V/STOL Airframe/Propulsion Integration Problem Areas

The integration of V/STOL airframe and propulsion systems requires consideration of problems not experienced in conventional aircraft. These problems are discussed in terms of several propulsion arrangements of lift jets and vectored cruise engines. Thrust requirements are compared for the propulsion arrangements and the exhaust flow pattern, and its interference and reingestion effects developed in ground proximity, are reviewed. Selected design problems involving store and landing gear location and the use of lift jets for emergency cruise are discussed. Finally, a comparison is made of the weight and costs of the aircraft, each using a different propulsion arrangement.