I've got the aircraft, I just need the control software. The idea is to maintain control mechanisms through both flight profiles. The rear motors tilt to vertical for the VTOL flight form. I understand there is issue with the position of the forward motor locations. The idea is that they would maintain roll stability in the fixed wing profile. The only active control surfaces would be on the Vtail. Primarily for rudder control.
Of course its all kinda mute since the Osprey has been flying and is in service with the US military already! The original full scale tilt rotor/powered lift in production airplane. I would assume if they thought four motors would be better they would have used them. But two seems hard enough to manage.
Assuming horizontal flight uses a normal wing lift design, there is no need to use all motors. From a efficiency viewpoint you only want to use a single motor when flying as a normal plane.
And regardless of how many motors used in horizontal, you still need to add some tail drag surfaces to give it stability and control.
If you draw the air flow on takeoff, you'll see a big issue - the flow crosses both fuselage and wings surfaces, which will lead to unpredictable vortexes. The airframe design could be optimized using an air flow simulation, but I don't think this concept could be optimized.
For rudder he can use motor differential and for elevator, the back motor can just pitch a tiny bit. I like this design, with most other designs half the motors become useless once in plane mode. With this design all the motors function all the time, so very efficient.
Comments
nice design, It would be fun to see if we could fab it up...
I've got the aircraft, I just need the control software. The idea is to maintain control mechanisms through both flight profiles. The rear motors tilt to vertical for the VTOL flight form. I understand there is issue with the position of the forward motor locations. The idea is that they would maintain roll stability in the fixed wing profile. The only active control surfaces would be on the Vtail. Primarily for rudder control.
Of course its all kinda mute since the Osprey has been flying and is in service with the US military already! The original full scale tilt rotor/powered lift in production airplane. I would assume if they thought four motors would be better they would have used them. But two seems hard enough to manage.
Assuming horizontal flight uses a normal wing lift design, there is no need to use all motors. From a efficiency viewpoint you only want to use a single motor when flying as a normal plane.
And regardless of how many motors used in horizontal, you still need to add some tail drag surfaces to give it stability and control.
If you draw the air flow on takeoff, you'll see a big issue - the flow crosses both fuselage and wings surfaces, which will lead to unpredictable vortexes. The airframe design could be optimized using an air flow simulation, but I don't think this concept could be optimized.
For rudder he can use motor differential and for elevator, the back motor can just pitch a tiny bit. I like this design, with most other designs half the motors become useless once in plane mode. With this design all the motors function all the time, so very efficient.
What about a rudder or elevators in some form.
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