Tag Archives: Flight Test

14 February 2012

Boeing YAL-1A, 00-0001, Airborne Laser Test aircraft, departing Edwards AFB, 14 February 2012. (U.S. Air Force)
Boeing YAL-1A, 00-0001, Airborne Laser Test Aircraft, departing Edwards AFB, 14 February 2012. (U.S. Air Force)
Terrier Black Brant IX two-stage sounding rocket. (NASA)
Terrier Black Brant IX two-stage sounding rocket. (NASA)

14 February 2012: Boeing YAL-1A Airborne Laser Test Bed, serial number 00-0001, departed Edwards AFB for the last time as it headed for The Boneyard at Davis-Monthan Air Force Base, Tucson, Arizona.

The Boeing YAL-1A was built from a 747-4G4F, a converted 747-400F freighter, serial number 30201, formerly operated by Japan Air Lines and registered JA402J. It carried two solid state lasers and a megawatt-class oxygen iodine directed energy weapon system (COIL).

On 3 February 2010, it destroyed a Terrier Black Brant two-stage sounding rocket in the boost phase as it was launched from San Nicolas Island, off the coast of Southern California.

Boeing YAL-1A 00-0001, Airborne Laser test aircraft, in flight. The laser aiming turret is directed toward the photo aircraft. (U.S. Air Force)
Boeing YAL-1A 00-0001, Airborne Laser Test Aircraft, in flight. The laser aiming turret is directed toward the photo aircraft. (U.S. Air Force)

The 747-400 was a major development of the 747 series. It had many structural and electronics improvements over the earlier models, which had debuted 18 years earlier. New systems, such as a “glass cockpit”, flight management computers, and new engines allowed it to be flown with a crew of just two pilots, and the position of Flight Engineer became unnecessary.

The most visible features of the –400 are its longer upper deck and the six-foot tall “winglets” at the end of each wing, which improve aerodynamic efficiency be limiting the formation of wing-tip vortices.

The Boeing 747-400F is the freighter version of the 747-400 airliner. It has a shorter upper deck, no passenger windows and the nose can swing upward to allow cargo pallets or containers to be loaded. It is 231 feet, 10 inches (70.663 meters) long with a wingspan of 211 feet, 5 inches (64.440 meters) and overall height of 63 feet, 8 inches (19.406 meters). Empty weight is 394,100 pounds (178,761 kilograms). Maximum takeoff weight (MTOW) is 875,000 pounds (396,893 kilograms).

The YAL-1A was powered by four General Electric CF6-80C2B5F turbofan engines, producing 62,100 pounds of thrust (276.235 kilonewtons), each. The CF6-80C2B5F is a two-spool, high-bypass-ratio turbofan engine. It has a single-stage fan section, 18-stage compressor (4 low- and 14 high-pressure stages) and 7-stage turbine section (2 high- and 5 low-pressure stages). The fan diameter is 7 feet, 9.0 inches (2.362 meters). The engine is 13 feet, 4.9 inches (4.087 meters) long with a maximum diameter of 8 feet, 10.0 inches (2.692 meters). It weighs 9,760 pounds (4,427 kilograms).

It had a cruise speed of 0.84 Mach (555 miles per hour, 893 kilometers per hour) at 35,000 feet (10,668 meters) and maximum speed of 0.92 Mach (608 miles per hour, 978 kilometers hour). Maximum range at maximum payload weight is 7,260 nautical miles (13,446 kilometers).

Boeing YAL-1A in storage at Davis-Monthan Air Force Base, 27 August 2014. The airframe was disassembled and finally broken up 25 September 2014. (Soracat)

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

9 February 1969

The prototype Boeing 747, N7470, City of Everett, takes off at Paine Field, 9 February 1969. (Boeing/The Museum of Flight)
The prototype Boeing 747, N7470, City of Everett, takes off at Paine Field, 9 February 1969. (The Museum of Flight)

9 February 1969: At 11:34 a.m., Boeing Chief Test Pilot Jack Wadell, with Engineering Test Pilots Brien Singleton Wygle, co-pilot, and Jesse Arthur Wallick, flight engineer, took off from Paine Field, Everett, Washington, aboard RA001, the prototype Boeing 747-121, FAA registration N7470, and made a 1 hour, 15 minute test flight. The ship was named City of Everett after the home of the factory where it was built.

