the engine just
seized", etc. And honestly I am not sure if I heard that right either and
am too lazy to go back and listen to it again. :-) But, I think the issue
was since the engine ran out of oil, and seized, why was the prop still wind
milling?
It's a good question really and one I hope I never find out the answer to it
PERSONALLY. Maybe someone else can explain how the engine:
1. Ran out of oil.
2. Stopped producing power.
3. Still managed to keep spinning from the wind load induced to the prop?
If the reduction gearbox came apart, one would think the prop would have
spun a LOT faster. Which lends one to believe that the engine stopped
producing power from a lack of oil, which usually results in bearings just
coming apart and the engine seizing. Yet the prop doesn't seem to show any
signs of it suddenly stopping and then start spinning again etc.
Maybe something like the cam drive broke?
Anyway, interesting question. I have no idea. Maybe someone else can
answer it.
Mark Bitterlich
________________________________
From: owner-yak-list-server@matronics.com on behalf of Eric Wobschall
Sent: Sun 10/17/2010 10:18 AM
Subject: Re: Yak-List: Re: Engine failure in a Yak-50
Any time a propeller can turn, it can potentially windmill, especially
if the resistance is low.
As the airplane moves, the air flow creates pressure differentials in
the propeller blades, which are airfoils. This forces the blades to
move in the direction of the leading edge, thereby converting this
kinetic energy to torque acting on the propeller shaft.
On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
> Why does the propeller windmill on
> a ceased engine, sheared gearbox?
>
> Elmar
>
>
Message 11
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| Subject: | Re: Engine failure in a Yak-50 |
What Elmar and I think it was Barry is implying is that when-most engines
=0Acease-things inside become molten metal and lockup I've done this num
erous times =0Aracing motorcycle's. And both these guys as well as myself a
re wondering if the =0Aengine did-cease --lockup due to lack of oil why
did the prop continue to =0Awindmill the cyl temp remain normal and the oi
l temp remain normal? There was an =0Aoil additive that would allow an engi
ne to run for a very long time without oil =0AI think the FAA almost certif
ied it I guess what I'm saying is the engine should =0Ahave run much longer
with 0 oil psi and then make bad banging noises as it shed =0Aparts. I sup
pose sense Richard has the airplane he could elaborate on the engine =0Adam
age. What could have happened is the pilot pulled the fuel leaver starving
=0Athe engine of fuel after seeing no oil pressure, after all the oil was l
ost =0Athere would be no more oil going over the sensor hence lowering oil
temp, and no =0Afuel no heat at the cyl head? just my thought Richard would
know.-=0A=0ABill Wade=0A=0A=0A=0A=0A________________________________=0AF
rom: Eric Wobschall <eric@buffaloskyline.com>=0ATo: yak-list@matronics.com
=0ASent: Sun, October 17, 2010 10:18:12 AM=0ASubject: Re: Yak-List: Re: Eng
<eric@buffaloskyline.com>=0A=0AAny time a propeller can turn, it can poten
tially windmill, especially- =0Aif the resistance is low.=0A=0AAs the air
plane moves, the air flow creates pressure differentials in- =0Athe prope
ller blades, which are airfoils. This forces the blades to- =0Amove in th
e direction of the leading edge, thereby converting this- =0Akinetic ener
gy to torque acting on the propeller shaft.=0A=0A=0A=0AOn Oct 17, 2010, at
ar Hegenauer <elmar.h@shaw.ca>=0A>=0A> Why does the propeller windmill on
=0A> a ceased engine, sheared gearbox?=0A>=0A> Elmar=0A>=0A>=0A>=0A>=0A>=0A
===============0A=0A=0A
Message 12
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| Subject: | Re: How to set my accelerometer? |
Olivier I had a problem with my G-meter a few years ago and took the back c
over =0Aoff, mine the interior was made of brass kind of like a clock and v
ibration over =0Athe years just wore it out I took the back G-meter out-a
nd put it up front and I =0Ahad another meter to put in the back you do kno
w that the front g-meter is also =0Aa switch and when you exceed the G limi
t a buzzing sound goes to the headset =0Atelling you to knock it off your e
xceeding my G-limits.=0A=0ABill Wade=0A=0A=0A=0A=0A________________________
________=0AFrom: ssssskippy <ssssskippy@gmail.com>=0ATo: "yak-list@matronic
s.com" <yak-list@matronics.com>=0ASent: Sun, October 17, 2010 12:20:47 PM
=0ASubject: Yak-List: How to set my accelerometer?=0A=0A--> Yak-List messag
