Mousetrap Vehicle C

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Mousetrap Vehicle C

Postby windu34 » June 30th, 2018, 9:50 am

Mousetrap Vehicle C: Teams design, build and test a vehicle using one or two snap mousetraps as its sole means of propulsion to push a paper cup forward, reverse direction, and stop as close as possible to a target point.

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Re: Mousetrap Vehicle C

Postby Things2do » September 3rd, 2018, 8:35 pm

The Rules are harsh difficult strenuous strange this year.
That second trap might be too much power for the track.
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Re: Mousetrap Vehicle C

Postby nicholasmaurer » September 3rd, 2018, 8:36 pm

Anyone care to comment on whether the 3oz cup rule (5.c.) refers to weight or volume? I would assume volume - but it seems like a pretty glaring ambiguity to me...
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Re: Mousetrap Vehicle C

Postby nicholasmaurer » September 3rd, 2018, 8:57 pm

Additionally, 5.b and 5.i. read together seem to imply that a vehicle that is ready to run at 7:59 would be allowed to complete said run, but that it would be marked as a failed run if it took longer than the remaining second. This would be a notable change from past years, although it may be unintentional...
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Re: Mousetrap Vehicle C

Postby antoine_ego » September 4th, 2018, 4:53 am

nicholasmaurer wrote:Anyone care to comment on whether the 3oz cup rule (5.c.) refers to weight or volume? I would assume volume - but it seems like a pretty glaring ambiguity to me...


I'm pretty sure it means volume, since 3 oz is 85 g, which would be unreasonably heavy for a paper cup.

There's some ambiguity in the placement of the VTP. It states that the VTP is between the SP and the CTP, but it doesn't state measured from which point. For example, if the VTP distance was 1.00m, it could be 1.00 m from the SP (which seems pretty difficult), or 1.00m from the CTP (a lot easier). Am I missing something?
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Re: Mousetrap Vehicle C

Postby nicholasmaurer » September 4th, 2018, 5:44 am

antoine_ego wrote:
nicholasmaurer wrote:Anyone care to comment on whether the 3oz cup rule (5.c.) refers to weight or volume? I would assume volume - but it seems like a pretty glaring ambiguity to me...


I'm pretty sure it means volume, since 3 oz is 85 g, which would be unreasonably heavy for a paper cup.


Agreed. However, without an FAQ (or rule clarification changing it to fl oz.), I would rule in favor of an ES who used a cup of any volume that weighed 3oz OR a cup with a 3oz volume.

To be fair, last year's rules had the same ambiguity, but it was less concerning because it would be incredibly difficult to find a plastic cup weighing 16oz...
Last edited by nicholasmaurer on September 4th, 2018, 6:06 am, edited 1 time in total.
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Re: Mousetrap Vehicle C

Postby nicholasmaurer » September 4th, 2018, 5:49 am

antoine_ego wrote:There's some ambiguity in the placement of the VTP. It states that the VTP is between the SP and the CTP, but it doesn't state measured from which point. For example, if the VTP distance was 1.00m, it could be 1.00 m from the SP (which seems pretty difficult), or 1.00m from the CTP (a lot easier). Am I missing something?


I would refer you to the track diagram here which is incorporated as part of the rules per 6.a.
Last edited by bernard on September 23rd, 2018, 11:13 pm, edited 1 time in total.
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Re: Mousetrap Vehicle C

Postby antoine_ego » September 4th, 2018, 5:58 am

nicholasmaurer wrote:
antoine_ego wrote:There's some ambiguity in the placement of the VTP. It states that the VTP is between the SP and the CTP, but it doesn't state measured from which point. For example, if the VTP distance was 1.00m, it could be 1.00 m from the SP (which seems pretty difficult), or 1.00m from the CTP (a lot easier). Am I missing something?


I would refer you to the track diagram here which is incorporated as part of the rules per 6.a.


I think that might be the 2018 diagram. But thanks! I'll just wait until the diagram comes out :)
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Re: Mousetrap Vehicle C

Postby nicholasmaurer » September 4th, 2018, 6:04 am

antoine_ego wrote:
nicholasmaurer wrote:
antoine_ego wrote:There's some ambiguity in the placement of the VTP. It states that the VTP is between the SP and the CTP, but it doesn't state measured from which point. For example, if the VTP distance was 1.00m, it could be 1.00 m from the SP (which seems pretty difficult), or 1.00m from the CTP (a lot easier). Am I missing something?


