SuperChrono Acoustic shooting chronograph

W

wheelgun

CGN Regular
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Location
Winnipeg
Any of you have any experience with this item???

If it works as advertised it opens up new opportunities for down range velocity checks.
No screens!!!!


You will have to google it for more info, there is a youtube video as well.

They are also sold on ebay.


Sensor type Ultrasound microphones Detection principle Passing of Mach cone
Detection distance From 25cm (10’’) from the muzzle to any downrange distance for supersonic speed
Velocity range Mach 1.1 to Mach 5 (in dry air at 20°C (68°F) 376 – 1717 m/s or 1234-5632 ft/s
Calibre range 4.3mm (.17) to 84mm
Accuracy +- 0.5% of measured velocity or better
Minimum time between shots 100ms = 600 rounds per minute
Shooting area, max height 1.3m (51’’) above sensors
Shooting area, max width 80cm (31.5’’) at 100cm (40’’) above sensors
Size 260mm x 120mm x 46mm (10.2‘’x 4.7‘’x1.8‘’)
Weight 285g (10oz) without batteries
Batteries 4 AA: NiMH, Li-Ion or alkaline
Battery life 16 hours with alkaline batteries
Start up < 2 sec
Memory capacity 99 shots. Will stay when off
Pushbutton features Previous and next shot in shot string,
average, reset, m/s, ft/s, on-off
Mounting hole thread ¼ - 20’’
Environmental rating IP66
Compliance CE, FCC Class A
Operating temperature - 20 to + 70 °C (-4 to + 158°F)
Storage temperature - 30 to +80 °C (-22 to + 176°F)
Display High-contrast LCD with LED backlight; sunlight readable
 
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I also heard of (but havent seen or used) a sonic thing that has several (3?) sensors around the perimiter of the target that listen for the sonic crack. By timing the slight difference in time to each of the mics, it can plot where the bullet passed by. It relays this back to a screen at your bench.
No more walking 200 M to your target!
 
A very nice device with one incredibly stupid flaw, you cannot read it without clearing your firearm and walking downrange! This will be useless for most of us who shoot at clubs with multiple shooters, how many times can you expect to shut down a range to go out and read your chrony??

Why not put the readout facing the shooter instead of facing the sky? To bad as I was really looking forward to one of these, the ranges I shoot on have miserable problems with shadows and I have not been able to use my chrony on any of my last 4 trips.
 
Well, at least they are a responsive company, I emailed my above complaint to them, and 5 minutes later got a reply. A bluetooth enabled version of this is in the works for release later this year. :)
 
+/- .5% error is 15 fps at 3000, and this is a GOOD quality chrony. really shows how getting all chuffed/pissed about ES with a $100 unit is a waste of time. Results tell most of the story.
 
For testing ammo, you don't need a chrono that is particularly accurate. If you had a chrono that was giving you readings that were consistently 3% slower than the bullet was really going (e.g. a 3000fps bullet being reported as 2910fps), that wouldn't necessarily be a problem

You do need one that is precise enough to measure your ammo's SD and ES. "precise enough" means that your chrono's measurement precision (not accuracy) is better than the velocity errors/spread in the ammo you're trying to measure.
 
I've been wondering about that. Generally with machinery and inspection equipment we worry about accuracy, and repeatability and each has a number.
So for chronographs, if they call for a 15fps accuracy, can a 3000fps bullet read 2985 and the next one read 3015? cause that's the way I interpret that type of specs.
 
Your interpretation is a reasonable one, but - as soon as you start to sensibly talk about measurement accuracy, precision, repeatability etc, the sad reality is that you are more technically sophisticated than most manufacturers. They might say, for public consumption, that their gear is "99% accurate"... but if you try to find out what they really mean by that, and what the gear is actually capable of, you'll often find that they (the manufacturer) doesn't honestly know.
 
Could be fun to experiment with putting 2 or 3 chronographs of same brand in a straight line and see what speed each one picks up for the same bullet.
 
After first checking this chronograph against the chrony, my first experiment would be to put the sonic one at the 1000 yard target and have a second chrony right at the rifle. I would like to know what any variations in load translate to at 1000 and this appears to be the tool to do it.
 
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