Actually... its the compressibility of the spinner backplate... Soft plastic that compresses and squeezes out from under the prop. If you tighten it to the point of maximum conpressibility with a wood prop... you crush the prop hub. (that's why plastic props can solve it...)
Hmm, even if your theorey made any kind of sense at all, who mentioned anything about changing the spinner or backplate. This is a rediculous comment.
I think H02zoo has the correct answer.
ORIGINAL: ho2zoo
the reason a nylon (plastic) prop helps keep the nut from coming loose is that it does not crush down when you tighten the nut, unlike a wooden prop. That's the main reason I don't use wooden props.
ORIGINAL: FHHuber
If you back-flip correctly, then the engine will start forward, and you have virtually no risk of getting a finger whacked. (no electric starter... no chicken stick... you can even give the spinner a quick backward twist and start most .61 and smaller engines.... the engine will kick the spinner out f your fingers and start right up... you can't backflip too far this way.
A wise ole bird like you recommending this on a beginners forum? Whats the matter with you?
When I got my first engine last fall, I started mine that way. I back-flipped it "correctly" for the first 10 times, worked great! Too bad the engine tried to start backwards the 11th time and sent me to the ER for stitches.
This is a strange recommendation coming from the someone so safety conscious. Refer back to your "Lets talk about Safety Thread".
ORIGINAL: FHHuber
Interested in seeing beginners succeed without someone going to a hospital along the way.
The only way to reach that goal... get the word out about what isn't safe. No better time to learn safe operation of the model than... while learning to fly it.