Seaking 180 ESC RPM Question?

[Howard]

hmmmm maybe that's it Doc, I tried the black line you mentioned with the same results. It's 7:30 am here.

I also have the same setup in a REd Evo that I have and with 3S it runs at 30,000 rpm and with 4S it runs at 40,000 RPM's which is normal. So if you are correct about the 2 pole and 4 pole how do I fix it? Or is there no fix?

Howard

[Howard]

OK Doc have a peaceful sleep :-)

I just did some research and discovered the Ammo motors are 2-pole. So maybe your on to something.

So I'm wondering my options now. 1) will I fry the motor running it this way? Should I lower the timing on the ESC maybe?

Or just use a different motor with this ESC?

Thanks for your help, I think were pin pointing this problem

[drwayne]

The catch22 here ( the twist ) is that if the 2 pole is actually driven twice compared a 4.giving us 2S@2600kv=45krpm, then why does 3s@2600kv act like a 4pole with 35krpm ?
Ive not taken a T180 apart to learn scripts or limits, I design things, not copy them.!
I recall reading something about 60k rpm firing speed limit
However, not all esc work for all motors.
Grab a diff esc.. swordfish/aquastar/hifei120A will fit this bill..


Id guess Jay is lurking about somewhere.
comments ?

W

[Howard]

Well Doc I did try a different ESC today ( I guess we think alike) and had the same results. I then put the boat in the water and it ran OK until I gave it full throttle. It ran for about 15 seconds and then started to slow down drastically. I brought it in and the motor was smoking at 155 F. Conclusion... The motor was/is bad. It's funny because I had a similar problem awhile back with a used boat I bought and didn't think about it until today. The motor also screamed and got real hot on land. I never used the motor and just figured it was bad. Now that I think back and with this incident my conclusion is if the motor screams like these did there's something wrong internally as apposed to a motor that is just dead and doesn't run.


Howard

[drwayne]

722am
glad you have it sorted.
B)