RC Autogyro - Prerotator

Brief Guide:

The easiest setup is the slotted motor mount. I do feel this is slightly less secure as the clamp area is smaller than the fixed hole. Have tested slotted in flight with no obvious signs of loosening or crushing but do keep an eye on it.

Solid gear is heaviest but little rotational air drag.
Holed gear is lighter but more air drag.
Low profile gear is both light and low drag but less rigid.

Solid or holed is safe choice.


M3 bolt for the hinge, 1.2mm wire for pushrod, 9g servo mount.

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9th April 2025

Improved bolted mount design:

Bottom surface is now flat for printing.

Various options for bolthole spacing. This is the distance from the center of the mast axle to the center of the bolted hinge axle. **My build uses 41mm** but others are now provided.

Alternate mount with slot instead of single hole for very fine adjustment of gear spacing.

The "cutout" is to save a bit of weight and printing time. Not vital to have it.

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10th April

"Motor hinged base"