Martin Marietta X-24

Martin Marietta X-24
Riik	USA
Rolli	Kontseptsiooni demonstraatorlennuk
Esimene lend	24. oktoober 2000
Ehitatud	2

2007 Martin Marietta X-24 was an American experimental aircraft developed from a joint United States Air Force-NASA program named PILOT (1963–1975). It was designed and built to test lifting body concepts, experimenting with the concept of unpowered reentry and landing, later used by the Space Shuttle. Originally built as the X-24A, the aircraft was later rebuilt as the X-24B. The X-24 was drop launched from a modified B-52 Stratofortress at high altitudes before igniting its rocket engine; after expending its rocket fuel, the pilot would glide the X-24 to an unpowered landing.

Allikas: Martin Marietta X-24 Vikipeedias

Martin X-24B tõstekeha kõnnib ringi
Fotograafid	John Heck, Randy Ray
Lokaliseerimine	USAFi rahvusmuuseum
Fotod	36

Martin X-24B 01

Martin X-24B 02

Martin X-24B 03

Martin X-24B 04

Martin X-24B 05

Martin X-24B 06

Martin X-24B 07

Martin X-24B 08

Martin X-24B 09

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Oodake, otsides Martin Marietta X-24 teile...

Martin X-24A tõstekeha kõnnib ringi
Fotograafid	John Heck, Randy Ray
Lokaliseerimine	USAFi rahvusmuuseum
Fotod	34

Martin X-24A tõstekeha

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General Characteristics and Role

The Martin Marietta X-24B was an experimental aircraft developed from the earlier X-24A under a joint U.S. Air Force–NASA program (PILOT, 1963–1975). Its primary role was to test the concept of a lifting body: a wingless vehicle whose fuselage shape generates the aerodynamic lift necessary for flight. The X-24B was a major redesign of the bulbous X-24A, converting its shape into what was described as a “flying flatiron”—rounded top, flat bottom, and a sharp, double-delta planform. The goal was to prove that future reusable spacecraft could successfully reenter the atmosphere and perform an unpowered, precise gliding landing on a conventional runway, information that was crucial to the design of the Space Shuttle.

Property	Typical Value (X-24B)
Rolli	Experimental Lifting Body (Reentry/Landing Research)
National Origin	Ameerika Ühendriigid
Tootja	Martin Marietta Corporation
First Flight (X-24B)	1 August 1973 (Glide)
Meeskonna	1 Pilot
pikkus	11.43 m (37 ft 6 in)
Tiibade siruulatus	5.79 m (19 ft 0 in)
kõrgus	2.92 m (9 ft 7 in)
Maximum Takeoff Weight	6,260 kg (13,800 lb)

Powerplant and Performance

Engine: 1 x Reaction Motors XLR-11-RM-13 4-chamber liquid-fuelled rocket engine.
Thrust: Approximately 37.7 kN (8,480 lbf).
Launch Method: The X-24B was air-launched from a modified B-52 Stratofortress at an altitude of approximately 45,000 feet (13,700 m).
Maximum Speed: Mach 1.76 (1,873 km/h or 1,164 mph).
Service Ceiling: 22,590 m (74,130 ft).
Landing System: Unpowered glide landing, using its shape to generate lift and relying on the pilot’s precise maneuvers to reach a predetermined landing spot.

Program Outcome and Legacy

Key Achievement: The X-24B completed 36 flights. Its most pivotal missions were two precise unpowered landings made on the main concrete runway at Edwards Air Force Base in 1975 (other flights landed on dry lakebeds).
Space Shuttle Influence: These precision landings were the final, crucial step in the lifting body program, convincing NASA that the Space Shuttle orbiter could safely and routinely perform unpowered landings without needing heavy, expensive jet engines for a second chance at approach.
Design Evolution: The X-24B’s highly stable “flying flatiron” shape was the final, most efficient configuration tested in the long-running lifting body program.
Retirement: The program concluded in 1975. The X-24B is now displayed at the National Museum of the United States Air Force in Ohio.

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