Cheap and simple brakes ... anything handy I can share.

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Do you fly from a concrete runway? These brakes keep your aircraft from rolling at idle throttle.

When I started flying at my new club which has a concrete runway, I was advised to add a piece of silicone fuel tubing to my wheel axles. This gives the wheels some friction similar to the resistance they have on a grass field, thus preventing your aircraft from rolling at idle throttle. The piece of silicone fuel tubing worked fine, but was worn out already after one day of flying. So I developed the idea into something more durable.

For wheel axles I use these long M5 hex head bolts with short thread which I bought from a specialized hardware firm. They are perfect for wheel axles and they look good! The other pieces in their order are:

Parts of the brake

The 'brake' is on the outside so the wheel is closest to the leg. The big stainless steel washers prevents the nyloc nuts from being forced into the soft aluminum. Nylon washers are produced in two thicknesses; use the ones of 1 mm. thick, not the thin ones.

Turn the first nyloc nut onto the bolt to where the wheel stops rolling freely. It's a light friction you need, not braking. The wheel must be easy rotatable by hand. Make sure both wheels feel the same.
When you mount the wheel axle to the leg, you must only turn the second nyloc nut and keep the bolt and first nyloc nut still; otherwise you loose the friction adjustment. When ready, check the wheels again for equal friction.