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Pilot 1 stage (NOTS-EV-1)

Pilot (ground launched) [USN]

Project Pilot was the first attempt to create a air launched satellite launch vehicle. The vehicle was better known by its nickname 'NOTSNIK', a combination of NOTS and Sputnik. The NOTS-EV1 was also the first all solid orbital vehicle. It was launched by a Douglas F-4D1 Skyray airplane. After separation from the aircraft, the first pair of HOTROC motors, derived from the SUBROC anti submarine missile, were ignited. Five seconds later, the second pair was ignited. After jettisoning the first stage, the X-241 and NOTS Extruded motors put the payload into a transfer orbit, which was circularised half a orbit later by the fourth stage, which was mounted backwards in front of the payload. As the vehicle was designed for maximum simplicity it featured no moving parts.

Four ground launched tests were made with only one pair of live HOTROCS. The first 2 failed due to exploding motors, the other two due to structural failure.

All launches apparently failed, most due to structural failures. Some rumours exist, that the payloads of the first and third orbital launch attempt reached orbit, but this remains very doubtful as an engineer involved in the project recalls, that there were some signals picked up by ground stations, but those were most probably not from the satellite.

After 10 launches the program was discontinued and an improved vehicle, called Caleb, was developed.

→ complete list of all Pilot related launches.

Version Aircraft Stage 1 Stage 2 Stage 3 Stage 4
Pilot (NOTS-EV1, Ground L.) * - 2 × HOTROC, 2 × HOTROC-Dummies Dummy Dummy Dummy
No  TNo:  Aircrft Type             Date           LS    Payload

 1    1   --     Pilot (Gr.Lau.)   04.07.1958 F  CL  * (R&D)
 2    2   --     Pilot (Gr.Lau.)   18.07.1958 F  CL  * (R&D)
 5    3   --     Pilot (Gr.Lau.)   16.08.1958 F  CL  * (R&D)
 6    4   --     Pilot (Gr.Lau.)   17.08.1958 F  CL  * (R&D)


Launch sites:

CL  = Naval Ordnance Test Station, China Lake, California, USA USA


Failures:

Flight 1:   vehicle exploded after 1 sec
Flight 2:   vehicle exploded before lift-off
Flight 5:   structural failure after 3.2 sec
Flight 6:   structural failure after 3 sec

References: