FMS 800mm Beaver Replacement Wing Key / Wing Lock Knob / Main Wing Blot FMSDA013

The FMS 800mm Beaver wing is secured by a plastic quick-release wing key located at the rear of the wing. Since this small part can be easily misplaced during transport or field assembly, I designed a replacement that can be printed at home.

The part has been test-fitted on my aircraft. A small amount of sanding on the tip of the key may be required to allow it to pass smoothly through the wing keyhole. The original part includes a slight angled top surface to match the wing contour; this version omits that feature since it is primarily cosmetic and does not affect function.

Recommended Print Settings

• Material: PETG

• Perimeters: 4

• Infill: 50% Gyroid

• Supports: Organic, Build Plate Only

• Brim: Recommended

For best strength, print the part at approximately a 45° angle using the bottom face of the key as the reference surface. This orientation improves strength in the shaft while minimizing support material and maintaining adequate strength in the locking portion of the key.

If you find yourself searching the grass for a lost wing key at the flying field, print a few extras and keep a spare in your flight box!

Related FMS 800mm Beaver Parts

• Wing Bolt/Key/Knob

• Wing Strut

• Wing Strut Fuselage Attachment Base

• Wing Strut Wing Attachment Mount