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 :thumbup1:

[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 :thumbup1:

:iagree:

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

[Shaun78]

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

[Brushless55]

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 :popcorn2:

[dag-nabit]

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

[Brushless55]

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.. :beerchug:

[Diesel6401]

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/files/5708_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.

[Shaun78]

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)

[Shaun78]

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)

[Diesel6401]

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.....

[Diesel6401]

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...

[Brushless55]

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?

[Shaun78]

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

[Diesel6401]

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.


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!

[Shaun78]

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

[dag-nabit]

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

[Brushless55]

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 :huh:

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

[dag-nabit]

I can say Traxxas, but I try hard not to :smile:

I was referring to the Turnigy/Seaking ESC's in particular, and most ESC's in general.

One (hopefully) can assume the ESC in the Spartan is the exception, not the rule.

Kevin

[Diesel6401]

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

Fast, Cheap or Reliable.... Choose 2!



D just plays things on the more safe side..

BINGO!
:beerchug:



I rather spend the money up front on a esc that can handle the loads. My thinking is You run a t180 on 6s (been done before by many people some ok some not ok) so you have your $100 esc and your $100 motor. Esc goes poof on 6s possible taking the motor out with it. $200 up in smoke. Now you have to spend say another $200 just to get the same setup you had before, Your at $400. I buy a $300 esc & a $100 motor it's still $400 but my boat doesn't smell burned poop lol.... Just my thinking...

[Shaun78]

got a point. i havent heard of anyone here burning up a T180 yet but I am new to this

[Diesel6401]

got a point. i havent heard of anyone here burning up a T180 yet but I am new to this

It's happened. If you do a detailed search you may find some info of it happening, I heard about on a few occusions a while back on this site and others. They are AWESOME esc's they truly are, but like anything when you push it too it's absolute max things can happen and reliability goes down.

[Brushless55]

I rather spend the money up front on a esc that can handle the loads. My thinking is You run a t180 on 6s (been done before by many people some ok some not ok) so you have your $100 esc and your $100 motor. Esc goes poof on 6s possible taking the motor out with it. $200 up in smoke. Now you have to spend say another $200 just to get the same setup you had before, Your at $400. I buy a $300 esc & a $100 motor it's still $400 but my boat doesn't smell burned poop lol.... Just my thinking...

I'm starting to think about putting in better esc's with higher V rating, so as to have head room in the esc..
What about this esc?
240V 12s
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=12442

I'm thinking of this for my Thundertiger with a CC1717..
I will mostly run 5s and 6s, but I do want to run up on 8s from time to time just to make the gas guys :censored:
:lol:

[Diesel6401]

I'm starting to think about putting in better esc's with higher V rating, so as to have head room in the esc..
What about this esc?
240V 12s
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=12442

I'm thinking of this for my Thundertiger with a CC1717..
I will mostly run 5s and 6s, but I do want to run up on 8s from time to time just to make the gas guys :censored:
:lol:

That esc is this esc: http://www.offshoreelectrics.com/proddetail.php?prod=hef-sword-240hv

[Brushless55]

That esc is this esc: http://www.offshoreelectrics.com/proddetail.php?prod=hef-sword-240hv

Oh wow!
I'm helping a friend build a 41" Cat on 10s and we were going to buy that esc but Steven is out of stock :huh:
so that's a good one then?
maybe I'll get two, one for him and one for my Thundertiger

[Shaun78]

Now I think I want a 4082 1600kv. Why r these motor hard to find?

[dag-nabit]

Now I think I want a 4082 1600kv. Why r these motor hard to find?

Increased demand due to all the Spartans being upgraded??

Or just general increase in sales with the return of spring/summer.

Kevin

[JPriami]

because i bought stock on leopard hobby.. lol

wish so

[dag-nabit]

because i bought stock on leopard hobby.. lol

wish so

Speaking of Leopard Hobby, I notice they are getting their site back in order with more data pages now available again.

Also seem to have a lot fewer models available, or maybe just not updated on the site yet.

