All you FE experts have any thoughts on leopard 4074 2000kv on 6s?

[jimbo--jones]

Picked up two 2000kv leopard 4074s for a bargain.

I got two turnigy long 6 cell 5000mah 25 to 35c batteries. These are 2.5cm high by about 30cm long, and they fit in nicely side by side in my apparition hull, allowing easy COG adjustment.

I know 6s on 2000kv is too much rpm, but these are the batteries that I'm gonna put in.

I'm using 2 Turnigy 180 marine escs and octura x442 and x442r

MY QUESTIONS IF YOUS WITH EXPERIENCE CAN PLEASE HELP ME OUT:

What will go wrong?
Will there be too much heat?
Can I just not give the system full throttle to keep the rpm down? ( I know the escs dont like running at half


Im thinking if heat is going to be the only issue I'll have that covered.
Installed 2 dual flush mount water inlets (4 intakes and 4 outlets)
If thats not enough I have a self syphoning fuel pump thats going in to keep cooling when boat is stationary.

I have lost a feigao 10xl and T180 on 6s before because of heat, so im making sure I dont lose another set up.

Any feedback appreciated, Thanks for your time

[RIPFENCE]

The pumps will not help your speed controller from blowing up...you already know whats going to happen so why do it? Its going to be insanely fast but its going to smell after too

[Alexgar]

i run a t180 and a cc1515 2200kv, i have maybe 10 runs and no problems yet

[jimbo--jones]

i run a t180 and a cc1515 2200kv, i have maybe 10 runs and no problems yet

is that on 6s?

[jimbo--jones]

The pumps will not help your speed controller from blowing up...you already know whats going to happen so why do it? Its going to be insanely fast but its going to smell after too

Whats the reason for the esc blowing other than over heating/ driving into a short from motor windings melting? Both escs will also be getting cap banks infront of them.

[RIPFENCE]

if this boat is going to be used for one pass up and back then it may hold up..but for any sort of length of time running the esc's will more then likely blow from too many amps/heat buildup..i do not believe you will be able to keep them cool and your amp draw is going to be over the esc's limit...its sounds like a fun expiriment though

[RIPFENCE]

i am by no means an expert but even with these motors on 4s lipo the boat would be a rocket and much much safer on your electronics..and you could actually run it until the lvc kicks in too which is better than the popping sound and then magic smoke lol

[britscoot]

My buddy runs a Leopard 2350kv,swordfish 240 hv on 5s2p and it comes in cool.
I dont understand why because it gets thrashed for 3 mins and hit 69.3mph on the gps.

[Alexgar]

cc 1515 on 6s

[RIPFENCE]

My buddy runs a Leopard 2350kv,swordfish 240 hv on 5s2p and it comes in cool.
I dont understand why because it gets thrashed for 3 mins and hit 69.3mph on the gps.

240hv would be part of the difference and prop choice is key too

[britscoot]

m455 was the prop.
It is freaky when this thing comes in cool.
Its a 32" cat and nothing special.
did i mention it comes in very cool....lol

[Diesel6401]

I say a cc1515 1y on 6s is too much RPM and your leopard on 6s are going to be way to much also. I woulnd't run either setup, possibly blowing a setup chasing speed isn't worth the $$$ to me. If your wrong your gonna blow a possible 2 motors and 2 esc's. Could be a $400+ learing experience, or you could get spend under $100 and get a new batteries. JMHO

[HOTWATER]

Sounds like an expensive disaster waiting to happen...........

[egneg]

Cap banks won't help if the motor is being pushed to hard. I have smoked ESC's and the cap bank was just fine.

[jimbo--jones]

I know 4/5 cell would be the safer option.

I only wanted 2 batteries though, and not 4 batteries to get the capacity and to get them to fit in.

I got the 6 cells because their capacity is ok, its a single battery, and they are low profile.

[HOTWATER]

Chuck!!!!!!! How are you bro?!!

[Diesel6401]

I know 4/5 cell would be the safer option.

I only wanted 2 batteries though, and not 4 batteries to get the capacity and to get them to fit in.

I got the 6 cells because their capacity is ok, its a single battery, and they are low profile.

:confused1:


2 of these http://hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=9260 much better then 6s

[jimbo--jones]

So what about if I just dont give it full throttle?

[egneg]

Chuck!!!!!!! How are you bro?!!

Just fine Kent, and you?

[Diesel6401]

So what about if I just dont give it full throttle?

