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potatoarecool 16-01-2008 20:18

Chassis weight
 
Hey guys, I was wondering how heavy a robot would be if it was only made of parts from the kit, with nothing but the electronics, 2 motors, wheels and battery. Did anyone check for this? Thanks.

wilsonmw04 16-01-2008 20:26

Re: Chassis weight
 
We did that, sort of. We used a 6-WD with two sets of chains on each side. Without the battery it weighted ~47 lbs. With just the parts in the KOP i bet it's closer to 40 lbs.

wilsonmw04 16-01-2008 23:27

Re: Chassis weight
 
Quote:

Originally Posted by Zyik (Post 679685)
Ours is 13 pounds

I find that hard to believe when the frame itself is 17 lbs if you use every piece. heck the Transmissions + CIM's are close to 6 lbs each.

Otaku 16-01-2008 23:30

Re: Chassis weight
 
Our chassis (non-kitbot, fully custom) with no transmissions or anything is 17lbs. With transmissions and two CIMs total it feels much closer to 35lbs.

AndyB 17-01-2008 09:44

Re: Chassis weight
 
We weighed ours with a chassis, 4 wheels, 2 sprockets, 2 gearboxes, and no electronics and it came out around 26 lbs. No battery, only 2 cims. So factor in battery weight and whatever the weight of the electronics panel would be and it probably will run up to around 45 lbs.

Clifford 17-01-2008 10:35

Re: Chassis weight
 
If you're thinking about what your robot will weigh fully built, remember that the weight of the battery is not included in your total weight at inspection.

beemgruem 17-01-2008 10:40

Re: Chassis weight
 
Ours is with battery, electronics board, 2 normal 2 small wheels, 2 gearboxes, I don't remember the sprockets. It is 46 Ibs.

Aren_Hill 17-01-2008 10:46

Re: Chassis weight
 
We finished our frame yesterday at 11.5 lbs

sdcantrell56 17-01-2008 11:10

Re: Chassis weight
 
Our completely finished uber beefy drivetrain with motors and electronics is right around 50lbs

midway78224 17-01-2008 13:36

Re: Chassis weight
 
our drivetrain when we finish it was at 55 lbs that was with electronics, supershifters, six wheels, etc....

Madison 17-01-2008 13:44

Re: Chassis weight
 
Our frame is 10.75 lbs.

The complete, operational drive train, save 12V battery, is 35 lbs.

sdcantrell56 17-01-2008 13:50

Re: Chassis weight
 
How and why do some teams make the drivetrain so light? It would seem that it would hurt the CG a lot.

Madison 17-01-2008 13:55

Re: Chassis weight
 
Quote:

Originally Posted by sdcantrell56 (Post 680115)
How and why do some teams make the drivetrain so light? It would seem that it would hurt the CG a lot.

We make everything as light as possible. Adding weight later is much easier than taking it off. In the ten years that I've been with FIRST, I've had a robot tip over twice.

sdcantrell56 17-01-2008 14:06

Re: Chassis weight
 
Don't get me wrong I really love your frames although they are a little thin for my liking...I just think that sometimes people worry about weight in the drivetrain a little too much since that is the best place for the weight.

Molten 17-01-2008 14:07

Re: Chassis weight
 
In the two years that I've been in FIRST, our robot has tipped over three times. (We played a lot of defense last year.) But MKrass is right, adding weight is really easy, I wish losing weight was the same.


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