HeeWing T1 Ranger Motor Shims

My friend and I both bought HeeWing T1 Rangers. Even after multiple flights of experimenting with CG and trim, the plane tends to climb aggressively with high throttle and nose dives off throttle (assuming trimmed for level flight at 50% throttle).

I've seen this corrected on other planes with some down thrust of the motor mount (it’s very common to have this in RC planes). I started to experiment with different angles and settled on the ones uploaded here. After shim install, correct CG adjustment, and trimmed for level flight at half throttle, your plan should climb mildly on full throttle and have a much more manageable glide slope on zero throttle. I haven't noticed any change in efficiency when flying in autonomous modes with iNav. Thought I'd mention that in case that was a concern.

Note: the attached photo is from an earlier design rev. The final file attached is slightly thicker, which performed better in my tests.

Print:

Print 100% infill with PETG. Print each part twice, for a total of 4 shims. Note one is left and one is right. This is referenced standing in front of the plane, looking at the motors. Specifically, I'm referencing the top screws on the motor, not the left and right motors in whole.

Install:

1. Loosen all 4 motor screws multiple turns.
2. Remove the top right motor screw. Install the shim labeled “R” in between the nacelle and motor mount. Insert the screw and partially tighten.
3. Repeat the previous step for the top left screw with the shim labeled “L”.
4. Now tighten both bottom screws.
5. Finally, tighten both top screws.
6. Repeat these steps for the other motor.

Now fly the plane, trim for level flight at 50% throttle and enjoy the new flight experience!