There are dual bladed copters (helicopters!) triple, and quadruple bladed vehicles available. However, does any of these designs have inherit advantages?
Is one inherently (or often) more stable? Are any of these designs more energetically efficient than the others? Does one scale more robustly with load?
It's easy to imagine loose mechanical analogies for the behavior (stability) of one or two bladed vehicles - I know what a stool is (for example.) However, the closest I got to seriously studying fluid flow was Engineering Mechanics II.
I actually want to understand what's happening. Can the quadcopter use weaker blades, since it has four working together? It seems power consumed would rise faster than efficiency...
Thanks in advance. I may or may not understand derivations, but it would be cool to see results that describe what's actually happening! I'd love to build one on a hobby level.
I'll be appreciative of as much detail as you can throw at me - I have a few days off and others might like it too!