I would check the straightness of your motor stick. Earlier in the season, I was having issues with the motor bunching up when the motor was near its max number of winds. I later found that the motor stick had a very slight warp inwards (towards the rubber motor), causing it to catch near the middle of the motor stick. I found that it's easiest to check its straightness by using the corner of a table; this is because you cannot put it directly in the middle of a table due to the two front hooks sticking out, but if you put it on the corner, you can compare the straightness of your motor stick to the flatness of the table. I had to rebuild mine from a new sheet of balsa because the cement I applied had permanently stuck it in that warped position. If you have a perfectly straight motor stick, these issues should be much reduced.kaziscioly wrote:Has anyone else experienced problems with the knot on their rubber motors? Sometimes when we're flying it looks like the knot gets stuck on the side of the motor stick and stops our bottom rotor from rotating freely (independent of the motor stick). Any advice / solutions?
You also just might not be tying the knot tightly enough, or you might be leaving too much excess. I always make sure to pull fairly hard on the ends of the rubber when tying the 3-step knot to ensure that it is tight as well as small (but not pulling hard enough to begin damaging the rubber, of course). Also be sure to cut off as much excess as you can. If your knot is tied correctly, you should be able to cut it off right up to the knot with scissors and not risk the knot slipping.