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falconmaster
02-10-2008, 05:09 PM
[cdm-description=photo]30182[/cdm-description]

dtengineering
02-10-2008, 05:13 PM
Oh... I thought the blue tint was some kind of pun on the concept of blue cheese....

But the robot looks great. We've been enjoying your videos and photos as you've been building. I'm surprised that you had a weight issue, as it didn't look that heavy.

Jason

EricH
02-10-2008, 05:15 PM
I'd say about 69 holes in the drive frame, not counting the back rail and anything inside...

02-10-2008, 05:24 PM
well if your using 1/8" aluminum it would take 419 1/2" holes to lose 3 pounds

jgannon
02-10-2008, 05:37 PM
well if your using 1/8" aluminum it would take 419 1/2" holes to lose 3 pounds
How do you figure? I'm calculating 416 holes to one pound.

Volume of a hole: pi * r^2 * h = pi * (1/4)^2 * 1/8 = 0.0245436926 in^3
Density of aluminum: 0.098lb/in^3
Weight of a hole = volume * density = 0.00240528187 lb
Holes per pound = 1 / weight = 415.75 holes

falconmaster
02-10-2008, 06:47 PM
How much weight would it be since it is pultruded fiberglass? This question ought to slow you down a bit.

falconmaster
02-10-2008, 06:49 PM
Oh... I thought the blue tint was some kind of pun on the concept of blue cheese....

But the robot looks great. We've been enjoying your videos and photos as you've been building. I'm surprised that you had a weight issue, as it didn't look that heavy.

Jason

We were guessing it was 120, and it was. We want some lee way, just in case. thanks for the kind words, we too have been watching your season thus far and look forward to seeing you in AZ, you are coming right?

MrForbes
02-10-2008, 09:05 PM
The fiberglass weighs about 0.06 lbs/in^3, and it's 1/4" thick on the chassis parts....that's a lot of weight drilled out!

We're sitting around 110 or less so we didn't get to make any lightening holes this year. Quite a change from our rookie robot!