I use small zip ties, one on each side and trim the ends, works great, will not flex, but they snap of stressed during a prop strike. I had an o-ring fail on a micro aerobatic plane, the prop had enough gyroscopic mass that when I pulled hard manouvers the plane would move but the prop would stay in place and the o-ring would flex and fail.
Originally Posted by Pat Daily
I have a question for users of the E-Flite 250---how do you get the darn O ring and prop mounted when the cowl is on the plane? Are there any special tools you use to do it? I have a devil of a time with it.