I'm designing a VTOL based on a conventional airplane design that will use a tilt-rotor to move the motors 90 degrees around a carbon fibre tube that also acts as the wing spar. Each motor is tilted independently using a servo.
The problem I have is what linkage to use to connect the servo to the motor mount. If the servo arm rotates 90 degrees, since it's not on the same axis as the tube/spar, then it won't be in the same final position moving from horizontal to vertical (it will be in a shorter/lower position).
Here are some photos:
This is the same image as above, with the wing hidden so that you can see the parts. In case it isn't obvious, the servo is blue, control horn white, motor mount black, spar orange, motor red, prop green.
Any ideas as to the best linkage to use here? Please bear in mind the following:
- The servo orientation can't really change as it needs to fit within the wing thickness
- I'd prefer to use standard, commonly-available hobby parts
- The engine mount is 3D printed so I can modify it if required
- I'd like to avoid too much complexity, such as cogs/gears or belts as much as possible