Barry,


The imbalance in any single-cylinder engine is quite large.
Much larger, in fact, than on most props.
It is also unsolvable by any conventional means.


Even if your prop and spinner are balanced to perfection, your model will still shake....

The finger-tip $2-$4 balancer is the most you should ever need to spend.


If you want to read more, please do a search in RCU for engine and prop balancing threads.