I am working on something and have run into a question about mismatched props.
The scenario is trying to balance two props that are not in the same size or pitch but need to work together in one mode of operation and one is shut down in the other mode.
This means basically that both props need to create a balanced thrust in the shared mode. It is fairly easy to pick one RPM for each and so have a thrust and then balance the distance from the balance point to get equilibrium. But this needs to happen across a significant range of power settings say from 50% up to 100% power on both motors.
So how do I build a math model to match and balance the thrust curves. Just for scale one prop is twice the diameter of the other one with half of the pitch. The smaller prop is higher in pitch to be used during high speed cruise. The larger prop will be shut down and folded during cruise.
The goal is to create a throttle or speed controller to do the synchronizing when both props are turning.
The scenario is trying to balance two props that are not in the same size or pitch but need to work together in one mode of operation and one is shut down in the other mode.
This means basically that both props need to create a balanced thrust in the shared mode. It is fairly easy to pick one RPM for each and so have a thrust and then balance the distance from the balance point to get equilibrium. But this needs to happen across a significant range of power settings say from 50% up to 100% power on both motors.
So how do I build a math model to match and balance the thrust curves. Just for scale one prop is twice the diameter of the other one with half of the pitch. The smaller prop is higher in pitch to be used during high speed cruise. The larger prop will be shut down and folded during cruise.
The goal is to create a throttle or speed controller to do the synchronizing when both props are turning.
