2017.07.02

Hello Paul,

I've found some infos about a rearly good looking plane. Propeller is
driven by an electric machine, power comes from a RE RE ;-) (Rotary
Engine Range Extender) placed behind the seats - good weight
distribution ...

It's just fun to look at the design ... ;-)


With kindest regards

Franky / Frank Herfert

It is so stupid having an engine driving a generator and then driving
an electric  motor.

This is indicative of their defective technical education. The laws
of physics are not just a good idea. They are the LAW!

When you multiply the efficiencies you wind up less than 20% over all
fuel efficiency.

Technical education is being corrupted by Whacko environmental
stupidity.

Paul Lamar

Given the physics, let me ask a few questions, because I didn't
get into engineering classes in the two years of college I had
(almost all was computer programming):

Would a 3 phase electrical system give more efficiency? Not that
it would be sufficient, but just asking.

Would a hydraulic pump with hydraulic drive of the prop be
sufficiently efficient to make it worth looking at?

Regards,
Steve Thompson

3 Phase would not change anything.

I know very little about hydraulic pump efficiency but I guess
it would be no different that any other conversion of energy
from one form to another. Lets say the pump is 90% and the
motor is 90%. Point 9 times point 9 is point 81% over all. You have just lost
20% of your fuel.


Paul Lamar


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