Tricopter Simple Yaw Mount
A hard landing recently put the yaw servo out of action on the tricopter. The yaw mount was a block of solid pine with two pieces of piano wire connected directly to the servo arm. It was overly complicated and had a bit too much slack in it for my liking. The yaw servo needed replacing so it's as good a time as any to "upgrade" the yaw mount.
The Super Simple yaw mount takes the blade grip from a 500 size heli, along with some linkage balls and rods, and combines to make a simple, cheap and slop free yaw mount. There's not much too the construction of the mount as shown in the photo. Probably the hardest part is drilling a hole down the centre of the 12mm x 12mm oak arm that's in line with the shaft. Any deviation from centre will result in a skewed motor or even worse, drilling through the outside of the shaft. Cut some 1/4" ply with some 3mm ply glued on top to make up space between the blade grip arms. The replacement servo is a cheapy HXT900 and seems to be doing a good job so far.
This configuration has had about 10 flights put through it. The only problem was the linkage arm popped off after a particularly bouncy landing. Although thats probably a better result to the alternative of probably stripping the servo gears that a traditional push-rod link may have caused.
OLD YAW MOUNT
NEW & IMPROVED SUPER SIMPLE TRICOPTER YAW MOUNT
January 30th, 2014 - 08:59
How did that 9 gram plastic geared servo turn out. I want to use one, but I’m too afraid it will break. Was it strong enough?
January 31st, 2014 - 19:45
It worked fine but I didn’t fly with it much because I built a quad soon after and haven’t flown a tri since.