N/A What’s your favorite springer?

[beerthief]

Figured it wouldn't hurt to elaborate on what it means

Welsh willy is an independent mainspring supplier in the UK and has a couple made to his own specs. The 'Dagda' is one of them which is 285mm long, has an OD of 19.6mm, a wire diameter of 3mm, 34.5 coils and has a spring rate of 5.1N/mm.

The original webley spring was 19.6mm, 30 coils, 3.25mm wire, with a rate of 8.8N/mm. This spring placed 200lbs/force on the piston with an 83mm stroke and 22mm preload....8.8x(83+22)×0.2248=200lbs/f

Once I'd cut the Dagda spring to the length needed to do the same 90Joules of work as the webley spring (8.8x(83+22)^2/1000=90J) it ended up at 255mm, with 30.5 coils, with 40mm preload, and the spring rate had increased to 6N/mm.

The bottom line is this.....the Dagda spring now does the same amount of work, but does it with just 165lbs of force- 6x(83+40)×0.2248=165lbs/f.

This means less energy/ less recoil/ slower recoil acceleration, so.....lighter cocking and a nicer cycle.

Hope that helps

HMMMM my head hurts now

 

[JamieUK]

I’m afraid it’s going to take at least my next lifetime to absorb that. My Lord.
I really find it staggering, how complicated these springers can get. Good for you. Your knowledge is amazing. Crow

It really isn't anywhere as complicated as it looks Crowski, take my word on it, I suck at maths!

Finding the spring rate is the hardest part, but you can get close inputting your spring specs into free online 'spring rate calculators'......once you have that, to find the Joules (this is the work done by your spring at the end of stroke/ cycle) the calc is just-

Spring rate X (stroke length + preload in mm's)^2/1000= Joules.

If you are happy with the fpe these Joules are currently producing in your springer, but want to change the spring (with say a spring that has thinner wire/ a larger OD etc) you can run the calc again, but just reduce the spring rate, and increase the preload (if going for a softer spring) or if going for a heavier wire, increase the sping rate/ reduce preload, until the Joules matches what you had before.

It's not an exact science, but gets you close enough so your not having to totally guess when cutting a new spring

 

[bustachip]

TX200SR hands down!
Just fabulous.


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I would love to try one.

 

[bustachip]

I think RWS 34 .22 tuned shot really well. So did my TX200.

1st, and the one I always go back to for pin point accuracy.

2nd, and just as accurate, just not as easy for me.

And 3rd, short range pin point accurate and fun to shoot.

 

[Lewis]

I LOVE the finish you did on that 97!

 

[bustachip]

I LOVE the finish you did on that 97!

Thanks brother.

 

[Hobbyman2007]

Thanks brother.

Now tell us how you did it. Please