Kevin

[dag-nabit]

Just an FYI for those interested in the Leopard 4082 1500kv.

I ordered a Leopard 4082 1600kv and received the communication below from HiModel prior to them shipping.

What it comes down to is Leopard Hobby is re-badging the 4082 1500kv as a 1600kv motor.

So when the next batch leaves the factory in a few weeks they will be marked as a 1600kv motor, but actually nothing has been changed, still the same motor as the 4082 1500kv.

Kevin

Before shipping the order, we need your confirmation on the KV of the motor, the one we have in stock now is marked 1500KV, but it will be marked as 1600KV since next batch, please confirm will the one marked 1500KV will be ok with you? (As notified by the manufacturer that 1600KV will be marked since next batch, so we change our website specs to 1600KV, and only changed back to 1500KV today to avoid confusion like this)

Please confirm if we can go ahead to ship the one marked 1500KV, if not, then please advise what do you prefer to deal with the order, it may take several weeks till the one marked 1600KV to be available in stock (the motor actually not changed, only because the motor is more close to 1600KV than 1500KV, so they want to mark it as 1600KV instead)

Sorry for the inconvenience.
Apr,11,2011

[JPriami]

Thats loco essay
Hey man you want to buy my Mercedes? Dont mind that kia logo on there it looks just like that kia but its a Mercedes man.

[mavdriver]

Loco indeed LOL :laugh::olleyes:

[spartanonfire]

I think I need one of these 4082 1500/1600 motors. Any idea when they will be restocking?

[mavdriver]

I got mine from this guy http://204.186.93.64/BrushlessMotors-Leopard.htm

[dag-nabit]

Sounded like HiModel would be a few weeks getting them in.

Kershaw Designs shows them in stock. http://204.186.93.64/BrushlessMotors-Leopard.htm

Kevin

Ooops, post over, same site as mavdriver suggested.

[spartanonfire]

Ok. Im just going to put a 4082 and a turnigy 180 in a seperate power module mount. That way each time the traxxas stuff fries I just unbolt it toss it in a box and send it to traxxas. Then bolt the new setup in and keep having fun. I'm also going too keep track of time and expenses each time I do it. Probably going to organize a class action lawsuit against them if they don’t do something to resolve this issue. There's enough people on the web to get it organized, and I have the resources unlike a lot of the kids getting burned.

[Brushless55]

Ok. Im just going to put a 4082 and a turnigy 180 in a seperate power module mount. That way each time the traxxas stuff fries I just unbolt it toss it in a box and send it to traxxas. Then bolt the new setup in and keep having fun. I'm also going too keep track of time and expenses each time I do it. Probably going to organize a class action lawsuit against them if they don’t do something to resolve this issue. There's enough people on the web to get it organized, and I have the resources unlike a lot of the kids getting burned.

I would love to get my money back on mine that I've never run :glare:

[spartanonfire]

Hang tight. I'm sure you are not alone. For now they are going to keep replacing mine until they come out with a proper replacement for the poorly engineered crap it came with.

[Steven Vaccaro]

Leopards been restructuring, and getting new help and new reps. Its now worked out, so motors should be coming.

As far as the 1500 / 1600 debate goes. Thats another story. I was told something much different by my Leopard Rep. But time will tell on what is what.

[dag-nabit]

Leopards been restructuring, and getting new help and new reps. Its now worked out, so motors should be coming.

As far as the 1500 / 1600 debate goes. Thats another story. I was told something much different by my Leopard Rep. But time will tell on what is what.

Are you going to let us in on what you were told?

Kevin

[mavdriver]

Hang tight. I'm sure you are not alone. For now they are going to keep replacing mine until they come out with a proper replacement for the poorly engineered crap it came with.

