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-   -   2100watts too much for Slash. (https://www.rc-monster.com/forum/showthread.php?t=18178)

coreyfro 01.20.2009 08:14 AM

2100watts too much for Slash.
 
I'm beginning to think that three horse power is a bit much to stick in a Slash. My MMM, my Lehner XXL 1800, and my 6S, 3000mah Lipo survive, per charge, longer than the rest of my ride does.

In otherwords, my v3 hasn't cooked, yet...

...I know Murphy and his *@#$@#$ laws, he'll most likely fry it..........niow...but I'm willing to risk it!

pasan 01.20.2009 09:29 AM

Uh yeah... what's the point of running a slash with that much power? They're already uncontrollable on 3S with about 700w of power. You might fry it through utter silliness though, probably the transmission exploding and shorting out the motor and everything else. Get a slayer and use your setup in that instead.

coreyfro 01.20.2009 09:42 AM

I bought the XXL 1800, actually, for running with a 2S. I wanted all the torque I could get at the lowest RPM I could get for robotics. The 6S battery was an impulse buy. I need to pawn this thing off before it bankrupts me.

Quote:

Originally Posted by pasan (Post 253973)
Uh yeah... what's the point of running a slash with that much power? They're already uncontrollable on 3S with about 700w of power. You might fry it through utter silliness though, probably the transmission exploding and shorting out the motor and everything else. Get a slayer and use your setup in that instead.


pasan 01.20.2009 09:54 AM

There are motors with much lower RPM than that. There are outrunners in the range of hundreds of KV, and pretty small ones at that.

t-maxxracer32 01.20.2009 10:20 AM

if you were to get a 500kv motor wouldnt you need more than 6s to run it?

i realize that the lower RPM the more efficient but a slash with a mm 5700 system in it would still kick ass and be alot more controllable.

coreyfro 01.20.2009 10:31 AM

With my setup, the bot drives at one half a mile per hour per tooth, max with 2S or 8cell NIMH. The 6S was an impulse buy and a mistake

Quote:

Originally Posted by pasan (Post 253983)
There are motors with much lower RPM than that. There are outrunners in the range of hundreds of KV, and pretty small ones at that.


pasan 01.20.2009 10:37 AM

I just read up on the XXL 1800... the shaft is 4MM? Where do you find pinions with a 4mm bore?

coreyfro 01.20.2009 11:02 AM

I bored them on a drill press.

Mount the pinion in the chuck and a 5/32nds drill bit in the vice. Works for gears 18teeth steel pinions and up. Anything below that and the pinion will deform when tightening the set screw. 5/32nds is about 3.9mm, but that .1 mm difference is about how much error you'll have from this process.

To key the shaft on the XXL (because it is unkeyed) take a dremel and etch a tiny ding in the case hardened shaft, just enough to mate with the set screw, and no larger. If the color of the shaft changes, you should not cut any deeper and may have already etched too far.

Quote:

Originally Posted by pasan (Post 253996)
I just read up on the XXL 1800... the shaft is 4MM? Where do you find pinions with a 4mm bore?


E-Revonut 01.20.2009 01:22 PM

You could always seperate the pack into two seperate 3s packs!

What's_nitro? 01.20.2009 02:05 PM

@ Coreyfro

Just make sure your wheelie bar is in good working order and you'll be fine. :yes: I wouldn't be worried about power until you get into the terawatt range....

t-maxxracer32 01.20.2009 02:29 PM

linc can do the lipo separation.

slimthelineman 01.20.2009 08:16 PM

kinda off topic but why are most so hesitant to solder on lipos? i have built and repaired several of my own packs as well as others for my buddies. the only thing special i do is cover all tabs i am not currently working on with a piece of 3m 33 vinyl tape to prevent shorting w/the soldering iron.

just curious thats all.

1maxdude 01.21.2009 06:56 PM

Gear that bastard up and see what she can do!

crazyjr 01.22.2009 02:17 AM

Quote:

Originally Posted by coreyfro (Post 253962)
I'm beginning to think that three horse power is a bit much to stick in a Slash. My MMM, my Lehner XXL 1800, and my 6S, 3000mah Lipo survive, per charge, longer than the rest of my ride does.

In otherwords, my v3 hasn't cooked, yet...

...I know Murphy and his *@#$@#$ laws, he'll most likely fry it..........niow...but I'm willing to risk it!

This sounds like my E-gt conversion :party:,Nice to see another small hi-volt setup. I'm running a basic XL 1200 lehner w/quark 80 and a 5s 2500 flightpower 25c lipo, I haven't seen that power out of it yet though


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