> >> Let me know if you need more dimensions Jerry.
> >> --  > >> Paul Lamar ...No rotor no motor.
> >
> > Hi Paul,
> > wasn't moving the prop out to 44 inches the way to go?
> >
> > Kind regards
> > Thomas
> >
> > I am not sure. Depends on the weight and balance. Some guys  are  > > beefing
> > up the tail so that adds weight back there. Beefing the tail  on the
> > rotary powered RV4 is unnecessary. Tracy has not had the tail  skin  > > cracking problems
> > the Lycoming powered airplanes have experienced due to way  less  > > vibration.
> >
> > -- > > Paul Lamar ...No rotor no motor.
> > Thomas, most plans, using an 0-320, have the prop flange  at  around
> 38 inches.  I recommend standardizing the distance to 40 inches for
> most   rotary installations.  Doing so provides some very useful
> space between the engine and firewall.   Note that a p ported  engine
> will probably weigh less than an 0320 FWF.  The absolute minimum is
> 36.75 inches if  you want to be able to RR the water pump without
> pulling the engine.   If for c.g. reason the prop flange distance
> needs to be some amount greater than 40 inches, we can do that.  So
> far only one engine installation has required more than 40 inches.
> There are no  serious c.g. issues swapping in the rotary but you  will
> probably have to fine tune with battery placement.    Jerry
> Basically I'm for moving the prop flange as far out as practicable,
to gain more space under the cowling.
But in the end the renesis FWF-kit should develop about the same
amount of torsional moment relating to a plane of reference as a
common O-320 FWF-kit would.
That opens up two new problems to me. How much weighs a renesis
[RX8 eng.] FWF-kit  compared to a O-320 FWF kit and where is
approximately the c.g. of a complete FWF-kit?
best regards
Thomas
The RX8 engine weighs about the same as a 13B. If the flange
on the 13B is set at 39 inches the weight and balance comes
out about the same as Lycoming O-320. The CG of the engine/PSRU/prop
combination is about near the flywheel end housing or perhaps
one or two inches aft of that. The firewall forward weight
is about 320 pounds. Obviously that is about the same for
the Lyc O-320.
http://www.rotaryeng.net/all-aircraft-engine-weights.txt
Paul Lamar ...No rotor no motor.

Hi Paul an Jerry,
thanks for your efforts. Lets go with 40 inches.

best regards
Thomas


Thomas if you don't mind my asking what part of Germany
are you in?
-- 
Paul Lamar ...No rotor no motor.

Thomas, would you send me your e-mail address and shipping address.
Thanks,     jerryhey@earthlink.net


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