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Thread: Leopard 4082 1500KV

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    Default Leopard 4082 1500KV

    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.

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    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

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    Thanks

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

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    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

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    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

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    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.

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    Quote Originally Posted by Shaun78 View Post
    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

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

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    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?

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    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

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    Quote Originally Posted by bbosncali View Post
    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

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

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    Quote Originally Posted by Shaun78 View Post
    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
    .NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

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    Quote Originally Posted by Brushless55 View Post
    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
    Last edited by dag-nabit; 04-01-2011 at 06:56 PM.

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    Who's Model? Would the spartan be faster on 1450 KV or the new 1600KV coming out? i want a faster max speed so I can run the boat with packs forward and strut level or so in order to get no or limited death wobble and still hit mid 50's or so comfotable. but high 50's to 60 maxed out. That would be ideal i think

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    Quote Originally Posted by Shaun78 View Post
    Who's Model? Would the spartan be faster on 1450 KV or the new 1600KV coming out? i want a faster max speed so I can run the boat with packs forward and strut level or so in order to get no or limited death wobble and still hit mid 50's or so comfotable. but high 50's to 60 maxed out. That would be ideal i think
    well you would need to prop up on the 1450kv and smaller with the 1600kv
    so your speeds could actually be the same in the end
    .NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

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    Quote Originally Posted by Shaun78 View Post
    Who's Model? Would the spartan be faster on 1450 KV or the new 1600KV coming out? i want a faster max speed so I can run the boat with packs forward and strut level or so in order to get no or limited death wobble and still hit mid 50's or so comfotable. but high 50's to 60 maxed out. That would be ideal i think
    Shaun, HiModel is an offshore hobby shop similar to Hobby King.

    Just google the name. You need to create an account on their site to get the best prices.

    And as Brushless said. The 1600kv motor will run at a higher RPM. So with the same size prop the 1600kv would be a bit faster.

    You can go to a larger size prop and get similar speeds out of the 1450kv.

    Remember though, that it isn't always about top end speed. For sport boating you want good speed, good handling, and the ability to get quickly back on plane coming out of a tight corner.

    It's about finding a good balance.

    Kevin
    Last edited by dag-nabit; 04-01-2011 at 07:06 PM.

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    Quote Originally Posted by dag-nabit View Post
    Shaun, Remember though, that it isn't always about top end speed. For sport boating you want good speed, good handling, and the ability to get quickly back on plane coming out of a tight corner.

    It's about finding a good balance.


    Kevin
    very good comment, I my self forget this from time to time..
    .NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

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    Quote Originally Posted by Shaun78 View Post
    Is the 4082 1450KV another good choice. Traxxas recommends 17-1900KV I think. 1450 isnt too torquey is it?
    I agree with BL55, we all see what's Traxxas's recommendations have let too. I read there manual on the spartan and I don't agree with it at all.

    Straight from there manual: http://traxxas.com/sites/default/fil...8_manual_0.pdf page 23
    Traxxas recommends a motor with a kV rating of 1600-1800
    kV
    They recommend 1800kv? On 6s (stock can run 6s and they don't tell you not to run when going to a higher kv)? Seriously?!? You recommend people to run a 1800kv on 6s thats around 40k unloaded rpm. That is TERRIBLE advise! They don't recommend a motor size either, so some new guy is gonna go grab a 1800 540xl motor (that's the size of the stock motor so they don't know any different)and run it on 6s and blow his whole system up. This is pretty much a sport boat 1600 on a 6s with a 540xl motor is just not good. 1500 would be more reasonable or lower kv with higher voltage with a 540xl can. JMO of course. I wouldn't listen to Traxxas though. If you want to run 6s a Leopard 4082 1500kv would be a great setup and add a HV esc so you aren't pushing something like a seaking 180 to the limits. A CC ice 240 would be awesome in this hull as well. I would reinforce the hull best you can. If only a matter of time before the plastic hull starts to show wear and tear of running at those higher speeds.
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    i was going to get the Turnigy,Hobbywing 180amp ESC. I can get the 1450Leopard for a good price thats why i was asking. The T180 ESC will handle this right (1450,1500 or 1600KV whatever I get)

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    thats my other issue, i wanted to keep stock. I dont want to spend all my time replacing hulls,flex shafts etc because i am running too much power. I would be happy with 50 or low 50's with great reliability. (i am going to try a P220 on stock setup,see if i can reach 50 that way)

