Issues with boat continually cutting out???

[Chirper]

Hi guys,

I have an Osprey mono with following specs:

Turnigy 56 series motor (1320kv I think)

Swordfish 240A ESC

Zop Power 6S 4000mah 60C (2 in parallel)

452 prop

I took the boat for its first run the other day, and I keep having an issue with the boat briefly cutting out every second-it sounds as though it's changing gears. Very occasionally it may get on plane and allow full power for approx 4 seconds before cutting out again.

Bringing the boat back in to check temps I recorded the following (all temps in degrees Celsius):

ESC: 75

ESC Capacitors: 105

Motor: 40

If you look at the rooster tail you'll see it constantly cutting out. Toward the end it gets a solid run of about 4 seconds.

What is going on here? I was reading on a similar thread how the LVC kicks in on the Hobbywing 180, could the same thing be happening on my Swordfish 240? Do I need extra capacitors to ensure a constant flow of current to the motor? Would some type of temperature cutout be kicking in, the capacitors @105C seem extremely hot. Is the prop too big, though a large 56 motor surely should be able to handle it.

Some SF Esc doesn’t like running with some high wind motors, checkout Ironclad rc on YouTube, he had to return a SF because of the same issues that you’re having.

[mmars89]

Thanks for the tip! I have a 2000kv 4074 in a rigger that I will try one with.

[Chirper]

i think that motor is too hot for your setup, if you decide to, you’ll have to prop down to a x440 prop on 6s or a 448 on 4s.

[mmars89]

i think that motor is too hot for your setup, if you decide to, you’ll have to prop down to a x440 prop on 6s or a 448 on 4s.

I'm guessing you're referring to running the 2000kv motor I mentioned, in my twin cat on 12s? What's wrong with 90,000+ rpm??? ha. I planned to move the swordfish ESC's one at a time into my rigger, which is running a 2000kv leopard 4074 on 6s. This is for troubleshooting to see if the problem follows the ECS's or is something in the twin cat set-up.

Thanks

[fweasel]

I'm guessing you're referring to running the 2000kv motor I mentioned, in my twin cat on 12s? What's wrong with 90,000+ rpm??? ha. I planned to move the swordfish ESC's one at a time into my rigger, which is running a 2000kv leopard 4074 on 6s. This is for troubleshooting to see if the problem follows the ECS's or is something in the twin cat set-up.

Thanks

[mmars89]

2000kv on 6s? Would have to prop down to a x430 or so, otherwise you?re gonna have a Poof.

Thanks for your opinion. Just looking for help with the cut-out problem, not if my set ups are acceptable to everyone's different standards. I understand the limits of electronics and I am fully aware that I'm pushing towards the upper end. I know things WILL break/fail at some point, I'm okay with that. I like fast things ha.

Could this cut out problem have something to do with running high RPM, absolutely it could. However, I have had zero issues with excess heat and/or burning electronics. The twin cat (1000kv 4082's on 12s) runs surprisingly cool, was expecting much more heat. Ran up to 90mph with 646 props and 100mph with 1814(3) Dasboata props, electronics were nowhere near dangerous temperature levels after 3-4 pulls.

Same goes for the rigger, running a 4074 2000kv on 6S with 442 de-tongued prop, and I don't run it conservatively, thing is a pure basher. Ran two 4000mAh packs in a row through it on the weekend, running hard, and the motor/ESC were around 100-110F, LiPo packs were getting a bit warm, around 120. Quite happy with that considering how "hot" of a set up it is, proven to be quite reliable actually. Wasn't sure if the Raider 150 that's currently in it was up to the task, sure impressed with that controller. (Mind you water temp was around 50F, I expect running temperatures to go up a fair bit as water temps increase throughout the summer)

Thanks again for your concern and opinion. Still trying to narrow down what it is specifically that is causing the cut-out problem in the Swordfish 240's.

Cheers

[ILoveBotesNMotes]

I'll run 90k rpm. I ain't scared.

Sent from my SM-G991W using Tapatalk

[mmars89]

Hey just realized that your temperature are in centigrade, wow! 167. Degrees Fahrenheit on Esc and over 220f+ quite hot for those capacitors. It seems like you’re pulling too many amps check your drive line, see if you’re binding. On your setup you should be around 47c on the Esc and pulling about 124 Amps otherwise the SF Esc is the problem

Are you just messing with me now??? Better read my post again, clearly wrote F for "Fahrenheit" behind my temperature numbers. I would sure hope the lake wasn't 50C, poor fish...
(By the way, if those number were in Celsius that would be 212-230F on the ESC/Motor and 248F on the LiPo. Not sure what kind of conversion you did to get 167F.. that would be 75C)


I didn't post about the rigger originally, that came up because I planned to use it to test the Swordfish ESC's. It has a Raider 150 in it right now and there are no issues with it whatsoever, it runs great and reliably, and doesn't even light on fire... My post was about my twin cat Swordfish 240 ESC's cutting out. And if you read my posts, you will see that it too is running the same RPM as the rigger, only it's running 1000kv on 12S (estimated 39,960rpm at 90% efficiency). I have closely monitored amp draw and temperatures on it and have never seen any dangerous numbers. The most it ever pulled was 156A (according to the data logging) with the 1814(3) Dasboata props. Three wide open pulls with those props brought the motors and ESC's to roughly 140F (F = Fahrenheit).