Yeah well I call Traxxas today and the friendly rep told me they might charge me to replace the crap motor that over heated , i did all the cooling mods , bigger tubing lines drill out the rudder , first of all why in hell do I have to do that ? it should have work right out of the box as far i`m concern this boat was false advertisement fron the get go :mad: , the motor got Hot after a 4 mins run when it cool off it was turnning so it didn`t lock up is actually free wheeling I think it demagnatized :unsure: anyways I sent the motor back will see what happens if they decide to charge me to replace the motor , well they can keep it , might have join that lawsuit , after all , i also have replace all the components so I can have fun :cursing:

[spartanonfire]

I would raise holy hell with them if they told me that! Charge me because they built a POS?!?!?! Every supervisor at Traxxas would fear my calls before I would let them pull that BS on me. There would be a claim at the BBB filed so fast a Spartan motor and ESC wouldn't have time to go up in smoke. AGAIN

[Steven Vaccaro]

Are you going to let us in on what you were told?

Kevin

I can only say that they are making me some 1500's. When they come in, I will test a 1500 and 1600 when I get a chance to see, whats what.

[mavdriver]

I would raise holy hell with them if they told me that! Charge me because they built a POS?!?!?! Every supervisor at Traxxas would fear my calls before I would let them pull that BS on me. There would be a claim at the BBB filed so fast a Spartan motor and ESC wouldn't have time to go up in smoke. AGAIN

So will I mean time waiting on there response will shall see :glare: anyways give them a chance to respond as long as they are replaceing the bad e units i`m okay was that IMHO the HuLL is fine for what it is . :tongue_smilie:

[dag-nabit]

Ok. Im just going to put a 4082 and a turnigy 180 in a seperate power module mount. That way each time the traxxas stuff fries I just unbolt it toss it in a box and send it to traxxas. Then bolt the new setup in and keep having fun. I'm also going too keep track of time and expenses each time I do it. Probably going to organize a class action lawsuit against them if they don’t do something to resolve this issue. There's enough people on the web to get it organized, and I have the resources unlike a lot of the kids getting burned.

I see they finally got around to deleting your thread over on the Traxxas forum.

Just like you said, they can find the time to monitor, censor, and delete threads and posts they don't like, but can't find the time to communicate on line with customers.

Kevin

[Brushless55]

I see they finally got around to deleting your thread over on the Traxxas forum.

Just like you said, they can find the time to monitor, censor, and delete threads and posts they don't like, but can't find the time to communicate on line with customers.
Kevin

That's very interesting :spy:

[spartanonfire]

Yeah...well peter suddenly appeared and was like what thread...and was there traxxas bashing??? That's why I saved a copy of the thread. I responded to him in the other users thread and directly on his wall. We'll soon find out if they legitimately care about taking care of the customer or if they are trying to brush this all under the rug.

[Brushless55]

it's like they only respond when it is convenient to them...

[mavdriver]

Ok guys got the 4082/1500 installed prather 220 prop T 180 esc , cooling mods water displacement Y connector , and exit for both motor and esc , water feed through rudder if is still to warm I`ll do the dual rudder pick up mod , but mean time !!!!! wish me luck guys :Praying: it should go well will be checking every 2 mins. temps on motor and esc . and hopefully things will be nice and cool , if I get 120 on motor and 100 on esc I`ll be happy . :smile:

[dag-nabit]

Ok guys got the 4082/1500 installed prather 220 prop T 180 esc , cooling mods water displacement Y connector , and exit for both motor and esc , water feed through rudder if is still to warm I`ll do the dual rudder pick up mod , but mean time !!!!! wish me luck guys :Praying: it should go well will be checking every 2 mins. temps on motor and esc . and hopefully things will be nice and cool , if I get 120 on motor and 100 on esc I`ll be happy . :smile:

Let us know how it goes.

I think you are going to be fine on temps. More efficient motor and lots of torque to spin that 220.

