flight readiness firing การใช้

• Because of growing confidence in the Atlas, it was decided to abandon PFRF ( Pre-Flight Readiness Firing ) tests except for the first handful of Atlas E flights as well as space launches.
• The PFRF ( Pre Flight Readiness Firing ) tests conducted on 4A and 6A also would have caused exhaust gases to go up into the boattail, and thus they probably already had internal damage at launch.
• Although Thors were given a PFRF ( Pre Flight Readiness Firing ) prior to launch, these were between 5-15 seconds only as the launching facilities were not designed for a full duration firing as a static test stand was.
• The engines, which were of the first manned orbital flight ( FMOF ) configuration and certified for operation at 100 % rated power level ( RPL ), were operated in a twenty-second flight readiness firing on February 20, 1981, and, after inspection, declared ready for flight.