The test pilots who flew the first Boeing 747: Brien Wygle, Jack Waddell and Jess Wallick. (Seattle Times)
The test pilots who flew the first Boeing 747:  Left to right, Brien S. Wygle, Jack Waddell and Jesse A. Wallick. (Seattle Times)

The 747 was the first “wide body” airliner and was called a “jumbo jet”. It is one of the most widely used airliners and air freighters in service world-wide, and is still in production after 45 years. The latest version is the 747-8, the “Dash Eight.” As of December 2012, Boeing had built 1,458 747s.

Boeing 747-121 RA001, City of Everett, 9 February 1969. A Canadair CL-13B Sabre Mk.6, N8686F, is the chase plane, flown by test pilot Paul Bennett. (Boeing)
Boeing 747-121 RA001, City of Everett, 9 February 1969. A Canadair CL-13B Sabre Mk.6, N8686F, is the chase plane, flown by test pilot Paul Bennett. (Boeing/The Seattle Times)

The 747-100 series was the first version of the Boeing 747 to be built. It was operated by a flight crew of three and was designed to carry 366 to 452 passengers. It is 231 feet, 10.2 inches (70.668 meters) long with a wingspan of 195 feet, 8 inches (59.639 meters) and overall height of 63 feet, 5 inches (19.329 meters). The interior cabin width is 20 feet (6.096 meters), giving it the name “wide body.” Its empty weight is 370,816 pounds (168,199 kilograms) and the Maximum Takeoff Weight (MTOW) is 735,000 pounds (333,390 kilograms).

Boeing flight crew (Image courtesy of Neil Corbett, Test and research Pilots, Flight Test Engineers)
Boeing 747 RA001 flight crew, left to right, Jack Wadell, Brien Wygle and Jess Wallick. (Image courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

The 747-100 is powered by four Pratt & Whitney JT9D-7A high-bypass ratio turbofan engines. The JT9D is a two-spool, axial-flow turbofan engine with a single-stage fan section, 14-stage compressor (11 high- and 3 low-pressure stages) and 6-stage turbine (2 high- and 4 low-pressure stages). The engine is rated at 46,950 pounds of thrust (208.844 kilonewtons), or 48,570 pounds (216.050 kilonewtons) with water injection (2½-minute limit). This engine has a maximum diameter of 7 feet, 11.6 inches (2.428 meters), is 12 feet, 10.2 inches (3.917 meters) long and weighs 8,850 pounds (4,014 kilograms).

The 747-100 has a cruise speed of 0.84 Mach (555 miles per hour, 893 kilometers per hour) at 35,000 feet (10,668 meters). The maximum certificated operating speed is 0.92 Mach. The airliner’s maximum range is 6,100 miles (9,817 kilometers).

Boeing 747 RA001, City of Everett. (The Museum of Flight)
Boeing 747 RA001, City of Everett. (The Museum of Flight)

The Boeing 747 has been in production for 48 years. More than 1,520 have been delivered to date. 205 of these were the 747-100 series. The U.S. Air Force has selected the Boeing 747-8 as the next presidential transport aircraft.

City of Everett last flew in 1995. It is on static display at The Museum of Flight, Boeing Field, Seattle, Washington. A cosmetic restoration is underway. Online donations to help cover the expenses are being accepted. See:

https://www.museumofflight.org/forms/donate/

Boeing 747, RA001 Boeing Photo Number K16491
Boeing 747 RA001, City of Everett, at The Museum of Flight. (Boeing)

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

5 January 1956

Piasecki YH-16A-PH Transporter 50-1270 hovers in ground effect.
Piasecki YH-16A-PH Transporter 50-1270 hovers in ground effect. (Piasecki Aircraft Corporation)

5 January 1956: The prototype Piasecki Helicopter Company YH-16A-PH Transporter twin-turboshaft, tandem-rotor helicopter, serial number 50-1270, was returning to Philadelphia from a test flight, when, at approximately 3:55 p.m., the aft rotor desynchronized, collided with the forward rotor and the aircraft broke up in flight. It crashed at the Mattson Farm on Oldman’s Creek Road, near Swedesboro, New Jersey, and was completely destroyed.