Kevin

[Brushless55]

Ok guys got the 4082/1500 installed prather 220 prop T 180 esc , cooling mods water displacement Y connector , and exit for both motor and esc , water feed through rudder if is still to warm I`ll do the dual rudder pick up mod , but mean time !!!!! wish me luck guys :Praying: it should go well will be checking every 2 mins. temps on motor and esc . and hopefully things will be nice and cool , if I get 120 on motor and 100 on esc I`ll be happy . :smile:

the reason we need to do cooling mods on the stock system is because it sucks

this motor and esc will take what you throw at it and like it:thumbup1:

don't worry about getting the cooling just right, you possibly could use the stock rudder pickup and keep the single cooling line through this new setup without any heat issues at all...

[barryaclarke]

I have gotting some good information regarding the Traxxas Spartan using the Leopard 4082 along with a 180 esc and upgraded cooling. I am new to electrics and this is my first boat. Looking at the Lipo 6S batteries, I see many with ratings for constant discharge anywhere from 20C to 40C. I have read that if you can afford the higher number go for it, but never use a rating that is too small. What number should I be looking at using the 4082 and 6S?

[djmaincheese]

Get those Turnigy Nano-Tech 45C-90C Discharge 3S 5000mah pack from HK.......when they become availabe.

[dag-nabit]

I have gotting some good information regarding the Traxxas Spartan using the Leopard 4082 along with a 180 esc and upgraded cooling. I am new to electrics and this is my first boat. Looking at the Lipo 6S batteries, I see many with ratings for constant discharge anywhere from 20C to 40C. I have read that if you can afford the higher number go for it, but never use a rating that is too small. What number should I be looking at using the 4082 and 6S?

Depends on the size of the battery because the discharge rate is a multiple of the capacity.

A 5000mah (5amp) battery with a 30C discharge rate should safely discharge at up to 150 amps (5x30=150amps)

A 6500mah battery with a 30C rating should safely discharge at up to 195 amps. (6.5x30 = 195amps)

For the Spartan it is most often recommended to have a minimum of 30C discharge on a 5000mah pack.

But a higher C rating will give you some buffer.

The Turnigy nano tech 5000mah batteries with 45C discharge rating have been a popular choice.

Kevin

[barryaclarke]

Thank you. This is what I have been looking for. I saw Turnigy 5000mAh 6S 25C Long Lipo Packs for $56, but I thought that JUST maybe the 25C was a bit low. Thanks again. Barry

[Brushless55]

I have gotting some good information regarding the Traxxas Spartan using the Leopard 4082 along with a 180 esc and upgraded cooling. I am new to electrics and this is my first boat. Looking at the Lipo 6S batteries, I see many with ratings for constant discharge anywhere from 20C to 40C. I have read that if you can afford the higher number go for it, but never use a rating that is too small. What number should I be looking at using the 4082 and 6S?

you can use smaller C rated packs you just won't get full potential out of your rig
I would run 5000mah 30C minimum for good all around sport use
But...


Get those Turnigy Nano-Tech 45C-90C Discharge 3S 5000mah pack from HK.......when they become availabe.

if you want to kick some :censored: without taking out a small lone, get these! :laugh:

[Brushless55]

Thank you. This is what I have been looking for. I saw Turnigy 5000mAh 6S 25C Long Lipo Packs for $56, but I thought that JUST maybe the 25C was a bit low. Thanks again. Barry

I reread your post here, and if your saying 6s packs, you can get them for the great price and run them in parallel and have a wicked setup! :banana:
you would have 6s2p ( 10,000mah 25c ) and that is well plenty for any motor combo in the spartank :laugh:

[spartanonfire]

I'm running a pair of these 6000mah 6s 25-50c rated in parallel with a 4082 1600kv and they ROCK! http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11941

[Brushless55]

I'm running a pair of these 6000mah 6s 25-50c rated in parallel with a 4082 1600kv and they ROCK! http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11941

very nice man :thumbup1:

[Shaun78]

I just installed my 1500 kv leopard. Man 1 on the motor to esc wires barely makes it. Also the strut to drive dog gap is much less now too. Anyone else experience those 2 things

[Brushless55]

I just installed my 1500 kv leopard. Man 1 on the motor to esc wires barely makes it. Also the strut to drive dog gap is much less now too. Anyone else experience those 2 things

it is a bigger motor and not build the same as the stocker so things will be a tad diff :thumbup1:

[Shaun78]

1st run with new motor. 56.8 with 445 prop. Gonna try 545, 645 and 642

[bbosncali]

1st run with new motor. 56.8 with 445 prop. Gonna try 545, 645 and 642

Buy a real boat buddy... your gonna have so much power and such a big prop that your gonna hit the throttle in your spartan and the boats gonna go one way and the motor the other way lol

[Brushless55]

even djmaincheese has his up for sale now...

