X-15A-2

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X-15A-2

Part of X-15A

X-15A-2
Credit: NASA

American manned spaceplane. The crash-damaged X-15 number 2 was rebuilt to attain even higher speeds. The body frame was stretched, and two drop tanks were added, increasing propellant load by 75%. Reached Mach 6.7 and 108 km altitude.

Thrust: 262.45 kN (59,000 lbf). Gross mass: 25,455 kg (56,118 lb). Unfuelled mass: 8,317 kg (18,335 lb). Specific impulse: 276 s. Height: 15.47 m (50.75 ft). Diameter: 1.42 m (4.65 ft). Span: 6.80 m (22.30 ft). Apogee: 75 km (46 mi).

An ablative heat shield was applied to protect the spaceplane during re-entry. The X-15A-2 reached the highest speeds and altitudes of any manned spaceplane until the space shuttle entered service.

The X-15A-2, modified from the number two aircraft and delivered to NASA in February 1964, included among other new features, a 28-in. fuselage extension to carry liquid hydrogen for a supersonic combustion ramjet that was flown (as a dummy) but never tested. It also had external tanks for liquid ammonia and liquid oxygen. These tanks provided roughly 60 seconds of additional engine burn and were used on the aircraft's Mach 6.7 flight. While adding to the speed the X-15 did achieve, the tanks also increased the aircraft's weight to almost 57,000 lb and added significantly to the drag experienced by the aircraft in flight.

700 hours was needed to refurbish the heat shield. The ablative covering had to be completely stripped off, then reapplied. After the record Mach 6.93 flight, the aircraft received thermal structural damage and the covering was severely pitted and charred. Repair was uneconomical and the aircraft was grounded.

Crew Size: 1. Spacecraft delta v: 2,020 m/s (6,620 ft/sec).

Data - X-15A-2

Stage 0. 1 x NB-52. Gross Mass: 177,273 kg (390,820 lb). Empty Mass: 70,545 kg (155,525 lb). Thrust (vac): 430.472 kN (96,774 lbf). Isp: 5,142 sec. Burn time: 48,000 sec. Isp(sl): 4,675 sec. Diameter: 14.72 m (48.29 ft). Span: 56.40 m (185.00 ft). Length: 47.74 m (156.62 ft). Propellants: Air/Kerosene. No Engines: 8. Engine: J57-19. Status: Out of Production. Comments: Boeing Bomber-swept wing. Maximum release conditions: Wing mounted, 25,000 kg (19.1 m length x 6.7 m span) at 880 kph at 11,448 m altitude.

Stage 1. 2 x X-15A-2 Tanks. Gross Mass: 7,026 kg (15,489 lb). Empty Mass: 902 kg (1,988 lb). Isp: 276 sec. Burn time: 55 sec. Isp(sl): 239 sec. Diameter: 0.98 m (3.21 ft). Span: 0.98 m (3.21 ft). Length: 6.86 m (22.50 ft). Propellants: Lox/Ammonia. No Engines: 0. Engine: None. Status: Out of production.

Stage 2. 1 x X-15A-2. Gross Mass: 16,069 kg (35,426 lb). Empty Mass: 7,766 kg (17,121 lb). Thrust (vac): 262.445 kN (59,000 lbf). Isp: 276 sec. Burn time: 90 sec. Isp(sl): 239 sec. Diameter: 1.42 m (4.65 ft). Span: 6.80 m (22.30 ft). Length: 15.47 m (50.75 ft). Propellants: Lox/Ammonia. No Engines: 1. Engine: XLR-99. Status: Out of Production.

More at: X-15A-2.

Family: aircraft-launched, Rocketplane, Spaceplane, Suborbital, US Rocketplanes. Country: USA. Engines: J57-19, None, XLR99. Propellants: Lox/Ammonia. Stages: X-15A-2 Tanks, NB-52, X-15A-2 stage. Agency: USAF, North American. Bibliography: 38, 4312, 44, 459, 49, 97, 7027.

Photo Gallery

X-15 ablative coat
X-15A-2 ablative coating
Credit: NASA

X-15C 3-view
Credit: © Mark Wade

X15 Delta

1964 February - .

The X-15A-2 delivered to NASA - . Nation: USA. Spacecraft Bus: X-15A. Spacecraft: X-15A-2.
The X-15A-2, modified from the number two aircraft, included among other new features, a 28-in. fuselage extension to carry liquid hydrogen for a supersonic combustion ramjet that was flown (as a dummy) but never tested. It also had external tanks for liquid ammonia and liquid oxygen. These tanks provided roughly 60 seconds of additional engine burn and were used on the aircraft's Mach 6.7 flight.