Test pilots Harold W. Peterson and George Callahan were killed.

It was determined that a bearing associated with an internal coaxial shaft supporting test data equipment had seized, causing the rotor shaft to fail.

Harold W. Peterson (left) and George Callahan, with the prototype Piasecki YH-16A Turbo Transporter, 50-1270. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Harold W. Peterson (left) and George Callahan, with the prototype Piasecki YH-16A Turbo Transporter, 50-1270. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

At the time, the YH-16 was the largest helicopter in the world. The United States Air Force intended it as a very-long-range rescue helicopter, while the U.S. Army expected it to serve as a heavy lift cargo and troop transport.

YH-16 50-1269 was powered by two 2,181.2-cubic-inch-displacement (35.74 liter) air-cooled, supercharged Pratt & Whitney Twin Wasp E2 (R-2180-11) two-row, fourteen-cylinder radial engines with a Normal Power Rating of 1,300 horsepower at 2,600 r.p.m. at 8,000 feet ( meters), and 1,650 horsepower at 2,600 rp.m., for Takeoff.

The second YH-16A, 50-1270, was modified while under construction and was powered by two Allison Division YT38-A-10 turboshaft engines which produced 1,800 shaft horsepower, each. This made the YH-16A the world’s first twin-engine turbine-powered helicopter.

The Piasecki YH-16A Transporter was the world's largest helicopter in 1956. (Piasecki Aircraft Corporation)
The Piasecki YH-16A Transporter was the world’s largest helicopter in 1956. (Piasecki Aircraft Corporation)

The YH-16A had a fuselage length of 78 feet (23.774 meters), and both main rotors were 82 feet (24.994 meters) in diameter. With rotors turning, the overall length was 134 feet ( meters). Their operating speed was 125 r.p.m. Overall height of the helicopter was 25 feet (7.62 meters). The helicopter’s empty weight was 22,506 pounds (10,209 kilograms) and the gross weight was 33,577 pounds (15,230 kilograms).

The cruise speed of the YH-16A was 146 miles per hour (235 kilometers per hour). In July 1955, Peterson and Callahan had flown 50-1270 to an unofficial record speed of 165.8 miles per hour (266.83 kilometers per hour). The service ceiling was 19,100 feet (5,822 meters) and the maximum range for a rescue mission was planned at 1,432 miles (2,305 kilometers).

After the accident, the H-16 project was cancelled.

Prototype Piasecki YH-16A Transporter 50-1270, hovering in ground effect at Philadelphia Airport, 1955. (Piasecki Aircraft Corporation)
Prototype Piasecki YH-16A Transporter 50-1270, hovering in ground effect at Philadelphia Airport, 1955. (Piasecki Aircraft Corporation)

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

22 December 1954

Captain Richard James Harer, United States Air Force. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Captain Richard James Harer, United States Air Force. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

22 December 1954: At Edwards Air Force Base in the high desert of southern California, test pilot Captain Richard James Harer was flying a Lockheed F-94C-1-LO Starfire, serial number 50-962.¹ Harer was accompanied by fellow test pilot Captain Milburn G. Apt in a chase plane.