[bbosncali]

1st run with new motor. 56.8 with 445 prop. Gonna try 545, 645 and 642

I wanna see a video I don't believe it..... lol:sarcasm1:

[Brushless55]

I wanna see a video I don't believe it.....

damn, if its not the stock motor and with that much kv on that size of a prop, it's doing it!
hell it should get a little more with a longer run! :Peace_Sign:

[Shaun78]

Hey Bos, BOW TO THE KING!!!! u like the signature don't you?

[bbosncali]

Yeah it moves pretty good just like to talk smack.... lol him and I go back and forth all the time

[Brushless55]

Hey Bos, BOW TO THE KING!!!! u like the signature don't you?

Your sig is making me want to keep my Gen and stick it to your slow 63.7mph :laugh:

[bbosncali]

Your sig is making me want to keep my Gen and stick it to your slow 63.7mph :laugh:

Lol right thts my best with that motor in my mg but my best is 63.4 with a tacon 4074 2000kv but my genesis will be built this week an I'm putting another 1518 in so can't wait to see what she does.. what was your best in your genesis brushless?? Don't you have like a 1717 in or something crazy like that?

[Brushless55]

thoughts of a CC1520 on 8s :spy:

[Shaun78]

Can the 1520 handle 8s?

[bbosncali]

What were you getting for speed on 6s??

[Shaun78]

Brushless, what's. Your genesis got and what's your speeds? Your sig says 1520 on 6s. What speeds?

[Brushless55]

Can the 1520 handle 8s?

YES! :rockon2:


Brushless, what's. Your genesis got and what's your speeds? Your sig says 1520 on 6s. What speeds?

I've never thrown it into the waters :biggrin:

[bbosncali]

Gotcha.. I just got my hull yesterday and my hardware will be here tomorrow so maybe ill see what she does with my oher 1518 this weekend

[Shaun78]

well then you need to to back that comment up brother........
Max Input Volts: 25.2 volts that is per Castle for the 1520 so 8s is not recommended in my opinion.

http://www.castlecreations.com/products/neu-castle_motors.html

[Shaun78]

my 1500 kv Leopard can run 9S...HMMMMMM!!!! that would be 70's maybe 80's mph

[Brushless55]

well then you need to to back that comment up brother........
Max Input Volts: 25.2 volts that is per Castle for the 1520 so It cant run on 8s
http://www.castlecreations.com/products/neu-castle_motors.html

you shouldn't talk with your foot in your mouth! :doh:
It will run on 8s
http://i703.photobucket.com/albums/ww39/filmmaker2009/001-12.jpg
http://i703.photobucket.com/albums/ww39/filmmaker2009/002-13.jpg

[bbosncali]

well then you need to to back that comment up brother........
Max Input Volts: 25.2 volts that is per Castle for the 1520 so It cant run on 8s

http://www.castlecreations.com/products/neu-castle_motors.html

Not entirely true.... yes that's what its rated at but you might be able to get a good saw run before it goes. Just because its rated at 6s doesn't mean people don't push them beyond what they should... the results are usually very bad in the end though lol

[Shaun78]

alright you do what you want Brushless, you r taking this to heart so this conversation is over. Me and Bosncali are close friends and were messing around. I was just stating the specs from castle so you can do what you want, its your motor.
8s is 33.6 volts.

[Brushless55]

alright you do what you want Brushless, you r taking this to heart so this conversation is over. Me and Bosncali are close friends and were messing around. I was just stating the specs from castle so you can do what you want, its your motor.
8s is 33.6 volts.

