MagLev C [Trial]

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MagLev C [Trial]

Postby Jim_R » August 29th, 2011, 7:48 am

Discussion for Magnetic Levitation C.

viewtopic.php?f=91&t=2278
http://newyorkscioly.org/SOPages/MagLevC12.pdf

It is a trial event in New York.
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Re: MagLev C [Trial]

Postby illusionist » September 10th, 2011, 6:32 pm

So, this will be an official event in Division C next year, right?
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Re: MagLev C [Trial]

Postby chalker » September 10th, 2011, 6:52 pm

illusionist wrote:So, this will be an official event in Division C next year, right?


That is the current plan, subject to change of course;)

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Re: MagLev C [Trial]

Postby twototwenty » September 11th, 2011, 5:26 pm

Does anyone have any ideas on how to make the cars width adjustable, other than tape?

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Re: MagLev C [Trial]

Postby butter side up » September 12th, 2011, 7:39 pm

twototwenty wrote:Does anyone have any ideas on how to make the cars width adjustable, other than tape?

The width of the track is supposed to be standardized, so that shouldn't be much of an issue in theory. In practice, we had the main body of the vehicle (with motors, and the bulk of it) stay solid, and built a few different sleds that attached to the body with Velcro. The sleds were thin pieces of wood of varying width with the magnets screwed onto the bottom of them. We made these sleds all just a little under and a little over standard track size. (Actually this was originally unintentional- we had built several sleds in an attempt to find the best width.)
Another thing that can be done is attaching thin strips of excess foam (the stiff, dense, blue kind) to the sides if you need to add a significant (or small) amount fast. if all else fails, throw a file/ sandpaper and a hot glue gun in your tool box and modify it on the fly when you get there. They would probably let you check the width against your sled at impound.
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Re: MagLev C [Trial]

Postby chalker » September 13th, 2011, 5:03 am

butter side up wrote:The width of the track is supposed to be standardized, so that shouldn't be much of an issue in theory.


Yes, in theory. But in practice there is variability, which is why we introduced this aspect into the rules. We want to make sure you don't show up at the competition and find that your vehicle gets stuck, which happened to far too many people last year.

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Re: MagLev C [Trial]

Postby Primate » September 24th, 2011, 8:14 am

A lightweight adjustable-width sled would be really cool.

(But even that wouldn't help with the mismade tracks that get narrower as you approach the finish line >.>)
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Re: MagLev C [Trial]

Postby twototwenty » October 1st, 2011, 1:54 pm

Primate wrote:A lightweight adjustable-width sled would be really cool.

(But even that wouldn't help with the mismade tracks that get narrower as you approach the finish line >.>)


Was that type of track really a problem?

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Re: MagLev C [Trial]

Postby Primate » October 1st, 2011, 2:21 pm

twototwenty wrote:
Primate wrote:A lightweight adjustable-width sled would be really cool.

(But even that wouldn't help with the mismade tracks that get narrower as you approach the finish line >.>)


Was that type of track really a problem?

At regionals, yes.

By the state competition, they finally wised up and got two separate tracks (probably the Pitsco and the Kelvin) so you could choose the one that worked best for your vehicle.
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Re: MagLev C [Trial]

Postby Flavorflav » October 4th, 2011, 10:02 am

Primate wrote:
twototwenty wrote:
Primate wrote:A lightweight adjustable-width sled would be really cool.

(But even that wouldn't help with the mismade tracks that get narrower as you approach the finish line >.>)


Was that type of track really a problem?

At regionals, yes.

By the state competition, they finally wised up and got two separate tracks (probably the Pitsco and the Kelvin) so you could choose the one that worked best for your vehicle.

I believe the Pitsco tracks are not the same dimensions. They are wider, I think, and have higher side rails. All of the other suppliers except Kelvin sell a track with acrylic side rails which fit into channels in the base, and which seem to show quite a bit of variability.

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Re: MagLev C [Trial]

Postby smartkid222 » October 8th, 2011, 5:39 pm

Does anyone have any idea of what the test section will be like? Do you think that they be very heavy on equations and calculations like the Geometric Optics section of Optics or perhaps more content based?
I imagine the test to contain both but probably quite a bit more content based than optics. This is because the first few bullets are about magnetism generally speaking which includes mostly calculations (like a normal physics class) but the last few bullets seem more knowledge based (common uses of magnets, for example).
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Re: MagLev C [Trial]

Postby chalker » October 8th, 2011, 6:07 pm

smartkid222 wrote:Does anyone have any idea of what the test section will be like? Do you think that they be very heavy on equations and calculations like the Geometric Optics section of Optics or perhaps more content based?
I imagine the test to contain both but probably quite a bit more content based than optics. This is because the first few bullets are about magnetism generally speaking which includes mostly calculations (like a normal physics class) but the last few bullets seem more knowledge based (common uses of magnets, for example).



I'll give you the same answer here I did in Optics: There is really no way to answer questions like these. There are hundreds of tournaments around the country, all run by different event supervisors. There isn't some secret 'event supervisor manual' that tells them how to make the tests... they see the same rules as you do. Thus it's totally dependent on the specific supervisor you have as to what the test will be like.

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Re: MagLev C [Trial]

Postby twototwenty » October 14th, 2011, 8:58 am

Last year, the entire test was very simple, even at states level. At invitationals, the test that I took could have been easily done with nothing more than common sense based on a basic understanding of magnets. For regionals, it was mostly the same, and the most challenging problem was an interessting logic problem, which required more on-the-spot thinking than actual intensive knowledge of magnets. For all of the tests, the resources my partner and I brought along were not used.

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Re: MagLev C [Trial]

Postby twototwenty » December 2nd, 2011, 6:04 am

Sorry to double post, but I noticed something of a contradiction in the rules:
It first is stated that we should try to make our vehicle's width adjustable, but it later says that we cannot design our vehicle to intentionally touch any part of the track. By being able to have our vehicle's width adjust to properly fit the track, wouldn't it need to touch the sides of the track, intentionally?

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Re: MagLev C [Trial]

Postby chalker » December 2nd, 2011, 9:03 pm

twototwenty wrote:Sorry to double post, but I noticed something of a contradiction in the rules:
It first is stated that we should try to make our vehicle's width adjustable, but it later says that we cannot design our vehicle to intentionally touch any part of the track. By being able to have our vehicle's width adjust to properly fit the track, wouldn't it need to touch the sides of the track, intentionally?


No. That's the whole purpose of the adjustability, to be able to adjust it so it DOESN'T touch the track. There are actually 2 common issues we've seen: 1. The vehicle is slightly too wide, meaning it gets 'jammed' into the track and can't move. 2. The vehicle is way too narrow, resulting in it moving a bit then getting jammed at a diagonal on the track somehow because it twisted itself. You definitely don't want the vehicle touching the track because you lose speed due to friction that way. Another reason for the 2nd rule you pointed out is to ensure people don't design wheeled vehicles.

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