R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-04-2008, 09:45 PM   #1
Tech Fanatic
 
trailranger's Avatar
 
Join Date: Feb 2007
Location: Springfield, MO
Posts: 946
Default Should Sedan Min weight Be Lowered?

I have been thinking about this for a while and I want to know what others think.

Should the the min weight be lowered? If so how much? 100grams? 150grams? more?


Lowering the min weight will help the transistion from NiMH to LiPO happen faster without making a LiPO only rule.
The lower weight will increase the durablilty of the cars.
The lower weight will help keep the outrageous large capacity LiPO's from being used. 3200mah should be enough for a 5min race.
trailranger is offline   Reply With Quote
Old 04-04-2008, 09:47 PM   #2
Tech Addict
 
more$thanbrains's Avatar
 
Join Date: Aug 2006
Location: Sooke BC Canada
Posts: 677
Send a message via MSN to more$thanbrains
Default

i agree with your points but lowering the weight will make it unfair to those who choose to continue to run NIMH
__________________
Xray~Titan~Ko Propo~Orion~Muchmore~Dekelz.com
T2 007 US/EU~CRC Gen-XL~MO3-Pro~NT1~Corally C10X
'73 Ford Bronco sittin on 36" swampers~ 10" lift
more$thanbrains is offline   Reply With Quote
Old 04-04-2008, 09:49 PM   #3
Tech Elite
 
Francis M.'s Avatar
 
Join Date: Apr 2002
Location: Yorba Linda, CA
Posts: 4,719
Trader Rating: 2 (100%+)
Default

I agree with lowering the weight, How much I don't know but I know. I disagree with limiting the lipo capacity to 3200 though... You'll pretty much kill mod for good.
__________________
TQ-racing Yokomo BD7 Airtronics
Francis M. is offline   Reply With Quote
Old 04-04-2008, 09:50 PM   #4
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

I think for 2009 we need to make the rules for just lipo at lighter weights.

There is no disadvantage for any cars as all you have to do is scoot your lipo over ~3mm to balance the car with the lighter battery...no muss no fuss.

I run 5000mah Core packs. I run 10.5 and Mod so I have no interest in smaller packs
__________________
Adrian Martinez
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series
AdrianM is offline   Reply With Quote
Old 04-04-2008, 10:03 PM   #5
Tech Champion
 
snoopyrc's Avatar
 
Join Date: Oct 2006
Location: Tunnel Hill GA
Posts: 5,046
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by AdrianM View Post
There is no disadvantage for any cars as all you have to do is scoot your lipo over ~3mm to balance the car with the lighter battery...no muss no fuss.
Is that true? is that all you have to do to balance? It seems like it would take more than that.
__________________
www.battlefieldraceway.com Racing videos at http://www.youtube.com/snoopyrc
snoopyrc is offline   Reply With Quote
Old 04-04-2008, 11:03 PM   #6
Tech Addict
 
Join Date: Nov 2007
Location: Colorado
Posts: 627
Trader Rating: 6 (100%+)
Send a message via Skype™ to revolution31
Default

I think the minimum weight should be lowered for TC (carpet and asphalt).

It simply makes things easier. I haven't personally balanced a TC for LiPo yet...but I have seen a lot of guys making all of these crazy custom milled weights and buying special weights that stick on to each of their batteries (not necessarily to balance the car I guess, but just to reach min weight). As someone else said...I know that lowering the weight would kind of isolate the guys still running NiMHs ... but I think that, like switching from NiCd to NiMH, switching from NiMH to LiPo will be a positive direction for the hobby.

However, I as well don't think there should be a limit on the LiPos....I guess the main reason I think this is that if things like mAh rating start getting restricted in races, then I think we are also somewhat indirectly restricting the ability of the hobby to grow, racing or otherwise.
revolution31 is offline   Reply With Quote
Old 04-04-2008, 11:17 PM   #7
Tech Champion
 
Join Date: Jun 2004
Location: St Louis
Posts: 7,868
Trader Rating: 198 (100%+)
Default

Leave the weight where it is at. Until only lipo packs are available then maybe the weight should be changed. To balance the car from side to side you still need to add weight. That is if the electronics and motor are on the other side.

Also lower weight means it will be harder to lock into a setup for a car on a given track. This is especially true of offroad.
__________________
Please become an organ donor.
www.donatelife.net
Custom decals and Sno-Tee'z, T-Shirts by Sno Camel
dodgeguy is offline   Reply With Quote
Old 04-05-2008, 12:52 AM   #8
Tech Elite
 
Join Date: Jun 2005
Posts: 2,570
Trader Rating: 26 (96%+)
Default

I believe that the weight should be lowered to 1100 grams. An 1100 gram car w/ a 19 turn motor will go toe to toe w/ a 1450 gram car w/ a gtb 3.5. Simply put
-5 gp 3300s only weighs about 280 grams.
-3/4ths less stress on parts
-3/4ths the energy needed to go
-tcs will still drive around a track w/ a bad setup, & if less weight will make setups harder to come up with then it should help to make setups knowledge more important.
-lower discharge batteries needed
party_wagon is offline   Reply With Quote
Old 04-05-2008, 01:52 AM   #9
Tech Elite
 
