10-02-2008 17:13

dtengineering

Re: pic: Can you say cheese?

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

10-02-2008 17:15

EricH

Re: pic: Can you say cheese?

I'd say about 69 holes in the drive frame, not counting the back rail and anything inside...

10-02-2008 17:24

AdmiralAllen

Re: pic: Can you say cheese?

well if your using 1/8" aluminum it would take 419 1/2" holes to lose 3 pounds

10-02-2008 17:37

jgannon

Re: pic: Can you say cheese?

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

10-02-2008 18:47

falconmaster

Re: pic: Can you say cheese?

How much weight would it be since it is pultruded fiberglass? This question ought to slow you down a bit.

10-02-2008 18:49

falconmaster

Re: pic: Can you say cheese?

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?

10-02-2008 21:05

MrForbes

Re: pic: Can you say cheese?

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!