xi APACHE) Project 5,8 - In-Flight Participation of the A3D-) Aircraft - LCOR P.S, Harvard OBJECTIVE The objective of this test was to nvestigate the A3D-] aircraft capability for the delivery of nuclear weapons by the measurement and correlation of the in-flight effects of a nuclear detonation, LNSTRUMENTATION Instrumentation of the A3D-1 eircraft consisted of 96 oscillograph recording channels, one photo recorder, four GSAP cameras, and three dosimeters. The data recorded included temperature rise, thermal input, rate of thermal input, overpressure, gust loading, aircraft response, engine response, and gamma radiation. : POSITION The A3D~]1 aircraft was flying at an absolute altitude of 26,000 feet, heading 276°T in a tail-on position at H + 0, Slant range to ground zero at H + 0 was 36,780 feet, (aircraft TAS 830 fps) aircraft position at time of shock arrival DELETED on & heading of 276°T at 25,500 feet absolute altitude. RESULTS Thermal: Sy s ; Overpropssure: Garma: DELETED Approximately 0.001 roentgena of radiation was received in the cockpit of the A3D-1 aircraft,