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Pad Abort Test 1: Difference between revisions

Revision as of 04:20, 3 April 2006

Apollo Pad Abort Test 1

Apollo insignia
Mission statistics
Mission Name:	Pad Abort Test 1
Call Sign:	PA-1
Launch:	November 7, 1963 16:00:01 UTC White Sands Missile Range Area 3
Landing:	November 7, 1963 16:02:45 UTC
Duration:	2 min 45.1 s
Number of Orbits:	Suborbital
Apogee:	1.75 mi (2.82 km)
Range:	1.56 mi (2.51 km)
PA-1

Pad Abort Test 1 was the first abort test of the Apollo spacecraft.

Objectives

Pad Abort Test 1 was a mission to investigate the effects on the Apollo spacecraft during an abort from the pad. The launch escape system (LES) had to be capable of pulling the spacecraft away from a possibly exploding rocket while it sat on the pad. The LES then had to gain enough altitude to allow the command module's parachutes to open, preferably with the spacecraft over water and not land.

The flight featured a production model LES and a boilerplate (BP-6) Apollo spacecraft, the first mission to feature one. The spacecraft carried no instruments for measuring structural loads as the capsule's boilerplate structure did not represent that of a real spacecraft.

Flight

An abort signal was sent to the LES at 09:00:01 local time. This initiated a sequence where the main solid rockets fired to move the spacecraft craft and smaller attitude rockets fired so that the spacecraft moved laterally (atCape Canaveral this lateral movement would be towards the ocean).

The LES separated after fifteen seconds with the spacecraft now on a ballistic trajectory. The parachute system worked perfectly with the drogue chute stabilizing the spacecraft, followed by the three main parachutes that slowed the descent to a leisurely 26 kilometres per hour.

The only problems found in the whole flight were that the LES rockets had left a soot deposit on the spacecraft exterior, and that the stability of the spacecraft was less than predicted.

External links

• The Apollo Spacecraft: A Chronology
• Apollo Program Summary Report