I’m running some numbers through ecalc to get an idea of the motor/prop combo that would suit my needs (duration and stability over speed and manoeuvrability), and as we know the larger the prop the better [citation needed]
Anyway, my quad airframe has a separation of 15.55 inches between motors, but I’m not sure that if I put 15" props on, a half inch separation would be sufficient. I read a paper saying that there’s some evidence of vortex interference which might decrease efficiency, but what I’m interested in is if there are any practical problems having such a small gap.
Any thoughts or advice welcome.
