The Craftmans Shop > Backyard Ballistics
Spring air rifles
Jonny:
--- Quote from: mcostello on January 11, 2014, 10:04:29 AM ---I am a lurker from the USA.
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Its up to the owner and the person in possession of said air rifle to make sure its legal. Over here that's 12ft/lb energy.
Over 12ft/lb its classed as a section 1 firearm which licence has to be granted much the same way as any rim or centrefire rifle.
Neo the Buckley book waste of time and money, its 30+ years out of date old hat even though written in recent times last 10 yrs. You will learn a lot more than any book will teach and understand more if you take the 'deep end' In other words fresh look, no copying other mistakes work it out for yourself, its not rocket science.
Theres a big difference between making something copying others to making a one off design down to the last screw including working out the leverages for proper two stage triggers. Single stage anything will do, most cheapies are.
Manxmodder:
--- Quote from: Jonny on May 09, 2012, 03:19:36 PM ---Thats the way it should be John, other people cant grasp the concept or logic.
By keeping it tight and where delrin flexes off, steel keeps it straight in the direction of energy released.
Understand these tuners, they use springs locally made on a mandrel, nothing dimensionally accurate and have to fit all diameters. Of course this then gives off the twang and to combat that coat the spring with underbody car sealant or Rocal gear stuff to absorb this resonance. In doing so absorbs power or energy transmitted.
Whos fooling who, people are mugs paying for bad workmanship and raving about it after.
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Hi Jonny and Double Boost
Don't know if you're still reading this thread as your last posts were back in mid 2012.
Jonny makes some interesting observations about the quality and consistency of some tuners mandrel wound springs.
A long time pal of mine and partner in many crazy engineering projects over the years is also a gunsmith and an avid competition shooter of air weapons and full bore pistol.
We were recently talking about the effects that spring accuracy has on target grouping consistency and discussing the possibility of using square section cnc machined coil springs.
This route may sound a bit over the top and excessive but comp shooters are always looking for that extra degree of performance.
I just wondered if any of you guys on here had ever seen this type of spring used in an air weapon and if so how did it perform?
Here below is a link showing a photo of the type of spring I refer to:
http://cfnewsads.thomasnet.com/images/large/005/5086.jpg
Bye for now ,OZ.
Jonny:
Oz new one on me. Cant quite make out whether that's an air operated strut if you like or a machined from solid pitch to create a compression spring. Either way no good and disadvantageous both on multiple counts.
If its air filled or even a gas, it will be affected by temp then have that horrendous harsh recoil that breaks scopes.
If machined from solid the grain structure is not in the direction of the helix. Normal compression springs are from wire with the grain structure running the length. V springs well proper made ones should be turned (forged, folded, hammered) then opened out after and annealed = more strength.
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