ORIGINAL: Spaced
billf, I would think that the top rotor would be slower than the bottom as its operating in the wash of the lower rotor.If you dont mind, whats the rotor diameter of yours, the space between the rotors, and did you have different blade incedence on the top and bottom rotors?
Thanx
Spaced:
I wish I could remember the exact dimensions you ask about. But I THINK that the separation between rotors was about 3-4 inches. No, I didn't use different incidence on the two sets of rotor blades---might be a good approach! You probably are right that the wash from one rotor affects the other.
Anyway, interesting project. We all will be interested in how it works out.
Bill