There has been some speculation anions STOL aircraft designers (hat a net increase in lift might be realized from a combination of blown flap and slip-stream deflexion. A recent wind tunnel investigation confirms the speculation for large flap deflexions. At small flap deflexions, however, the lift gained by the combination is less than the sum of the separate contributions. The effect at medium flap deflexion is dependent on the strength of the slipstream. These results should be applicable to most configurations with a blown plain flap in the slipstream behind the propellers.
Blown Flaps for Stol Operation
An Examination of the Lift Increment due to the Deflexion of Propeller Slipstream by Large Span Blown Flaps
Aircraft Engineering and Aerospace Technology ; 31 , 10 ; 308-311
1959-10-01
4 pages
Article (Journal)
Electronic Resource
English
Externally blown flaps, aerodynamic feasibility study of a STOL-transporter
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