14 replies to this topic

[INsecurity]

Instead of the old measure after shot way, this seems more practical and only costs around $20
http://www.sci-spot....l/ballistic.htm

[ET87]

Wow, I have that exact same mouse. I might just have to make one, thanks!

[INsecurity]

would be great if as many people as possible could make them, that way would could get acurate measurements of blasters instead of people fighting over wether peoples distances are fake or not.

[INsecurity]

Sorry double post, Im an idiot.

Edited by INsecurity, 24 June 2005 - 11:53 AM.

[merlinski]

That's a very cool way of measuring velocity. There would still be variance - not everyone would accurately record the mass of projectile and mass of pendulum, but you're right that its much more standardized than "mine shot 100 feet flat".

[MattPaintballer]

That's sweet! I would love to use that instead of a chronograph, considering how expensive and annoying they are. Plus that thing is just so cool, and best of all it uses FOAM so you gotta love it .

THIS FOAM IS A LOT OF FUN.  I CAN'T STOP STICKING MY FINGERS IN IT.

I thought I was the only one who thought flower foam was cool .

[flashflint]

If you want a diferent design contact grunty he has a non meckanical design.

[baghead]

nice, you can save yourself alot of money an make one that has No electrical parts and do the calculations by hand

The Physics:
http://hyperphysics....ase/balpen.html

good how 2
http://www.sasked.go...s/u5a13phy.html

The Best one i've found for large projectiles is in the book Backyard Ballistics, there are alot of cool things in that book including an awesome air-pressure cannon that has great nerfing applications.

-Baghead

Edited by baghead, 24 June 2005 - 05:25 PM.

[grunty]

mine is alot cheaper but its ment for potato guns. it might work if you down size it.
for directions pm me! i got the idea from backyard ballistics.

Edited by grunty, 24 June 2005 - 06:32 PM.

[The Anarchy Department]

Correction-

The pendulum in the book works for anything, as will they all. That having been said, you use different-sized pendulums for different projectiles. The physics behind this are obvious even to small children; any attempt to measure the muzzle velocities involved in a potato cannon, such as my "Black Beast of Arrgh" would destroy the mouse/pendulum (Cool idea, by the way.); firing a Nerf dart at the huge "Backyard Ballistics" pendulum wouldn't even register. The physics remain the same.

~TAD

[NerfLad78]

Does the software calculate the ranges of the gun?

[merlinski]

Does the software calculate the ranges of the gun?

The software isn't designed for nerf, and it'd be impossible to do that. Range depends on a lot of properties, only one of which is initial velocity. It is also affected by the coefficient of drag for the dart, the mass, and the air pressure (although this has a smaller effect).

[Langley]

What are you talking about? Initial velocity is pretty much the only important factor. Dart drag can be easily factored in as if it's frictional force without loosing much accuracy.

[merlinski]

What are you talking about? Initial velocity is pretty much the only important factor. Dart drag can be easily factored in as if it's frictional force without loosing much accuracy.

If you want to experimentally determine the effect of air resistance on range, then you could calculate it with some accuracy. But it's definitely not something the software would be able to do, and it's definitely beyond any of our resources to calculate the actual coefficient of drag.

[NerfLad78]

I'm sorry, I'm not that smart. I don't want to sacrifice a mouse, plus, I think It's easier to go outside and do a Shoot-n'-Measure. Great Idea, though not practical for a Nerfer. At least THIS Nerfer.