HobbyKing.com New Products Flash Sale
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Old Nov 18, 2012, 11:59 AM
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Motor deals!

Check out the motor deals--one of these might be a good fit for you next racer or hotliner project. http://www.neumotors.com/store/page1/page1.html

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Old Nov 18, 2012, 01:42 PM
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What is this MR motor Steve, is it one of yours? How many poles?

Looks like something I'd be interested in. The 5mm shaft is nice for running big power.
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Old Nov 18, 2012, 01:53 PM
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What is this MR motor Steve, is it one of yours? How many poles?

Looks like something I'd be interested in. The 5mm shaft is nice for running big power.
It is a 28mm motor with 4 poles. Same manufacture that made the Medusa motors ....but with some improvements.

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Old Nov 18, 2012, 01:54 PM
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Could I run the 1410/2Y/SE on 4 or 5S on a prop plane ?
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Old Nov 18, 2012, 02:50 PM
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Could I run the 1410/2Y/SE on 4 or 5S on a prop plane ?
Yes-- and since this motor has about the same Kv and resistance as our 1509/2Y you can use the motor calc program to see what different props would do. A 6x6 prop on 5S would pull about 60 amps and have a prop pitch speed of 170mph and give around 100oz static thrust.

http://www.ecalc.ch/motorcalc_e.htm?neumotors

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Old Nov 18, 2012, 05:05 PM
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Are the medusa motors KV corrected to be more accurate now or has the winding changed? Also are they all available in 1/8 shaft diameter?
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Old Nov 18, 2012, 05:46 PM
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All the sale motors have 5mm shafts. The MR028-056-2300 has a Kv of 2590, the MR028-056-1800 is 1925Kv and the 1410/2Y is 1850Kv. I am not too sure how Medusa got their numbers but the above numbers are actual measured Kv for the motors we are selling.

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Old Nov 19, 2012, 04:50 PM
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Do you recommend good Boca bearings? And if its a good idea which one would be good for the 1115/1Y?
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Old Nov 19, 2012, 07:06 PM
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Do you recommend good Boca bearings? And if its a good idea which one would be good for the 1115/1Y?
We use SPB bearings from Japan. Not sure about which Boca bearings are best since they have a wide range of quality.

Older 11XX motors had inch size bearings(.125 inch)--the newer ones have metric(5mm).


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Old Nov 20, 2012, 04:03 AM
Livin it UP when Im goin DOWN
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Not related to the topic of the thread, but since bearings came up:
Steve, I have a 1115/1Y and it has developed a slop in the shaft. I can move it about 2mm in and out, and it runs "hot". Any suggestions?
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Old Nov 20, 2012, 11:38 AM
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Sounds like the brass shim on the front of the rotor has worn and should be replaced. If the rotor moves forward enough the Kv will increase since it is no longer fully covered by the stator which could make it run hot.

If the shaft is not worn then some more shim spacers should be all that it needed--if you want to try fixing it yourself take care when taking out the rotor since the shim washers sometimes get lost in the process of tailing apart. Some heat on the screws holding on the rear end cap helps get the screws free. If you need a few shims and spacers we can send them.

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Old Nov 20, 2012, 11:41 AM
Livin it UP when Im goin DOWN
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Thanks Steve. Will take a closer look at it soon and send you a PM with further questions if necessary and if it's ok with you.
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