Accession Number : ADD009777

Title :   Tower Erection System.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Stewart,Paul A

Report Date : 18 Aug 1982

Pagination or Media Count : 19

Abstract : The present invention is directed toward providing a system for erecting a portable antenna tower of substantial height and weight in a short time and in an adverse environment. On the top of the upper tower section, a lifting device having three liquid propellant rockets is mounted by means of four hydraulic actuators to each arm of a frame of the lifting device. A hydraulic system provides pressurized fluid to the actuators through controllable pressure regulators so that the rockets can be moved within defined limits to provide stability during the erection launch. The controllable pressure regulators of the liquid propellant rocket hydraulic system receives signals from a computer located at the base of the tower which monitors and controls the erection. A pressurized liquid propellant feed system provides fuel to the rockets during the erection launch. Further, a recovery device is attached to the frame so that after full erection, the lifting device is released from the top tower section and is lowered to the ground by a parachute so that it can be reused.

Descriptors :   *Patent applications, *Towers, Antenna components, Lifting bodies, Hydraulic actuators, Liquid rocket propellants, Adverse conditions, Portable equipment

Subject Categories : Electrical and Electronic Equipment
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE