A chrono'ing method for those with the right gear

An Mac Tíre

I'm new to airsoft, but the physicist in me couldn't resist trying to chrono my new L96 without buying a chrono! (I spent all my money on my gun ). I got out my laptop and did some tests! I wrote an instructable for all you folks to try this out for yourselves.

http://www.instructables.com/id/AirsoftAirgun_or_other_projectile_throwing_devic/

It isn't perfectly accurate but it should give you a fair idea of what speed and energy your gun is kicking out. It could be adapted to give you rate of fire too. Which I just wrote up actually. Being sick gives you lots of spare time... anyway here's the link to this one.
http://www.instructables.com/id/How_to_use_my_chronograph_method_to_get_ROF/

Tigger

An Mac Tíre wrote: »

I'm new to airsoft, but the physicist in me couldn't resist trying to chrono my new L96 without buying a chrono! (I spent all my money on my gun ). I got out my laptop and did some tests! I wrote an instructable for all you folks to try this out for yourselves.

http://www.instructables.com/id/AirsoftAirgun_or_other_projectile_throwing_devic/

It isn't perfectly accurate but it should give you a fair idea of what speed and energy your gun is kicking out. It could be adapted to give you rate of fire too!

excellent 1st post

i shall call you kd ver 2.0

Busta Hyman

well done great work there fellah

i play at the warehouse 1 or 2 times a week so my gun gets well cronoed tho

NMC

well done man, interesting stuff!

Mauser

thats the wierdest thing i ever heard (no pun intended)
will have to move the pc and give it a go over the weekend
told the wife about it and she thinks that i am gone madder then before
if this test leads to a divorce i owe you a big drink

kevteljeur

KD actually posted a link on this here previously, when I was asking about chronoing and I tried it myself. It's tricky; misinterpreting the result can make a big difference in the interpreted power output. I'd say that you could use it as a very rough guideline at best.

An Mac Tíre

Yeah when I wrote the instructable I only meant it to be a rough guide, but you can get some pretty close results. My L96 was clocked at .96 joules in shop, and when I figured out which part of the waveform was when the shot left the barrel and did the maths I got .94 and that was at 5 metres, so it just takes a little time and some common sense to disregard nonsense results.:rolleyes:

(with the shotgun in the photograph I got nearly 2 joules on my first try:eek:, but it isn't even as powerful as the rifle. Looked at it again and got .7 which is much closer.)

Mauser

sorry what photograph
my wife and kids are in the balance

An Mac Tíre

Let me help tip the scales so . The photograph of the spring shotgun on the instructable in the link. It's sitting against my blue wall next to my L96 and my crossbow :P. I am writing an extra instructable based on the same method to give you ROF of your gun. I will edit the link into my first post for the sake of making it easy to find.

An Mac Tíre

I'm awfully scatterbrained at the moment (have been sick) so I think of something to post, and when I post I post something entirely different! Last time I'm gonna be the only guy talking in my own thread, I swear;)

If any of you 'softers out there have a gun that you know the power or speed of, and have (or are willing to) try my method, could you please post the results and compare to what my method gives? I'd just like to see how far off my method is. I thought I'd get that type of reply on instructables but they obviously don't have as dedicated an airsoft community on there. I got most of my views on it after I posted a linky here! Thanks in advance folks:)