leorpard 5692 what kv??

**wparsons** · 05-27-2011, 12:43 PM

KV isn't nearly as important in a car because you can adjust current draw by changing the gear ratio. 45k rpm isn't a problem at all as long as the motor is ok at that RPM.

**sailr** · 05-27-2011, 12:44 PM

Keep the motor around 35K rpm and it will be much happier!

**Brushless55** · 05-28-2011, 03:26 AM

Originally posted by corsamegane

hello

Notice that this material is intended to apply in a car 1/5 and not a boat, will weigh about 26 pounds.
Unfortunately I have not seen much information about thoses motors ... except here!
I would like to have your aid in choosing a leopard 5692.
Above all I want is a system which is cooler, not hot.
I want to have two engines with two esc, 6s and two batteries connected in Parallel.

the specifications of esc:

EZRUN 150A

1.1 Output: Continuous current 150A, burst current 1080A.
1.2 Input: 6-18 cells NiMH / NiCd or 2-6 cells LiPo.
1.3 BEC Output: 5.75V/3A (built-in switch mode BEC).
1.4 Resistance: 0.0002 Ohm.
1.5 Motor Supported: Sensorless brushless motors and sensored
1.6 Suitable Brushless Motor: 6T and> 6T
1.7 Suitable Car: 1 / 5 on-road or off-road cars / trucks race is competitive.
1.8 Size: 68mm (L) * 55mm (W) * 45mm (H).
1.9 Weight: 150g (Without wires)

What engine should I choose without destroying the esc?
I would like to use the 1000kv but maybe I am already asking too much ...
1430kv
1090kv
1000kv
730kv
540kv

Attention is to be twin motors. and twin esc

Thanks for everything and sorry to be asking for information that is not related to boats.

being gas motors run at about 14-17,00rpms depending on tune..
I would choose the 1000-1090kv motor on 6s with a single
it will have monster power from one motor....

that setup in my Baja 5b should get me 50-55mph with my gearing

**wparsons** · 05-28-2011, 06:25 AM

There was a guy at the LHS with a 1/8th scale buggy running it on a 2200kv motor and 6s and he said it was basically uncontrollable.

**corsamegane** · 05-28-2011, 01:45 PM

Hello

This car will be an homemade car and will measure 37 inches long, the wheels are 8 inches in diameter and is to be 4x4 with three differentials.
If I use the 1090kv motor with 6s, give me about 27k rpm and I think it's enough already with the 1340kv motor with 6s, give me about 33k rpm but I prefer an motor with less rpm for running cool.
The two motors is to help make everything run cooler and at the same time have a super torque 4x4, I think I can do something with enough control to make it fun to drive.

Thank you all for your help, now I know I can use this esc with motor that I want!
I think I'll use the 1090kv motor.

I'll leave here some virtual images of what will be the car at the end

**Brushless55** · 05-28-2011, 02:05 PM

That is very cool man!
Even a single 5692 motor will have over 4 1/2hp cont. and a peak of around 6.7hp
More than enough power to push this car to some crazy speeds and still staying cool

**sailr** · 05-28-2011, 02:14 PM

BEAUTIFUL DESIGN! Can't wait to see it finished!!

WHAT is your gearing going to be through the differentials? What ratio? 3.50:1, 6:0-1. etc/ etc/ THAT will determine the KV you need more than anything else.

The way you are saying it is the wheels will be turning 27K RPM? That's nuts.

**corsamegane** · 05-28-2011, 03:02 PM

Originally posted by sailr

BEAUTIFUL DESIGN! Can't wait to see it finished!!

WHAT is your gearing going to be through the differentials? What ratio? 3.50:1, 6:0-1. etc/ etc/ THAT will determine the KV you need more than anything else.

The way you are saying it is the wheels will be turning 27K RPM? That's nuts.

The motor will be turning 27k rpm, not the wheels! I cant give you the gear ratio yet but I want to give a maximum speed from 35 to 40 mph but the car can get there fast.

Here are some images from a petrol car but I was robbed at the end of the project ... never got to run ....

**sailr** · 05-28-2011, 03:04 PM

OK. I feel better now! You could go with a lower KV and gear accordingly and use less AMPS, thus cooler running. Just a thought. You're not shooting for a lot of speed it appears. 35-40mph should be very easy to attain. I'd think with two of the 5692's you could easily hit 60+ would very little strain on the motors!

Lower KV, Higher Volts, produces very low amps. So if you use the low KV motor and 10S lipos, you can get by with a lower amp speed controller. You will have to have a controller for each motor.

**corsamegane** · 05-28-2011, 03:20 PM

Originally posted by sailr

OK. I feel better now! You could go with a lower KV and gear accordingly and use less AMPS, thus cooler running. Just a thought. You're not shooting for a lot of speed it appears. 35-40mph should be very easy to attain. I'd think with two of the 5692's you could easily hit 60+ would very little strain on the motors!

Lower KV, Higher Volts, produces very low amps. So if you use the low KV motor and 10S lipos, you can get by with a lower amp speed controller. You will have to have a controller for each motor.

the problem is that I can only use up to 6s which is what allows the esc.
With the 730kv motor on 6s, would give only about 18k rpm.

**sailr** · 05-28-2011, 03:28 PM

I see. I forgot you were limited to 6S. Your KV choice is probably a good one then.

**corsamegane** · 05-28-2011, 03:50 PM

Originally posted by sailr

I see. I forgot you were limited to 6S. Your KV choice is probably a good one then.

thanks for the tips

**corsamegane** · 06-01-2011, 07:46 AM

Hello

Is just to show a picture of what I intend to do, is still incomplete but it gives me an idea of how it will stay.

When I have any news I post here

**GP73** · 06-01-2011, 11:27 AM

Very cool project, keep us posted!

leorpard 5692 what kv??

leorpard 5692 what kv??

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