ESC's = :flashfire:

[HOTWATER]

:hornets_nest:..............:flashfire::flame42:.. ......... $$$.....:blink::blink:

[jimbo--jones]

:confused1:


Haha mabey this is a bit clearer.
I wanted two single 5000mah lipos that would fit, hence the low profile 6s,

A single 5000mah 4s/5s would not fit and i did not want to use 4 2500mah lipos.

[Diesel6401]

Haha mabey this is a bit clearer.
I wanted two single 5000mah lipos that would fit, hence the low profile 6s,

A single 5000mah 4s/5s would not fit and i did not want to use 4 2500mah lipos.

I see.

Did you see the link I posted? They are a little smaller

[Make-a-Wake]

Its clearly not a good setup as told several times above.

4s is plenty for that motor. Instead of toasting 400 worth of equipment, why not just buy some batts as Diesel has suggested.

Here's the deal of the century......... 5000mah 40c 2s, get 4 and run two sets of series. 25 bucks each..........thats absurdly low for decent batts

http://www.hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=9961

[JMSCARD]

:tongue_smilie:
m455 was the prop.
It is freaky when this thing comes in cool.
Its a 32" cat and nothing special.
did i mention it comes in very cool....lol

you must mean x445... not a x455...

.... I think 5s would be the edge while 6s and the 1515 1y's are being done by some of you its not a recommended setup and sooner or later something is gonna let go.... we are talking about 55,440 unloaded rpm with the 2200kv 1y... with the 2,000kv leopard on 6s ( I know we all know our math but its nice to see it) we are still talking.. 50,400 rpm! I myself wouldn't wanna run that motor more then 5s max and it will be plenty fast on 4s as ripfence stated..... buy some more batts for you boat... you can get some turnigys/zippy 2s or 4s packs cheaper then replacing esc's and motors...

On top of that, even though I have never owned a appiration... I have owned plenty of zippy/turnigy packs... and I know their 6s 5000mah packs are HEAVY... and probably are gonna weigh down that hull big time.... probably more then the hull like.... it will still work I am sure, but not "ideal"..... JMHO.... good luck tho, like rip says if you go the 6s 2000kv setup its likely to be real fun for a bit....:beerchug:

[jimbo--jones]

Arent the esc under rated on purpose to handle half throttle?

Looks like ill be sticking these in my helicopter then.

Where can I find low profile 5s lipos?
Or am i gonna need to have 4 batteries? 2s and 3s in series?

[Make-a-Wake]

Here are two 5000 4s 40c packs at the USA warehouse for 49 each

http://www.hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=14985

[Make-a-Wake]

5s 5000 packs - http://www.hobbycity.com/hobbyking/store/uh_viewItem.asp?idProduct=8589

[jimbo--jones]

Hey thanks for the link diesel and make a wake. looks like ill be heading that way. Dont want more burnt equipt.

[JMSCARD]

check dimensions though and make sure they will fit... flightmax packs are thick!

[jimbo--jones]

Will 4 of these work? It says 2s2p. If I put two in series I get 4 cells yes?

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14697

[jimbo--jones]

Will 4 of these work? It says 2s2p. If I put two in series I get 4 cells yes?

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14697

[Make-a-Wake]

Yep, and those are some stout batts..........200a constant discharge!

[jimbo--jones]

so it wont matter if is 2s1p or 2s2p? Im grabbing 4 of them then. Cheers guys

[Make-a-Wake]

Check the measurements before you order.

[Rumdog]

Why do you need 10,000 mah?
Why not just sell the motor and go for a lower kv.
You will destoy that motor, when that goes, so can the esc, so can the rx, so can the servo, so can the lipos, not to mention what the hull will look and smell like.
At that much rpm, when the boat/prop hops out of the water and unloads, then re-enters you're going to se MASSIVE amp spikes.
The motor won't run efficiently in that configuration either. It will heat up, and lose power. That is if it doesn't de-mag first.
What boat is this?

[Make-a-Wake]

He'll have 5000 mah to each esc/motor........................:smile:

[Rumdog]

oops. missed that part

[jimbo--jones]

it was running 2 motors, so only 5000mah each. Thats what happened on my last boat rumdog, so thought id check 1st this time.

[jimbo--jones]

although if i get these 2 cell ones it would be 10000mah each motor ay? Means mega long run times yeh?

[jimbo--jones]

or is that ony when you put them in parallell?

[Make-a-Wake]

Parallel will give you 2s power and 10,000 mah...............series like you're wanting will give you 4s power and 5000 mah.