Montblack a écrit :
http://flight.cz/cricri/photos/FR-Fr...e_secchi_2.jpg
CriCri with a 3 bladed prop.

http://flight.cz/cricri/photos/FR-Fr..._secchi_20.jpg
Another pic of the 3 bladed CriCri

http://flight.cz/cricri/english/cri-...res-secchi.php
Pics are from this page.

(Guessing...)
Each engine is anywhere from 15-23 hp (5k-8k RPM).

Is that enough engine ability to notice (any) speed increase with the 3
blade prop? Or is the benefit all climb - and a little bit quieter?

CriCri:
Empty weight .......65-85 kg
MTOW ................175 kg - maybe a little more.
Cruise .................120 mph - maybe a little more


Montblack

Why not ask Frederic Secchi ? Or better yet, Michel Colomban, who
designed the airplane, and is a first class aerodynamicist ?

Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr