9 citations · 17 across the 10 of their papers we have counts for
4 papers · 1 filter
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…
Powder Lot Variations: A Case Study with Varget - Hodgdon Extreme
Elya Courtney, Michael Courtney
Small arms propellant distributor Hodgdon claims that rifle powders in its Extreme line have small velocity variations with both temperature changes and lot number. This paper repo…