Frank van der Hulst wrote:

Allan wrote:

First conclusion: the rotary installation is all up about 100 pounds heavier
than the Lycoming engine that it replaces.  Both the rotary RV-6 and -6A are
heavier than the factory prototypes by about that much.  The extra 100
pounds will have no in flight effect beyond a slight degradation of climb
performance.

Except for aerobatics. Given a max aerobatic weight of 1375 lbs (IIRC),
there is a big difference between a 1000lb airplane and an 1100lb
airplane. That extra 100lbs means that dual aerobatics is definitely out
of the question.

And takeoff and landing... given the same power, it'll take longer to
get airborne. And landings will be 10% longer.

A goal of future installations might be to work on decreasing the weight
penalty.

Definitely.

Frank.

--
frankv@ee.cit.ac.nz     Frank van der Hulst
This is my work account. Weekend email should be
sent to me at frankvdh@ihug.co.nz.
My home page is http://homepages.ihug.co.nz/~frankvdh

 
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