Purpose of the flight and payload description
The Biosatellite nose-cone balloon tests were a series of high-altitude engineering flights conducted in 1965 by the U.S. Air Force Cambridge Research Laboratories (AFCRL) in support of NASA's Biosatellite program. Their purpose was to evaluate the aerodynamic characteristics and recovery system of the Biosatellite reentry capsule before orbital missions.
The tests consisted of releasing instrumented nose-cone mockups from stratospheric balloons at altitudes between 88,000 and 100,000 ft (2730 km) over the White Sands Missile Range. Following release, the vehicles underwent a free-fall trajectory in atmospheric conditions that closely reproduced the aerodynamic environment encountered during the terminal phase of spacecraft reentry. Measurements focused on the performance of the drogue deployment mechanism, the operation of the main parachute system, descent rate, vehicle stability and oscillation, and impact velocity.
The results validated critical elements of the capsule recovery system and contributed to the qualification of the Biosatellite reentry vehicle for subsequent orbital missions.
Details of the balloon flight
Balloon launched on: 3/17/1965
Launch site: Clifton-Morenci, Arizona, US
Balloon launched by: Air Force Cambridge Research Laboratories (AFCRL)
Balloon manufacturer/size/composition: Zero Pressure Balloon 5.025.000 cuft (1.0 mil)
End of flight (L for landing time, W for last contact, otherwise termination time): 3/17/1965
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 3 h
Payload weight: 1417 pds.
External references
- AFCRL Flight Record Scientific Ballooning, September 1965
- Scientific Ballooning Nº 19, September 1965
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