9 citations · 17 across the 10 of their papers we have counts for
11 papers
Accurate Radar Measurements of Drag Coefficients in Free Flight
Elya Courtney, Collin Morris, Michael Courtney
Undergraduate lab design balances several factors: 1) simple experiments connected with learning objectives 2) experiments sufficiently accurate for comparisons between theory and…
Effects of Sound Suppressors on Muzzle Velocity, Bullet Yaw, and Drag
Elya Courtney, Roy Couvillion, Amy Courtney +1
Little has been published regarding whether and how sound suppressors impact bullet flight, including velocity, bullet yaw, and drag. These parameters were compared for four differ…
Accurate Measurements of Free Flight Drag Coefficients with Amateur Doppler Radar
Elya Courtney, Collin Morris, Michael Courtney
In earlier papers, techniques have been described using optical chronographs to determine free flight drag coefficients with an accuracy of 1-2%, accomplished by measuring near and…
Experimental Tests of the Proportionality of Aerodynamic Drag to Air Density for Supersonic Projectiles
Elya Courtney, Amy Courtney, Michael Courtney
Pure theory recognizes the dependence of supersonic drag coefficients on both Mach number and Reynolds number, which includes an implicit dependence of drag coefficient on air dens…
A More Accurate Fourier Transform
Elya Courtney, Michael Courtney
Fourier transform methods are used to analyze functions and data sets to provide frequencies, amplitudes, and phases of underlying oscillatory components. Fast Fourier transform (F…
Methods for Accurate Free Flight Measurement of Drag Coefficients
Elya Courtney, Amy Courtney, Michael Courtney
This paper describes experimental methods for free flight measurement of drag coefficients to an accuracy of approximately 1%. There are two main methods of determining free flight…