I would refer you to the track diagram here which is incorporated as part of the rules per 6.a.


I think that might be the 2018 diagram. But thanks! I'll just wait until the diagram comes out :)


You're right - that is last year's diagram. I expect the new one will be out very soon and should clarify the measurements. It's hard to visualize/interpret without a diagram.
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Re: Mousetrap Vehicle C

Postby Things2do » September 4th, 2018, 7:30 am

nicholasmaurer wrote:Anyone care to comment on whether the 3oz cup rule (5.c.) refers to weight or volume? I would assume volume - but it seems like a pretty glaring ambiguity to me...

It sounded like volume to me too. It would be hard to find a 3oz weight paper cup, and the ES couldn't put anything in it since it's upside down.

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Re: Mousetrap Vehicle C

Postby Unome » September 4th, 2018, 8:30 am

nicholasmaurer wrote:
antoine_ego wrote:
nicholasmaurer wrote:
I would refer you to the track diagram here which is incorporated as part of the rules per 6.a.


I think that might be the 2018 diagram. But thanks! I'll just wait until the diagram comes out :)


You're right - that is last year's diagram. I expect the new one will be out very soon and should clarify the measurements. It's hard to visualize/interpret without a diagram.

From my reading, the position of the VTP is clear - the distances in 6.c.i are measured from the CTP. At regional and state distances the VTP is closer to the CTP than the SP. Although, I'm not quite certain what is meant by "right side", although I suspect "when facing the CTP" implies "when facing the CTP from the VTP".
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Re: Mousetrap Vehicle C

Postby terence.tan » September 4th, 2018, 9:33 am

Unome wrote:
nicholasmaurer wrote:
antoine_ego wrote:
I think that might be the 2018 diagram. But thanks! I'll just wait until the diagram comes out :)


You're right - that is last year's diagram. I expect the new one will be out very soon and should clarify the measurements. It's hard to visualize/interpret without a diagram.

From my reading, the position of the VTP is clear - the distances in 6.c.i are measured from the CTP. At regional and state distances the VTP is closer to the CTP than the SP. Although, I'm not quite certain what is meant by "right side", although I suspect "when facing the CTP" implies "when facing the CTP from the VTP".

In that case how will the wing nut mechanism work?
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Re: Mousetrap Vehicle C

Postby absolutezerok3 » September 4th, 2018, 6:02 pm

terence.tan wrote:
Unome wrote:
nicholasmaurer wrote:
You're right - that is last year's diagram. I expect the new one will be out very soon and should clarify the measurements. It's hard to visualize/interpret without a diagram.

From my reading, the position of the VTP is clear - the distances in 6.c.i are measured from the CTP. At regional and state distances the VTP is closer to the CTP than the SP. Although, I'm not quite certain what is meant by "right side", although I suspect "when facing the CTP" implies "when facing the CTP from the VTP".

In that case how will the wing nut mechanism work?


I was thinking of using a one sided wing nut

This is my interpretation of the new track:
Image
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Re: Mousetrap Vehicle C

Postby Things2do » September 4th, 2018, 6:17 pm

absolutezerok3 wrote:This is my interpretation of the new track:
Image

That's about what I was thinking. If only they would update this so we would know for sure.
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Re: Mousetrap Vehicle C

Postby terence.tan » September 4th, 2018, 6:30 pm

absolutezerok3 wrote:
terence.tan wrote:
Unome wrote:From my reading, the position of the VTP is clear - the distances in 6.c.i are measured from the CTP. At regional and state distances the VTP is closer to the CTP than the SP. Although, I'm not quite certain what is meant by "right side", although I suspect "when facing the CTP" implies "when facing the CTP from the VTP".

In that case how will the wing nut mechanism work?


I was thinking of using a one sided wing nut

This is my interpretation of the new track:
Image

what would be different about the one sided wing nut as to the normal setup. Because with the normal setup the mtv can only stop at its original spot or a spot behind the start point. How would we get the mtv to stop ahead of the start point?
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