Lockheed F-94C-1-LO Starfire 50-966, the same type airplane flown by Captain Richard Harer, 22 December 1954, is accompanied by Lockheed F-80C-1-LO Shooting Star 47-176 chase plane. (Lockheed)
Lockheed F-94C-1-LO Starfire 50-966, an all-weather interceptor of the same type flown by Captain Richard J. Harer, 22 December 1954. The Starfire is accompanied by a Lockheed F-80C-1-LO Shooting Star chase plane, 47-176. (Lockheed Martin)

The Lockheed F-94 was the first U.S. production fighter aircraft to be equipped with a drag chute to provide aerodynamic braking on landing. (Drag chutes had been in use on larger aircraft since the 1930s.) There was speculation that the sudden deceleration provided by a drag chute might be useful during air-to-air combat.

Captain Harer’s test flight was to determine what would happen when the drag chute opened while the airplane was traveling at 600 miles per hour (96 kilometers per hour).

In this scene from the motion picture "Toward The Unknown" (Toluca Productions, 1956) which starred William Holden and Lloyd Nolan in a story about test pilots at Edwards Air Force Base, a Lockheed F-94C Starfire has released a drag chute in flight, simulating Captain Richard Harer's test flight of 22, December 1954.
In this scene from the motion picture “Toward The Unknown” (Toluca Productions, 1956) which starred William Holden and Lloyd Nolan in a story about test pilots at Edwards Air Force Base, a Lockheed F-94C Starfire has released a drag chute in flight, simulating Captain Richard J. Harer’s test flight of 22 December 1954. (Warner Brothers)

 LIFE Magazine described the test in the following excerpt:

LIFE Magazine, 18 June 1956. . . A captain named Richard J. Harer was assigned to make the test in an F-94C, capable of flying 600 miles an hour. The plane was equipped with a manual release, so Harer could get rid of the parachute after the test. In the event that the manual release failed, Harer could get rid of the parachute by detonating a small explosive charge which was wired to the rope that secured the parachute to the plane. If both of these devices failed, Harer could still get rid of the parachute by going into a dive and maneuvering the parachute into the blast of flame from his afterburner. In sum, a thoughtful arrangement of affairs. Harer got into his plane and took it up to 20,000 feet, closely followed by a chase aircraft flown by another captain named Milburn Apt. Harer opened the parachute, began to tumble crazily across the sky and then—as far as anyone knows—must have tried the manual release. It failed. Then, because he was a cool, skillful pilot, Harer must have kept his head and tried the explosive charge, although no one is sure what he did. In any case, the charge did not explode. By this time Harer was plummeting out of control toward the dry lake bed at perhaps 500 miles an hour, with Captain Apt flying right beside him shouting advice over the radio. Harer’s plane continued down, wallowing, gyrating, the deadly parachute never quite getting into the flame of the afterburner. Harer crashed. His plane burst into flames.

Lockheed F-94C-1-LO Starfire 50-1041 deploys its drogue chute on touchdown. (U.S. Air Force)
Lockheed F-94C-1-LO Starfire 50-1041 deploys its drag chute on touchdown. (U.S. Air Force)

Captain Apt landed on the lake bed at almost the instant of the crash. The two planes, one burning, one under control, skidded along beside each other. As soon as he came to a halt, Apt leaped out of his plane and ran over to Harer’s. “It was nothing but fire,” Apt remembers. “The only part of the plane I could see sticking out of the flames was the tip of the tail.”

Apt dashed around to the other side of Harer’s plane. Strangely, this side was not burning. Apt was able to climb up onto the plane and look through the Plexiglas canopy into the cockpit. It was filled with smoke, but he could see Harer inside, feebly, faintly moving his head. Apt grabbed the canopy release, a device on the outside of the plane designed for just such and emergency. It failed.

Lockheed F-94C-1-LO Starfire 50-1034 with its drogue chute deployed for aerodynamic braking on landing. (U.S. Air Force)
Lockheed F-94C-1-LO Starfire 50-1034 with its drag chute deployed for aerodynamic braking on landing. (U.S. Air Force)

The dry lake bed has absolutely nothing on its surface except the fine-grained sand of which it is composed. No sticks, no stones, nothing that Apt might have picked up to smash the canopy. He tried to pry it off with his bare hands, an effort that, had it not been for the circumstances, would have been ludicrous. He smashed it with his fists and succeeded only in injuring himself. Meanwhile he could see Harer inside, the fire beginning to get to him now.

