storme37 Posted July 21, 2012 Report Share Posted July 21, 2012 (edited) phone chrono check this out Edited July 21, 2012 by storme37 Quote Link to comment Share on other sites More sharing options...
jamiedenny Posted July 21, 2012 Report Share Posted July 21, 2012 Chrono or range calc?. Other than measuring sound can't see how a phone would chrono. Measuring sound would be flawed anyway wouldn't it?. Quote Link to comment Share on other sites More sharing options...
Livefast123 Posted July 21, 2012 Report Share Posted July 21, 2012 Seems to be fairly accurate if you watch some of the Youtube vids. I think it works out the velocity from the sound......I haven't got a bloody clue how Quote Link to comment Share on other sites More sharing options...
UKJay Posted July 21, 2012 Report Share Posted July 21, 2012 It measures the time between the muzzle crack and the metal target being hit then calculates the speed of the pellet. You need to enter a few variables (distances and pellet grain, shape etc) and it does the math for you. Quote Link to comment Share on other sites More sharing options...
Steve72 Posted July 21, 2012 Report Share Posted July 21, 2012 What's the app called? Quote Link to comment Share on other sites More sharing options...
Gizza22196 Posted July 22, 2012 Report Share Posted July 22, 2012 im pretty sure you just plug in into your chrony and it does all the calculations for you Quote Link to comment Share on other sites More sharing options...
UKJay Posted July 22, 2012 Report Share Posted July 22, 2012 That's a different thing made by the same people - the is an iPhone and an android app called Chrono Connect Mobile that uses the inbuilt microphone to calculate the speed then it works out the ft/lbs when you input the pellet weight and ballistic coefficient. Quote Link to comment Share on other sites More sharing options...
Stot Posted July 26, 2012 Report Share Posted July 26, 2012 That's a different thing made by the same people - the is an iPhone and an android app called Chrono Connect Mobile that uses the inbuilt microphone to calculate the speed then it works out the ft/lbs when you input the pellet weight and ballistic coefficient. Yep thats right, the PC version connects to a real chronoscope and gives similar info to the app, the iPhone version is in the works at the mo but the Android version is available now and doesnt need to be connected to anything as It does indeed use the sound and pellet info to work out the speed and power of the shot and it is usually within 10fps (+/- 5fps) of a chrono readout when setup correctly. Some guns it can have a problem with but this can usually be sorted by changing the actual device/target distances or trying with/without silencers etc. If it gets a nice clean sample the math is sound. On my SLR98 it reads very high shots (100ftlbf sometimes) because of the inertia weight in the piston causing a double bang from the muzzle but theres even a setting to counteract that in the app. At the end of the day its better than shooting a can/the floor/a yellow pages to get a power indicator on your gun which was my intention when I started writing it. Cheers Stot Quote Link to comment Share on other sites More sharing options...
UKJay Posted July 26, 2012 Report Share Posted July 26, 2012 Good work - a very elegant solution :-) I have it on my tablet but have yet to try it out. Jay Yep thats right, the PC version connects to a real chronoscope and gives similar info to the app, the iPhone version is in the works at the mo but the Android version is available now and doesnt need to be connected to anything as It does indeed use the sound and pellet info to work out the speed and power of the shot and it is usually within 10fps (+/- 5fps) of a chrono readout when setup correctly. Some guns it can have a problem with but this can usually be sorted by changing the actual device/target distances or trying with/without silencers etc. If it gets a nice clean sample the math is sound. On my SLR98 it reads very high shots (100ftlbf sometimes) because of the inertia weight in the piston causing a double bang from the muzzle but theres even a setting to counteract that in the app. At the end of the day its better than shooting a can/the floor/a yellow pages to get a power indicator on your gun which was my intention when I started writing it. Cheers Stot Quote Link to comment Share on other sites More sharing options...
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