Gun chronograph: Difference between revisions

 

The first electronic ballistic chronograph was invented by Kiryako ("Jerry") Arvanetakis in the 1950s.{{Citation needed|date=May 2011}} As consulting engineer under contract by NACA (later [[NASA]]), he was asked to find a way to accurately measure the velocity of various projectiles fired at [[hypersonic|hyper-velocities]] into a variety of engineered materials in anticipation of manned space flight. His first design was an open rectangular frame of square [[aluminum]] tubing with a screen of fine copper wire at both ends. Breaking the first wire started charging a [[capacitor]], breaking the second wire stopped it. Measuring the accumulated voltage and knowing the rate of charge the elapsed time could be accurately calculated.

 

==References==