Quote:
Originally Posted by freebeard
It seems it would be optimal to have a battery pack in the floor to keep the CG low. And twinned contra-rotating propellers to the sides for yaw control.
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Why would you want the center of gravity low? Wouldn't that make things worse? The propellers would have to be mounted even lower or you'd still have that effect from the misalignment between the center of the propellers and the center of gravity pushing the nose down.
But the twin propellers sounds cool to me. It would also allow for smaller propellers so you could center them to the center of gravity better.
In my mind batteries could be placed higher in order to raise the center of gravity in line with the propeller(s).
Another thing I forgot to mention is the effect of momentum. If the propeller(s) are above the center of gravity then acceleration would cause the nose to dive too from inertia.