e posted by: ssssskippy <ssssskippy@gmail.com>=0A=0AHi=0A=0AI have a proble
m with my rear accelerometer on a yak52.=0AIt shows on the ground a solid 2
G instead 1G.=0A=0AIn the instruments back, there is 3 small screws and a b
ig one.=0A=0ACan somebody tells me how to set the instrument accurately?=0A
=0AThanks=0A=0AOlivier =0A=0A=0ALe 17 oct. 2010 =E0 16:18, Eric Wobschall <
Eric Wobschall <eric@buffaloskyline.com>=0A> =0A> Any time a propeller can
turn, it can potentially windmill, especially if the =0A>resistance is low
.=0A> =0A> As the airplane moves, the air flow creates pressure differentia
ls in the =0A>propeller blades, which are airfoils. This forces the blades
to move in the =0A>direction of the leading edge, thereby converting this k
inetic energy to torque =0A>acting on the propeller shaft.=0A> =0A> =0A>
=0A> On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:=0A> =0A>> --> Yak
-List message posted by: Elmar Hegenauer <elmar.h@shaw.ca>=0A>> =0A>> Why d
oes the propeller windmill on=0A>> a ceased engine, sheared gearbox?=0A>>
=0A>> Elmar=0A>> =0A>> =0A>> =0A>> =0A>> =0A>> =0A> =0A> =0A> =0A> =0A> =0A
==============0A=0A=0A
Message 13
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| Subject: | Re: How to set my accelerometer? |
Thanks for your answer.
So you mean that the best way is to replace it?
2010/10/17 bill wade <bwade154@yahoo.com>
> Olivier I had a problem with my G-meter a few years ago and took the back
> cover off, mine the interior was made of brass kind of like a clock and
> vibration over the years just wore it out I took the back G-meter out and
> put it up front and I had another meter to put in the back you do know th
at
> the front g-meter is also a switch and when you exceed the G limit a buzz
ing
> sound goes to the headset telling you to knock it off your exceeding my
> G-limits.
>
> Bill Wade
>
> ------------------------------
> *From:* ssssskippy <ssssskippy@gmail.com>
> *To:* "yak-list@matronics.com" <yak-list@matronics.com>
> *Sent:* Sun, October 17, 2010 12:20:47 PM
> *Subject:* Yak-List: How to set my accelerometer?
>
>
> Hi
>
> I have a problem with my rear accelerometer on a yak52.
> It shows on the ground a solid 2G instead 1G.
>
> In the instruments back, there is 3 small screws and a big one.
>
> Can somebody tells me how to set the instrument accurately?
>
> Thanks
>
> Olivier
>
>
> Le 17 oct. 2010 =E0 16:18, Eric Wobschall <eric@buffaloskyline.com> a =E9
crit
> :
>
>
> >
> > Any time a propeller can turn, it can potentially windmill, especially
if
> the resistance is low.
> >
> > As the airplane moves, the air flow creates pressure differentials in t
he
> propeller blades, which are airfoils. This forces the blades to move in t
he
> direction of the leading edge, thereby converting this kinetic energy to
> torque acting on the propeller shaft.
> >
> >
> >
> > On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
> >
> >>
> >> Why does the propeller windmill on
> >> a ceased engine, sheared gearbox?
> >>
> >> Elmar
> >>
> >>
> >>
> >>
> >>
> &=======================
>
>
> *
>
===========
===========
===========
===========
> *
>
>
Message 14
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| Subject: | Re: Engine failure in a Yak-50 |
If the gearbox is "sheared", what does it matter how seized things are
aft of it?
My understanding is that the real hazard is when the planetary gears
lock up. That's when the engine twists itelf off of the airplane.
On Oct 17, 2010, at 5:09 PM, bill wade wrote:
> What Elmar and I think it was Barry is implying is that when most
> engines cease things inside become molten metal and lockup I've done
> this numerous times racing motorcycle's. And both these guys as well
> as myself are wondering if the engine did cease - lockup due to lack
> of oil why did the prop continue to windmill the cyl temp remain
> normal and the oil temp remain normal? There was an oil additive
> that would allow an engine to run for a very long time without oil I
> think the FAA almost certified it I guess what I'm saying is the
> engine should have run much longer with 0 oil psi and then make bad
> banging noises as it shed parts. I suppose sense Richard has the
> airplane he could elaborate on the engine damage. What could have
> happened is the pilot pulled the fuel leaver starving the engine of
> fuel after seeing no oil pressure, after all the oil was lost there
> would be no more oil going over the sensor hence lowering oil temp,
> and no fuel no heat at the cyl head? just my thought Richard would
> know.
