dryhiker
Member
Ok, it happened a second time! I glued in a servo only to find it totally frozen. Actually it was fried, baked, cooked, or somehow melted inside by the glue. I applied a sparing dot, but that was still too much heat for this tiny servo.
My plane is a Sparrow, and after a number of crashes one of the servos came loose. That has also happened a couple of times. The glue adhesion to the plastic is a little iffy. I generated a fix, and will make a request to Flite Test as a result.
This fix takes care of both problems, and doesn't make a build that much more complicated. My request to Flite Test is to include a couple of cutouts in the Quick Build Kits shaped like below. The servo next to the cutout is the dead servo, used in this case to prototype the updated mounting method.
Below is the servo glued to the mount by the ears, which keeps the heat away from the gears and other internal parts. I know, I mounted the servo backwards in my haste, but because this was only for strength testing, I didn't tear it apart and start over. At this point there are a couple of options. It is possible to leave the parts which go under the ears too long, and easily trim flush with the servo using a knife extended long from the handle. In addition, for Aileron servos, like in the Tiny Trainer, the back can be cut off flush with the servo as well. It really doesn't add much at this point. Applying a little less glue here is also a good idea to facilitate any of the trimming which may need to take place.
The next photo shows a test piece acting as a fuselage wall. The glue is applied to the foam only and the servo is glued to the fuselage by this mount. I tried pulling, twisting, pushing, but that servo is STUCK to the fuselage! I was surprised at the strength.
I will mount servos this way if I am faced with gluing to the servo body in the future. Has anyone else seen the same problems? I hope this helps.
Andy.
My plane is a Sparrow, and after a number of crashes one of the servos came loose. That has also happened a couple of times. The glue adhesion to the plastic is a little iffy. I generated a fix, and will make a request to Flite Test as a result.
This fix takes care of both problems, and doesn't make a build that much more complicated. My request to Flite Test is to include a couple of cutouts in the Quick Build Kits shaped like below. The servo next to the cutout is the dead servo, used in this case to prototype the updated mounting method.
Below is the servo glued to the mount by the ears, which keeps the heat away from the gears and other internal parts. I know, I mounted the servo backwards in my haste, but because this was only for strength testing, I didn't tear it apart and start over. At this point there are a couple of options. It is possible to leave the parts which go under the ears too long, and easily trim flush with the servo using a knife extended long from the handle. In addition, for Aileron servos, like in the Tiny Trainer, the back can be cut off flush with the servo as well. It really doesn't add much at this point. Applying a little less glue here is also a good idea to facilitate any of the trimming which may need to take place.
The next photo shows a test piece acting as a fuselage wall. The glue is applied to the foam only and the servo is glued to the fuselage by this mount. I tried pulling, twisting, pushing, but that servo is STUCK to the fuselage! I was surprised at the strength.
I will mount servos this way if I am faced with gluing to the servo body in the future. Has anyone else seen the same problems? I hope this helps.
Andy.