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Overdriven
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12.27.2012, 11:24 PM

An airplane esc generally isn't as smooth as a car esc. The Hobbywing will be more controllable as it is programmed for car use. The reason you see more higher Kv motors out now is because the most popular conversions are buggies and truggies. Most of them are limited to 4s use in the classes they race in and 4s is cheaper for bashers too so higher Kv sells better. All else being equal (including top speed) a lower Kv with higher voltage will be more efficient than higher Kv and lower voltage. Motors like the 11xl needed to be lower Kv with higher voltage to pull around larger trucks like the LST.

The Losi mount has a 43mm diameter so it will take a Castle, Tekin or most any finned motor. But those fins don't contact the mount causing it to hold heat in, plus it's limited in its gearing. If you kept the Kv around 1500 you could run 6s (stock trans gearing) with the Losi mount, but 2200kv you would need to drop down to 4s to keep the speeds and temps in check. I wouldn't recommend the 11xl or similar 36mm motor in the Losi mount.


LST XXL MMM 1717 Custom Fabbed Conversion
   
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Robl45
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12.27.2012, 11:47 PM

so are there any reasonable priced low kv motors you could recommend? otherwise i might end up going 4-5S when this motor burns out.

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Originally Posted by Overdriven View Post
An airplane esc generally isn't as smooth as a car esc. The Hobbywing will be more controllable as it is programmed for car use. The reason you see more higher Kv motors out now is because the most popular conversions are buggies and truggies. Most of them are limited to 4s use in the classes they race in and 4s is cheaper for bashers too so higher Kv sells better. All else being equal (including top speed) a lower Kv with higher voltage will be more efficient than higher Kv and lower voltage. Motors like the 11xl needed to be lower Kv with higher voltage to pull around larger trucks like the LST.

The Losi mount has a 43mm diameter so it will take a Castle, Tekin or most any finned motor. But those fins don't contact the mount causing it to hold heat in, plus it's limited in its gearing. If you kept the Kv around 1500 you could run 6s (stock trans gearing) with the Losi mount, but 2200kv you would need to drop down to 4s to keep the speeds and temps in check. I wouldn't recommend the 11xl or similar 36mm motor in the Losi mount.
   
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Mozzy
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12.28.2012, 01:19 AM

Look for a Leopard 4082 1600kv & you can run 6S. They are sold from Hong Kong on ebay. Free postage too!

The larger the diameter & longer the can the more torque it will produce over a smaller size can with the same kv. So. don't just think a lower kv will improve things without taking into account the can diameter & length.

It is smooth canned & will fit a Losi mount.

I use this in my 1075mm Cat boat running twin 6S in parallel. It goes ok.

http://www.youtube.com/watch?v=eJO5N0Wh4eU


Losi SCTE SC4 Pro 4000kv, Tekin RX8, 2S
MP7.5 Kanai III Tekno Neu 1515/2.5D 1700kv MM 4S
LST 2 Carbon CC 1717 1Y 1580kv MM 6S
Futaba 3PKS Spektrum Pro

Last edited by Mozzy; 12.28.2012 at 01:30 AM.
   
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CerberusVI
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12.28.2012, 04:33 AM

I like how you put that "it goes OK" 1:30 into the video and its screaming across the water! I've been looking into the leopard 4082 1600kv for my conversion. I have a castle 1520 but don't want to keep taking the motor out of my truggy to use it. I've heard good things about it so far

Last edited by CerberusVI; 12.28.2012 at 11:28 AM.
   
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Robl45
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12.28.2012, 10:25 AM

That motor doesn't look bad at all especially for the price. Would anyone here recommend sensored over sensorless or does it not really matter anymore?

Quote:
Originally Posted by Mozzy View Post
Look for a Leopard 4082 1600kv & you can run 6S. They are sold from Hong Kong on ebay. Free postage too!

The larger the diameter & longer the can the more torque it will produce over a smaller size can with the same kv. So. don't just think a lower kv will improve things without taking into account the can diameter & length.

It is smooth canned & will fit a Losi mount.

I use this in my 1075mm Cat boat running twin 6S in parallel. It goes ok.

http://www.youtube.com/watch?v=eJO5N0Wh4eU
   
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