Racing4Evo's Avatar
 
Join Date: Sep 2002
Location: SoCal
Posts: 2,118
Trader Rating: 2 (100%+)
Send a message via AIM to Racing4Evo
Default

Quote:
Originally Posted by party_wagon View Post
I believe that the weight should be lowered to 1100 grams. An 1100 gram car w/ a 19 turn motor will go toe to toe w/ a 1450 gram car w/ a gtb 3.5. Simply put
-5 gp 3300s only weighs about 280 grams.
-3/4ths less stress on parts
-3/4ths the energy needed to go
-tcs will still drive around a track w/ a bad setup, & if less weight will make setups harder to come up with then it should help to make setups knowledge more important.
-lower discharge batteries needed
I think 1100 grams is too light. That would make every car overweight out of the box. What is the point in making a 19 turn as fast as mod? You'll just have people breaking more parts. There is just as much force on the car if a lighter car is going faster than a slower and heavier car(mass*acceleration).


In my opinion I think the weight should be lowered maybe 100 grams? That would be easy for everyone and should make racing a bit more exciting.
Racing4Evo is offline   Reply With Quote
Old 04-05-2008, 02:12 AM   #10
Tech Elite
 
CristianTabush's Avatar
 
Join Date: Oct 2002
Location: Houston
Posts: 2,839
Trader Rating: 11 (100%+)
Default

Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Eye on the wording about force, as noted above, it is not weigh, rather than Mass that is the true "weight of an item." Weight is relative to the amount of gravitational force pulling down on an item. An object with the same mass for example, weights less on the moon that it does on earth even though it still has the same amount of mass.

Therefore, the heavier the car, the more mass it has, the more force there is on an impact...
__________________
REFLEX RACING/ RSD/ GIZMO RACING USA/ HOBBYWING/ AXON/ QTEQ/ TEAM PRIME
CristianTabush is offline   Reply With Quote
Old 04-05-2008, 08:30 AM   #11
Tech Champion
 
Join Date: Oct 2004
Location: Long Island, NY
Posts: 7,211
Trader Rating: 2 (100%+)
Default

Personally I think everyone on this site isn't balanced, that is we're all a little off!

Minimum weight should stay the same until the new lipo specific designed cars come out. And saddle packs suck!
jiml is offline   Reply With Quote
Old 04-05-2008, 08:35 AM   #12
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,999
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by jiml View Post
Personally I think everyone on this site isn't balanced, that is we're all a little off!

Minimum weight should stay the same until the new lipo specific designed cars come out. And saddle packs suck!
The way I look at it is.....they lowered the weight for 5 cell racing so why not lower it for Lipo? Some chassis don't have the room to add all the weight needed to bring it to roar specs.
STLNLST is offline   Reply With Quote
Old 04-05-2008, 08:40 AM   #13
Tech Master
 
smoke81's Avatar
 
Join Date: May 2003
Location: Kansas City
Posts: 1,224
Send a message via AIM to smoke81 Send a message via Yahoo to smoke81
Default

Quote:
Originally Posted by STLNLST View Post
The way I look at it is.....they lowered the weight for 5 cell racing so why not lower it for Lipo? Some chassis don't have the room to add all the weight needed to bring it to roar specs.
Then run NIMH??? I don't think you can compare 5 cell to lipo here...
__________________
Dustin Layne
smoke81 is offline   Reply With Quote
Old 04-05-2008, 09:19 AM   #14
Tech Champion
 
Join Date: Oct 2004
Location: Long Island, NY
Posts: 7,211
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by STLNLST View Post
The way I look at it is.....they lowered the weight for 5 cell racing so why not lower it for Lipo? Some chassis don't have the room to add all the weight needed to bring it to roar specs.
Because 5 cell also reduces the power. Lipo's are lighter but have the same voltage as a 6 cell NiMh.
jiml is offline   Reply With Quote
Old 04-05-2008, 10:33 AM   #15
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by snoopyrc View Post
Is that true? is that all you have to do to balance? It seems like it would take more than that.
Yup its true, 3-6mm depending on the car and your electronics. On my Mi3 my car balances with no weight if my Core 5000 Lipo hangs off the chassis 3mm.
__________________
Adrian Martinez
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series
AdrianM is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sedan Bodies, Rules, Weight, Lexan Thickness etc. daleepp Electric On-Road 17 12-19-2013 06:15 AM
For Sale, NIP Xray sedan parts, something for almost every sedan they produced. Kraig R/C Items: For Sale/Trade 18 03-16-2009 08:04 PM
Lipo Weight addition to balance your Sedan dgullickson Commercial Marketplace 1 11-28-2008 08:46 AM
Weight distribution on touring sedan OscarF1 Electric On-Road 11 05-01-2007 02:02 PM
IRS Lowered Pod PLates JJ187RC R/C Items: For Sale/Trade 8 11-12-2004 09:35 AM



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 10:29 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net