Michael McGee wrote:

Interesting conversation last night with an engineer friend familiar with
the rotary engined HyperBipe that Ted Mayfield was working on a few years
ago here in Oregon.  My friend said that the plane was VERY quiet, which
surprised me knowing the effort we take to quiet the 13B.  This I think was
an NSU unit and was written up in Kit Planes or Experimenter or other
magazine some time back.  I could not find it in my stacks of old magazines.

Is anyone familiar enough with the NSU to comment on its exhaust note
compared to the 13B?  Or, did this installation have an exceptional
muffler?  Of course we are talking about 1/4 the horsepower.

The plane was flying for a while before some business problems came between
the engine and the plane.

Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR
13B in gestation mode

It was a Wankel Gmbh Germany engine. Big muffler small rotary :-)
They are back in business according to the last press info I received
from the president and CEO Juergen Bax.

Paul Lamar
 
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