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-   -   Mamba monster and two 5700kv? (https://www.rc-monster.com/forum/showthread.php?t=24086)

its me 10.17.2009 04:07 PM

Mamba monster and two 5700kv?
 
Hey guys been a while, been kind of busy with 808RC building a HUGE rc track for hawaii..

Im also getting into CLOD racing, since I have a spare Monster would it be possible to run two 5700kv of the monster? or any advice on how to do it would be greatly appreciated!

oh an pics of the track!

http://img59.imageshack.us/img59/3026/sandbox4001.jpg

http://img97.imageshack.us/img97/5476/sandbox4002.jpg

http://img59.imageshack.us/img59/5808/sandbox4003.jpg

http://img16.imageshack.us/img16/1701/sandbox4004.jpg

"be cuz aaaahh dare was no sign manong"

http://img188.imageshack.us/img188/9359/sandbox4005.jpg

For you smaller scale guys.
http://img97.imageshack.us/img97/693/sandbox4006.jpg

An the rest of the track
http://img16.imageshack.us/img16/9390/sandbox4007.jpg

What a way to end the day!

http://img16.imageshack.us/img16/544/sandbox4008.jpg

BL_RV0 10.17.2009 04:17 PM

It could be done I suppose. AWESOME track BTW!!!!

bdebde 10.17.2009 04:43 PM

Two motors on one esc can be done, but they need to be "in sync" as on a common spur with rotors in the same position. Driving seperate axles will not work, as the motors will almost never be "in sync".

doo540 10.17.2009 06:05 PM

Were is the drivers stand? On a hot air balloon right above the track? That thing is huge!!! (thats what she said.)

doo540 10.17.2009 06:10 PM

btw
I will be using a MMMV3 on 2 (2s 5000 in parallel) so 2s and 10000mah in my clod driving the stock brushed motors. I "may" pick up some hotter brushed motors if it seems to slow.

Unless of course you figure out some reasonable way to run two brushless motors on one monster.

Anyone ever tried to run 14.8 volts thru stock brushed motors? Just a thought if I get bored with the parallel version I can always go series very easy. lol

redshift 10.17.2009 06:50 PM

It's my understanding that any twin-BL motor setup will always require 2 ESCs. Even using the flat on the shaft for reference is useless. The flats will have been ground at a random point in relation to the rotor. Sounds like trouble to me... but if you're game then give it a shot.

doo, 14.8 (16.8) lipo will overcurrent your brushers. I bought crap MA packs before going BL on my Maxx, still got the stock titans over 300F. Fried 'em proper, melted both armature fans, stunk like hell...

I did however run 2 of the old Traxxas 'stinger' motors on 14.8 Nimh, those were 7.4V motors, they ran hot, but it worked ok.

Rivermaxx 10.17.2009 06:58 PM

I read a older post from Joe Ford from castle and he says it cannot be done.

Unsullied_Spy 10.17.2009 07:36 PM

If you don't have flat spots already ground on the shaft and you perfectly sync the motors with each other driving a common spur gear it'll work, I've seen it done. I saw a guy do it and it ran like crap and burned up his ESC, go with a pair of ESCs and save yourself the hassle.

junkman 10.17.2009 07:39 PM

I've got a couple clodzillas I run, 1 stock tamiya motored, the other has some kind of aftermarket 27t motors. You would be suprised how they run on 4s. I don't know how well they would hold up in a race, or for long periods of time, but I have ran mine a fair amount without burning them up, I guess because they are geared so low.

redshift 10.17.2009 07:59 PM

If you cut your MMM very carefully, in half, you might get two Hobbywing 80A speeders out of it.....

Junkman- brushed motors have a very short life with lipos in my exp., and this includes planes, helis and trucks. Normally brushed motors pull more than they're fed with Nimh. But the huge difference in current makes lipo/brushed almost as bad a combo as BL/Nimh, me thinks. Others may have few or no issues, but I sorta doubt it.....

stum 10.17.2009 09:15 PM

Quote:

Originally Posted by redshift (Post 327871)
If you cut your MMM very carefully, in half, you might get two Hobbywing 80A speeders out of it.....

Junkman- brushed motors have a very short life with lipos in my exp., and this includes planes, helis and trucks. Normally brushed motors pull more than they're fed with Nimh. But the huge difference in current makes lipo/brushed almost as bad a combo as BL/Nimh, me thinks. Others may have few or no issues, but I sorta doubt it.....

That is really two things at play iMO... brushed motors were fine w/ nimh because your packs wouldn't last anywhere near as long as the typical 5k lipo so you spent more time cooling than racing :) not to mention only the best nimh would hold as high of voltage through the length of the pack when even compared to a generic lipo let alone a high end matched lipo pack. So it's the current and the run times.. if you run in 7min intervals (less than 10) and let cool they, brushed motors, last a LOT longer. One other thing that happens is the brushed guys are trying to get too many MPH out of their motor more times than not and this too kills the motor quickly.

