12 b
Dear Paul,

My name is Gerhard Schiffmann, and I've recently completed building a
brand new experimental airplane of my own design (see attached photo).
It is a fiberglass amphibious plane, based off of the Dyke Delta
planform, with the exception that it is a pusher configuration. The
powerplant I selected for my plane is an RX7-20B, non-turbocharged,
rotary. Currently, I'm in the Phase I testing of the aircraft and have
successful completed several high-speed taxi runs, including a sustained
lift-off of a few feet (for about the distance of the Wright Brothers
first flight haha).

I've currently been struggling to program and master the accompanying
engine control module supplied by Traci Crook at Real World Solutions.
In this endeavor, I've been trying to contact Traci, but have been
unable to do so. Therefore, I was hoping to reach out to other Rotary
engine users, in attempt to receive some assistance, insight, and/or
tips on programming these amazing, yet misunderstood, engines.
Obviously, I have the engine up and running, but it's just the final
tuning of the engine for various throttle positions that I need some
assistance with.

Any help or recommendations that you would be gracious enough to
provide, would greatly appreciated.

Sincerely,
Gary  Schiffmann


Hi Gary, Years ago I sketched what amounted to an amphibious Rutan
Vari-Viggen.  A gentleman from Annapolis actually built something similar
that apparently worked well. I think it was called "Merganser".
With your impressive aircraft, I would worry about pitch control while on
the water. Will you be able to lift the nose while in a high speed taxi ?
Hopefully the planning attitude is nose high enough for lift off at a
reasonable speed with minimal help in pitch.  If it is a problem, a small
canard could solve the problem.  Flying off water is great fun. Good luck
with your project.

Murry Rozansky
Found a photo:  Attached.

Murry Rozansky


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