Telemetry from Experimental Rescue- and Recovery Systems

Abstract

Measuring techniques in rescue and recovery systems are mainly applied to parachute and ejection seat systems. Thereby, the measurements of special interest are: forces occuring in the suspension lines of parachutes during inflation; accelerations acting on persons to be rescued or on materials to be recovered; the progress of velocities during the retarding of persons, ejection seats, test verhicles and so on; as well as measurements of the static pressure and possibly the outside temperature for the determination of altitudes. Further, the change of the projected area of a parachute during inflation will also be of interest. The data values are transformed by the transducers to analogue electric signals and telemetered to the ground station. To determine the projected area of the parachute during inflation this event is filmed by a high speed film camera which is installed in the rear of the test vehicle. Furthermore, the entire experiment is filmed from the ground by another high speed camera. On request, a cinetheodolite and a tracking radar installation is used additionally to get data concerning rate of descent and trajectory of the parachute-load system. (1,2)