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Old Jun 07, 2010, 01:46 AM
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Rewinding Scorpion 4035 kit

Hello to everyone.

I have brand new kit of Scorpion 4035 to rewind ( the type of motor is 12 N 10 P ).

I can not decide wich winding should be best for mee ( the target rpm should bee around 480 n /volt.), but only thing wich bothered mee it uses only one tooth forone group of windings.

I chosen between this two winding types :

- Firt option is LRK standard wich useses ewery second tooth, for the target rpm shoud bee, on one toth should bee 11 winding of 1,4 mm cu wire in my case to get right rpm cca 480n /volt

- And the second option is this one ( I gest is dLRK ), wich uses ewery tooth on stator and is constructed by power croco it uses 1,3 mm cu wire but needs for the same rpm/V i need 6+7 ( together 13 windings), wich means the wire is longer and lover diameter in this case and also internal resistans is bigger .

What do you thing is the benefit of the first and the second wiering, what is your recomendation and wich option shoud i chose ? This aplication shoud bee for 12 S heli
I also attached bouth sheme of the windigs to get a better look.

Best regards, and thanx for advices in fronth.
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Old Jun 07, 2010, 05:17 PM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
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Quote:
Originally Posted by HSC2 View Post
Hello to everyone.

I have brand new kit of Scorpion 4035 to rewind ( the type of motor is 12 N 10 P ).

I can not decide wich winding should be best for mee ( the target rpm should bee around 480 n /volt.), but only thing wich bothered mee it uses only one tooth forone group of windings.

I chosen between this two winding types :

- Firt option is LRK standard wich useses ewery second tooth, for the target rpm shoud bee, on one toth should bee 11 winding of 1,4 mm cu wire in my case to get right rpm cca 480n /volt

- And the second option is this one ( I gest is dLRK ), wich uses ewery tooth on stator and is constructed by power croco it uses 1,3 mm cu wire but needs for the same rpm/V i need 6+7 ( together 13 windings), wich means the wire is longer and lover diameter in this case and also internal resistans is bigger .

What do you thing is the benefit of the first and the second wiering, what is your recomendation and wich option shoud i chose ? This aplication shoud bee for 12 S heli
I also attached bouth sheme of the windigs to get a better look.

Best regards, and thanx for advices in fronth.
Hi
In my opinion
LRK 11 turns per tooth and pair and
dLRK 6+7 = 13 turns per pair
have not the same Kv
The difference for the same numberof turns is max 7.5%

LRK 11 is closer to 6+6= 12 dLRK (per pair)
Louis
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Old Jun 07, 2010, 08:03 PM
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manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
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Fourdan.

What is the relationship between a winding KV DLRK and LRK.
I would like to know the data, Excel Add To Turn calculator.
Currently this in this way. and I only need to add this data.

http://www.rcgroups.com/forums/showt...urn+calculator

Thank you very much.

Cual es la relacion de KV entre un bobinado DLRK y un LRK.
Me gustaria conocer el dato, para agregarlo al Excel de Turn calculator.
Actualmente esta de esta manera. y solo me falta agregar este dato.

Muchas gracias.

Manuel V.
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Old Jun 08, 2010, 02:09 AM
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Hello !

So if I have a shorter wire with 0,1 larger diameter, the motor have lower internal resistans ( les heat ), so if I compared this two windings the normal LRK ( ewery cecond tooth ) is better for my use ?

I em corect, or I mising something, where is the cought ?

Hear is my corect measurments normal LRK wit 12 windings per tooth diam 1,4 have 440n/voltDlrk from Power Croco (6+6 2Y) have 530 n/volt.

The langitude of the wire is the same, so if I want to get the same RPM-s I must add 7+7 I gess, wich means I must put the lover ( 1.3-1.2mm) diameter wire and ofcourse longer wire ( two widigs more ), wich mean bigger internal resistans of the engine and more heat.

Regards
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Old Jun 08, 2010, 04:06 AM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
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Quote:
Originally Posted by manuel v View Post
Fourdan.

What is the relationship between a winding KV DLRK and LRK.
I would like to know the data, Excel Add To Turn calculator.
Currently this in this way. and I only need to add this data.

http://www.rcgroups.com/forums/showt...urn+calculator

Manuel V.
Hi Manual
For the same kit, for the same number of turns (per pair)
same magnets, same wire area
Kv LRK (one tooth every 2) = 1 (ref)
Kv dLRK (every tooth) = 1.035 to 1.075
There is some uncertainty due to measurements and windings details
Maybe an average 1.05 could be adopted
Louis
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Old Jun 09, 2010, 01:15 AM
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manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
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Here is the latest version of Turn calculator.
LRK included.
But it is necessary for any engine to find the reference in DLRK delta or star.
http://www.rcgroups.com/forums/showt...2#post15276630

Scorpion On page not found information that suits me for this case.

Manuel V.
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Old Jun 09, 2010, 02:02 AM
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manuel v's Avatar
Mexico, BC, Mexicali
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HSC2.

Using your data for reference.
Powercroco 2groups parallel star 6turn=530 (half parallel.)

LRK 12t,= 440.

check picture for diferents kv with diferents wind.

LRK 11 turns Delta= 477.
LRK 6Turns Star= 505.
HParallel Delta 11t=501
12T=459.

HParalle Star=7t=454
DLRK Delta=6t=459
Fourdan say. 6,7 DLRK Delta for around 492 KV.


Manuel V.
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Old Jun 09, 2010, 03:31 PM
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Hello !

Hear is the measurment of "lerlauf" scorpion 4035 with normal LRK with 11 winding per tooth and 1,4 diam wire.

Your calculations are corect there is exsact 480n/volt.

Regards
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Old Jun 10, 2010, 12:52 AM
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Hsc2.

Very Nice.

Thanks to Fourdan, becouse the relation 1.05 is correct.

Manuel V.
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