Mounting rubber wheel on motors

[jehan60188]

I am trying to mount rubber wheels on a motor to make a paper airplane launcher
similar to this: http://www.instructables.com/id/Super-fast-paper-plane-launcher/

only, instead of wheels, I'm using rubber stoppers (for flasks)

I've got two questions, 1) how do I attach them to the motor; I'm thinking epoxy, but I'm concerned that it'll drip and lock up the motor
2) should i place the stoppers fat-side-up, and have a fixed space between the two, or should I place them fat-side-down and have a 'valley' for the plane to be propelled through?

any input would be appreciated!

detail pictures:

http://img690.imageshack.us/img690/6825/imag0530i.jpg
http://img847.imageshack.us/img847/4063/imag0529b.jpg

 

[J-Ri]

Epoxy is a good choice, as for keeping it out if the motors, turn the thing upside down so the motors are above the stoppers, gravity should keep the majority of the epoxy out of the motors. It seems like you would want the widest part at the top, so you can use a wider variety of planes, that may not reach to the bottom of the "valley"

 

[Travis_King]

Get it centered. You won't be pushing many airplanes if you've got a cam rather than a wheel.

 

[jehan60188]

Epoxy is a good choice, as for keeping it out if the motors, turn the thing upside down so the motors are above the stoppers, gravity should keep the majority of the epoxy out of the motors. It seems like you would want the widest part at the top, so you can use a wider variety of planes, that may not reach to the bottom of the "valley"

thanks, that's what I ended up deciding to do, pretty much for the same reasons you listed! I've been too busy to get around to actually doing it, but I'll let you know how it goes!

Get it centered. You won't be pushing many airplanes if you've got a cam rather than a wheel.

thanks
how do you suggest I do that?

 

[Travis_King]

That depends on what you've got to work with. It doesn't have to be exact, but you should make an effort to get it as centered as possible.

 

[pantaz]

... how do you suggest I do that?

You might try using a dowel that's a close (but not tight) fit to the rubber stopper's hole. With a dowel a few inches longer than the rubber stopper, you can use that to align the parts and hold them in place until the glue cures.

 

[jehan60188]

updated picture
http://img69.imageshack.us/img69/6403/imag0559c.jpg

unfortunately, when i test it, I can't get much speed, so I think I'm going to have to look into better motors.