Angled aluminum motor shims for 450 frame

Hi I'm new to this, but awhile back I designed some shims to tilt the motors 17 degrees. I machined them out of 6061 Al and they bolt to the motor then bolt to the frame. Here's some pics too of them installed. I just wanted to get some feedback on them and see if it's worth making more. I'm also thinking about making them for a 250 frame next. 


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Comment by Drone Tinker on May 5, 2016 at 6:29pm

Seems rather function-less with a traditional frame. Maybe a frame that had a purpose driven shape that could benefit from this motor positioning would offer various advantages. Was there any specific goal you had in mind with this design concept?

Comment by Cala on May 5, 2016 at 6:53pm

HK have something similar for 250, perhaps it helps for fpv and aerodynamic in racers.

Comment by Jonathan on May 5, 2016 at 7:06pm

Yes the reason I made them was for improved aerodynamics at high speeds to level out the quad. I've seen the 250 shims that are 3d printed seemed kinda cheap, but functional. Saw some mixed reviews on them. This design keeps all hardware parallel to mounting surface while staying low profile. I might make some 250's next to try them out.

Comment by Gary McCray on May 5, 2016 at 8:01pm

Hi Jonathan,

Good job, I believe your perception is absolutely right.

These could be useful especially for racing or where high speed forward travel is most important.

That said, the concept would also better benefit from a aerodynamic frame as well.

The Flamewheel frame is one of the least aerodynamic frames made and all the components are non-optimally exposed to the airflow.

For the new little FPV racers, this tilt could easily spell the difference between winning or losing.

It would also be useful for mapping or searching multicopters with the degree of motor tilt actually determined by the desired rate of travel.

It would improve battery life significantly and produce smoother flying conditions.

This is a subject that has not yet been adequately thought about and it is really good to see you giving it an effort.

I would not be surprised to see 10 to 20 percent improvements in performance / battery life under identical conditions versus a conventional copter assuming forward velocity is a major component.

Best Regards,


Comment by Jonathan on May 5, 2016 at 8:39pm

Thanks Gary that is exactly what I was thinking about while making them. I've actually done a few complete quad designs for skycatch and our company Ansync so I wanted to come up with my own ideas to improve certain conditions. Here's another images since I could only upload one at a time.

Comment by Niels G. on May 5, 2016 at 10:28pm

Nice one. 

There is a good use for this type of stuff. In my line of work, I see this in a much bigger scale. On the CH-53 MLH we have the main gearbox tilted by 5 degree to to front so you have a level helicopter at a speed of 140kn. 

First time i see this on a copter

Comment by J. Rivera on May 6, 2016 at 11:44am

Lets us know when you build one for the 250. I volunteer as a prototype tester. 

Comment by Drone Tinker on May 6, 2016 at 4:17pm

Yea, as someone said above. These shims should probably work best with a more aerodynamic frame. Although adjustable tilt controlled with servos would probably be the ultimate solution.


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