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Foamies Talk about building, power setups and anything having to do with e-powered foamy planes!

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Old 04-13-2011, 05:03 PM   #1
KenSue
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Default Motor Mount, and Prop Size questions?

I cut an RC Powers Extra 300 out of 1/2" blue core from Lowes. Does anyone know a good way to build a motor mount that will fit an E-Flite 400, and how to mount the mount to the foam?

Any ideas on prop size?
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Old 04-13-2011, 09:36 PM   #2
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Hi, Here is a thread on how to mount motors, there are a few ways to mount your motor, you can cut out a round plywood mount from 3/16 to 1/4" plywood to fit a X Mount, or you can glue in a 3/8" X 3/8" X 2" basswood stick for a stick mount. with the stick mount, make sure that the screws from the mount to the motor dont go to far into the motor and touch the windings. if the stick mount fits the stick loose, wrap the stick with a little masking tape, and soak it with some thin CA, let dry Hope that helps, Chellie

http://www.wattflyer.com/forums/showthread.php?t=39483

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Old 04-13-2011, 10:59 PM   #3
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Thanks again Chellie for the info.

So, how do I attach the mount to the foam? Everything I think of sounds like it might pull out of the foam, and I have not seen one up close to know.
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Old 04-14-2011, 10:48 AM   #4
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Hi KenSue use 5 min Epoxy to glue the the round plywood flat or stick to the foam, cut a slot for the stick mount in the foam and brace it with thin ply or foam, on the round ply motor mount, you can add some triangle foam on the back side for more support it you want. here are some pics to give you some ideas, mount you motor on the stick mount and lay it along side your plane and cut the foam as needed so it will fit, get the motor shaft in the middle of the plane, and add about 3 degrees of down thrust to the motor, no right or left thrust should be needed on a profile foamie, hope that helps, Chellie




http://www.coastalplanes.com/articles/3dx/3dx.htm


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Old 04-14-2011, 02:34 PM   #5
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Again, thank you. You have been very helpful. This is my first foamie, and I just needed to see the actual process of how to mount the motor. I think I'll go with the plywood style for my first try.

What do you think about prop size? The plane will weigh about 10 ounces. I'm running an e-flite 400 (740kv) motor (if I can get it to run after that last crash with a different plane).

Maybe you could help with the motor too. I think the shaft is bent. It runs fine with no prop attached. But, as soon as I tighten a prop it squeals and tries to spin in both directions (effectively just bouncing back and forth). What do you think?

Unfortunately, I don't have a spare shaft right now to check it. But one is on order.
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Old 04-14-2011, 09:34 PM   #6
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Originally Posted by KenSue View Post
Again, thank you. You have been very helpful. This is my first foamie, and I just needed to see the actual process of how to mount the motor. I think I'll go with the plywood style for my first try.

What do you think about prop size? The plane will weigh about 10 ounces. I'm running an e-flite 400 (740kv) motor (if I can get it to run after that last crash with a different plane).

Maybe you could help with the motor too. I think the shaft is bent. It runs fine with no prop attached. But, as soon as I tighten a prop it squeals and tries to spin in both directions (effectively just bouncing back and forth). What do you think?

Unfortunately, I don't have a spare shaft right now to check it. But one is on order.
Hi Motors are cheap, dont even try to fix your motor just toss it away here is a motor from heads up Rc, there is a prop chart with this motor, i think a 7x6 or 8x6 should be fine for your plane, heads up Rc only charges $2.00 for shipping and Jeff ships fast too, Tell Jeff that Chellie sent you Take care, Chellie

http://www.headsuprc.com/servlet/the...0-Sport/Detail

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