Download or read book Hovering Flight Tests of a Four-engine-transport Vertical Take-off Airplane Model Utilizing a Large Flap and Extensible Vanes for Redirecting the Propeller Slipstream written by Louis P. Tosti and published by . This book was released on 1955 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the take-off, landing, and hovering-flight characteristics of a four-engine-transport, vertical take-off airplane has been conducted with a remotely controlled free-flight model. The model had four propellers distributed along the wing with thrust axes parallel to the fuselage axis. In order to produce direct lift for hovering flight, the propeller slipstream was deflected downward about 70 degrees by a full-span 65-percent-chord flap deflected 90 degrees and eight extensible vanes arranged above the wing in a cascade relation.