Direct Drive to Diff E Revo Build

[lincpimp]

Good to hear that this custom wind works better. The kv must be lower, if the spped is slower, maybe 280kv? That would be a wild guess!

[sikeston34m]

Originally Posted by lincpimp

Good to hear that this custom wind works better. The kv must be lower, if the spped is slower, maybe 280kv? That would be a wild guess!

No, it's alot higher than that. The factory wound 20 turn Delta was 305kv and that was using a really small ga. wire. The AXI 4130/16 Delta is 385kv.

Check this out:
http://www.rchotdeals.com/Products/r...or/A41308.html

It's a 4130 6 turn Delta rated at 510kv, but it doesn't show the Resistence values of the wind. Resistence means alot. Even if you have two motors with the same amount of turns, the one with the least resistence will make more power and more kv.

The Wye wind has 1.73 times the torque of a Delta but 1.73 times less kv for the same wind. That's why I dropped a few turns to make up for that.

I'm sure it's over 400kv, but I wonder if there's a way to figure this accurately.

[lincpimp]

Well you could radar both on the same number of cells and then fiqure it out backwards. I am sure that there is some mathmatical way of figuring it out. I see that my guess was a bit wild! I just thought you said it was slower on the same number of cells as the other motor.

[sikeston34m]

The other motor I was referring to was the 4120/14. It's a 660kv motor.

I didn't really get a chance to top it out good even on 4S. It's pretty dark out there and they just graded the gravel road in front of my house. It doesn't take much to slip and slip on that stuff.

[lincpimp]

hats cool, thought that you were talking about the 4130 motor you had in there before, I need to re-read the thread, my memory sucks! How is the new emaxx coming along? Are you going to do a custom wind, or the motor we were discussing? I have to finish my other rc projects before I start on the new emaxx!

[sikeston34m]

Originally Posted by lincpimp

hats cool, thought that you were talking about the 4130 motor you had in there before, I need to re-read the thread, my memory sucks! How is the new emaxx coming along? Are you going to do a custom wind, or the motor we were discussing? I have to finish my other rc projects before I start on the new emaxx!

I'm thinking this is about a 500kv motor that's capable of over 100amps. The Croco site stated that a single strand of 18awg would max out around 50amps. It stated that was about all 18awg 200C rated wire could handle. This custom wind has 6 strands of 22awg 200C wire. (note: most manufacturers use 30awg wire)

I went with the 4130 because of the longer magnets and the longer stator. I knew it would make alot more torque. The wye wind seems to give alot better EMF back to the ESC. I believe this is why it is working better.

My Tower order will be here either tomorrow or Wednesday. In it is a 2826/10 for the E maxx. I'll probably set it up and play around with it until I can get the 2 speed kit. I need another Quark ESC though.

I really think it will work GREAT with the factory wind, but we'll see. I know it's not really gonna rock until I get the 2 speed kit.

I think I have enough gears here to get the most out of the factory wind in 1st gear. Get the setup right where it doesn't cog at all with 1st gear, but tops out the highest. Then I KNOW 2nd gear will just give a huge top speed boost.

It should Rock and Roll.

[lincpimp]

Sounds good sike, can't wait to see how the emaxx goes. I may have to pick up a smilar motor. Are you going to run a quark 80, or the 125?

[sikeston34m]

Originally Posted by lincpimp

Sounds good sike, can't wait to see how the emaxx goes. I may have to pick up a smilar motor. Are you going to run a quark 80, or the 125?

I have to send my Quark 80 in to get it fixed. If I don't come up with a ESC really quick, the Monster Pro 125 that I have will be jumping back and forth between the E maxx and the Revo.

Do you know of any place that sells the Quark Air Master ESC's? I've been playing around with brushless boat ideas. The Air Master's would work great for that.

[lincpimp]

Originally Posted by sikeston34m

I have to send my Quark 80 in to get it fixed. If I don't come up with a ESC really quick, the Monster Pro 125 that I have will be jumping back and forth between the E maxx and the Revo.

Do you know of any place that sells the Quark Air Master ESC's? I've been playing around with brushless boat ideas. The Air Master's would work great for that.

May I suggest the hydra 120 or 240. Thay are purpose built esc for boats, and watercooled. What do you want to run, inrunner or outrunner? All of castles boat escs are good to 6s and will work with wheel radios.

I have both an airmaster 80 and 125. Nice esc, but they need the heatsink mods just like the car versions. They will work with a wheel radio without a pixstix adapter.

The supervee 27 motor and esc are good to about 3/4 hp on 4s lipo. The esc is waterproof and water cooled, and the motor is a 6 pole inrunner. It is agreat sytem, can push a 30" boat over 40mph with the correct prop. Plus it is cheap! Both tower and horizon sell the air masters, if you really want one let me know and I can get you a deal.

[sikeston34m]

I checked out the Supervee, and it's tempting. But I think I would like a Deep V hull better because of the added stability.

I'm really unsure what I want in the boat realm at this point. Something stable and kinda quick. Not too fast though. Mainly just something to play around with out in the Big Boat when the fish aren't biting.

I think I can get my Lady into boats. She seems interested.

I didn't see the Air Masters on Tower. Horizon is pretty proud of them though.

On the E maxx subject, it won't be so demanding because of the lower gear ratio. This will eliminate cogging and allow the use of a much higher kv motor.

I wanted to challenge myself with this Direct Drive Revo. But it has been such because of the 4.3:1 FINAL gear ratio.

[sikeston34m]

I have a good unaltered Revo Tranny on Ebay if you need a spare.

It's gonna go cheap.

[GriffinRU]

Originally Posted by sikeston34m

@Johnrob - Is there any way to estimate the KV rating of an AXI 4130 4 turn wye wind? 6 strands of 22awg?

Estimate - Hard
Measure - Simple

Apply fixed (measure) voltage - measure RPM
Spin with fixed (measure) RPM - measure voltage

[lincpimp]

Originally Posted by sikeston34m

I have a good unaltered Revo Tranny on Ebay if you need a spare.

It's gonna go cheap.

I have it watched, thanks for the heads up. When are you going to part those two new emaxxs?

[sikeston34m]

Originally Posted by lincpimp

I have it watched, thanks for the heads up. When are you going to part those two new emaxxs?

I'll probably start putting parts up late in the week or the weekend.

[lincpimp]

Feel like selling me a tranny? How about the complete chassis, tranny and steering setup? I have the bulks and a set of aftershock diffs. Plus I have a set of hybrid bulks too.