Homebuilt ROVs Forum

Has anyone ever tried mounting TWO props to one motor?
For example, mount a LH thread and a RH thread to the same motor shaft, so that when the motor spins forward, you get optimal thrust on one of the props, and when it spins in reverse, you get optimal thrust on the other prop?

Perhaps you might sacrifice max thrust in each direction, but you main gain a more equal thrust ratio in each direction of movement?

Thoughts?

Actually we had the same thought when we were trying fans from PC power supplies as props.
We never tried it though, as we thought that the two props (Left and Right) will push water in opposite directions when put on the same motor.
I would expect to lose a lot of thrust (actually to remain more or less at the same place even at FWD or RVS).

Still, it would be interesting to try it to see how it behaves.