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New Speed Contest Coming Tomorrow Answered

New speed contest to be announced tomorrow. Hint: You don't need a hint.

Discussions

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tech-king

10 years ago

we already answered that on your how to build a coil gun thread.

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guyfrom7up

10 years ago

correct me if I'm wrong: The nail head makes the magnetic flux no act upon the nail as well. Something to do with pointy shapes?

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tech-kingguyfrom7up

Reply 10 years ago

thats one of the three reasons: 1) the head of the nail causes bad contact between the nail and the barrel, causing loss of power and pad aerodynamics 2)the head of the nail keeps the point aimed down, causing accuracy problems 3) the point of the nail adds mass without adding power. its like you build a 3 engined rocket, but can only afford fuel for 2 engins. on takeoff, you have 3 engins, but only 2 are working. youd have to cut off the head and point to make it work.

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Doctor What

10 years ago

I hope it involves nails.

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Bran

10 years ago

Alright, just making sure. Plus, you can calculate anything with Google.

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Bran

10 years ago

Just type: (insert number here) m/s to fps in Google.

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Kiteman

10 years ago

Dammit! I'm going away in a few hours - does this mean I have to give another idea away?

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BranKiteman

Reply 10 years ago

Sure, I could use some ideas....;-)

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Spl1nt3rC3ll

10 years ago

Neato! Now that all my school projects are done, I might be able to actually do this one!

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guyfrom7upSpl1nt3rC3ll

Reply 10 years ago

... what state do you live in? My school just finished a bunch of projects today...

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Spl1nt3rC3llguyfrom7up

Reply 10 years ago

Washington. I doubt anyone here goes to my school though.

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tech-king

10 years ago

no. what part of

a nail is not a functional shape for a coil gun

is causing confusion?

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guyfrom7up

10 years ago

maybe, I've never actually made a coilgun, just did the research

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guyfrom7upguyfrom7up

Reply 10 years ago

it depends on the mass and the material of the nail.

This is what we're learning in science class now, yay

F=ma

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Goodhartguyfrom7up

Reply 10 years ago

F = ma Newton's second law of motion. There are a few assumptions in that "law". #1: notice that it is accurate "only" in a resistance-less world. That is, once an amount of force is applied, the same energy does not "keep" the object moving, but continued force must be applied (in the real world, if not in outer space).
#2: nothing it taken into consideration concerning mass/energy exchange, in this equation. Unlike "relativity" and quantum mechanics, Newton's equation is very un-real. It is accurate, in the given circumstance, but not in the observable world.

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PatrikGoodhart

Reply 10 years ago

Now don't confuse the poor boy! ;-) Newtonian physics is accurate enough that it took an Einstein to figure out how to correct it...

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GoodhartPatrik

Reply 10 years ago

Um, well I guess I should thank you for that comment. :-) I thought it looked funny too so that is why I researched it. ;-)

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ll.13

10 years ago

What time in GMT? =D

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Brennn10

10 years ago

Like joejoerowley said, it may have to do with speed. Because he said we don't need a hint.

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Firebert010

10 years ago

Ooh, I'd certainly love something wood-themed. Even if this contest doesn't involve wood, the next one has a good chance of doing so due to all the wood related comments.

I hope

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Brennn10

10 years ago

I hope its wood related...

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Tool Using AnimalBrennn10

Reply 10 years ago

Wood would be good, I had to do some wood bashing today after my dynamics test, my sanity was at stake, knocked together a nice little project, it'll end up a slide show.

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w00ty32

10 years ago

Im hoping for a food related one, cuz i have a recipe that i think shall go over well on this site...

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Goodhart

10 years ago

I am sorry, I am not sure I understand what you are asking.

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Goodhart

10 years ago

I'm sorry, I missed something there. I gave a link (my post below this one) to a m/s to fps converter, but it doesn't figure out to the last decimal point. If I understand your question correctly, if the wire is insulated / coated, any further insulation may reduce inductance i.e. output.

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joejoerowley

10 years ago

I think it has to do w/ speed maybe. Just a guess. God I hope it is really fun and there are awesome prizes. (Not that there are not normally just like total wicked prizes-like laser cutters for all that enter:)

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KentsOkay

10 years ago

Yay!! *prays to four deity's for a weapon related contest*

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Goodhart

10 years ago

The converter is not as accurate as doing it yourself however...

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Goodhart

10 years ago

IIRC 1 Meter per Second = 3.28083989501312 Feet per Second, soooo, if you had say 10 m/s that would come out roughly to 32.8(083989501312) fps.

If you need the answer but don't need the equation, this link works too :-)

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guyfrom7up

10 years ago

sure

1 M = 3.2808399 feet
so 1 m/s is the same as 3.2808399 feet per second
the / in m/s stands for per, so it'd be meters per second

so inconclusion, to convert m/s to fps just multiply the meters per second by 3.2808399

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Goodhart

10 years ago

is that meters per second or "miles per second" ? ooo, that would be fast...I guess not eh ?

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Sunbanks

10 years ago

Yay!!!!

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fungus amungusGoodhart

Reply 10 years ago

A speed contest and a website conference in Boston? Yeah... no.

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guyfrom7up

10 years ago

Well, I've been loaded down with homework, pressured into learning german at high rates (cramming about 1 and a half weeks worth everyday), working on many projects for school, preparing prjects for states competition for TSA (technology student association), learning how to weld at school so I don't have to rent a welder so I can make my cnc machine, and more stuff that I can't remember, and that's a bad feeling.

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guyfrom7up

10 years ago

I don't know If I should be happy or not, I have so much more important stuff to do... but it's instructables... I'm torn.