ORIGINAL: Turk1
I think apc made an 18x12 wide hub for the 4 bolts
I wish manufacturers produced the smaller gassies with a single prop nut. It would open up a wide array of apc props in this size range, all reasonably priced
NGH 35 is a single prop nut engine.I have heard many multi nut hubs failed on air(broken totally in a second) but none for single nut shaft yet.
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That's just not so. Single nut shafts have broken before, often right at the threads. If you have been in this hobby for over 40 years as I have, you seen the good, bad and ugly
I prefer singles from simplicity and weight points of view. Precisely drilling 4-6 bolt holes in a prop hub isn't difficult if you have a drill press but is completely not necessary for anything smaller than about 80cc. That number of bolts is much heavier than a prop shaft extension and a single nut to hold the prop