| 摘要 |
A thrust reactive surface 1, for positioning behind an aircraft, comprises support means (such as a concrete wall 2) for supporting the reactive surface, such that a flow of rearwardly directed gas generated by the aircraft may be directed onto the reactive surface. It is stated that this develops forward momentum of the aircraft. The surface may be concave and comprise a plurality of ridges 4 or a plurality of surface units. Means may be provided for adjusting the curvature of the surface, and further means may be provided for pivoting the surface from a first position, in which it is housed in a runway recess, to a second position, in which it is substantially perpendicular to the runway. The surface may comprise tapering sidewalls 7, which may have deflectors 8, and may establish a vortex. |
