tenshock brushless motors

[himalaya]

Originally Posted by littlegiant

Doesn't look like there's any wrapping.

they have no fiber wrapping at all. The magnetics are wedged into the steel core, so the core's edges hold them in place. This is totally different from all others that I saw. I can take some detailed picture if you guys like to.

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!

the finned tenshock motor weighs app. 280-290 grams which is the same as a 60mm medusa or a smooth can neu 1512. From tenshock I understood that the holes you see are made to balance the rotor.

[littlegiant]

Originally Posted by drkdgglr

the finned tenshock motor weighs app. 280-290 grams which is the same as a 60mm medusa or a smooth can neu 1512. From tenshock I understood that the holes you see are made to balance the rotor.

Seeing the holes on only one side of the rotor is telling me that the rotor was seriously off balanced to begin with. But I am sure that Tenshock will come out with better rotors in due time. :D

[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).

I just ran mine, but I had to stop because the rear casing flew off after an agressive cartwheel. Guess I'll have to use glue to hold it in place.

I had the eagle tree with me, but somehow it's stuck in recording mode and my pc won't recognize it...

[florianz]

Originally Posted by littlegiant

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?

The front/endbell are closed; but there are various mounting-holes for the screws in the frontbell, and that's enought to let sand in, which sands off the first layers of the kevlar. if you don't act early enought (sealing the holes wich are not used, sealing the kevlar-fibres with super glue), the magnets get loose.

I didn't believe what I saw when I opended the motor the first time, lots of sand, damaged bearing, damaged kevlar. Even though I keep my car clean inside!

[Unsullied_Spy]

I've heard these motors are quite expensive, nearly as much as a Neu. I'd rather have my money go to Neu than some Chinese company any day.