ruber band only prop saver

[theriaa]

seems to work good for me so far:

Just slip on the stock washer over the threads to prevent the prop from locking.
slip the prop on 1/2 way
wrap a rubber band (normal (not fat or skinny) AND DOUBLED) around the back of the prop
hook the 2 ends in front of the prop, over the treads (on opposite sides)

this wouldn't work on a smooth shaft (hehe) but, the treads seem to crank the prop and rubber down, and the rubber in back gets really compressed like a rubber washer (no loss in performance)

I,ve only had it on for a day or two, but ive crashed it a lot, and I haven't broken my stock prop, or even the cheap rubber band!

[pvtzemerak]

what does this do? ive seen this but i have no idea, do you fly the plane with the prop?

[cincylunken]

Do you replace the tightening nut back onto the threads in front of the prop or not?

[jt01]

The idea is that in the event of a crash or prop strike that the rubber band will have give and reduce the chance of breaking the prop. There are several versions of prop savers from store bought to home made.

Jim

[cratermaker]

I crash alot, it's the easiest way for me to dig holes in my garden for planting.
I'll have to try this prop saver!
But I must warn you!
I tried to plant the cub, but nothing grew!

[flydiver]

I did use a 'normal' 4mm prop saver on my stock cub. It worked, BUT it's pushing the power envelope for a prop saver. I needed to use double bands or a thick one made from surgical tubing (not O-rings, too weenie) and a nice fit-stable platform, not sloppy. If I used less on the stronger batteries it would sometimes slip off in a tight loop or dive. Made a terrible racket, lost power, and beat the cowl.
But, I never did bend a shaft or ruin a motor but maybe that's because I had a backup (Murphy's corollary-nothing happens when prepared).