Captain Richard J. Harer's Lockheed F-94C-1-LO Starfire, 50-962. The airplane has an air data boom mounted on teh nose for flight testing, and carries jettisonable fuel tanks under its wings. (U.S. Air Force photograph via Million Monkey Theatre)
Captain Richard J. Harer’s Lockheed F-94C-1-LO Starfire, 50-962. The airplane has an air data boom mounted on the nose for flight testing, and carries jettisonable fuel tanks under its wings. (U.S. Air Force photograph via Million Monkey Theater)

As Captain Apt smashed his fists on the canopy, a single jeep raced across the lake bed toward the plane at 70 miles an hour. Reaching the plane, the driver leaped out and ran over to it, carrying the only useful piece of equipment he had: a five-pound brass fire extinguisher, the size of a rolling pin. He could as well have tried to put out the fire by spitting on it. Apt and the jeep driver shouted contradictory instructions at each other above the growing roar of the fire. The jeep driver emptied his extinguisher on the forward part of the plane, then handed the empty container to Apt. Apt raised it above his head and smashed it down on the canopy. It bounced off. He pounded the canopy again and again, as hard as he could, and each time the extinguisher bounced off. “It was like hitting a big spring,” he says forlornly. “I couldn’t break it.”

Meanwhile, 9,950 men on the base quietly pursued their jobs, unaware of the accident. The obstetrician said, “Come back Thursday, Mrs. Smith,” Robert Hawn worked on his YAPS, and Smith, Douglas S., changed a tire. The only immediate spectators, aside from Apt and the jeep driver, were the Joshua trees growing all along the edge of the lake bed, very old and mournful.

By this time Captain Harer’s flesh was on fire. The jeep driver dashed back to his vehicle and returned with a five-gallon gasoline can. “My God.” Apt thought. “No, no,” the jeep driver cried, “it’s full of water. It’s all right.”

Apt hefted the can, which weighed nearly 50 pounds. He raised it high in the air and smashed it down. The canopy cracked. Apt hit it again, opening a hole in it, letting out the smoke inside. In a few seconds he had broken a large jagged opening through which Harer could be pulled out. “It was a tough job,” Apt says. “Harer was a very tall man.” Was a tall man. Not is, but was.

“He’s not tall now,” Apt says. “Both his feet were burned off.” Captain Harer lived. Today, he gets around very well on his artificial feet. He has been promoted to major and will soon be honorably retired from the Air Force with a pension. He has no memory whatever of the accident. He recalls flying at 20,000 feet and popping open the parachute, and his next memory is of awakening in a hospital two weeks later. . . .

Excerpted from “10,000 Men to a Plane,” LIFE Magazine, 18 June 1956.

Captain Milburn Grant Apt, United States Air Force, with a Lockheed T-33A Shooting Star. (LIFE Magazine)
Captain Milburn Grant Apt, United States Air Force, with a Lockheed T-33A Shooting Star at Edwards Air Force Base, 1956. (LIFE Magazine via Jet Pilot Overseas)
Soldier's Medal
The Soldier’s Medal

For his heroism in the face of great danger, Captain Mel Apt was awarded the Soldier’s Medal, the highest award for valor in a non-combat mission for Army and Air Force personnel.  The regulation establishing the award states, “The performance must have involved personal hazard or danger and the voluntary risk of life under conditions not involving conflict with an armed enemy. Awards will not be made solely on the basis of having saved a life.”

Mel Apt would continue as a test pilot at Edwards Air Force Base, and on 26 September 1956, he would be the first pilot to exceed Mach 3 when he flew the Bell X-2 rocketplane to Mach 3.196 (2,094 miles per hour/3,377 kilometers per hour) at 65,589 feet (19,992 meters). Just seconds later, the X-2 began uncontrolled oscillations and came apart. Mel Apt was unable to escape from the cockpit and was killed when the X-2 hit the desert floor. He was the thirteenth test pilot to be killed at Edwards since 1950.