1964 June 15 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 Carry test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight (X-15A-2 modification).

1964 June 23 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 Stability test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 aborted launch (Stability).

1964 June 25 - . 17:34 GMT - . Launch Site: Edwards. Launch Complex: Hidden Hills DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 Stability test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 25 km (15 mi). Maximum Speed - 4994 kph. Maximum Altitude - 25390 m. First flight of X-15 No. 2 in X-15A-2 configuration, but without drop tanks. Air dropped in Hidden Hills DZ..

1964 August 14 - . 17:54 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003. FAILURE: Nose gear deployed at Mach 4.2..

X-15A-2 Stability test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 31 km (19 mi). Maximum Speed - 5776 kph. Maximum Altitude - 31486 m. Nose landing gear extended at Mach 4.5. Both tires blew on landing. Air dropped in Delamar Dry Lake DZ..

1964 September 29 - . 21:00 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008. FAILURE: Nose gear scoop door causes handling difficulties..

X-15A-2 Stab.,Star tracker test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 29 km (18 mi). Maximum Speed - 5699 kph. Maximum Altitude - 29809 m. Air dropped in Mud Lake DZ..

1964 November 6 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight.

1964 November 16 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight.

1964 November 30 - . 20:09 GMT - . Launch Site: Edwards. Launch Complex: Hidden Hills DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 Gear mod, Stab,ST test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 26 km (16 mi). Maximum Speed - 4970 kph. Maximum Altitude - 26579 m. Air dropped in Hidden Hills DZ..

1965 February 15 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight.

1965 February 15 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight.

1965 February 17 - . 18:44 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008. FAILURE: Landing skid extends at Mach 4.3..

X-15A-2 Stability test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 29 km (18 mi). Maximum Speed - 5649 kph. Maximum Altitude - 28986 m. Right main landing gear extended at Mach 4.1; normal landing. Air dropped in Mud Lake DZ..

1965 April 28 - . 20:26 GMT - . Launch Site: Edwards. Launch Complex: Hidden Hills DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 Landing loads,Stab test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 28 km (17 mi). Maximum Speed - 5266 kph. Maximum Altitude - 28224 m. First star tracker checkout. Air dropped in Hidden Hills DZ..

1965 May 13 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1965 May 18 - . 17:56 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 Stab, landing, ST test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 31 km (19 mi). Maximum Speed - 5697 kph. Maximum Altitude - 31120 m. Air dropped in Mud Lake DZ..

1965 June 4 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1965 June 8 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1965 June 11 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1965 June 22 - . 17:44 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 Stability,ST,gear test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 47 km (29 mi). Maximum Speed - 6336 kph. Maximum Altitude - 47518 m. Air dropped in Delamar Dry Lake DZ..

1965 July 2 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1965 July 8 - . 17:16 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 ST,Landing,Alt test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 64 km (39 mi). Maximum Speed - 5887 kph. Maximum Altitude - 64800 m. Star tracker mission to photograph Gamma Cassiopeia. Air dropped in Delamar Dry Lake DZ..

1965 August 3 - . 20:40 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 RAS,ST,Landing test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 63 km (39 mi). Maximum Speed - 5796 kph. Maximum Altitude - 63612 m. Air dropped in Delamar Dry Lake DZ..

1965 September 2 - . 17:40 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 RAS,ST,Landing test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 73 km (45 mi). X-15 Flight 146 (RAS,ST,Landing) Air dropped in Delamar Dry Lake DZ..

1965 September 22 - . 18:58 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 Infrared Scanner test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 30 km (18 mi). Maximum Speed - 5744 kph. Maximum Altitude - 73091 m. Air dropped in Delamar Dry Lake DZ..

1965 November 3 - . 17:09 GMT - . Launch Site: Edwards. Launch Complex: Cuddeback Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 External Tank test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 21 km (13 mi). First flight with empty external tanks. Ammonia tank recovered; Lox tank destroyed. Maximum Speed - 2414 kph. Maximum Altitude - 21520 m. Air dropped in Cuddeback Dry Lake DZ..

