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Chrono Calibration

There is probably a market for 10 chronos even if you convinced every single force to adopt your particular model. I would imagine the Police are very conservative in nature and it would take too much effort to break into their very limited market. Good for sales though "as used by the MET Police etc etc".
 
NateChrony said:
In a vacuum right?
whats the vacuum?

How about a light source, split with a prism which partially reflects into both sensors?
Same beam, split in 2 - extra distance, known time... easy!
Click to expand...
A laser would be better projected up to a mirror then across to a rear mirror and down to a receptor . the pellet then breaks a single beam twice . keeps it to a single censor then .
20260711_221404.webp
then all you have to do is time the breaks in the single beam .

🤔 A strobe rpm counter ...........
 
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Very interesting, not read the whole thread. Obviously the results will only ever be as accurate as the pellet mass you enter, which brings us to the question how accurate and how well calibrated is the balance you wish to buy?
 
1260engineer said:
A laser would be better projected up to a mirror then across to a rear mirror and down to a receptor . the pellet then breaks a single beam twice . keeps it to a single censor then .
View attachment 1023322
then all you have to do is time the breaks in the single beam .

🤔 A strobe rpm counter ...........
Click to expand...
One or two of us might have trouble hitting the laser beam once, with one shot, let alone twice 🤣 🤣 🤣 🤣 🤣 🤣 🤣
 
Calibration sounds like a great idea, until you get into the details. I spoke at length to a commercial calibration company and after they had a look at a couple of chronographs. They stated that in their opinion. Trying to calibrate a hobby grade chronograph was a waste of time. Too many factors affect them, and they were unable to certify the calibration beyond a very limited number of shots and only then if the chrono remained where it was calibrated, and conditions remained constant. These guys work with optical sensors day in and day out. As far as they were concerned we might as well have been using pebbles in a bucket to weigh something. If we want £100 chronographs, we just have to understand that the results may vary slightly
 
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