Birdy electric motorglider

[billyvray]

Popped up on my Youtube feed. Nice looking little sailplane. Pusher, electric, shaft driven, all composite.

Birdy Elektromotorsegler

Individuell Starten, Segelfliegen oder Luftwandern, und das auch noch elektrisch!

e-birdy.com

translated site: Google Translate

 

[STDJantar2]

The names behind it do deserve some credit!!!

 

[Aesquire]

Lovely.

A 3 blade prop might be better for noise, but other than that, nicely done. I want one if it'll take a 200 pound pilot, and I win the lottery.

Very clean & clever motor mounting.

 

[henryk]

3 blade prop might be better for noise,

=CR propellers are moore energy effective....

 

[henryk]

energy effective....

=and NOT so noisy (mobile fon effect ?)

 

[Sunbird]

Contra-rotating propellers would not be able to fold back for streamlining.

 

[henryk]

Contra-rotating propellers would not be able to fold back for streamlining.

=why ?

(2-step=rear then second ...)

BTW=+ 30-50 % moore thrust , NO gear,lower noise !

 

[Aesquire]

Yes, contrarotating props with 2 electric motors would be efficient, and less complex than a contrarotating PSRU, but my comment was about noise. The 2 blades passing simultaneously through the wake of the vertical stabilizer increase vibration & noise. 3 blade prop adds a blade, hinge, & larger hub. Should be a simple bolt on.

 

[Dan G]

This vehicle is a motor glider-most of the time it will fly with engine not in operation. Prop efficiency and noise is less important than simplicity and light weight and mainly low drag when not running.

 

[henryk]

contrarotating props with 2 electric motors would be efficient,

=CR propellers with ONLY one motor are much better,as with two motors
(weight,thrust,noise,cooling...)

=iff not for MOTORGLIDERS ?

(ZENOACH G25, circa 20 HP...)