1966 April 13 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1966 April 20 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1966 May 5 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1966 May 18 - . 18:24 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 V-On Stab test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 30 km (18 mi). Maximum Speed - 5936 kph. Maximum Altitude - 30170 m. Air dropped in Mud Lake DZ..

1966 June 27 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 External Tank test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight (External Tank Test).

1966 July 1 - . 19:02 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008. FAILURE: Erroneous failure indication results in emergency landing at Mud Lake..

X-15A-2 External Tank test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 13 km (8 mi). First flight with fueled external tanks. Engine shutdown at 34.6 seconds due to fuel flow anomalies. Maximum Speed - 1646 kph. Maximum Altitude - 13720 m. Air dropped in Mud Lake DZ..

1966 July 20 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1966 July 21 - . 20:02 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 Alt,ST,Abl TPS test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 58 km (36 mi). Maximum Speed - 5741 kph. Maximum Altitude - 58610 m. Air dropped in Delamar Dry Lake DZ..

1966 August 3 - . 16:45 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 ST, Base drag test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 75 km (46 mi). Maximum Speed - 5535 kph. Maximum Altitude - 75890 m. UV photos of stars in Auriga. Air dropped in Delamar Dry Lake DZ..

1966 August 12 - . 18:25 GMT - . Launch Site: Edwards. Launch Complex: Delamar Dry Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003.

X-15A-2 ST,Pitot,Base drag test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 70 km (43 mi). Maximum Speed - 5586 kph. Maximum Altitude - 70440 m. Air dropped in Delamar Dry Lake DZ..

1966 August 30 - . 17:51 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008. FAILURE: SAS system drops out repeatedly, hydrogen peroxide fire in ventral fin..

X-15A-2 V-On,Maurer,TPS Test/Technology/Ultraviolet Astronomy mission - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 31 km (19 mi). Maximum Speed - 5701 kph. Maximum Altitude - 30540 m. Air dropped in Mud Lake DZ..

1966 October 7 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1966 October 19 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1966 November 18 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). Unofficial world's speed record. Maximum Speed - 6838 kph. Maximum Altitude - 30140 m..

1966 November 18 - . 21:24 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 ET/TPS/Maurer/Mach 6 Test/Ultraviolet Astronomy mission - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 30 km (18 mi). X-15 Flight 175 (ET/TPS/Maurer/Mach 6) Air dropped in Mud Lake DZ..

1967 May 5 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1967 May 8 - . 19:27 GMT - . Launch Site: Edwards. Launch Complex: Hidden Hills DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008. FAILURE: Eyelid installed on one window; other window fogs up..

X-15A-2 Ramjet flow test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 29 km (18 mi). Maximum Speed - 5138 kph. Maximum Altitude - 29750 m. Check out of stability and control with ramjet pod. Air dropped in Hidden Hills DZ..

1967 August 7 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52.

X-15A-2 Ramjet flow test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 captive flight (Ramjet flow).

1967 August 11 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 Ramjet flow test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi). X-15 aborted launch (Ramjet flow).

1967 August 16 - . Launch Site: Edwards. Launch Complex: Edwards RW04/22. Launch Pad: Edwards. Launch Platform: NB-52. FAILURE: Failure.

X-15A-2 aborted launch. - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 14 km (8 mi).

1967 August 21 - . 17:59 GMT - . Launch Site: Edwards. Launch Complex: Hidden Hills DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008.

X-15A-2 Ramjet/Hycon/TPS Test/Imaging mission? - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 27 km (16 mi). First test with full ablative coating, ramjet pod. Maximum Speed - 5419 kph. Maximum Altitude - 27740 m. Air dropped in Hidden Hills DZ..

1967 October 3 - . 21:31 GMT - . Launch Site: Edwards. Launch Complex: Mud Lake DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 008. FAILURE: Heat flow from dummy ramjet nearly burns tail off..

X-15A-2 TPS/Ramjet/Mach 6.7 test - . Nation: USA. Agency: NASA, USAF. Spacecraft Bus: X-15A. Spacecraft: X-15A-2. Apogee: 31 km (19 mi). Unofficial world speed record (full ablative coating, dummy ramjet, mechanical eyelid). Maximum Speed - 7273 kph. Maximum Altitude - 31120 m. Air dropped in Mud Lake DZ..

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