Servo-driven drum-brake for Freewing Avanti EDF-plane
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A wheel brake at low weight for EDF-planes. Rim diameter 45 can be used for tires OD60 to maybe OD75.
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- Printables
- Category
- RC & Robotics
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You need O-rings ID33x2,5 mm, ball bearing MR 128 8x12x2,5 and MR 128 8x12x3,5 ZZ.
A servo: MASTER Servo S308.
The Cam may need to be adjusted in size for optimal balance between brake force and the torque of the servo. The servo isn't very strong so make sure the whole 90° of its rotation is used from released brake and up to where you get the braking power required.
I've printed the drum in PLA, slice 0,15, 2 perimeters, 15% gyroid.
The rim (hub-drum) in PETG, slice 0,2, 2 peri, 25% grid.
The tyre, Flexfill98A. slice 0,2, 2 peri, infill 7% gyroid. Too heavy, use foam rubber and save some 7 gram.