ORIGINAL Aviation History DOCUMENTS Wind Tunnel REPORT CROSBY CR-4 RACER PLANE

Description

ORIGINAL DOCUMENTS  Crosby CR-4 Racer, 1936
(The Crosby CR-4 first flew in 1938 and was constructed by students from the Curtiss-Wright Technical Institute in Glendale, California)
Original Wind Tunnel Report by the Guggenheim Aeronautical Laboratory & California Institute of Technology (Pasadena) -CALTECH
MAY 29, 1936 Full Report, 27 pages LOTS of Photos and graphics
Great addition to an Aviation History Collection
The Crosby CR-4 is the follow-on of the Menasco C6S-4 powered Crosby CR-3 (a.k.a. C6R-3) designed to be powered by a twelve-cylinder Ranger V-770 engine[1] The aircraft was designed while Crosby was recovering with a broken back and fractured skull from the 1936 crash of his all metal CR-3. Despite a prior failure causing a crash, money shortages prompted Crosby to reuse the Menasco C6S-4 engine from his former racer. Funding for construction came from fellow racer Kieth Rider. Students from the Curtiss-Wright Technical Institute in Glendale, California assembled the aircraft.
Design
The CR-4 is a low-wing monoplane with conventional landing gear. The construction is all-metal stressed skin. The triangular wings featured a straight leading edge with a long chord tapering to a point at the wingtips. The left cowling held a combination oil tank and surface cooler. The seat and canopy adjusted up six inched in travel for take off and landing visibility. The landing gear used compressed air from a Lux air bottle rather than mechanical or hydraulic mechanism. Copper filings found later in the line, combined with wind resistance prevented on leg from locking.