I have a re set button on the bottom of the box, does yours?
I have a re set button on the bottom of the box, does yours?
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.
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
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.
This may help.
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
Probably need to start with your requirements...
Barrel mounted = cant be shot, can be used in confined spaces, can be less prone to interference
Need BC calculations? then its probably radar
Use safely in tight spaces?
Shot strings?
Interface requirements? Buttons/App...
The "formula" at the top of the page is completely wrong, it is 2 x G, not G squared. They have also used an old incorrect value for G. The calculation has used G + G which is not G squared and the way it is written would not give the answer they have if the calculation is carried out in the correct order. Also, grams and grains are measures of mass not weight, so basically whoever wrote that "formula" or carried out the calculation is mathematically ignorant. Unfortunately, only too common of people in the commercial forensic laboratories based on the evidence I saw when working.
The value 450436.7 comes when the internationally correct accepted value for acceleration due to gravity is used.
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.
Thanks for the reply Travis.
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.