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help attaching props to astroflight firefly motor shaft

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help attaching props to astroflight firefly motor shaft

Old 03-10-2004, 10:30 PM
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supa phatty J
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Default help attaching props to astroflight firefly motor shaft

hi all. i am on my university's mav team.

we are having troubles finding a surefire way of ensuring our props stay on our planes. we think we will have it...go to test flight...do a last pre-flight throttle check...prop starts flying away...

like the title says, we use astroflight firefuly motor and currently have been using a u80 prop. we have been taking the gear off the motor shaft and have tried friction fits, ca/epoxy, and can't really get a way to guarantee our prop stays on...

any insight/advice/experiences are most welcome!

cheers!
Old 03-11-2004, 02:21 AM
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Mike Taylor
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Default RE: help attaching props to astroflight firefly motor shaft

Have you tried LocTite? That's work pretty well in the past.
Old 03-13-2004, 08:46 AM
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Greg Covey
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Default RE: help attaching props to astroflight firefly motor shaft

The AF Firefly uses a 4:1 gearbox that has a 2mm shaft. There are several places that sell a 2mm prop adaptor.

One example is the MJ4700 Collet Prop Adapter for 2mm shaft for M5 prop holes at [link=http://www.hobby-lobby.com/propadap.htm]Hobby Lobby[/link].

Another place is [link=http://www.bmcproducts.com/]BMC Model Products[/link].

I have adaptors from both places and they keep the prop on perfectly.

The 3x1 U80 prop is too small for proper current draw on the AF Firefly. Use a 5x4 prop like the Gunther plastic "spoon" prop commonly used on Speed 400 Zagi wings. Expect an 800mAh draw at full throttle. I use a 2-cell Kokam 145mAh pack on my setups.

Good luck!

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