Accession Number : AD0687167

Title :   PARAMETRIC INVESTIGATION OF STOL AIRCRAFT,

Corporate Author : POLITECNICO DI TORINO (ITALY) ISTITUTO DI PROGETTO DI AEROMOBILI

Personal Author(s) : Gabrielli,Giuseppe

Report Date : JUN 1960

Pagination or Media Count : 73

Abstract : The parametric investigation consists of the evaluation of the minimum take-off and landing lengths, as affected by some parameters (wing loading, maximum lift coefficient, engine thrust to aircraft A.U.W. ratio, thrust deflection angle), for a jet propelled STOL aircraft capable of complying with any other requirement of G.O.R. 2 (including mission profile, military loads, etc.). The take-off performances are evaluated under the basic assumptions that the take-off from the ground is obtained mainly through the aerodynamic lift of a wing provided with high lift devices and that the aircraft is mainly controlled during take-off by conventional aerodynamic means. Aircraft with geometrically similar wings are considered (that is, having identical wing sections, planform, sweep-back angle, etc.). The wing shape was selected. Aircraft powered by two different propulsion systems are considered and compared. The first propulsion system consists of a single high by-pass and medium compression ratio turbofan engine provided with swivelling propelling nozzles. The alternate is a composite system, consisting of a single medium by-pass and high compression ratio turbojet engine giving horizontal thrust and of two, or more, booster turbojets, to be used during take-off only, having a low compression ratio and provided with propelling nozzles which may be deflected downwards at different angles. Furthermore, in the most significant instances, the investigation covers the climb paths and the high speed manoeuvre boundaries and evaluates safety and operational flexibility factors. Author)

Descriptors :   (*SHORT TAKEOFF AIRCRAFT, PERFORMANCE(ENGINEERING)), TAKEOFF, AIRCRAFT LANDINGS, AIRCRAFT ENGINES, AERODYNAMIC CHARACTERISTICS, TURBOFAN ENGINES, AVIATION SAFETY, COSTS, ITALY

Subject Categories : V/STOL

Distribution Statement : APPROVED FOR PUBLIC RELEASE