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Old Jan 16, 2010, 08:52 PM
heliav8r is offline
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Question

Easy star prop and adapter for new brushless motor


OK, I got a B2835-2200 brushless inrunner (from Hobbycity) to replace the stock motor and bought a prop adapter to fit the 3.2mm shaft...(the kind with the hex nut). Except that the motor will spin the nut off when power is applied. I am confused....
Looking at the motor, from the tail, the motor should spin clockwise to get the correct wind direction.
I guess what I am asking is..
What prop adapters is everyone using and what props?
Also, where to get them.

Thanks
Joe

Sorry, I know this has been covered, but in reading some of the posts it gets more confusing......
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Old Jan 16, 2010, 10:00 PM
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Motor spins something off??? Any pics?
Old Jan 16, 2010, 10:02 PM
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AND make sure the prop nut is TIGHT

BTW, the motor should spin counter clockwise when looking from the front, towards the tail.
Old Jan 16, 2010, 10:25 PM
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I have the prop adapter tightened to the shaft with the two grub screws and I have tightened the hex nut to the prop.... but.... It seems to me that if the nut was to come loose....somehow... it would spin off. Shouldn't there be a left hand thread on the prop adapter so that technically it would always be tightening?
e.g. motor spinning clockwise, left hand thread would be working against the prop.
right?
Old Jan 16, 2010, 10:27 PM
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Am I just over thinking this? If you tighten the prop down with the hex nut, is that sufficient to keep it in place despite vibrations...etc?
Old Jan 16, 2010, 10:36 PM
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It is the tendency of a pusher to loosen the nut. It turns clockwise, looking from the rear, so that would tend to loose the prop nut. I've never had a problem, but if you are, just use blue thread locker lon it.

I've got an EZ* and I'm about to put the 2700 kv version of the same motor in it.

Remember that with most props, that would tend to tighten them, so it is smart that they're that way.

Unless you've had something fly off, I do think you're overthinking it.

Where in Chicagoland are you, by the way?
Old Jan 16, 2010, 10:42 PM
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Jeremy,
Thanks. I guess I was just erring to the careful side!
Thanks for your suggestions.
Yes, I live just South of Chicago. (Tinley Park) about 50 miles from RLB (I think).

Joe
Old Jan 17, 2010, 04:00 PM
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I use a collet type prop adapter. I get mine from HeadsupRC. $2 flat rate shipping for any size order. Shipping is super quick also.

http://www.headsuprc.com/servlet/the...-3.17mm/Detail
Old Jan 17, 2010, 05:32 PM
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Great!
What props do you guys use? 6x5.5, 6x4?? APC? Master airscrew? Generic?
Old Jan 17, 2010, 06:33 PM
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Quote:
Originally Posted by heliav8r View Post
Great!
What props do you guys use? 6x5.5, 6x4?? APC? Master airscrew? Generic?
with your motor B2835-2200 either of those will work great.
Old Jan 17, 2010, 09:28 PM
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I have the 2700 kv version of the same motor in my EZ*, running on 2S LiPo, and the APC 6 x 5.5 E prop yields 21.5 A, 170 W static. It is within limits, but you didn't say what battery pack you're using. If you're running 2S LiPo, a 6 x 5.5 E is about right. If you're running 3S LiPo, start with 6 x 4E and see where you are, current wise.

Here's a good calculator to help you decide where to start.
http://brantuas.com/ezcalc/dma1.asp

You won't find Turnigy motors in there, but you can usually find something similar enough to give you a good estimate.
Old Jan 18, 2010, 07:23 PM
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I am using a 3s 2200 lipo. So I guess a 6x4E is the way to go with the 2200kv?
Old Jan 18, 2010, 09:54 PM
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That sounds about right. It will still be faster than mine, so be careful. I just maidened mine today, and it climes really fast at full throttle, but is nice for just cruising around at 1/2 throttle.
Old Jan 19, 2010, 01:07 AM
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Quote:
Originally Posted by Jeremy Z View Post
It is the tendency of a pusher to loosen the nut. It turns clockwise, looking from the rear, so that would tend to loose the prop nut. I've never had a problem, but if you are, just use blue thread locker lon it.
...
The SeaBee from Robbe (Pusher) comes with a 3.17mm prop adapter which tightens counter-clockwise.

Jürgen
Old Jan 21, 2010, 02:19 PM
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I use a standard Master AirScrew 6 x4 prop. The prop is put on the shaft backwards. I just use a cheap collet type prop adapter. I run 3 cells on a Mega 16/15/4 and after many a flight have never had the nut come loose. Great performance.

I assume that you are using a washer between the prop and the nut. If not that could be your problem.

Good luck.

Todd


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