loose springs

I have about a dozen loose unlabeled springs, has anybody come up with a solution on how to figure out how to guage spring velocity without actually putting spring in mechbox and chronying it. I dont know if its possible, but maby someone has come up with some type of clever technique.

TROLLS PLEASE REFRAIN FROM POSTING

[Danke]

Well you could measure length, count coils, and caliper the gauge but without info on what's what you'll really be doing some math.

You could also find some one near by with a shock dyno and build a rig to hold only the spring in it for test.

Probably assembling them and testing each is going to be the easiest real world solution.

[TokyoSeven]

Perhaps someone who owns and ICS M4 with a two piece mechbox would be kind enough to assist you it be a heck of alot quicker than doing it via any other aeg as far as I know atleast. I cant really think of any other way to find out what they shoot. If I do though, I will let you know.

[bean]

Only way I can think of to give you any useful info without slapping them in the guns would be to attempt to measure the spring constant. If you have a couple of springs you know the speed of use them as guide lines. Attach a mass of a specific height to the spring and see how much it stretches. Do this for all your springs and compare the results to the known values. Gives you a good ball park. The ones that stretch less are stronger and the ones that stretch the most are weakest.

[Tankdude]

http://www.airsoftcanada.com/showthr...pring+constant

[Mantelope]

MadMax came up with a simple procedure if you have some known springs. Compress them against each other on a long screwdriver or other shaft, and measure their compression. Springs of the same strength will have equal compression, but if they're different strengths, you can't really extrapolate how strong the unknown one is.

[666]

I won't mind getting all my springs chronied as well. Have about 15 of them sitting around ICS M4 seems to be the best way.

[Naglfar]

You can also measure it using a weight like bean said, but allow the weight to bounce. Count the number of oscillations in say, 1 minute, repeat a few times and average out the period of oscillation (time per oscillation). From this you can find the spring constant and heck, even find the maximum force that can be applied to a BB knowing the compression length and predict a velocity. Whooooo modern physics exam thursday!

[Solomance]

A star m249 has a nice quick spring swap on it too. Just pull one pin off the stock, flip the lever on the top of the mech box and out comes the spring gide and spring.

[666]

Originally Posted by Solomance

A star m249 has a nice quick spring swap on it too. Just pull one pin off the stock, flip the lever on the top of the mech box and out comes the spring gide and spring.

Do you have Star 249 Patrick ? If you do than we should meet at TTAC some time

[Solomance]

Not any more. Sold it to rockafella(?) out in bc. So he could gut it and run it CO2.

[ThunderCactus]

find someone with a CA or STAR 249 and a chrono

Actually I have a Star 249, just due to the length of the mech box you loose fps with springs, guess I could chrono with a spring I know, and use that as a base.