Throw the plastic spinner away and do not give it to your friends, this especially so in the training environment. Instead use an aluminium spinner nut; far far better, allows changing a prop in seconds, It fits the starter cone perfectly so there is less likely going to be slippage and best of all they look far better on a trainer or many other types for that matter.

Never slam a running starter aginst any airplane no matter what type of spinner. very hard on engine mounts, airframes and engines. Quite frankly on a busy training day I avoid the pits as its sometimes difficult to avoid the plastic shrapnel from spinners.


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John