All just my opinion.. of course :)

redshift 10.17.2009 09:36 PM

Yeah Nimh and brushed play nice together. I'll use a stupid analogy- if a brushed motor was a lawnmower engine, then feeding it stale low octane gas (Nimh) works fine. Now take that same engine and feed it pure ether, NOS, and put a turbo or two on it (lipo,duh).

I've seen it more often than not... but hey most of us won't miss the scorched carbon odor.

Finish 'em off right!

Arct1k 10.17.2009 10:18 PM

Go brushed and then you can use one esc

brushlessboy16 10.17.2009 10:30 PM

Quote:

Originally Posted by redshift (Post 327889)
Yeah Nimh and brushed play nice together. I'll use a stupid analogy- if a brushed motor was a lawnmower engine, then feeding it stale low octane gas (Nimh) works fine. Now take that same engine and feed it pure ether, NOS, and put a turbo or two on it (lipo,duh).

I've seen it more often than not... but hey most of us won't miss the scorched carbon odor.

Finish 'em off right!

I wanna see you run a lawn mower on pure ether or nitrous oxide... wont last long:lol:

junkman 10.17.2009 11:09 PM

Quote:

Originally Posted by brushlessboy16 (Post 327894)
I wanna see you run a lawn mower on pure ether or nitrous oxide... wont last long:lol:

enjoi
http://www.youtube.com/watch?v=GL1tA...layer_embedded

redshift 10.17.2009 11:43 PM

Wow that B&S put up a hell of a fight! :rofl:

its me 10.18.2009 06:14 AM

Thanks for the info guys, I guess im just going to have to go twin sidewinders for the project .

doo540 10.18.2009 08:17 AM

so..
you guys are saying that if I run my clod on stock brushed motors, with one mmm feeding them and lipos, that the brushed motors will die quickly because they will be able to run for such a long time with no cool down period.

JThiessen 10.18.2009 10:49 AM

Dang - you guys are really making me want a Clod. I've missed out on a couple that have been on my local craigslist over the last year. Patience....patience.....

junkman 10.18.2009 10:49 AM

Quote:

Originally Posted by doo540 (Post 327946)
so..
you guys are saying that if I run my clod on stock brushed motors, with one mmm feeding them and lipos, that the brushed motors will die quickly because they will be able to run for such a long time with no cool down period.

well, there are a couple saying that, I am saying I run them off of traxxas evx's in 2 clodzilla's on 4s, and havn't lost a motor yet. They are geared so low that to me it doesn't seem to be a problem. I honestly get kinda bored running them usually before the packs dead. I may not be as hard on them as someone else, but for just running around the yard, street, climbing hills that don't get it hung up, it does fine, and is about as fast as you would really want to go.

its me 10.20.2009 03:32 AM

Quote:

Originally Posted by JThiessen (Post 327963)
Dang - you guys are really making me want a Clod. I've missed out on a couple that have been on my local craigslist over the last year. Patience....patience.....

http://i901.photobucket.com/albums/a...ckslineup4.jpg


me 2 :)

its me 10.20.2009 03:33 AM

Hmm what are your guys thoughts on turnigy ESC?

Erevocanuck 10.20.2009 08:37 AM

I have a clod with a thunder tech racing ripper chassis & I paln to use 2 CC sidewinder BL system on one battery.Castle creations(castle link software) has a option for reverse rotation & one of the motors has to be reverse rotation for the clod

junkman 10.20.2009 11:35 AM

Quote:

Originally Posted by its me (Post 328439)
Hmm what are your guys thoughts on turnigy ESC?

which one are you talking about. I'd say you would be more than fine with 2 60's if you wanted to go that route.

its me 10.21.2009 12:16 AM

Quote:

Originally Posted by junkman (Post 328491)
which one are you talking about. I'd say you would be more than fine with 2 60's if you wanted to go that route.

Have you used the 60's before? Just curious looking for some idea's, id like to not break the bank on this build :)

junkman 10.21.2009 11:19 AM

I do have a couple 60's just in 1/10 off roaders, they have served their purpose well. I don't mess with timing or punch on any of the ezruns, its uncertain how far you can go without frying it. I'd say 80% of the ones that have burnt up floating around the net have had those settings messed with.

BrianG 10.21.2009 11:32 AM

Quote:

Originally Posted by Erevocanuck (Post 328463)
...Castle creations(castle link software) has a option for reverse rotation & one of the motors has to be reverse rotation for the clod

Don't forget, you can swap any two wires of any sensorless system if you want to reverse direction. The motor direction function of the CC software is nice if you want to solder all connections without worrying if it's gonna spin the right way, or having to hook it up temporarily to see. Now that I think about it, that feature is probably more for the sensored feature for the MMPro because you can't just swap wires, but still a nice feature for the sensorless crowd.


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