Talking it to heart? :confused2:
I'm not the one telling others they cannot do something
take a look around and see what others are acually doing before telling someone what they cannot do
Castle motors are built better than the leopard and can take the same and more
better to look at the NEU site for specs as the Castle motors are very close the same but built much cheaper in price
a NEU 1521 1Y can take 38Volts (CC1520 1Y)
http://www.neumotors.com/Site/1500_series.html
the bearings on the CC1520 can run to 60,000rpms
and 8s is 29.6V = 47360 unloaded rpms :rockon2:

[bbosncali]

Depends on how you do the math.... a fully charged lipo cell is 4.2vlts which I'm sure you know so technically 8s would be 36.6 and equal 53760 rpms unloaded which is still under the 60000 rpms but honestly I wouldn't recomend it even though I love high rpms but a lot of those rpms get wasted. Example my tacon 4074 2000kv was my fastes speed in my mg at 63.4mph but my 1518 hit 62.1mph both on 6s and my flex shaft was slipping cause 2 runs later it ended up on the bottom of the lake and I know a lot of those rpms were wasted as well but my run times were a lot longer with my 1518 which is why I decided to stay with that motor. People tell me I'm crazy to run either motor on 6s but I still do it. Its your boat your gonna do what you want know matter what people say. Its ll about tral and error that's how I look at it but the faster you spin those the more amps they draw and the better chance you have to fry something imo

[Brushless55]

Depends on how you do the math.... a fully charged lipo cell is 4.2vlts which I'm sure you know so technically 8s would be 36.6 and equal 53760 rpms unloaded which is still under the 60000 rpms but honestly I wouldn't recomend it even though I love high rpms but a lot of those rpms get wasted. Example my tacon 4074 2000kv was my fastes speed in my mg at 63.4mph but my 1518 hit 62.1mph both on 6s and my flex shaft was slipping cause 2 runs later it ended up on the bottom of the lake and I know a lot of those rpms were wasted as well but my run times were a lot longer with my 1518 which is why I decided to stay with that motor. People tell me I'm crazy to run either motor on 6s but I still do it. Its your boat your gonna do what you want know matter what people say. Its ll about tral and error that's how I look at it but the faster you spin those the more amps they draw and the better chance you have to fry something imo

Bro, take a look around and see others have run these motors on 8s
3.7 per cell is how most every FE builder builds with
and that would put me at about 47,000rpms and under a load I will be about 36-37,000rpms at best
your Castle 1518 is a better motor than the Leopard, and why your speeds are so good with it, also the kv of that motor is better than the other and should pull less amps with the same prop
upping the volts and going with a smaller prop can actually pull less amps than a bigger prop with less volts :Peace_Sign:

[bbosncali]

But what I don't understand is why you would want t prop dwn with more rpms? To me it doesn't make sense. If your spinning all those rpms wouldn't you want to apply them? I guess thas where I get confused. I hear aot of people talking about prop slip and drawing to many amps which I guess is why you would want to prop down to avoid high amp draw but to me it also seems like there not getting applied with a smaller prop? And yes I agree the 1518 is a better motor and I only got to use 1 set of batteries so haven't really got to play with it to much with that motor but very happy with it so far. you like me seem to like the high rpms but a lot of people on here always say that is not good even ose recommends 27000-33000 rpms again not sure why? I haven't been in fe rc for all that long to understand everything. I read a lot and try to get the most frm what other people have done but I'm still gonna go my own way in the end and hope for the best and so far I think I've accomplished a lot for the short time I've been doing it. I'm not saying anything I wrote is right or wrong a lot of it is just me repeating things I've read or have tried for myself. I do also agree with you on the neu specs which I wish castle would just make there own chart but they have to be pretty close to the same since they are a sister company to eachother

[Brushless55]

