I have a re set button on the bottom of the box, does yours?
Registered User
I have a re set button on the bottom of the box, does yours?
Registered User
I have a Chrony Alpha, it's accurate and saves a string of shots etc. so great functions
But it takes a lot of time to set up and I'm always wary about killing it with a misplaced shot. Thankfully the Alpha has the brain on a lead so the front is metal but not very thick.
But I'd like an FX for sure.
Dunkingdonuts
The LNBR chronos are used in both the FT and HFT comps. I have one for setting up serviced steyrs.
Chairman Emley Moor F.T.C. 2023 - Misfits champ, HFT extreme champ, NEFTA hunter champ, Midlands Hunter champ, UKAHFT champ.
https://sites.google.com/site/emleymoorftc/contact-us
Professional Dogsbody
On the cheap chinese ones you need a calculator to change mps -fps. i use a app on my phone called air gun calc. works very well and easy to use.
Registered User
This may help.Originally Posted by billywhizz1
FPS = Feet Per Second, MPS = Meters Per Second, FPE = Foot Pounds of Energy
To convert to Joules multiply FPE by 1.3558, Joules to FPE multiply by .7376
To convert MPS to FPS, MPS x 3.2808399 = FPS
To convert FPS to MPS, FPS x .3048 = MPS
FPE Formula is Pellet weight (gr) x FPS x FPS divided by 450240 or 450436.7
Registered User
I've never heard about dividing by 450436.7 before......can you elaborate please Travis? Thanks.
I have been using a Skan for years, it's been superb.
Registered User
How about dividing by 450800 ???
this is from the Helston Forensics Standard Airgun test;
Registered User
450240 is 2 x velocity of gravity x 7000, (2 x 32.16 x 7000 = 450240)
450436.7 is 2 x velocity of gravity x 7000, (2 x 32.17405 x 7000 = 450436.7)
The constant 450240 or 450436.7 depends on which value you use for the velocity of gravity.
32.16 ft/s/s or 32.17405 ft/s/s. There are 7000 grains in one pound.
The difference does not matter which ever constant is used for the FPE calculation.
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