tenshock brushless motors

[himalaya]

Originally Posted by lutach

I can forward all the e-mails and MSN messeges to you if you like. I'm just saying it's kind of wrong since they had no plans for a car motor, but all of a sudden they have them. I gave them a lot of information and even mentioned a few other things which they didn't add to their motor (Which is good).

Sorry for the misunderstanding. I have no doubt about what you said. The thing that doesn't make my sense is how they were saying different words to different people. They are seemingly going to come up with many car motors from 1/18 to 45mm big ones for 1/8 vehicle from what I learned at a LHS here in Beijing.

[BL_RV0]

No wrapping, bleh.

Maybe lincpimp could wrap these in kevlar like he did with that hacker motor a while back...

They showed me a pic of a car motor in a losi 8ight. I might be getting one just to see how they hold up.
Have you heard anything about these motors lutach?

[lutach]

Originally Posted by drkdgglr

They showed me a pic of a car motor in a losi 8ight. I might be getting one just to see how they hold up.
Have you heard anything about these motors lutach?

Other then giving Tenshock a lot of information and waiting for a sample....They say the rotor design doesn't need to be wrapped with anything. I showed Echo Chen a few pictures of failed rotors, but I don't know if they made it that way.

Here is the last e-mail I got from Tenshock:

Hi,Luciano,

Ok. Noted.
I will send you three motors first for you testing.I will inform you the tracking no. when i send the motors.
But have to point out again, those are for boats. Not good for car use.

In the beginning of Apirl we will have two long motors. One is 40mm the other is 57mm.
We make those for our customer for Helicopter use.

I will ask my engineer to make a sample as you require in the end of this month.



wishes,

Echo
2008-03-19
TenShock

[lutach]

So they basically used some of the information I sent them and again I got nothing in return. Good thing I know a few other motor manufacturers that can make motors to my standards at a good price.

Here's some pics of a tenshock 2240/10 (1530kv, 2200watt max power) car motor next to a 60mm medusa and a tekno neu 1515. Installed the motor in a mini ste, almost ready to try it out.

here's a picture I got from tenshock:

[BL_RV0]

Rather strange- no wrapping at all on the rotor...
Drkdgglr- have you had time to test the 2240 yet?

[lutach]

If it works out without wrapping the rotor, then it's good. When I was talking to them about making a motor for car, they said it didn't need due to the way it's held in place. How is the motor running on your application(s)?

I'm almost ready to run the motor. Just need to hook up the eagletree with temp sensor. It's getting dark here soon, so it won't be before the weekend.

I'll be running the motor in the mini ste first (4.8lbs) and when my E-Maxx is ready, it'll go in there (+/-7lbs).

I'm geared 18/42 which should give me about 39mph without ballooning. The medusa 1300kv, geared 20/42 (37mph without balloning) ran gps verified 50mph and stayed very cool onroad. Offroad it would heat up, so I changed to 18/42 with the medusa&off road.

[Kcaz25]

rotor looks ugly and kind of inefficient.

[littlegiant]

Originally Posted by Kcaz25

rotor looks ugly and kind of inefficient.

Yeah it looks heavy with all the metal in it. And definitely ugly!

[florianz]

Originally Posted by littlegiant

Yeah it looks heavy with all the metal in it. And definitely ugly!

...that's definately an important criteria

To me that looks really solid, clever idea, and is probably cheaper to manufacture.

Wrapping may NOT be the ultimate solution:

my Losi Xcelorin's Kevlar bonding/wrapping of the rotor got damaged by sand that got into the motor. That almost killed the rotor, I was able to fix it by putting super glue on it a couple of times. like that the kevlar didn't get loose any further.

The rotor of a mate's Losi xcelorin got seriously damaged like that: the magnets got loose, he didn't put super glue on it, then damage was too much.

They say that the newer rotors of the xcelorins (1/8) have now carbon-wrapping.

an other downside of a wrapping is:
it needs space, but the less space between the winds and rotor, the better.

[littlegiant]

Originally Posted by florianz

...that's definately an important criteria

To me that looks really solid, clever idea, and is probably cheaper to manufacture.

Wrapping may NOT be the ultimate solution:

my Losi Xcelorin's Kevlar bonding/wrapping of the rotor got damaged by sand that got into the motor. That almost killed the rotor, I was able to fix it by putting super glue on it a couple of times. like that the kevlar didn't get loose any further.

The rotor of a mate's Losi xcelorin got seriously damaged like that: the magnets got loose, he didn't put super glue on it, then damage was too much.

They say that the newer rotors of the xcelorins (1/8) have now carbon-wrapping.

an other downside of a wrapping is:
it needs space, but the less space between the winds and rotor, the better.

Y not just wrap the rotor with an ultra thin heatshrink over it? Just kidding. Hey u have have a very good point there. I didn't realise that sand can damage kevlar wrappings. But how did sand get into the xcelorin motor in the first place? Aren't the endbells sealed?

[lutach]

The problem is not the Kevlar, but the Epoxy used. Most epoxy works best with carbon fiber. I'll be waiting for results on vehicles running this motor(s).