Brandon, going up in rpms with a smaller prop can get the same power as with lower volts but wtih a bigger prop on 4s
like lets say just for example 1600kv x 6s with XXX smaller size prop gets 50amps cont.
and same motor 1600kv x 4s with XXX but bigger prop gets 75amps cont.
so the 6s setup with the smaller prop gets you more rpms with less amp draw

but there is a fine line for hull size x kv x prop size
to much rpms on to big a prop and smoke! :laugh:

but if I did run my Gen on 8s it would only be for a few short runs just to make the gas guys pee their pants! :roflol:

[bbosncali]

Lol... I think I get it.. that's what I was saying in a couple earier posts that you would just do a saw run or 2. Personaly I was always a gas guy in all my other rc stuff but with technoligy the way it is today I get faster vehicles with less headaces with electric over gas. Yeah I don't get the excitement of the little gas engine reving up whith all those rpms and all the noise but I'm not constantly tinkering with my carb to get a few more rpms or tuning it just right plus you can't even run gas boats on a lot of lakes in my area anyways so with that said electric all the way. That would still be cool to see that 1520 on 8s a little crazy but still fun to watch but honestly 60mph is more than fast enough for me but I still need to hit atleast 63.8mph just so I can have bragging rights over shaun lol. I hit 63.4 and he beat me out by .3mph lol.. then last week I hit 62.1 with my 1518 and he got me by .2mph so we are always going back and forth but he's in for a rude awakening when I'm done building my genesis with that 1518... I'm going for our record so I can talk smack to him hehe.

[Brushless55]

what prop are you running?
I do like gas boats and cars by the way... only on Colman fuel though :thumbup1:
I would love a 5th scale gas 4 wheel drive street car :rockon2:

[bbosncali]

With my 1518 I'm running a m545 with my 4074 I was running a x642. Id love to own one of those hpi baja trucks that thing is huge!! It looks so much bigger than the 1/5 buggy. I've had every gas powered monster truck or truggy at one point but still my favorite had to have been my revo with a sirio .27 that thing was a beast. My biggest fear with a gas boat was hving it stall in the middle of a lake with no way to get it but I've found out electric doesn't make it any easier if something goes wrong lol

[barryaclarke]

This maybe a stupid question. If you have a Leopard 4082 Y2 (Kv1,500) and you'r running it with 6s lipo, this will produce an mathematical rpm of 4.23 x 6 = 25.38 volts x 1,500 = 38,0700 rpm’s with a fully charged lipo pack. If you run it down to the minimum of 3 volts, this would 3 x 6 = 18 volts x 1,500 = 27,000 rpm. Knowing these figures, how do you figure what prop to use? Would you want the best rpm for the motor without over heateing it, best speed, longest run time, or a combination? I cannot image this is by trial and error and I find no data when I Google the question.

[Steven Vaccaro]

I use 3.7 volts and an efficiency of 85% to estimate where to start. Unless you find someone who has run the same setup, it is trial and error. In your case there are many guys that have run these setups. Now you just need to search the threads or maybe one will answer.

[dag-nabit]

This maybe a stupid question. If you have a Leopard 4082 Y2 (Kv1,500) and you'r running it with 6s lipo, this will produce an mathematical rpm of 4.23 x 6 = 25.38 volts x 1,500 = 38,0700 rpm’s with a fully charged lipo pack. If you run it down to the minimum of 3 volts, this would 3 x 6 = 18 volts x 1,500 = 27,000 rpm. Knowing these figures, how do you figure what prop to use? Would you want the best rpm for the motor without over heateing it, best speed, longest run time, or a combination? I cannot image this is by trial and error and I find no data when I Google the question.

I agree with Steven, just use the nominal voltage of 3.7v per cell in your calculations.

Or better, use the handy calculators here on OSE.

You can turn a pretty big prop with the 4082 1500, but torque roll and prop walk can start to factor in if you go too big.

The Prather 220 and 225 have been used successfully with this motor, or similar Octura props like the X642 or X645.

Some props, like Octura M series are designed to reduce lift which can help reduce prop walk.

Kevin