>
> Bill Wade
>
> From: Eric Wobschall <eric@buffaloskyline.com>
> To: yak-list@matronics.com
> Sent: Sun, October 17, 2010 10:18:12 AM
> Subject: Re: Yak-List: Re: Engine failure in a Yak-50
>
> >
>
> Any time a propeller can turn, it can potentially windmill, especially
> if the resistance is low.
>
> As the airplane moves, the air flow creates pressure differentials in
> the propeller blades, which are airfoils. This forces the blades to
> move in the direction of the leading edge, thereby converting this
> kinetic energy to torque acting on the propeller shaft.
>
>
> On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
> >
> > Why does the propeller windmill on
> > a ceased engine, sheared gearbox?
> >
> > Elmar
> >
> >
> >sp; - -Matt Drall===========
>
>
Message 15
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| Subject: | Re: Engine failure in a Yak-50 |
Actually, I sort of doubt the engine was seized. However, when the oil
runs out and CHT skyrockets, combustion is screwed up and numerous
things are likely to happen to make the engine lose power.
On Oct 17, 2010, at 2:35 PM, Bitterlich, Mark G CIV Det Cherry Point,
MALS-14 64E wrote:
> Point, MALS-14 64E" <mark.bitterlich@navy.mil>
>
> I think the question was addressed more to WHY it was wind-milling
> Eric. I think he meant "seized" instead of "ceased".
>
> In any event, I believe the pilot said something like "the engine
> just seized", etc. And honestly I am not sure if I heard that right
> either and am too lazy to go back and listen to it again. :-) But,
> I think the issue was since the engine ran out of oil, and seized,
> why was the prop still wind milling?
>
> It's a good question really and one I hope I never find out the
> answer to it PERSONALLY. Maybe someone else can explain how the
> engine:
>
> 1. Ran out of oil.
> 2. Stopped producing power.
> 3. Still managed to keep spinning from the wind load induced to the
> prop?
>
> If the reduction gearbox came apart, one would think the prop would
> have spun a LOT faster. Which lends one to believe that the engine
> stopped producing power from a lack of oil, which usually results in
> bearings just coming apart and the engine seizing. Yet the prop
> doesn't seem to show any signs of it suddenly stopping and then
> start spinning again etc.
>
> Maybe something like the cam drive broke?
>
> Anyway, interesting question. I have no idea. Maybe someone else
> can answer it.
>
> Mark Bitterlich
>
>
> ________________________________
>
> From: owner-yak-list-server@matronics.com on behalf of Eric Wobschall
> Sent: Sun 10/17/2010 10:18 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Engine failure in a Yak-50
>
>
> >
>
> Any time a propeller can turn, it can potentially windmill, especially
> if the resistance is low.
>
> As the airplane moves, the air flow creates pressure differentials in
> the propeller blades, which are airfoils. This forces the blades to
> move in the direction of the leading edge, thereby converting this
> kinetic energy to torque acting on the propeller shaft.
>
>
> On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
>>
>> Why does the propeller windmill on
>> a ceased engine, sheared gearbox?
>>
>> Elmar
>>
>>
>>
>>
>>
>>
>
>
Message 16
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What is TBO for the M14?
Thanks!
>>> Eric Wobschall <eric@buffaloskyline.com> 10/17/10 5:11 PM >>>
Actually, I sort of doubt the engine was seized. However, when the oil
runs out and CHT skyrockets, combustion is screwed up and numerous
things are likely to happen to make the engine lose power.
On Oct 17, 2010, at 2:35 PM, Bitterlich, Mark G CIV Det Cherry Point,
MALS-14 64E wrote:
> Point, MALS-14 64E" <mark.bitterlich@navy.mil>
>
> I think the question was addressed more to WHY it was wind-milling
> Eric. I think he meant "seized" instead of "ceased".
>
> In any event, I believe the pilot said something like "the engine
> just seized", etc. And honestly I am not sure if I heard that right
> either and am too lazy to go back and listen to it again. :-) But,
> I think the issue was since the engine ran out of oil, and seized,
> why was the prop still wind milling?
