RC-Monster Forums  

Go Back   RC-Monster Forums > Support Forums > Castle Creations

Reply
 
Thread Tools Rate Thread Display Modes
2100watts too much for Slash.
Old
  (#1)
coreyfro
Guest
 
Posts: n/a
2100watts too much for Slash. - 01.20.2009, 08:14 AM

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!
   
Reply With Quote
Old
  (#2)
pasan
I <3 RC
 
pasan's Avatar
 
Offline
Posts: 157
Join Date: Oct 2008
Location: Colombo, SL | Alpharetta, GA
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.


E-Revo - Mega ACn 22/45/1E MMM 6S
E-Maxx - Feigao 7XL MM 4S
AX10 RTR - Stock :D
Micro-T - Losi LiPo upgrade
Mini LST2 - Discarded. Useless POS.
1/8 Scale Baja Bug - Medusa 36-50-3300 eZrun 60A 3S
   
Reply With Quote
Old
  (#3)
coreyfro
Guest
 
Posts: n/a
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 View Post
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.
   
Reply With Quote
Old
  (#4)
pasan
I <3 RC
 
pasan's Avatar
 
Offline
Posts: 157
Join Date: Oct 2008
Location: Colombo, SL | Alpharetta, GA
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.


E-Revo - Mega ACn 22/45/1E MMM 6S
E-Maxx - Feigao 7XL MM 4S
AX10 RTR - Stock :D
Micro-T - Losi LiPo upgrade
Mini LST2 - Discarded. Useless POS.
1/8 Scale Baja Bug - Medusa 36-50-3300 eZrun 60A 3S
   
Reply With Quote
Old
  (#5)
t-maxxracer32
RC-Monster Brushless
 
t-maxxracer32's Avatar
 
Offline
Posts: 2,184
Join Date: Nov 2006
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.
   
Reply With Quote
Old
  (#6)
coreyfro
Guest
 
Posts: n/a
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 View Post
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.
   
Reply With Quote
Old
  (#7)
pasan
I <3 RC
 
pasan's Avatar
 
Offline
Posts: 157
Join Date: Oct 2008
Location: Colombo, SL | Alpharetta, GA
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?


E-Revo - Mega ACn 22/45/1E MMM 6S
E-Maxx - Feigao 7XL MM 4S
AX10 RTR - Stock :D
Micro-T - Losi LiPo upgrade
Mini LST2 - Discarded. Useless POS.
1/8 Scale Baja Bug - Medusa 36-50-3300 eZrun 60A 3S
   
Reply With Quote
Old
  (#8)
coreyfro
Guest
 
Posts: n/a
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 View Post
I just read up on the XXL 1800... the shaft is 4MM? Where do you find pinions with a 4mm bore?

Last edited by coreyfro; 01.20.2009 at 11:04 AM.
   
Reply With Quote
Old
  (#9)
E-Revonut
RC-Monster RC8T
 
E-Revonut's Avatar
 
Offline
Posts: 2,554
Join Date: Jan 2008
Location: Syracuse, New York (Camillus)
01.20.2009, 01:22 PM

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


RC-Monster RC8T 1515 2.5D/MMM/5s RC-M 4500mah
SC10 MMPro 13.5T 2s NeuEnery 5000mah
RC18T Mamba 25/5400kv 2s lipo + 6s NiMh
   
Reply With Quote
Old
  (#10)
What's_nitro?
Soldermaster Extraordinaire
 
What's_nitro?'s Avatar
 
Offline
Posts: 4,529
Join Date: Apr 2007
Location: Plymouth, MA, USA
01.20.2009, 02:05 PM

@ Coreyfro

Just make sure your wheelie bar is in good working order and you'll be fine. I wouldn't be worried about power until you get into the terawatt range....
   
Reply With Quote
Old
  (#11)
t-maxxracer32
RC-Monster Brushless
 
t-maxxracer32's Avatar
 
Offline
Posts: 2,184
Join Date: Nov 2006
01.20.2009, 02:29 PM

linc can do the lipo separation.
   
Reply With Quote
Old
  (#12)
slimthelineman
RC-Monster Aluminum
 
slimthelineman's Avatar
 
Offline
Posts: 608
Join Date: Jul 2008
Location: IBEW
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.
   
Reply With Quote
Old
  (#13)
1maxdude
Guest
 
Posts: n/a
01.21.2009, 06:56 PM

Gear that bastard up and see what she can do!
   
Reply With Quote
Old
  (#14)
crazyjr
RC-Monster Dual Brushless
 
crazyjr's Avatar
 
Offline
Posts: 3,794
Join Date: May 2005
Location: georgia
01.22.2009, 02:17 AM

Quote:
Originally Posted by coreyfro View Post
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 ,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


Work because i gotta, play because i wanna

People here hate Nitro, I love it. I start it, run it about 50 ft from me and it dies, I go after it. Perfect exercise
   
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump







Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
vBulletin Skin developed by: vBStyles.com