b'SECRET METSUMSALHELLACIOUS HUMAN!II lost a day to research and am now an From before issue one, I was told NEVER to reveal this calculationown The Practical Guide to Man-Powered Weapons & Ammunition. Itinstant expert on the Shooting Chrony covers bows, crossbows, blowpipes,product line.airguns and deep stuff about catapults.Here is how to measure your foot-pounds.Some of the maths in there is beyond me. It goes into how to work out a1)Weigh your projectile in grains.catapults power in Foot-Pounds, the same2)Shoot it through the space above way that airguns are normally measured. the chrony and get a feet per second In the UK, you need a firearms certificatefigure.to own an airgun that has more than 123)Multiply the fps figure by itself. ft.-lb. of power. Air pistols are limited to 6(Squared is the maths term.)ft.-lb. 4)Now multiply that figure by the weight Fans of the Slingshot Channelsin grains.legendary Jrg Sprave know that he likes5)Divide the big old number you now to measure his human power in Joules,have, (of V2 x Mass) by 450.24which dont have the same flavour for an airgunner. We understand foot-pounds asAnd you will have your result, in Foot-a measure of power. Pounds of YOUR slingshot power.There is a video of Jrg in the USA shooting one inch steels at the end of a pendulum. He also tested handguns up to a .44 magnum and found he was able to swing the pendulum further than any hand gun except for the magnum. He also calculated that he had made 99 ft.-lb. So how much power did I make?Here is how to work out your HumanThe fastest I managed was 245.9 feet Power. You will need fine quality scalesper second with an 8mm steel.to weigh your ammo and you will need aMy best power was a 12mm lead ball chrony. This is a device used in ballisticsand a Saunders Pro-X to get 11.803 ft.-to measure speed through a measured bitlb. I am legal power!of space. My average for each ammo was:Lead 8mm 5.65 ft.-lb; 10mm 5.56 ft.-lb; Shopping 12mm 8.65 ft.-lb.There are over fifteen grains to a gram. You need scales that can weigh 0.01g. CheckFor steel it was 8mm 3.84 ft.-lb; 9.5mm that the scales units of measurement include gn. I bought the TW2-100 from www. 4.84 ft.-lb; 16mm 10.37 ft.-lb; 19mm ourweigh.co.uk for just 9.50. (Or call them on 0151 486 2150) 11.31 ft.-lbThe Shooting Chrony comes in several forms from basic to ones with big cleverI broke something on each of the three memories. Choose if you want to measure m/s or fps. They can be all-in-one or havesessions. One dropped frame, one a remote display or add-on a printer unit for some more dollars. I wanted one withsmash-hit frame and I smacked the a remote display so bought an F1 Master Chrony (121) and also some aftermarketChrony amidships, sliced the three Perspex shields as well for an extra 12. strand wire and had to fix it!055SlingshotWorld 055055_SSW004 Taboo.indd 55 31/07/2020 13:36'