Test results from studies of small and large powered models of a dual, tandem, ducted-propeller VTOL design are reviewed, with emphasis on stability and control characteristics through the transition speed range. The characteristics are generally satisfactory. Stability augmentation may be required to reduce Dutch roll tendencies. Further study is needed to evaluate the apparently large side-force gradients in sideslip. Reductions in control effectiveness due to ground proximity are similar to those for tilt-wing V /STOL designs.
Aerodynamic stability and control of ducted- propeller aircraft
Conference on V/STOL and STOL aircraft ; 1966 ; Mountain View, CA, US
Conference on V/STOL and STOL aircraft ; NASA-SP-116
1966-04-04
Conference paper
No indication
English
Small aircraft propeller noise with ducted propeller
AIAA | 1998
|Tilting ducted propeller blade aerodynamic configuration design method
European Patent Office | 2023
|