Engine Mounting Upside Down?

Engine Mounting Upside Down?

Post by Corb » Tue, 05 Jun 2001 10:22:37



We are building our first plane.  We purchased a Piper J-3 Cub ARF
pre-built.  It came as a kit with an O.S. LA25 engine.  The only way
we can figure out how to mount it is upside down.  Is this the proper
way to mount it?  Please help.
 
 
 

Engine Mounting Upside Down?

Post by zigg » Tue, 05 Jun 2001 11:19:44


Hi Corbin-

Upside down engine mounting is done frequently.  Some Cubs mount the engine
to the side so the head gives a semi-realistic look sticking out thru the
cowling.  Depends on the size of the plane.  Does the kit manufacturer have
a e-mail address or 800 number you can ask them?  Give some more detail
about which kit you have to this news group and you should find plenty of
help.  My Sig 1/4 scale Cub will have the Zenoah G-23 mounted upside down
too.  Good Luck

Ziggy

Quote:

>We are building our first plane.  We purchased a Piper J-3 Cub ARF
>pre-built.  It came as a kit with an O.S. LA25 engine.  The only way
>we can figure out how to mount it is upside down.  Is this the proper
>way to mount it?  Please help.


 
 
 

Engine Mounting Upside Down?

Post by Dr1Driv » Tue, 05 Jun 2001 21:07:46


Quote:
> The only way
>we can figure out how to mount it is upside down.  

You can to that.  Or mount it sideways and let it stick out of the cowl.  If
you go inverted, here are a few hints.

Lower the tank so the centerline is as close to the carb spraybar as possible.
Don't start it inverted, then turn it over.  It's a little dangerous.
When ***, turn the engine over a couple of times to make sure you don't
have a fuel lock in the chamber.  Good luck with it ,and write if you have any
more questions.
Dr.1 Driver
"There's a Hun in the sun!"

 
 
 

Engine Mounting Upside Down?

Post by LSA Vinn » Wed, 06 Jun 2001 01:01:11



Quote:
>we can figure out how to mount it is upside down.  Is this the proper
>way to mount it?  Please help.

Have you seen plane flying upside down?-p If yes, don't you think it will
might work? I've never installed engine upside down for my planes.

I've been told (experienced facts) that when idling, glow plug may have
troubles keep it's heat up because fuel does "drops" to glow plug.
Especially when idling longer. One solution for that is onboard glow...

--

          LSA

http://www.tekniikka.turkuamk.fi/~pmattila/eindex.html

 
 
 

Engine Mounting Upside Down?

Post by Mr Wizzar » Sat, 09 Jun 2001 15:16:12


I've found that if the low speed idle needle valve is properly leaned out,
you won't get wetting of the glow plug - that's what the metering system
does - keeps mixture constant at *all* throttle settings, and air flow
conditions.


Quote:

> >we can figure out how to mount it is upside down.  Is this the proper
> >way to mount it?  Please help.

> Have you seen plane flying upside down?-p If yes, don't you think it will
> might work? I've never installed engine upside down for my planes.

> I've been told (experienced facts) that when idling, glow plug may have
> troubles keep it's heat up because fuel does "drops" to glow plug.
> Especially when idling longer. One solution for that is onboard glow...

> --

>           LSA

> http://www.tekniikka.turkuamk.fi/~pmattila/eindex.html