I am looking at picking up a Cessna 337 Skymaster for our project -
Skymaster 336 may also do but is light on useful load for our purposes.
The
337 C and D models look like they have the highest useful loads.

We would replace the 2 x 210 Hp Continental IO 360 engines with 2
rotaries
of equal or higher hp but with the emphasis on higher turbo normalized
altitude capability. Losing the FAA type rating is not an issue for us.

Any ideas on the firewall forward weight of the Continental IO360 at 210
hp.
I am hoping for a weight savings after rotary install to increase our
useful
load. Thanks

Brian Feeney
DreamSpace Group

There won't be much weight savings unless you get aluminum end housing.
If you do that you might save about 100 pounds per engine.

Paul Lamar


The small Continental (IO-360) is quite heavy, being a 6 cylinder..
Maybe 50lbs heavier than a parallel valve 4 cylinder Lycoming (O-320,
O-360)..  I believe the installed weight of the Continental may be
somewhat heavier than the angle valve 4 cylinder Lycoming (IO-360).

http://www.aviator.cc/aircraft_engine_weights.html

There are STC's to convert the Skymaster to using twin turbocharged
IO-550's..  The airframe can (be made to) handle the weight.

http://www.aviationenterprises.us/engineconversion.html


Matt-

I have it as 327 pounds.

http://www.rotaryeng.net/all-aircraft-engine-weights.txt

Paul Lamar

NASA did this in the 80's.  They put a rotary in the front with a belt drive
and left the Continental on the rear.  The program was cancelled just before
first flight.

Joe Berki
Limo EZ