Lathe motors on 14.4V

[SR5Dave]

KICKS ASS!!! They have hordes of torque (as always) but not only that they get some very decent RPM. It also takes about half a second for my 20# rig to go from 0-Full

Running about 25 min just blasting around the yard (including slams from forward to reverse... I was stress testing ) the motors BARELY got hot, my EVX also just barely got warm.

So those of you with Lathe motors, run a few extra cells on them (Or a whole extra battery) remember, they're MADE to run on 12V (car battery) which means they are probably built to handle 14 (car running) They're AWESOME. 9tooths and 14.4V, TONS of torque, LOTS of low RPM control and torque, and still hop up and get it when floored.

I'll get a vid sometime, I still have to redo my suspension and steering

[SR5Dave]

Nobody cares? :P


Been testing a lot today, tuning the new rig, works AWESOME! Just gotta hard mount the shocks (been using zip-ties to perfect a location) and I am redoing the steering.

I also NEED metal rod ends :? I've been wasting em every run. My last crash was a jump off an 18" cliff and I nuked two ends. (at least I know my links will hold up ) K-Rocks are proving less than stellar. I'll try some heat treating or simple green and see where that goes...

[cman_1500w]

Sounds cool!

I'd like to see a video showing the benefits of this. I remember you had some of your clod a while back.

I'd really like to see how much grunt your new setup has!

[SR5Dave]

Its got WAY more torque, but less HP.

Once its running good I'll definetely have some new videos. Even with a 20# rig and a 19" wheelbase it still lifts the front tires Stability is great now that I lowered it. Could do better at sidehilling though. (Hopefully I can fix that with some BBs/water)

Those Krocks need some heat treating too

[cman_1500w]

Can't wait to see it! Got any pics you can show us till the vid comes?

Lifting tires will always be there I think. I'm usually able to bring the tire down by lightly blipping the throttle in reverse. Sometimes I can find the sweet spot that'll let me climb an obstacle. Careful driving and control is what counts here I think.

I've heard the k-rocks suck. You're heat treating may be just the ticket to make them suckers work!

When I had alot of bb's in my tires someone recomeneded I sprayed wd40 in them. This helped them to roll around BUT it also softened them up....BIG TIME!!!! Maybe this will work on the k-rocks?

[SR5Dave]

Originally Posted by cman_1500w

Can't wait to see it! Got any pics you can show us till the vid comes?

Lifting tires will always be there I think. I'm usually able to bring the tire down by lightly blipping the throttle in reverse. Sometimes I can find the sweet spot that'll let me climb an obstacle. Careful driving and control is what counts here I think.

I've heard the k-rocks suck. You're heat treating may be just the ticket to make them suckers work!

When I had alot of bb's in my tires someone recomeneded I sprayed wd40 in them. This helped them to roll around BUT it also softened them up....BIG TIME!!!! Maybe this will work on the k-rocks?

I'll see if I can get some tonight, broken rod ends and all.. I mean lifting tires from a start, just from the torque. Funny that WD40, an OIL would soften tires, you'd think it would just make em slippery.

Maybe I'll spray them with WD then torch em a bit :POOF:

EDIT: I can't find the camera.... so no guarantees...

[kevinlongisland]

hey, whats up dave. thanks for the testing. It's good to know they can handle the voltage. Did you see my adjustable ride height rig? works good, especially when side hilling on steep stuff and when your trying to get up stuff that's near vertical.

[Jam1sstang]

Originally Posted by SR5Dave

Its got WAY more torque, but less HP.

Once its running good I'll definetely have some new videos. Even with a 20# rig and a 19" wheelbase it still lifts the front tires Stability is great now that I lowered it. Could do better at sidehilling though. (Hopefully I can fix that with some BBs/water)

Those Krocks need some heat treating too

How do you figure it has more torque but less HP?

Here is the formula
Torque in Inch pounds=(Horsepower x 63025)divided by Motor RPM

I am confused on what you said. Please explain how that works?

[SR5Dave]

Originally Posted by Jam1sstang

How do you figure it has more torque but less HP?

Here is the formula
Torque in Inch pounds=(Horsepower x 63025)divided by Motor RPM

I am confused on what you said. Please explain how that works?

Well, it has a lot of GRUNT but no high top end. I'm using torque and horsepower as seat of pant refrences, not by actual numbers.

Even then, I think those equations only apply to gas motors.

No prob Kev! Give em a try. Motors got a hair warm but I could still put my hand on em after about 20 minutes (And then I broke two rod ends )

I haven't seen your new rig yet!! Link?

[kevinlongisland]

i'll be putting a post up soon about the truck.

[Jam1sstang]

SR5Dave, OK i see what you were saying. And it does apply to Electric motors as well. I am going to be putting 2 55x1 motors on my Maxx crawler project as well. If I ever get some time to work on it.

[SR5Dave]

Originally Posted by Jam1sstang

SR5Dave, OK i see what you were saying. And it does apply to Electric motors as well. I am going to be putting 2 55x1 motors on my Maxx crawler project as well. If I ever get some time to work on it.

You'll like it. Its so much power, run times are still AWESOME too. I've been one two batts for a good hour of hard pounding, not just crawling (I had to show off to my engineering buddies )

I am really impressed at how awesome these motors run. It just hauls. I have enough power to spin the tires on ANY obstacle, and there is SO much control.

I've got some pics and videos (if I can get em off the camera)

[SR5Dave]

Speed tests:
http://www.hisgirl.net/RCtruck/10042004/DSCF3504.AVI
http://www.hisgirl.net/RCtruck/10042004/DSCF3505.AVI

No tire lifting, batts were a bit tired. Even then its minor, but you can watch the front tires spin. Lots of power.

Man, my kitchen looks like an f'in MESS in those vids... Its not that bad, I sware

[kevinlongisland]

yeh man, clean that place!!!!!!!!!!!!!

[SR5Dave]

Hey, I clean it up before people come over, isn't that what counts?

Come on up this weekend, I'll have it clean :P Dana is going out of town anyhow, and my rig is running

[kevinlongisland]

come on down here. fireman and i have plans to crawl on saturday.

[SR5Dave]

Originally Posted by kevinlongisland

come on down here. fireman and i have plans to crawl on saturday.

I haaaaaaaaaaate phoenix. I'll consider it though! what time?

I'm spoiled by this nice weather :P

[kevinlongisland]

if your coming down, we'll set our plans around whatever times are best for you. but fireman is not a definite yet.

[SR5Dave]

Originally Posted by kevinlongisland

if your coming down, we'll set our plans around whatever times are best for you. but fireman is not a definite yet.

If my servo's get here I'll come down. If not, I'm having issues with this 1/4 scale one (My EVX REALLLY does not like it!! Even with a reciever pack) That and I can't get it to top bending/breaking things.

I just made a run without the extra batt.. and I can't see how I'd ever use lathe motors without two batts. They're got SO much more rpm, enough to fling my way up 16" cliffs

[kevinlongisland]

Originally Posted by SR5Dave

If my servo's get here I'll come down. If not, I'm having issues with this 1/4 scale one (My EVX REALLLY does not like it!! Even with a reciever pack) That and I can't get it to top bending/breaking things.

I just made a run without the extra batt.. and I can't see how I'd ever use lathe motors without two batts. They're got SO much more rpm, enough to fling my way up 16" cliffs

yeh, an evx is not the best option when using a 1/4 scale servo. i heard someone else was also having problems with a 1/4 scale servo even when running the rx pack. Breaking things! over 300oz/in will do that! yeh, i have to try my lathe motors on increased voltage.