Powerplants for VTOL aircraft: A proposed dual-operation system using wing-immersed fans for vertical thrust

Calculated performance and weight data are presented for a category of VTOL powerplants in which highly loaded fans (500 lb./ft²), immersed in the wings, are used to augment the hovering thrust of conventional turbojet engines. The augmentation ratio, shown to be of the order of 3.5, implies a satisfactory matching of the cruising and hovering...

Powerplants for VTOL aircraft: performance calculations for several hypothetical turbofan engines

Calculated performance data are presented in tabular form tor a wide range of altitudes, forward speeds, and engine speeds, for four hypothetical aft-turbofan engines, of bypass ratios 0, 1.39, 3.13, and 8.24. These performance data are used along with weight estimates to illustrate the application of turbofan engines to a typioal VTOL mission....