dabkb2
Dave Bacon
- Joined
- Sep 26, 2005
- Messages
- 2,787
- Location
- Vista, Ca
- Aircraft
- Sport Copter Vortex 582, 2 KB2 90Mac KB3 582
- Total Flight Time
- 529 hours
Chapter 31 has a college class trying to design a prerotater and this is what they are currently thinking. I have never heard of this before so I thought I would ask the group
We were looking into some design ideas and wondered if we could get your input on some things. We were thinking of putting 2 DC motors on the rotor itself eliminating a drive shaft and balancing the two so as to keep it stable. We were wondering if that's been done before or if that's just not a good idea.
We were also wondering if theres anyway the pilot knows the rotor rpm while flying or if that is something that could be useful. For example, if we use an rpm sensor for calculations, we can also display it to the pilot in a gauge or digital display if that's something you think would be helpful or desirable. Something else we need to do is find the torque required for the rotor. That paper gave us a general idea but we would like to measure the torque ourselves if we can. I remember you or john said you've done that before and I'm not sure if you have the number we need or if it was for a smaller blade length.
Let me know what you think,
Any thought would be appreciated
We were looking into some design ideas and wondered if we could get your input on some things. We were thinking of putting 2 DC motors on the rotor itself eliminating a drive shaft and balancing the two so as to keep it stable. We were wondering if that's been done before or if that's just not a good idea.
We were also wondering if theres anyway the pilot knows the rotor rpm while flying or if that is something that could be useful. For example, if we use an rpm sensor for calculations, we can also display it to the pilot in a gauge or digital display if that's something you think would be helpful or desirable. Something else we need to do is find the torque required for the rotor. That paper gave us a general idea but we would like to measure the torque ourselves if we can. I remember you or john said you've done that before and I'm not sure if you have the number we need or if it was for a smaller blade length.
Let me know what you think,
Any thought would be appreciated