148 citations · 496 across the 54 of their papers we have counts for
55 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…
Secrets of Successful Science Projects
Amy Courtney, Michael Courtney
Over the past several years, the authors have served as teachers, qualified scientists, mentors, and/or parents on dozens of science projects. These projects ranged from elementary…
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…
Terminal Performance of Lead-Free Pistol Bullets in Ballistic Gelatin Using Retarding Force Analysis from High Speed Video
Elijah Courtney, Amy Courtney, Lubov Andrusiv +1
Due to concerns about environmental and industrial hazards of lead, a number of military, law enforcement, and wildlife management agencies are giving careful consideration to lead…
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…