R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 12-22-2008, 07:41 AM   #1
Tech Master
 
miller tyme's Avatar
 
Join Date: Nov 2007
Location: Indiana
Posts: 1,710
Trader Rating: 2 (100%+)
Default ROAR 1/12 weight limit

To the powers that be:

There are conflict stories on what the weight limit will be for the Carpet Nationals. The rule book, and last time I checked the online rules said 880g. But I've heard this is wrong and I've heard different versions of what it should be.

With Brushless so prominent now, there is a reluctancly to go back to brushed but many of us don't want to give up 3 oz to the brushed cars. Most brushless only venues have adopted the 865g limit. Either way I, and many others would like an official call on what to expect at the Nationals so I can either countine brushless or revert back to brushed.
__________________
Ken Miller
RCTarget - Capricorn - Pro Level RC - MAX Power - Maxima Fuel - EA Motorsorts - TQ Wire

LONG LIVE OPEN MODIFIED
miller tyme is offline   Reply With Quote
Old 12-22-2008, 08:20 AM   #2
Tech Elite
 
Slapmaster6000's Avatar
 
Join Date: Sep 2004
Location: Edmonds, Wash.
Posts: 3,049
Trader Rating: 16 (100%+)
Default

I asked Rueben if the 880g is the reoccurring typo and he said it was. We have to assume that 794g is still in play until we hear otherwise. Unless you see a "deviation" on the entry flyer or on the announcement, plan on going skinny.
Slapmaster6000 is offline   Reply With Quote
Old 12-22-2008, 08:34 AM   #3
Tech Champion
 
Join Date: Jan 2004
Location: Rockville, MD
Posts: 5,058
Trader Rating: 4 (100%+)
Default

My GenX is 920. I might be able to cut some off to get closer to 880. Can't even get close to 794.
__________________
Steve Walter
Sweep Racing USA/ Speed Passion USA/ Karens Famous Cookies (Transporter)
SRW141 is offline   Reply With Quote
Old 12-22-2008, 08:46 AM   #4
Tech Champion
 
Join Date: Oct 2004
Location: Long Island, NY
Posts: 7,211
Trader Rating: 2 (100%+)
Default

I believe this question came up last year, and was corrected in a post but not in the rules. The minimum weight for 1/12 4 cell is 794 grams.

However if you are using a brushless motor you cannot come close to this weight. At the Region 1 carpet race most cars were over 850, with one even over 900!

The ROAR Technical committee will have to look at raising the min weight for 1/12 to accomodate brushless motors, but I think someone has to ask first.
jiml is offline   Reply With Quote
Old 12-22-2008, 08:46 AM   #5
Tech Master
 
1fastdude's Avatar
 
Join Date: Apr 2002
Location: Sinsinnati
Posts: 1,938
Trader Rating: 15 (100%+)
Default

794 gm. was for brushed motors, there is "almost" no possible way of getting a 1/12 scale brushless down to that weight!
__________________
★RCAmerica •Xray •Hudy •BSR •Absolute Hobbyz •Gravity RC •PROTOform •Avid •TQ Racing Wire •C & M Motorsports ★
1fastdude is offline   Reply With Quote
Old 12-22-2008, 08:59 AM   #6
Tech Elite
 
Slapmaster6000's Avatar
 
Join Date: Sep 2004
Location: Edmonds, Wash.
Posts: 3,049
Trader Rating: 16 (100%+)
Default

My MS3's run about 825-835g depending on front ends used. I know it's one of the leanest cars around. I have run against many others in the 875 range. You would think that you could see a clear difference. Not sure it's as big of an advantage we think, but I know that I am not willing to give it up!

We're snowed in on the west coast..... gonna be an rctech kinda day.
Slapmaster6000 is offline   Reply With Quote
Old 12-22-2008, 09:12 AM   #7
Tech Addict
 
Join Date: Mar 2003
Posts: 645
Trader Rating: 1 (100%+)
Default

865 is the norm.. Hopefully Roar will go with this also.. :-)



Mike
__________________
TEAM ASSOCIATED, SMC BATTERIES, REEDY MOTORS, JACO TIRES, RADIOPOST RADIOS, LRP ELECTRONICS, PROTOFORM BODIES, MAKITA POWER TOOLS, KICKER PEFORMANCE AUDIO, KOLORS BY KROPY, MUCH-, RSD
Mike Blackstock is offline   Reply With Quote
Old 12-22-2008, 09:40 AM   #8
Tech Champion
 
skypilot's Avatar
 
Join Date: Mar 2007
Posts: 9,524
Trader Rating: 14 (100%+)
Default

Quote:
Originally Posted by Slapmaster6000 View Post

We're snowed in on the west coast..... gonna be an rctech kinda day.

stop being a wussie, let your inner drifter out..
__________________
semi retired..
skypilot is offline   Reply With Quote
Old 12-22-2008, 09:51 AM   #9
Tech Elite
 
Join Date: Feb 2004
Location: Chandler, Arizona
Posts: 3,273
Send a message via AIM to Dawn Sanchez
Default

There is a never ending typo on that one dimension.... every year its corrected in the online version of the rule book but never makes it to print.

The book will reflect 795g. Online version is now reflecting 795g.


