How hot is to hot fore a Scorpion 4025-1100 / Kontronik Jive HV80 kombo.

[Mr.Andersen]

After starting to flye my Logo 500 i feal bought ESC and motor get considerable hot after a flight.
I have just broken in the packs and have increased flight time to 4,5 minutes running 2300 rpm headspeed on 550 blades and are running it on 6S.

Today i took with me an IR termometer and messured temps after flights.
ESC was 122F (50C) and motor 131F (55C) and packs 2x6S 2650mAh 30C 90F (32C)
The first flight gained the highest temperatures as i intendedly did flye the heli to load the disc as hard as possible to se how hot the components would get.
Ambient temperatures was 73F (23C)

As i understand the motor can take alot more heat but what about the ESC?
I have put on extra heatsink to make it operate as cool as possible.

[Justin Stuart]

My Scorpion motors get so hot that I can barely put my fingers on them for more than a few seconds. I would equate it to a steaming cup of coffee in a thin paper cup. But this is normal and nothing to worry about. The magnets and wires in the motor are rated to a much higher temperature then this.

The Jive will slow down if it gets too hot forcing you to land, so don't worry about it melting down. When touching the heat sink after a hard flight, my Jive is not at hot as the Scorpion motor but it is still pretty warm to the touch.

Yes, the ambient temperature in Dallas, Texas is much hotter than in Trondheim, Norway, but based upon the information you have given I would say you have nothing to worry about.

[Mr.Andersen]

Thanks!
So nothing worce then thermal shutdown of the ESC.
Have experienced that when running the motor on 12S.
The motor was branded as 4025-630 but turned out to be a 4025-1100.
The motor got really hot and the ESC started to reduce power after 3 minutes of flight.

[Justin Stuart]

Yes, the Jive has internal protection against overheating. It will slow down instead of burning out. Very nice feature.

[Mr.Andersen]

Do you run your scorpions in onely mode 4 ore are you using mode 10 in adidion?
I do that as i was afraid of the "high" temperature of the ESC and motor.
Mode 10 makes bought run a litle not so hot compared to onely mode 4.

[Justin Stuart]

I have never used anything but Mode 4 in all of my Jives and Jazzes.

[RobertAbles]

Those numbers are very normal for that setup.

the motor components are good over 300 degrees and the esc is good to probably 190ish.

I know the CC escs you need to worry about temps over 190...

In Dallas this summer, my 4025 and ICE 100 are flat out hotter than hell and running great.

Haven't checked in a while, but with Ambients over 100 here, I guess I'm close to 200 on the motor and 160's on the esc after a 4 minute flight.

No shutdowns or issues at all.

[Justin Stuart]

In Dallas this summer, my 4025 and ICE 100 are flat out hotter than hell and running great.

In Dallas this summer, my equipment is hotter than hell just sitting in the shade before my first flight of the day. It's something like 109F (42.7C) today.

I wouldn't mind spending a few weeks in Norway to cool off. I would love to have the ambient temperature be 73F (23C).

[newhelliguy]

It is well within limits, but check your gear mesh after the gear is warm.
Some of the gears expand and put a lot of strain on the motor.
Spin your head CCwise so the motor is engaged and see if it spins as freely as when it is cold.
My 700 was hard to spin when warm even though I had the mesh correct when it was cold.
The CNC gears do expand more than the plastic gears, so you need more play when it is cold. I found the high spot and used 1 piece of paper and it is now perfect.

[Mr.Andersen]

OK thanks again.
As these is my first big heli im quiet nervous about temperatures.
Havent flown anything bigger then my 450 on 4S setup before.
Its unboggable with ESC and motor just over 100F after a hard flight but if higher temps in a bigger E setup is normal im going to remoove mode 10 and see what i get.
I have been warned about running the Jive on 6S with these motor as it may cut off from to high amp draw.

[Justin Stuart]

If the motor ever shuts off or slows down, be sure to count the number of the flashing lights before you unplug the battery. Then you will be able to tell if it shut down from overheat or overamp. Overheat can be cured with a bigger heat sink. Overamp will require a larger ESC. But it's really easy to walk out to the helicopter after a forced landing and unplug the battery before you remember to look at the error code.

[Mr.Andersen]

Will the overamp protection shut down the same as the overtemperatur shut off ore does it just stop the motor imediatly?

Bigger ESC is out of the question as the motor will be swapped with a 4035-500 soon and run on 12S.
The heli is build for 12S speck but i was unlucky with a wrong branded motor and therefore temporarly run it on 6S.

[ollie2893]

I have a temp probe on the motor mount above my -560 and I can tell from my telemetry that within a second or so after landing, motor temps rise by 20%. What I am trying to say is that the motor temps that you measure/feel on the ground are not representative of the actual temps sustained by the motor in flight (while the air cooling is operational).

[Justin Stuart]

^^^ That's interesting. I didn't know that.

Will the overamp protection shut down the same as the overtemperatur shut off ore does it just stop the motor imediatly?

The Jive appears to have 2 modes of shut-off. A slow down, and a hard cut off. If Jive begins to overheat, it will most likely just slow down. But if you pull too many amps (i.e. too much collective during tic-tocs) and it is running hot, it appears to completely shut off and then start back up again a few seconds later. The BEC never shuts off. Only the ESC. I've had this happen where all of a sudden I lost power during some hard maneuvers, and then as I was autorotating down, the motor started to spool back up again to full power. The Jive manual is a little bit lacking in clarity as far as Jive behavior, but the flashing lights you get as an error code will tell you what happened.

[Mr.Andersen]

Then i think i leave mode 10 on as it reduces the amp draw of the motor bye lowering the timings and PWM frequency.
My bird is heavyer then a stock L500 with one 6S 5000mAh pack allso making the motor work harder.

The last thing i wont to experience is a shut off in mid flight.

[Big Fil]

Why is would your 500 be heavier than the average 500 with 6s 5000? That's the most common pack size for that heli.

BTW, your temps are right in line.

[Mr.Andersen]

Becouse im running 2x6S 2650mAh 30C packs intended fore 12S setup.
These packs allso made the heli nose heavy making me put 100g of weight on the tailboom.
And im using Logo 600 canopy and landinggears pluss a paralell harness to plug the packs into the ESC.
Everythings add up and my heli weighing 3,3kg.

[Big Fil]

OK gotcha, realized that I misread your last post as if you were using 6S 5000s currently.

[dl7uae]

Sometimes I get bored: Cutoff limits.