¹ Several sources list the U.S. Air Force serial number of the F-94C flown by Captain Harer as “50-692,” however that serial number is actually assigned to a Boeing C-97C-35-BO Stratofreighter four-engine medical transport. It is apparent that the numbers have been transposed.

© 2016, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

17 December 1903, 10:35 a.m.

Orville Wright at the controls of the Flyer, just airborne on its first flight at Kill Devil Hills, North Carolina, 17 December 1903. Wilbur Wright is running along to stabilize the wing. This photograph was taken by John T. Daniels, using the Wright Brothers’ Gundlach Optical Company Korona-V camera. (Library of Congress Prints and Photographs Division LC-)

17 December 1903, 10:35 a.m.: Orville and Wilbur Wright, two brothers from Dayton, Ohio, had been working on the development of a machine capable of flight since 1899. They started with kites and gliders before moving on to powered aircraft. At the Kill Devil Hills near Kitty Hawk, North Carolina, they made the first successful flight of a powered, controllable airplane. Orville was at the controls of the Flyer while Wilbur ran along side, steadying the right wing. The airplane flew 120 feet (36.6 meters) in 12 seconds.

Three more flights were made that day, with the brothers alternating as pilot. Wilbur made the last flight, covering 852 feet (263.7 meters) in 59 seconds. The Flyer was slightly damaged on landing but before it could be repaired for an intended flight four miles back to Kitty Hawk, a gust of wind overturned the airplane and caused more extensive damage. It never flew again.

Wright Flyer, front view. (Wright Brothers Aeroplane Company)
Wright Flyer, front view. (Wright Brothers Aeroplane Company)

The Wright 1903 Flyer is a canard biplane, with elevators to the front and rudders at the rear. The flight controls twisted, or “warped,” the wings to cause a change in direction.  The pilot lay prone in the middle of the lower wing, on a sliding “cradle.” He slid left and right to shift the center of gravity. Wires attached to the cradle acted to warp the wings and move the rudders. The airplane is built of spruce and ash and covered with muslin fabric. It is 21 feet (6.401 meters) long with a wingspan of 40 feet, 4 inches (12.293 meters) and overall height of 9 feet, 3 inches (2.819 meters).

Wright Flyer, left profile. (Wright Brothers Aeroplane Company)
Wright Flyer, right profile. (Wright Brothers Aeroplane Company)

Power is supplied by a 201.06-cubic-inch-displacement (3.295 liter) water-cooled inline 4-cylinder gasoline engine producing 12 horsepower at 1,090 r.p.m. The engine was built by the Wright’s mechanic, Charlie Taylor. It uses cast iron cylinders and an aluminum crankcase. Two 8-foot diameter (2.4 meter) two-bladed wooden propellers, in pusher configuration, are turned in opposite directions at 350 r.p.m. by a chain-and-sprocket drive from the engine. The Flyer weighs 605 pounds (274.4 kilograms).

The Wright's airfield at Kittyhawk, North Carolina. Wilbure Wright is standing in the hangar. (Wright Brothers Aeroplane Company)
The Wright’s airfield near Kittyhawk, North Carolina. Wilbur Wright is standing in the hangar. (Wright Brothers Aeroplane Company)

In 1928, the Wright Flyer was shipped to England where it was displayed at the Science Museum on Exhibition Road, London. It returned to the United States in 1948 and was placed in the collection of the Smithsonian Institution.

Wilbur Wright died of typhoid fever in 1912. Orville continued to fly until 1918. He served as a member of the National Advisory Committee on Aeronautics (NACA, predecessor of NASA) for 28 years. He died in 1948.

The 1903 Wright Flyer at the Smithsonian Institution. (Photo by Eric Long, National Air and Space Museum, Smithsonian Institution)
The 1903 Wright Flyer at the Smithsonian Institution. (Photo by Eric Long, National Air and Space Museum, Smithsonian Institution)

© 2016, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather