NATIONAL ADVISORY COMMITTEE FOR AERONAUTICSnRESEARCH MEMORANDUM INITIAL FLIGHT TEST OF THE NACA FR-l-A, A LOW-ACCELERATION ROCKET-PROPELLED VEHICLE FOR TRANSONIC FLUTTER RESEARCH

摘要

The first of a series of flutter rockets, designated the NACA FR-1—A, was successfully launched and flown at the Pilotless Aircraft Research Station, Wallops Island, Va. Two identical swept wings were tested; the left wing failed at 967 feet per second (659 miles per hour, Mach number M = 0.89) and the right wing remained on the model throughout the entire flight (maximum Mach number of 1.0).nThe experimental value of failure speed obtained at a Mach number of O.89 was 76.2 percent greater than the flutter speed obtained using the two-dimensional, incompressible, unswept-wing flutter theory.