-
System Administrator
-
 Topic Author
-
Offline
-
Posts: 794
-
Thank you received: 2
-
-
|
This rolled in today.
www.ruppert-composite.ch/en/aktuell/237-...n-archaeopteryx.html
Karl
--- In This email address is being protected from spambots. You need JavaScript enabled to view it., russell wilson wrote:
>
> hi i forgot yesterday to mention in relation to electric power.....royobi
> and other manufacturers are making mowers and chain saws 36 v now and are
> using lithium ion batteries and chargers to suit...i dont think they have
> power controllers though.(the gnome engine on the focka try plane...red
> barron....had no speed controller/throttle....it was contrilled when taxing
> by an on off switch:)
> i dont know much about this side of things.
> props are generally 80% eficient.
> weight devided by glide ratio is a rough calculation for thrust required
> for level flight.
> a large slow diameter prop seems better for low power.
> folding prop joints get hammered by single cylender motors.
> thats about all i got on this subject.
> russ.
|