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    Quote Originally Posted by Shaun78 View Post
    thats my other issue, i wanted to keep stock. I dont want to spend all my time replacing hulls,flex shafts etc because i am running too much power. I would be happy with 50 or low 50's with great reliability. (i am going to try a P220 on stock setup,see if i can reach 50 that way)
    Make it short if using the stock motor, that prather prop has a good bit of pitch and on a less then effecient 2 pole motor things are gonna heat up QUICK! If you are a sport boater (just for fun, not racing) don't let speed chasing get the best of you.. Just my 2 cents.....
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    Quote Originally Posted by Shaun78 View Post
    i was going to get the Turnigy,Hobbywing 180amp ESC. I can get the 1450Leopard for a good price thats why i was asking. The T180 ESC will handle this right (1450,1500 or 1600KV whatever I get)
    The esc will handle the motor, I don't like pushing esc's to there max voltage (personel thing). Some people have ran 6s on those esc's without ever having a problem. Others have blown on plug in, where I stand is I will never find out which is what because I don't ever plan on trying it. That's just me...
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    Quote Originally Posted by Diesel6401 View Post
    The esc will handle the motor, I don't like pushing esc's to there max voltage (personel thing). Some people have ran 6s on those esc's without ever having a problem. Others have blown on plug in, where I stand is I will never find out which is what because I don't ever plan on trying it. That's just me...
    what is your choice of esc for these bigger thumpers?
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    u r saying the T180 esc is maxed out on 6S with those motors? it seems thats what everyone is using with upgraded motors and I havent heard on any ESC's blowing up unless its the stock traxxas one. OR were u referring to the stock setup? I could also try an X642 prop on stock setup. This boating thing is making me crazy...maybe traxxas will come out with a better motor esc combo on version 2 and hook us all up that have generation 1????? wishful thinking on my part

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    Quote Originally Posted by Brushless55 View Post
    what is your choice of esc for these bigger thumpers?
    5s a seaking 180
    6s a HV esc, Ice 240 or a swordfish 240. I have/will be running a Ice 240 with my CC1717 on 6s2p. Also I think 2p setups would be a must for the bigger motors.

    Quote Originally Posted by Shaun78 View Post
    u r saying the T180 esc is maxed out on 6S with those motors? it seems thats what everyone is using with upgraded motors and I havent heard on any ESC's blowing up unless its the stock traxxas one. OR were u referring to the stock setup? I could also try an X642 prop on stock setup. This boating thing is making me crazy...maybe traxxas will come out with a better motor esc combo on version 2 and hook us all up that have generation 1????? wishful thinking on my part
    Yes (VOLTAGE WISE). The amps is not why I suggested moving to a different esc. The voltage is why I suggested that. The esc is rated at a max of 6s. I don't run any of my esc's at there max voltage. I have seaking 120s, 180s and I never run them past 5s. I also have/had swordfish 120s and 200s and same thing I never run them past 5s.

    I run a T180 with a Leopard 4074 also ran it with a Feigao 580 never had a issue. I even pulled A CRAP load of amps in that esc without ever having a issue, but I never pushed it past 5s.... Esc is pretty old and still ticking hard!
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    The Castle HV and ICE. Those things are like 300 and up. I dont have it in me to spend that kind of dough on a speed control to go 10mph faster. just me though

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    Quote Originally Posted by Shaun78 View Post
    The Castle HV and ICE. Those things are like 300 and up. I dont have it in me to spend that kind of dough on a speed control to go 10mph faster. just me though
    That was my mind set as well, I looked at better ESC's, but wasn't prepared to spring that kind of bucks on one.

    Diesel's philosophy is sound, for any type of equipment, if you don't run it maxed out it is easier on the equipment.

    But I'm going to do as others already have, run a T180, 4 pole motor, and 6S.

    One would hope these ESC's have been designed with a bit of safety factor built in so they will operate reliably at the claimed specs.

    Kevin

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    Quote Originally Posted by dag-nabit View Post
    That was my mind set as well, I looked at better ESC's, but wasn't prepared to spring that kind of bucks on one.

    Diesel's philosophy is sound, for any type of equipment, if you don't run it maxed out it is easier on the equipment.

    But I'm going to do as others already have, run a T180, 4 pole motor, and 6S.

    One would hope these ESC's have been designed with a bit of safety factor built in so they will operate reliably at the claimed specs.
    Kevin
    uhm can you say traxxass

    the T180, many are having great runs on 6s with no issues at all..
    D just plays things on the more safe side.. I'm acutally thinking of running my PT Hydro on 5s now with this T180 esc on a CC1717 and using a bigger prop to get the same speeds I wanted on 6s
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