Report of the PRESIDENTIAL COMMISSION
on the Space Shuttle Challenger Accident
Volume 5 Index
Hearings of the Presidential
Commission on the Space Shuttle Challenger Accident: February 26,
1986 to May 2, 1986.
MARCH 21, 1986 SESSION. (part 2 of
2)
[1350] [Ref. 3/21-61]
Liftoff Film Evaluation.
LIFTOFF FILM EVALUATION
- 51-L WAS COMPARED WITH 41-D
- SRB TIP DEFLECTION 24" (51-L); 28"
(41-D)
- FREQUENCY WAS APPROXIMATELY 0.25 HZ FOR
BOTH VEHICLES
- 25 HZ MODE AT APPROXIMATELY 600 PSIA
THRUST WALLOWS AROUND IN NOZZLE
- 30 HZ MODE AT APPROXIMATELY 1200 PSIA
NOZZLE FILLS MACH CONE (VISIBLE)
- LIFTOFF CLEARANCE NEAR NOMINAL
R-4
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