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All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Engineering- Research & Development => Topic started by: truck driver on March 05, 2021, 05:47:31 PM

Title: Spring Tuning
Post by: truck driver on March 05, 2021, 05:47:31 PM

Been playing with spring length and wire size trying to get the most out of my spring powered D48.
I have found a spring that is shorter but spaced with guide power spacers seem to raise the velocity compared to one that isn't spaced and has more coils.
Can anyone explain why a spring that is shorter and spaced gives more velocity?

Title: Re: Spring Tuning
Post by: WhatUPSbox? on March 05, 2021, 10:51:51 PM

If you play with the online spring stiffness calculators (https://www.engineersedge.com/calculators/comp_spring_k_pop.htm (https://www.engineersedge.com/calculators/comp_spring_k_pop.htm)), using your spring details, the spring with fewer coils should be stiffer. So assuming the preload is comparable, then cocking it should take and store more energy.

Title: Re: Spring Tuning
Post by: truck driver on March 06, 2021, 11:07:04 AM

Thanks for the link.