Robert Biegler's Recent Activity

Robert Biegler replied to the thread Sharrow counterrotating propeller seems to have negative stagger and positive stagger.

I first found it at Ultra-efficient looped propeller gets contra-rotating double upgrade...

Robert Biegler posted a new thread.

Sharrow counterrotating propeller seems to have negative stagger and positive stagger

I saw this picture in a news piece promising a lot greater efficiency: [IMG] Each blade of the Sharrow propeller is like a box wing....

Forum: Props

Robert Biegler added new media Sharrow counterrotating propeller to Mildly unorthodox craft

Each blade of the Sharrow is like the wing of a box wing plane. For reasons I don't understand, the two propellers in this drive have opposite stagger, one of them positive, the other negative.