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Micro props for pager motors?

Old 07-22-2006, 01:04 PM
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Default Micro props for pager motors?

Where can I find 'em? I have a bag full of motors, and no props, and I wanna make a depron DoX...
Old 07-22-2006, 01:11 PM
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Default RE: Micro props for pager motors?

here ya go, this place carries pretty much everything. good people to work with too. http://www.bsdmicrorc.com/products.cfm?catID=10009

what size of motors have you got? if they're the smaller N20s or M20s, or even the coreless pager motors, Gordon Johnson has got some really nice motor tests so you can match your motors and props, gear drives too if you want. http://home.comcast.net/~gordon-johnson/motors.htm

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Old 07-22-2006, 01:28 PM
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Default RE: Micro props for pager motors?

Thanks, MB, I don't know what model they are, as there are no identifying marks on them. One batch is 7mm can with a .040 shaft, the others are 4mm can with flats. These have smaller shafts, but I haven't measured them (look about .032).
Old 07-22-2006, 03:13 PM
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Default RE: Micro props for pager motors?

no problem. if you've got a multimeter, you can check the motors resistances and find out how powerful they might be. the 7mm motors are usually pretty strong and a number of props will work for them. the 4mm motors however are pretty weak, and there's only two props i know that have been produced for them, but they dont have much more than a gram of thrust or so i'd imagine. you can gear a 4mm motor and get a couple grams of thrust though, but either way, they're usually used for living room flyers.

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Old 07-22-2006, 06:06 PM
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Default RE: Micro props for pager motors?

I just bought a dozen GWS 3x.75s from tower. I'll build with the 7mm motors and still have a manageable sized plane, and 10 of them will be a treat to see running in the gym...
Old 07-23-2006, 04:01 PM
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Default RE: Micro props for pager motors?

are you going to run the 3x.75s on the 7mms in direct drive form, or will you gear it? if you go direct drive, you'll probably kill the motor, the props just too big. i think the largest prop i've seen on a 7mm in DD was the GWS 2.5x1 or the bphobbies yellow prop. if you gear it, you can go up to a 5x3 size prop and get loads of thrust from a single cell.

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Old 07-23-2006, 04:48 PM
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Default RE: Micro props for pager motors?

Sorry, my mistake...They're 2.5x.75s. They're the smallest I could get. At least the shaft hole was the right size... Right now I'm making a depron 22" span Shorts Sky Van with a couple of old but unused Scientec 050s spinning Cox 3x1.25s. I don't really do electric, but I have a few odds & ends I've picked up here & there...

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