2nd castle 120 hydra burnt

[andym]

Fighter is on the money, m545 and 645 are a good option too depending how your boat runs. M447 with some mods work well on that motor esc set up to. Currently trialing a x646/3 detounged, back cut 1/8 and down to 44.5mm, this is very fast and temps are acceptable. Not so good unmodified though

[greenblast]

mustang boy this is great advise! i dont know if i feel this way because now i understand what these guys are saying. or they never told me lol! you have to know what you are pulling for amps. you need to check run times with amp draw to know this . i made the mistake of bashing castle after being flawless for so long.and the blowing for (no apparent reason) instead i should have been praising them for the 120 surviving so long with my hot setup!the more knowledge the less expensive this hobby is.good luck with your addiction lol.

[JMSCARD]

[QUOTE=andym;222757]The 240LV is the best 4 s option IMO, PLEASE by the data link cable and set your LV cut off correctly, 3.2 volts is a good place to be with this.
[QUOTE]as temps would be 135-140.... any more passes and I would be forking over $200 for another NEU.....

Give the NEU motors some credit, I have a two year old 1515 1Y that regularly sees 150-160 deg F and a few times 180 and it still runs as strong and fast as the day I purchased it.

Andy I have a 1515 1.5y that saw 180 degrees too... It now sits on my workbench with no "cogging" whatsoever.... Had three total runs..... I need to send it back to get it fixed.... They are fantastic motors no doubt, I have plenty of neu's and like them very much, but they are designed to be operated under certain conditions.... I just assume keeping my neu's healthy and in their desired temp range...

[andym]

Try one of these, should get that baby off the shelf and into a boat http://forums.offshoreelectrics.com/...ad.php?t=16745
I know of one saw person who see's 160 deg minimum on a 1527 every run, same motor for over 50 runs and he just gets faster

[Fluid]

You don't need a HV240 for a 4s setup....

I think that the evidence proves otherwise in this case. Few boaters realize how many amps they are really drawing with their setups - they think that just because it does not burn up it is okay.....

For those who have never data logged a BL motor, the UL-1 motor on 4S with an m545 prop can average 85-95 amps easily, with many many peaks over 100 amps - in a light, well setup LSH hull. A hotter motor like the Castle the OP used will pull far more amperage. It is no wonder that so many ESCs burn up when they are run outside their design envelope.

A higher capacity ESC will definitely help, but the OP needs to reduce his run time. Seven minutes is too long for most hot BL setups, particularly if a lot of part throttle is used. The latter is the cause of a lot of overheated, burned out ESCs.


.

[andym]

Well please by all means tell us all why the HV is a better 4s ESC than the 240LV ????? Cant can you !!

[properchopper]

I think that the evidence proves otherwise in this case. Few boaters realize how many amps they are really drawing with their setups - they think that just because it does not burn up it is okay.....

For those who have never data logged a BL motor, the UL-1 motor on 4S with an m545 prop can average 85-95 amps easily, with many many peaks over 100 amps - in a light, well setup LSH hull. A hotter motor like the Castle the OP used will pull far more amperage. It is no wonder that so many ESCs burn up when they are run outside their design envelope.

A higher capacity ESC will definitely help, but the OP needs to reduce his run time. Seven minutes is too long for most hot BL setups, particularly if a lot of part throttle is used. The latter is the cause of a lot of overheated, burned out ESCs.


.

Here's some data to back up what Jay's talking about : three runs on a 4S Spec LSH setup with a UL-1 motor turning an M445. The purple line is amps - the left Y-Axis is the values. Frankly I'm surprised [ and impressed] that the UL-1 SC (with some extra caps) did so well, although the runs were quite short. If the UL-1 motor pulled this many amps in a very loose running setup, a 2200 Mamba has to pull lots more, very likely way outside the realm of what a CC 120 can comfortably handle, especially with long(er) runs.

[JMSCARD]

Try one of these, should get that baby off the shelf and into a boat http://forums.offshoreelectrics.com/...ad.php?t=16745
I know of one saw person who see's 160 deg minimum on a 1527 every run, same motor for over 50 runs and he just gets faster

I don't think telling people to operate their motors at 160 degrees for increased performance is a appropriate message to be sending to folks, especially ones without alot of experience that aren't racing.... I think I assume keeping mine at the 120-130 range.... been at the higher temps... always ends up costing me money and Again I am not Bashing NEU Motors.... I have switched 90% of my boats to them.... love em actually, but I also want them to be in my boats years to come thats why I spent the extra for them, and my Neu's dont seem to need to run high temps to perform exceptionally.... and also andy... this gentleman has the Castle Version... which the quality might not be at exactly the same level...

[scoota]

this is a data log of the CC/NEU 1515 / 2200kv with a M445

[andym]

I was not recommending to do so, only that they are capable. Any one who wants longer than 1-1 1/2 min run time would not even think about these high temps

[scoota]

here are the temps first graph is the ESC , 2nd is the motor end bell temp

[FighterCat57]

Another recommendation in order to stay with the 120a esc is to go with a lower Kv motor. More volts = less amps. Get a Neu 1515 1.5Y @ 1500kv. Not sure if the replacement rotor will work to change the Kv but that might be a good option at low cost if the rotors can be interchanged.

4s x 120a = 1728 watts @2200kv = 32560 RPM

6s x 120a = 2664 watts @1500kv = 33300 RPM

According to Castle, the 1515 series motors are mostly 2500 watt (peak) motors, so using 6s and 1500kv appears to be the most efficient configuration.


PS- I'm running that exact cat right now on 6s using a generic 125a Suppo ESC and a generic KD 3674 1100Kv motor & an m445 prop, running 44ish mph.