Go Back  R/C Tech Forums > General Forums > Electric Off-Road
ROAR battery rule >

ROAR battery rule

ROAR battery rule

Old 12-01-2015, 02:45 PM
  #1  
Tech Master
Thread Starter
iTrader: (66)
 
BRSracing's Avatar
 
Join Date: Mar 2011
Location: Blue Springs MO
Posts: 1,912
Trader Rating: 66 (100%+)
Default ROAR battery rule

Can someone who knows, not speculate if ROAR changed the battery rule. I was under the impression that 10th scale cars had to be able to use a saddle pack or full size pack to be legal. The new xb4 uses shorty and i have seen nothing to suggest it has a option for a full size or saddle pack. The car does say ROAR legal. Just curious.
BRSracing is offline  
Old 12-01-2015, 05:02 PM
  #2  
Tech Addict
iTrader: (3)
 
Join Date: Oct 2015
Posts: 630
Trader Rating: 3 (100%+)
Default

Well, all of Jared Tebo's setups in both 2wd and 4wd indicate a shorty battery. ROAR rules section 8.7 says battery for 1/10 scale buggy must be 6 cell max or 2s LiPo. So if you need a ROAR approved battery, any 2s configuration with the ROAR approval from the manufacturer should do.

Just re-read and it sounds like you are actually talking about the car being approved... There's nothing stating what batteries a chassis has to be able to accommodate.
Callaway is offline  
Old 12-01-2015, 05:18 PM
  #3  
Tech Elite
iTrader: (12)
 
madweazl's Avatar
 
Join Date: Oct 2002
Location: Fredericksburg, VA
Posts: 2,623
Trader Rating: 12 (100%+)
Default

Originally Posted by Callaway View Post
Well, all of Jared Tebo's setups in both 2wd and 4wd indicate a shorty battery. ROAR rules section 8.7 says battery for 1/10 scale buggy must be 6 cell max or 2s LiPo. So if you need a ROAR approved battery, any 2s configuration with the ROAR approval from the manufacturer should do.

Just re-read and it sounds like you are actually talking about the car being approved... There's nothing stating what batteries a chassis has to be able to accommodate.
Actually, there is.

8.2.3

All chassis in all electric classes (except those specifically noted) MUST accept batteries up to the maximum dimensions allowed for its application. The legality of a chassis will be determined as presented to technical inspection. Chassis that require a configuration change, and/or a modification to fit a battery of maximum dimensions will not be considered legal, and the racer will be disqualified. Foam blocks/spacers are permitted to secure any size battery in its position, but the aforementioned spacers may never be attached to the chassis. The only exception is 1/8 off-road where it’s common to use two battery packs to achieve the maximum 4S configuration, or to use a single 4S battery, which has a different specification. Only under these circumstances will the fitting of either configuration be considered legal, but the production chassis must still conform to batteries of the maximum allowable dimensions.
madweazl is offline  
Old 12-01-2015, 06:53 PM
  #4  
Tech Addict
iTrader: (10)
 
oPAULo's Avatar
 
Join Date: Mar 2015
Location: Bedford, IN
Posts: 577
Trader Rating: 10 (100%+)
Default

I don't think you can fit a full size stick pack in a B5M or a 22 3.0.
oPAULo is offline  
Old 12-01-2015, 07:15 PM
  #5  
Tech Champion
 
Join Date: Oct 2007
Posts: 7,294
Default

Originally Posted by oPAULo View Post
I don't think you can fit a full size stick pack in a B5M or a 22 3.0.
Full size saddle packs count. Believe those will fit. Like many 4x4 buggies.
Dave H is offline  
Old 12-01-2015, 07:23 PM
  #6  
Tech Addict
iTrader: (3)
 
Join Date: Oct 2015
Posts: 630
Trader Rating: 3 (100%+)
Default

Don't you love bureaucratic documents? You have to check every section and try to piece together what it says. So combining 8.2.3 with 8.7, does that mean the chassis needs to be able to accept 6 cell nimh? When was the last time you saw someone run that in their competition buggy?
Callaway is offline  
Old 12-01-2015, 07:29 PM
  #7  
Tech Addict
iTrader: (3)
 