But.. Blackstock just threw a wierd dimension at me... where is that normal Mike and when has ROAR ever run that? I'll do the research if you just direct the way.
Dawn Sanchez is offline   Reply With Quote
Old 12-22-2008, 10:10 AM   #10
Tech Master
 
BBSpence's Avatar
 
Join Date: Feb 2002
Location: Northern VA
Posts: 1,731
Trader Rating: 45 (100%+)
Default

865g is the IFMAR rule. http://www.ifmar.org/pdf/ifmar_wc_el...track_2008.pdf
BBSpence is offline   Reply With Quote
Old 12-22-2008, 10:12 AM   #11
Tech Champion
 
Join Date: Oct 2004
Location: Long Island, NY
Posts: 7,211
Trader Rating: 2 (100%+)
Default

865 grams is the IFMAR minimum. This takes into account the heavier brushless motors. ROAR has never run this weight. The 880g weight is for 6 cell 1/12 scale.

And if you think that's weird wait until we start asking for single cell LiPo for 1/12!
jiml is offline   Reply With Quote
Old 12-22-2008, 10:16 AM   #12
Ike
Tech Master
 
Ike's Avatar
 
Join Date: Jan 2004
Posts: 1,131
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Dawn Sanchez View Post
There is a never ending typo on that one dimension.... every year its corrected in the online version of the rule book but never makes it to print.

The book will reflect 795g. Online version is now reflecting 795g.


But.. Blackstock just threw a wierd dimension at me... where is that normal Mike and when has ROAR ever run that? I'll do the research if you just direct the way.
IFMAR uses 865, which is more practical for brushless applications. I'd really like to see 1 cell lipo make its way into 1/'12th scale racing (nudge nudge ). With lipo, the smaller lighter ESC's coming out, and the lighter brushless motors, I think if the weight is changed it should be done with the realization that it's probably going to have to be revisited quickly. That is assuming that ROAR at some point approves 1 cell lipo for racing.
Ike is offline   Reply With Quote
Old 12-22-2008, 10:32 AM   #13
Tech Elite
 
Join Date: Feb 2004
Location: Chandler, Arizona
Posts: 3,273
Send a message via AIM to Dawn Sanchez
Default

Quote:
Originally Posted by Ike View Post
IFMAR uses 865, which is more practical for brushless applications. I'd really like to see 1 cell lipo make its way into 1/'12th scale racing (nudge nudge ). With lipo, the smaller lighter ESC's coming out, and the lighter brushless motors, I think if the weight is changed it should be done with the realization that it's probably going to have to be revisited quickly. That is assuming that ROAR at some point approves 1 cell lipo for racing.
Single cell lipo is a VERY real happening currently in ROAR. We have requested submission of packs from MFG's to our lab for conditional approvals (so we may gather info to determine specs).... but for 2009, we will allow single cell lipo.... IF THE MFG'S ACTUALLY SEND SOMETHING TO ROAR FOR EVAULATION.
Dawn Sanchez is offline   Reply With Quote
Old 12-22-2008, 10:47 AM   #14
Ike
Tech Master
 
Ike's Avatar
 
Join Date: Jan 2004
Posts: 1,131
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Dawn Sanchez View Post
Single cell lipo is a VERY real happening currently in ROAR. We have requested submission of packs from MFG's to our lab for conditional approvals (so we may gather info to determine specs).... but for 2009, we will allow single cell lipo.... IF THE MFG'S ACTUALLY SEND SOMETHING TO ROAR FOR EVAULATION.
That's great to hear Dawn! From all the testing that has been done thus far it really seems that a 13.5/lipo is very very close to equal to a 17.5/4 cell. You guys need to be careful about pack sizes as well since larger packs than what Danny is doing over at SMC might require messing with parts (mainly the center shock) of the car to get them to fit.
Ike is offline   Reply With Quote
Old 12-22-2008, 10:59 AM   #15
Tech Master
 
miller tyme's Avatar
 
Join Date: Nov 2007
Location: Indiana
Posts: 1,710
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by jiml View Post
...The ROAR Technical committee will have to look at raising the min weight for 1/12 to accomodate brushless motors, but I think someone has to ask first.
Quote:
Originally Posted by BBSpence View Post
Well ROAR, I'm asking! Obviously with the phasing out of 19t and going 13.5 only your heading for brushless only, might as well be consistent with the rest of the brushless world and just make the 1/12 weight 865g brushed or brushless, that should truly level the field for 17.5.
__________________
Ken Miller
RCTarget - Capricorn - Pro Level RC - MAX Power - Maxima Fuel - EA Motorsorts - TQ Wire

LONG LIVE OPEN MODIFIED
miller tyme is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
‘FWR Racing Season’ FWR Northwest Racers 11302 08-23-2015 07:38 PM
2009 Blue Diamond/G Force on road scene "ALL OUT"!! spurcheck Racing Forum 1993 01-25-2010 03:25 PM
Backwards Lipo use: Time to evolve Peoples. oXYnary Electric On-Road 50 07-27-2008 01:28 PM
2007 Battle @ The Bowl - Mushroombowl Speedway - Kennett Square, PA A. Rhodes Racing Forum 383 06-09-2008 08:04 PM
Deal of the year..... DLM2005 R/C Items: For Sale/Trade 10 06-30-2006 10:57 AM
2005 Mid-Winter Touring Car Challenge FIVE 7 Canadian R/C Scene 79 02-28-2005 11:50 PM



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

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:32 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net