Search found 1678 matches

by illusionist
October 19th, 2012, 3:48 pm
Forum: 2013 Build Events
Topic: Robot Arm C
Replies: 425
Views: 44031

Re: Robot Arm C

Use this and get the best of both worlds!
http://www.mechatronictips.com/2010/11/ ... d-balloon/
by illusionist
October 12th, 2012, 1:09 pm
Forum: 2013 Build Events
Topic: MagLev C
Replies: 528
Views: 52021

Re: MagLev C

That was actually part of my question, though - with regard to placement of magnets, there does not seem to be anything in the rules which requires us to conform to the "standard" maglev track. Now that the cat is out of the bag, I will make that part more explicit: are we permitted to place magnet...
by illusionist
October 11th, 2012, 12:15 pm
Forum: 2013 Build Events
Topic: MagLev C
Replies: 528
Views: 52021

Re: MagLev C

Looking through the rules, I see no restrictions on the type or placement of magnets on the track. Given general rule 2, this should mean that we can use any kind of magnets (including rare earth) in any configuration we desire. Does anyone disagree with that interpretation? Actually, rule 3.k says...
by illusionist
October 11th, 2012, 12:11 pm
Forum: 2013 Build Events
Topic: Gravity Vehicle C
Replies: 426
Views: 48508

Re: Gravity Vehicle C

Balsa Man, when you said the sliding mass produced faster times, you were comparing it with a fixed-in-the-center mass, right? It should not improve your time over a low fixed-in-the-rear mass, so the benefit you are getting over the latter is really in accuracy rather than speed, is it not? Yup, t...
by illusionist
October 11th, 2012, 5:19 am
Forum: 2013 Build Events
Topic: Gravity Vehicle C
Replies: 426
Views: 48508

Re: Gravity Vehicle C

Balsa Man, when you said the sliding mass produced faster times, you were comparing it with a fixed-in-the-center mass, right? It should not improve your time over a low fixed-in-the-rear mass, so the benefit you are getting over the latter is really in accuracy rather than speed, is it not? Yup, t...
by illusionist
October 10th, 2012, 7:01 pm
Forum: 2013 Build Events
Topic: Gravity Vehicle C
Replies: 426
Views: 48508

Re: Gravity Vehicle C

Just came from there. I did not know that this site existed last year, so when I found it this year, I looked at a couple of pages of last year and did not find much of value. I got back to pg 45 and there was a lot of useful information. I watched a lot of the nationals as an interested visitor an...
by illusionist
October 10th, 2012, 5:27 pm
Forum: 2013 Build Events
Topic: Elastic Launched Glider C
Replies: 454
Views: 73204

Re: Elastic Launched Glider C

A cool video showing a Science Olympiad ELG launch: http://www.youtube.com/watch?v=Mp5YCny0 ... re=related
by illusionist
October 10th, 2012, 5:23 pm
Forum: 2013 Build Events
Topic: Gravity Vehicle C
Replies: 426
Views: 48508

Re: Gravity Vehicle C

With all due respect, I'm first going to say is what I get to say many times each year when a new kid pops up 15 pages of discussion into an event, and says, "so folk, how do I make a good one of __ fill in the blank___?" Go back and read- that's one of the great values of this forum- the accumulat...
by illusionist
October 10th, 2012, 12:17 pm
Forum: 2013 Build Events
Topic: Gravity Vehicle C
Replies: 426
Views: 48508

Re: Gravity Vehicle C

Balsa Man, earlier you said your team used the sliding-mass mechanism to get the best of both worlds by having the mass start as high as possible and yet end up in the middle of the vehicle for traction during the run. Will the "kick" that you get out of the mass hitting the vehicle upon launch give...
by illusionist
October 5th, 2012, 6:07 pm
Forum: 2013 Build Events
Topic: Gravity Vehicle C
Replies: 426
Views: 48508

Re: Gravity Vehicle C

While the rules certainly are an improvement from last year (especially the "leftmost face" part), the one thing that I still wish they had was a limitation as to what type of pencil could be used- hexagonal v. circular. In my own system, it'd be easier to use a round pencil, though a hexagonal one ...

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