Thus in a non-deployed state, the spoiler plates have a non-detrimental effect on the performance of the airfoil, and may even contribute to its aerodynamic lift properties.

Lofting elements (318) are attached to the sheet for providing aerodynamic lift thereto to maintain the optical element (316) at a predetermined distance above the surface of the earth.

The ALBV has wings (23), which generate aerodynamic lift to assist in vehicle ascent, and tail fins (24), which perform attitude control while the vehicle is in the sensible atmosphere.

In the preferred embodiment, the wings (23) and tail fins (24) are jettisoned as the vehicle exits the sensible atmosphere and aerodynamic lift ceases.