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Old Sep 30, 2012, 08:27 PM
The Last Question
Entropy76's Avatar
United States, UT, West Valley City
Joined Oct 2006
541 Posts
Could you show some pictures of the custom stator shaft you made?

Thanks.
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Old Sep 30, 2012, 08:38 PM
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Hampton, VA
Joined Mar 2009
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NC,

Don't have skills or tools to do a re-wire. So if you do a limited run, like Mcross, i'm in for two.

Ksqm
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Old Sep 30, 2012, 11:02 PM
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United States, TN, Jackson
Joined Mar 2007
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Quote:
Originally Posted by Entropy76 View Post
Could you show some pictures of the custom stator shaft you made?

Thanks.
And the vid of the rewind!!!......GREAT JOB!!!...She's a HOTTIE!!!..


Kevin
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Old Sep 30, 2012, 11:06 PM
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United States, TN, Jackson
Joined Mar 2007
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Originally Posted by Slaanesh View Post
They are awesome motors.

Tell me, instead of rewinding, how about simply using 4S on the stock motor?
I've run the stock motor on 4S without issue---But if you can rewind the motor for MORE power with one less cell on 3S without heat issues---This is the way to go...ike having your cake and eating it too!!!......

Looking forward to the motor rewind vid!!!

Kevin
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Old Sep 30, 2012, 11:22 PM
Team30 Micro EDF
NitroCharged's Avatar
Adelaide, Australia
Joined Apr 2004
11,207 Posts
As luck would have it, I used this motor build to do the rewind video so have captured a few frames where the custom shaft can be seen.







I'm pretty sure this could run on 4S too - even if it were for short bursts as 37 is well short of the 60 I like to have as an upper limit. The higher in thrust you go with these - the harder it becomes to get more out of them.

I remember on my Diablo tests, it was the current that cooked the lead wires on 4S when I went real hot o the winds. The wire wasn't thick enough to carry it.
.
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Old Oct 01, 2012, 05:08 PM
Addicted to building...
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Omaha Nebraska
Joined Feb 2006
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Fred
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Old Oct 01, 2012, 05:21 PM
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USA, WA, Bremerton
Joined Mar 2009
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Extremely impressive as always.

I don't know how you do what you do. I know that the manufacturers (HH, GP, and GWS) monitor this forum or we would never have the sabre, mig or the 30mm fans. Thank you Nitro for being a leader in this field. I don't think we would have this great modeling technology without your continuous pushing of the the envelope, showing what can be done.

Keith
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Old Oct 05, 2012, 11:48 PM
Team30 Micro EDF
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Adelaide, Australia
Joined Apr 2004
11,207 Posts
I just finished rewinding another one with 4 strands of 34AWG wire and 6 turns, terminated in Delta.

New kV is 11,700kV. At 7.3 volts. RPM's were 85,740 unloaded. Now to stick it in a 30mm case and strap a suitable rotor on it!

So dropping 2 winds increased kV by 2400. Dropping it by 3 winds increased kV by 4300.

I redid kV readings on 3 different motors this morning and came up with an average of 7400kV. I must have got a pretty good dud that I first measured at 6600kV and would explain why my model wouldn't fly on 2S.
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Old Oct 06, 2012, 08:04 AM
Fear me, I'm a space-duck.
hanzie's Avatar
Nederland, GE, Wageningen
Joined Nov 2011
288 Posts
Daaaaaayumn! 200 grams?! Now that's scary!
I suddenly feel the need to rewind mine now...
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Old Oct 06, 2012, 02:06 PM
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Jacques.Eloff's Avatar
United Kingdom, England, Cobham
Joined Oct 2007
545 Posts
Quote:
Originally Posted by NitroCharged View Post
On 2S - the unit produces 100g of static thrust at 5A.
On 3S - the unit produces 210g of static thrust at 10A. Temp after WOT for 1 minute was 37C. Barely warm.

eflux calculates at ~100mph on 2S, ~140mph on 3S with an 85% reduced tailpipe! Using a 325mah lipo (I recommend TP G6) would give around 4 and 2 minutes of flight respectively, at WOT.
Nitro - this is awesome - compared to other 30mm setups it looks really good. It even beats the KP32, and is around half the weight!

One question - I have assumed your lipos are holding up to a nominal voltage of 3.7V/cell in your tests, for the purpose of calculating Watts. Is this right?

Jacques
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Old Oct 06, 2012, 02:28 PM
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United States, FL, Sebring
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Nice!

That might be just the ticket for the micro ME-262
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Old Oct 07, 2012, 12:23 PM
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chester2240's Avatar
United States, CO, Westminster
Joined Jul 2011
575 Posts
Instead of using the GWS housing and having to make a custom shaft can we use this 30mm housing http://www.hobbyking.com/hobbyking/s...mm_system.html ?
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Old Oct 07, 2012, 01:35 PM
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United States, FL, Sebring
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Quote:
Originally Posted by chester2240 View Post
Instead of using the GWS housing and having to make a custom shaft can we use this 30mm housing http://www.hobbyking.com/hobbyking/s...mm_system.html ?
If that housing is anything like the AEO 30mm housing I have, that large center hole is a bearing tube mount. Even though it shows a bolt spacing of 12mm, if you look close the center support is quite thick. I don't see a traditional mounting arrangement on that case. I could be wrong, but that sure looks like the standard AEO housing. Perhaps the case's motor mounting area could be machined down?
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Old Oct 07, 2012, 03:08 PM
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chester2240's Avatar
United States, CO, Westminster
Joined Jul 2011
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Im pretty sure it is the AEO 30mm housing but couldnt the middle bearing housing just be cut out?
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Old Oct 07, 2012, 03:16 PM
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United States, FL, Sebring
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Quote:
Originally Posted by chester2240 View Post
Im pretty sure it is the AEO 30mm housing but couldnt the middle bearing housing just be cut out?
The problem is the thickness, not the center hole. A Regular fan mount is probably only 2mm thick at most, the AEO is probably 8mm thick. it would take an abnormally long prop shaft with really long screws and that would create other problems. Cutting it out is sort of the idea but it would need to be ground down so that it's much thinner.
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Last edited by Joe 1320; Oct 07, 2012 at 04:02 PM.
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