prop nut
Oh yes. I've seen it too....
Best way to go at it is play it safe, do equipment checks...and keep in mind that even if you know your motor etc...Murfey rules in the end....
Have a good season, I've tried many hobbies and this one is the most rewarding, simply because of something I've built rotating and going up in the sky is the most wonderful sight in the world..
BB1