You seem to be quite the expert on my set ups though, any thoughts on what is causing the Swordfish 240 cut out problems? Or should we keep talking about the fact that I'm running a 2000kv motor on 6s with a x442DT and it isn't bursting into flames?

Any help on the Swordfish 240 cut out problem would be appreciated.

Thanks

[mmars89]

Data Logs. Twin Cat DF Explorer; Leopard 4082 1000kv 3Y motors, Swordfish 240 ESC's, 12S (2x 6S 6000mAh Zeee blue packs in series, common to both ESC's), Dasboata 1814(3) props. 2 pulls at full throttle.

The cut out problem wasn't too bad this day, little bit to get it up on step and get it going but then she opened up. I've been trying to capture a data log when it's consistently cutting out, I will keep trying. The following logs have good info to see how this build runs though.

Starboard Drive


Port Drive



The captures came out a little blurry and the numbers on the Y axis are impossible to read in the first place. The important numbers are up in the banner. For reference, starting voltage on these trends state 50.2V

ESC Settings
LVC: 4 cells
Cutoff Voltage/Cell: 2.5V
Brake Types: No Brake
Timing Advance: Middle (5*-20*)
Cutoff Type: Soft Cutoff
Startup Type: Standard
PWM Rate: 8KHz

LVC is at the lowest possible settings, it won't let you shut it off completely. According to the manual this should equate to 10V before LVC kicks in. I've also tried setting it properly, at 12S 3.0V (it has pulled as low as 3.5V per cell on SAW runs).


Better picture for reference.



Sustained Cut-out problem video. This is as bad as it gets. If I continue to hold full throttle it will sustain like this. If I let off and get back into it, it resolves (sometimes takes a few tries).

https://www.youtube.com/watch?v=dRgmXNl4rtw

In these videos you can hear it cutting at first, then I let off and re-pull quickly and she goes.

https://www.youtube.com/watch?v=GAkRAdzY_sI

https://www.youtube.com/watch?v=WYr2jXDDF-8

**Running CNC 46mm 1.6P DT 2-blade props in these three videos. They pull less current than the 1814(3) props, around 120-130A if I remember correctly.

Thanks

[mappo]

Are you just messing with me now??? Better read my post again, clearly wrote F for "Fahrenheit" behind my temperature numbers. I would sure hope the lake wasn't 50C, poor fish...
(By the way, if those number were in Celsius that would be 212-230F on the ESC/Motor and 248F on the LiPo. Not sure what kind of conversion you did to get 167F.. that would be 75C)



I didn't post about the rigger originally, that came up because I planned to use it to test the Swordfish ESC's. It has a Raider 150 in it right now and there are no issues with it whatsoever, it runs great and reliably, and doesn't even light on fire... My post was about my twin cat Swordfish 240 ESC's cutting out. And if you read my posts, you will see that it too is running the same RPM as the rigger, only it's running 1000kv on 12S (estimated 39,960rpm at 90% efficiency). I have closely monitored amp draw and temperatures on it and have never seen any dangerous numbers. The most it ever pulled was 156A (according to the data logging) with the 1814(3) Dasboata props. Three wide open pulls with those props brought the motors and ESC's to roughly 140F (F = Fahrenheit).

You seem to be quite the expert on my set ups though, any thoughts on what is causing the Swordfish 240 cut out problems? Or should we keep talking about the fact that I'm running a 2000kv motor on 6s with a x442DT and it isn't bursting into flames?

Any help on the Swordfish 240 cut out problem would be appreciated.

Thanks

That was in response to Hugh b from Queensland with his temps in centigrade. sorry about that!

[mappo]

Hello FE friends,

Going to see if I can revive this thread. I am having the same issue with my twin cat running 240 Swordfish ESC's.

Set up:
Delta force explorer, carbon inlay
Swordfish Pro plus 240 HV ESC's
1000kv 4082 Leopard Motors
Fly Sky GR3E receiver and GT3B Trans
Tenergy 6v 2000mAh NiMH receiver battery
Power HD D-15HV servo
Running 12s with 2x 6s Zeee 6000 mAh packs in series, common to both ESC's

https://www.youtube.com/watch?v=dRgmXNl4rtw

According to the data logs I'm only pulling a maximum of 156A with the voltage dipping to 42.5v at the lowest point, this got me to 100mph. Trends show throttle signal is coming through, leading me to believe it's not a receiver problem but an ESC problem.


What I have tried;
LVC is set to lowest possible setting, 4s 2.5v. Did not solve problem
Separate power sources, 6s per ESC, on their own battery. Did not solve the problem
Props from 442's to 50mm plus, 2 and 3 blade. All the same results
Made wooden block to get receiver away from carbon. Did not solve the problem
Switched receivers (in kind). No change
Changed Y cable, no change
Pulled positive wire in Y cable, no change

[ATTACH=CONFIG]175015[/ATTACH]

Any help would be appreciated.

Thanks

Just realized that it’s a revised thread, I was responding to HUGh B” from Aus.

[mmars89]

Just realized that it’s a revised thread, I was responding to HUGh B” from Aus.

Ha ha that makes sense, I was confused. Sorry I missed that. I probably should have started a new thread to avoid confusion. My bad!

Thanks!
Cheers