Total Melt Down! Why??

[olwarbirds]

My Neu 1515 2200kv at 15* timing ran 25 degrees hotter than at 5* timing and drew significantly more amps, only thing I changed was the timing...going to try 10* and see what happens.....maybe there is a prob with my motor... thought also I had read somewhere about Neu motors and timing, might of been about the D winds though..

[olwarbirds]

Here is what I was referring too and it was D winds... to many boat setups... http://forums.offshoreelectrics.com/...nd-quot-Y-quot

[tlandauer]

Well, I had another Neu 1515 1y in my Mean Machine, 4s2p set up, M545, timing at 15*, no problem. I realize it is a different hull.
All my "Y" winds have been set at 15*, but I will try a lower setting after motor is returned to me just to see the difference. it's on the way to the factory, lol...
This Neu is somehow different than the one I bought earlier for my MM, the screws for the rear endbell is not recessed on the side , so there are production changes, not that it played in a role of what happened today.
I might add that I ran the same prop on my Insane 34 mono with a Castle 1515 1y and , 15* setting. That is an awesome motor as well.

[olwarbirds]

Tks Tim, for info, it was just a thought as something else to try. I think that its possible I damaged mine running way to high a watts and amps... I got a couple other 1515 2200kv I will try one of them at 15* in that boat and see what happens... DJ

[tlandauer]

Thanks for chiming in DJ!
The funny thing is that I am rather amused by the event since I had great reservation running that boat as I had a feeling something was going to happen. As you know, I have way too many boats , so this was the first time I had time to come back and address the cooling problem and of course I had to pick an 100* day and an aggressive prop .

[jcald2000]

A 3 blade compared to the same size 3 blade on the same boat drew 31% MORE amps according to my E/T data logger!!!

[tlandauer]

A 3 blade compared to the same size 3 blade on the same boat drew 31% MORE amps according to my E/T data logger!!!

Wow! Thanks for chiming in!

[Doby]

Could the failure have been caused by poor driving skills

[tlandauer]

Could the failure have been caused by poor driving skills

LOL... not ruling anything out!
Just checked my video, the length is actually shorter, 2 min. and 8 sec. and that includes the launching which took a good 10 sec. and the slow reaction of the videographer to turn off the camcorder upon seeing the boat is stuck out there in the water. ( my 77 years mom )
The drive was 90% WOT except for the last few seconds for a slow pass by to see water from outlet.
I believe everything that has been said, and the temperature of the season +the choice of the prop in that weather played a big roll in contributing to the failure, but I still go back to my January puzzlement over the temp on the motor. You have seen my video of the boat run, one suspicion would be that the label on the motor might be wrong and it's a "D" wind with a different kv? I forgot to check the wires inside the endbell to see if this is the case with regard to my theory on the wind of the motor.
Then again, what do I know? I would be at the nats if I know more....

[Doby]

Don't need to know more to be at the Nats...most of us are living proof of that!

[MarkF]

Tim

15 deg timing is nuts. In all my Neu set ups, oval or strait line, I run 0 timing on D winds and Y winds. You can run higher timing if your going to run a small prop but don't see a reason to do so when all it does is add maybe 3 to 5 mph and more heat into the controller. I played with high timing a long time ago and got tired of burning up controllers for a few mph. Why bother unless your few mph off a record at a saw event. A stock 447 is fine on your motor but you have cup in yours and that adds pitch. The hot weather and 15 deg. timing is your culprit. Turn your timing down and you will have happy a controller. And before anyone feels the need to tell me there high timing story just know that I have been racing for 20 years and know quit well what timing can do for you. Anybody who has seen my boats run will know 0 timing hasn't hurt my speed any.

Mark

[tlandauer]

Mark,
Many thanks as usual! Hope to see you soon...
Tim

[kfxguy]

So....I remembered when I first put my 32" rivercat together I had a 1515 2200kv castle with a three blade prop.........this was the result in about 45 seconds...

[MarkF]

I think that was a common problem with the fightercat esc and not your set up. Also the harder your going to push your equipment the more you need 0 deg timing.

Mark

[tlandauer]

Yikes!
I must say that my ESC is fine and the temp is on the motor, not just yesterday, but in winter as well.
Anyway, I will prop down and do other experiment.
While motor is in factory, I will use a TP motor, 4060 3y. Will post results when I get to it.