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Limbach VW engine quirc



 
 
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  #1  
Old August 13th 11, 05:53 PM posted to rec.aviation.homebuilt
Lars[_2_]
external usenet poster
 
Posts: 3
Default Limbach VW engine quirc

Hi all!
It's been a while since I visited this group, I've been busy putting a
Scotish Aviation Bulldog on civilian register with a group of people
at the Swedish Air Force Museum. But now a friend of mine visited a
cousin in the US and whent on an airboat ride in the Everglades and
that hooked him so he has decided on building an airboat for himself.
Got the plans and everything and was looking for a suitable engine. I
happend to know a guy who swapped his VW for a Rotax in his Jodel D18,
so I called him to hear where his engine went but it was sold. The
flying club however had no less than two Limbachs lying around, one
aledgedly working that came out of a motor glider (also converted to
Rotax) and the other one with a crooked cranc shaft after a prop
strike. He got both at a bargain, but now we are puzzled because none
of the engines can be turned. Tops are off as well as magnetos and
fuel pump, but something clanks after approx. 340 degress of rotation.
Turning it forward it stops some way past TDC for the front cylinders
and turning it backwards is stops immediatley after TDC of the rear
cylinders, so it is not the pistons getting caught. If it was
something with the valve lifters I would have assumed that it would
get caught at close to 720 degrees, not close to 360 degrees, since
the cam shaft rotates at half the cranc shaft speed.

Most likley we are missing something obvious, so please feel free to
have a laugh at our ignorance, if only you can point out what we are
not thinking about!

Thanks!
/Lars

P.S. Remove the obvious from the email address if you want to mail me
directly. D.S.
  #2  
Old September 6th 11, 07:37 AM posted to rec.aviation.homebuilt
Lars[_2_]
external usenet poster
 
Posts: 3
Default Limbach VW engine quirc

On 13 Aug, 18:53, Lars wrote:
Hi all!
It's been a while since I visited this group, I've been busy putting a
Scotish Aviation Bulldog on civilian register with a group of people
at the Swedish Air Force Museum. But now a friend of mine visited a
cousin in the US and whent on an airboat ride in the Everglades and
that hooked him so he has decided on building an airboat for himself.
Got the plans and everything and was looking for a suitable engine. I
happend to know a guy who swapped his VW for a Rotax in his Jodel D18,
so I called him to hear where his engine went but it was sold. The
flying club however had no less than two Limbachs lying around, one
aledgedly working that came out of a motor glider (also converted to
Rotax) and the other one with a crooked cranc shaft after a prop
strike. He got both at a bargain, but now we are puzzled because none
of the engines can be turned. Tops are off as well as magnetos and
fuel pump, but something clanks after approx. 340 degress of rotation.
Turning it forward it stops some way past TDC for the front cylinders
and turning it backwards is stops immediatley after TDC of the rear
cylinders, so it is not the pistons getting caught. If it was
something with the valve lifters I would have assumed that it would
get caught at close to 720 degrees, not close to 360 degrees, since
the cam shaft rotates at half the cranc shaft speed.

Most likley we are missing something obvious, so please feel free to
have a laugh at our ignorance, if only you can point out what we are
not thinking about!

Thanks!
/Lars

P.S. Remove the obvious from the email address if you want to mail me
directly. D.S.


Hi again!
No reply, perhaps no surprise. Anyway, the engine is now completely
dismantled and nothing was found. In the process, the stop disappeared
after removing the oil pump. The obvious theory would have been
something caught in the drive train but no foreign objects where ever
found. I guess we will never know. The engine got a complete
inspection, the case will be painted bright red and hopefully it will
be on the waters, annoying the crowds, by next summer!

