CriCri + 3 bladed prop(s) ???

[Montblack]

http://flight.cz/cricri/photos/FR-Frederic-Secchi/france_secchi_2.jpg
CriCri with a 3 bladed prop.

http://flight.cz/cricri/photos/FR-Frederic-Secchi/france_secchi_20.jpg
Another pic of the 3 bladed CriCri

http://flight.cz/cricri/english/cri-cri-photos-pictures-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

[GTH]

Montblack a écrit :
> http://flight.cz/cricri/photos/FR-Frederic-Secchi/france_secchi_2.jpg
> CriCri with a 3 bladed prop.
>
> http://flight.cz/cricri/photos/FR-Frederic-Secchi/france_secchi_20.jpg
> Another pic of the 3 bladed CriCri
>
> http://flight.cz/cricri/english/cri-cri-photos-pictures-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

[flybynightkarmarepair]

Another reason to add a blade is to absorb more power within a limited
diameter.

[Capt.Doug]

>"GTH" wrote in message
> Why not ask Frederic Secchi ? Or better yet, Michel Colomban, who
> designed the airplane, and is a first class aerodynamicist ?

Because they don't post in this group?

D.