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KH-4B

Rocket launch

by USA

Launch time17 Feb 197120:04 UTC

failure

Orbit: LEO

Serial number: Thor 537

Improper pre-flight procedure caused frozen lubricant to form a plug that resulted in complete turbopump failure 18 seconds after liftoff. The booster lost thrust and impacted the ground not far from the launch complex.

Rocket Thorad SLV-2H Agena-D

launched from Vandenberg AFB, SLC-3WUSA

Payloads

NamePurposeMassComment
KH-4B (S/N 1113)Reconnaissance--