/Lars
  #3  
Old September 13th 11, 07:22 PM posted to rec.aviation.homebuilt
David E. Powell
external usenet poster
 
Posts: 168
Default Limbach VW engine quirc

On Sep 6, 2:37*am, Lars wrote:
On 13 Aug, 18:53, Lars wrote:





Hi all!
It's been a while since I visited this group, I've been busy putting a
Scotish Aviation Bulldog on civilian register with a group of people
at the Swedish Air Force Museum. But now a friend of mine visited a
cousin in the US and whent on an airboat ride in the Everglades and
that hooked him so he has decided on building an airboat for himself.
Got the plans and everything and was looking for a suitable engine. I
happend to know a guy who swapped his VW for a Rotax in his Jodel D18,
so I called him to hear where his engine went but it was sold. The
flying club however had no less than two Limbachs lying around, one
aledgedly working that came out of a motor glider (also converted to
Rotax) and the other one with a crooked cranc shaft after a prop
strike. He got both at a bargain, but now we are puzzled because none
of the engines can be turned. Tops are off as well as magnetos and
fuel pump, but something clanks after approx. 340 degress of rotation.
Turning it forward it stops some way past TDC for the front cylinders
and turning it backwards is stops immediatley after TDC of the rear
cylinders, so it is not the pistons getting caught. If it was
something with the valve lifters I would have assumed that it would
get caught at close to 720 degrees, not close to 360 degrees, since
the cam shaft rotates at half the cranc shaft speed.


Most likley we are missing something obvious, so please feel free to
have a laugh at our ignorance, if only you can point out what we are
not thinking about!


Thanks!
/Lars


P.S. Remove the obvious from the email address if you want to mail me
directly. D.S.


Hi again!
No reply, perhaps no surprise. Anyway, the engine is now completely
dismantled and nothing was found. In the process, the stop disappeared
after removing the oil pump. The obvious theory would have been
something caught in the drive train but no foreign objects where ever
found. I guess we will never know. The engine got a complete
inspection, the case will be painted bright red and hopefully it will
be on the waters, annoying the crowds, by next summer!

/Lars


Congrats, I hope you have a blast, Airboats are fun as all!
  #4  
Old October 22nd 11, 05:13 PM posted to rec.aviation.homebuilt
wesley marceaux[_2_]
external usenet poster
 
Posts: 3
Default Limbach VW engine quirc

Mr Lars/
I sure wish I could trade you my 0-320 lyc. for your two
limbach engines..If your in the lower U.S. get back to me and maybe we could
do some business.
150H.P. will do allot for an AirBoat..
Cajun Wes
"Lars" wrote in message
...
On 13 Aug, 18:53, Lars wrote:
Hi all!
It's been a while since I visited this group, I've been busy putting a
Scotish Aviation Bulldog on civilian register with a group of people
at the Swedish Air Force Museum. But now a friend of mine visited a
cousin in the US and whent on an airboat ride in the Everglades and
that hooked him so he has decided on building an airboat for himself.
Got the plans and everything and was looking for a suitable engine. I
happend to know a guy who swapped his VW for a Rotax in his Jodel D18,
so I called him to hear where his engine went but it was sold. The
flying club however had no less than two Limbachs lying around, one
aledgedly working that came out of a motor glider (also converted to
Rotax) and the other one with a crooked cranc shaft after a prop
strike. He got both at a bargain, but now we are puzzled because none
of the engines can be turned. Tops are off as well as magnetos and
fuel pump, but something clanks after approx. 340 degress of rotation.
Turning it forward it stops some way past TDC for the front cylinders
and turning it backwards is stops immediatley after TDC of the rear
cylinders, so it is not the pistons getting caught. If it was
something with the valve lifters I would have assumed that it would
get caught at close to 720 degrees, not close to 360 degrees, since
the cam shaft rotates at half the cranc shaft speed.

Most likley we are missing something obvious, so please feel free to
have a laugh at our ignorance, if only you can point out what we are
not thinking about!

Thanks!
/Lars

P.S. Remove the obvious from the email address if you want to mail me
directly. D.S.


Hi again!
No reply, perhaps no surprise. Anyway, the engine is now completely
dismantled and nothing was found. In the process, the stop disappeared
after removing the oil pump. The obvious theory would have been
something caught in the drive train but no foreign objects where ever
found. I guess we will never know. The engine got a complete
inspection, the case will be painted bright red and hopefully it will
be on the waters, annoying the crowds, by next summer!

/Lars



 




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