Join Date: Oct 2015
Posts: 630
Trader Rating: 3 (100%+)
Default

http://www.roarracing.com/blog_post.php?pid=2217&ps=0

This blog post elaborates on 8.2.3

Electronics may also be located within the battery area when "shorty" or smaller legal batteries are used, provided that "permanent" mounts for the aforementioned don't preclude the installation of full size battery or saddle pack of maximum dimensions.
Callaway is offline  
Old 12-01-2015, 07:30 PM
  #8  
Tech Adept
 
avaldes's Avatar
 
Join Date: Oct 2015
Posts: 165
Default

I don't think Xray, TLR, Associated, Yokomo or Kyosho would invest millions of dollars tooling up a new car to have it fail tech inspection.
avaldes is offline  
Old 12-01-2015, 07:32 PM
  #9  
Tech Champion
 
Join Date: Oct 2007
Posts: 7,294
Default

Originally Posted by Callaway View Post
Don't you love bureaucratic documents? You have to check every section and try to piece together what it says. So combining 8.2.3 with 8.7, does that mean the chassis needs to be able to accept 6 cell nimh? When was the last time you saw someone run that in their competition buggy?
Well at the risk of answering a rhetorical question: No. The key word is "or". That's a cell limit rule, not a pack size rule. But yeah making rules that develop over time is complicated.
Dave H is offline  
Old 12-01-2015, 07:47 PM
  #10  
Tech Master
Thread Starter
iTrader: (66)
 
BRSracing's Avatar
 
Join Date: Mar 2011
Location: Blue Springs MO
Posts: 1,912
Trader Rating: 66 (100%+)
Default

Originally Posted by oPAULo View Post
I don't think you can fit a full size stick pack in a B5M or a 22 3.0.
they accept a saddle pack, which to my knowledge 10th scale cars had to accept either a saddle or full size pack. They may have updated the rule. I was curious about when i saw the new xray which is roar legal.
BRSracing is offline  
Old 12-13-2015, 11:12 PM
  #11  
Tech Adept
iTrader: (2)
 
Join Date: Jul 2015
Location: Southwest Missouri
Posts: 116
Trader Rating: 2 (100%+)
Default

I believe its just a matter of time till every new chassis is designed around the shorty. Having a smaller size and lighter weight is always going to be a benefit.
racesanything is offline  
Old 12-14-2015, 06:45 AM
  #12  
Tech Champion
 
Mason's Avatar
 
Join Date: Oct 2004
Location: Ocala, Florida
Posts: 5,268
Default

Originally Posted by BRSracing View Post
Can someone who knows, not speculate if ROAR changed the battery rule. I was under the impression that 10th scale cars had to be able to use a saddle pack or full size pack to be legal. The new xb4 uses shorty and i have seen nothing to suggest it has a option for a full size or saddle pack. The car does say ROAR legal. Just curious.
Contact your ROAR Region Director about this.
Mason is offline  
Old 12-14-2015, 06:48 AM
  #13  
Tech Elite
iTrader: (91)
 
dr_hfuhuhurr's Avatar
 
Join Date: Aug 2003
Location: Westchester, NY
Posts: 4,770
Trader Rating: 91 (100%+)
Default

Originally Posted by racesanything View Post
I believe its just a matter of time till every new chassis is designed around the shorty. Having a smaller size and lighter weight is always going to be a benefit.
And with that new design should probably be a modification to the weight limit in the rules. Same as what happened when we switched from SubC to lipo.
dr_hfuhuhurr is offline  
Old 12-14-2015, 07:32 AM
  #14  
Tech Lord
iTrader: (85)
 
Davidka's Avatar
 
Join Date: Oct 2004
Posts: 10,792
Trader Rating: 85 (100%+)
Default

Originally Posted by dr_hfuhuhurr View Post
And with that new design should probably be a modification to the weight limit in the rules. Same as what happened when we switched from SubC to lipo.
Minimum weights have not changed. They are the same as they have always been.
Davidka is offline  
Old 12-15-2015, 11:01 PM
  #15  
Tech Adept
iTrader: (2)
 
Join Date: Jul 2015
Location: Southwest Missouri
Posts: 116
Trader Rating: 2 (100%+)
Default

I dont think there is a need to lighten the weight rules. Sure cars are lighter, much easier than before. But most chassis now are adding weight as tuning. Making them lighter is just going to cause the car have to weight that much less, to be able to add the weight where u want and balance the car out. Power is much greater so weight isnt as important i dont think
racesanything is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.