>
> It's a good question really and one I hope I never find out the
> answer to it PERSONALLY. Maybe someone else can explain how the
> engine:
>
> 1. Ran out of oil.
> 2. Stopped producing power.
> 3. Still managed to keep spinning from the wind load induced to the
> prop?
>
> If the reduction gearbox came apart, one would think the prop would
> have spun a LOT faster. Which lends one to believe that the engine
> stopped producing power from a lack of oil, which usually results in
> bearings just coming apart and the engine seizing. Yet the prop
> doesn't seem to show any signs of it suddenly stopping and then
> start spinning again etc.
>
> Maybe something like the cam drive broke?
>
> Anyway, interesting question. I have no idea. Maybe someone else
> can answer it.
>
> Mark Bitterlich
>
>
> ________________________________
>
> From: owner-yak-list-server@matronics.com on behalf of Eric Wobschall
> Sent: Sun 10/17/2010 10:18 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Engine failure in a Yak-50
>
>
> >
>
> Any time a propeller can turn, it can potentially windmill, especially
> if the resistance is low.
>
> As the airplane moves, the air flow creates pressure differentials in
> the propeller blades, which are airfoils. This forces the blades to
> move in the direction of the leading edge, thereby converting this
> kinetic energy to torque acting on the propeller shaft.
>
>
> On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>
>>
>> Why does the propeller windmill on
>> a ceased engine, sheared gearbox?
>>
>> Elmar
>>
>>
>>
>>
>>
>>
>
>
Message 17
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Generally speaking : 500h plus 10%
some generation of motor 700h plus 10%
I can't make the difference between both but for sure some on the list, will.
Didier Blouzard
+33 6 2424 3672
Le 18 oct. 2010 01:12, "Rico Jaeger" <rijaeger@wausau.k12.wi.us> a crit :
>
> What is TBO for the M14?
>
> Thanks!
>
>>>> Eric Wobschall <eric@buffaloskyline.com> 10/17/10 5:11 PM >>>
>
> Actually, I sort of doubt the engine was seized. However, when the oil
> runs out and CHT skyrockets, combustion is screwed up and numerous
> things are likely to happen to make the engine lose power.
>
>
> On Oct 17, 2010, at 2:35 PM, Bitterlich, Mark G CIV Det Cherry Point,
> MALS-14 64E wrote:
>
>> Point, MALS-14 64E" <mark.bitterlich@navy.mil>
>>
>> I think the question was addressed more to WHY it was wind-milling
>> Eric. I think he meant "seized" instead of "ceased".
>>
>> In any event, I believe the pilot said something like "the engine
>> just seized", etc. And honestly I am not sure if I heard that right
>> either and am too lazy to go back and listen to it again. :-) But,
>> I think the issue was since the engine ran out of oil, and seized,
>> why was the prop still wind milling?
>>
>> It's a good question really and one I hope I never find out the
>> answer to it PERSONALLY. Maybe someone else can explain how the
>> engine:
>>
>> 1. Ran out of oil.
>> 2. Stopped producing power.
>> 3. Still managed to keep spinning from the wind load induced to the
>> prop?
>>
>> If the reduction gearbox came apart, one would think the prop would
>> have spun a LOT faster. Which lends one to believe that the engine
>> stopped producing power from a lack of oil, which usually results in
>> bearings just coming apart and the engine seizing. Yet the prop
>> doesn't seem to show any signs of it suddenly stopping and then
>> start spinning again etc.
>>
>> Maybe something like the cam drive broke?
>>
>> Anyway, interesting question. I have no idea. Maybe someone else
>> can answer it.
>>
>> Mark Bitterlich
>>
>>
>> ________________________________
>>
>> From: owner-yak-list-server@matronics.com on behalf of Eric Wobschall
>> Sent: Sun 10/17/2010 10:18 AM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Re: Engine failure in a Yak-50
>>
>>
>>
>>>
>>
>> Any time a propeller can turn, it can potentially windmill, especially
>> if the resistance is low.
>>
>> As the airplane moves, the air flow creates pressure differentials in
>> the propeller blades, which are airfoils. This forces the blades to
>> move in the direction of the leading edge, thereby converting this
>> kinetic energy to torque acting on the propeller shaft.
>>
>>
>>
>> On Oct 17, 2010, at 12:19 AM, Elmar Hegenauer wrote:
>>
>>>
>>> Why does the propeller windmill on
>>> a ceased engine, sheared gearbox?
>>>
>>> Elmar
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
>
>
>
>
>
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