Hi ya'll,
2 blades versus three thoughts and on going investigation.
2 blades have a great advantage when simplicity is concerned.
1/3 less effort to produce blades and the blade hanger can be
simplistic.
Bill F's tunnel tests got me interested in lower aspect ratio.
Thought being if the area of 2 equaled the area of 3 then perhaps lift would be similiar?
Then in the chord sizes blades have there are aerodynam
ic reasons why wider chords could be more efficent.
So having little else to do I am investigating.
So far ground and "car tunnel" tests have been very encouraging, some even astounding.
Currently I am about to commence flight tests and will report those findings.
I have reports of the car tunnel tests. Could Email them if you would desire, OK?
Will see ya'll at Hernando next time? "Autogyros over Spring Hill" Word is it is already organized!
Good luck!

Hal [email protected]