Leopard 4082 1500KV

[Shaun78]

Justin, i know thats the motor u got. What prop works best? M645? What size cooling jacket did u get? I was looking at the 1520 castle but tough to get so it seems that your leopard is another GREAT choice and im new to this so I dont know what to get so i imight as well get one that works.

[dag-nabit]

Just a heads up Shaun, the Leopard motors in the 1400 to 1700kv range are getting hard to find as well. 3674mm and 4082mm cans.

Himodel has 4074 1400kv and 4082 1450kv in stock

Kevin

[Shaun78]

Thanks

[Shaun78]

if i cant get that one what is one step up faster from the Leopard 4082?

[Shaun78]

I have no idea on motors. The more the KV the better? Any good reading on this because I have NO idea about what motor will work. I know the Castle 1520 makes the Spartan go over 60 and the Leopard 4082 1500kv will do mid 50's

[dag-nabit]

Kv means RPM's per volt

1500KV times 22.2 volts nominal (6S) = 33300 rpm

Higher Kv's more rpm's but less torque, Lower Kv's less rpm's but more torque.

Going with a lower Kv rating can be compensated to some degree by having the torque to turn a bit larger prop.

The other number is one method of sizing the motor.

A 3674 is 36mm diameter and 74mm long.

A 4082 is 40mm diameter and 82mm long.

Kevin

[Shaun78]

So would the leopard 1450kv 4082 motor run faster than the 1500kv. If they are hard to find I'm sure more are on the way. I know the 50mm water jackets are out of stock and the 40mm are hard to find.

[dag-nabit]

So would the leopard 1450kv 4082 motor run faster than the 1500kv. If they are hard to find I'm sure more are on the way. I know the 50mm water jackets are out of stock and the 40mm are hard to find.

The 1450 would run slightly slower in rpm, but probably not really noticeable.

Just multiply volts x Kv rating to get rpm.

1500 x 22.2 = 33300 rpm
1450 x 22.2 = 32190 rpm

And, yes, stock should be replenished, just a matter of when.

Kevin

[Shaun78]

I need to use the plate you made for me so I need to modify something

[bbosncali]

so my leopard 4074 2200 should put out 48,840 rpms at 22.2 vlts wow!!!! What about watts though? I know my 4074 puts out 2600watts and the 4082 puts out something like 3500 where does that factor in?

[bbosncali]

Ok shaun so your set up right now 1500kv x 22.2 puts out 33,300 rpms my boat on 4s 2200kv x 14.8 puts out 32,560 should be a good race

[dag-nabit]

so my leopard 4074 2200 should put out 48,840 rpms at 22.2 vlts wow!!!! What about watts though? I know my 4074 puts out 2600watts and the 4082 puts out something like 3500 where does that factor in?

Watts = amps x volts, so you need to know your average amp draw to calculate average watts.

watts is the measure of electrical power. So the 3500 watt 4082 is more powerful than the 2600 watt 4074.

If the voltage is constant, the 4082 is going to draw more amps to produce the additional wattage.

Going old school, it is similar to comparing a 327 small block to a 396 big block. The 396 is a more powerful engine, but it burns more fuel producing that power.

Kevin

[Shaun78]

Is the 4082 1450KV another good choice. Traxxas recommends 17-1900KV I think. 1450 isnt too torquey is it?

[Brushless55]

Is the 4082 1450KV another good choice. Traxxas recommends 17-1900KV I think. 1450 isnt too torquey is it?

I would not listen to traxxas on this

the 1450kv could be a great choice on this hull running 6s
you would need to prop up to get some great speed

[dag-nabit]

I would not listen to traxxas on this

the 1450kv could be a great choice on this hull running 6s
you would need to prop up to get some great speed

HiModel has some Leopard 4082 1600kv coming into stock Apr 05.

Those would also be a good fit. Same Kv as the stock motor, but more powerful.

Kevin