Tag Archives: NACA High-Speed Flight Station

27 September 1956

Aviation, , , , , , , , , , , , , , , , , ,
Captain Milburn G. Apt, U.S. Air Force, with a Bell X-2. (U.S. Air Force)
Captain Milburn Grant Apt, United States Air Force, with a Bell X-2. (U. S. Air Force)

27 September 1956: Captain Milburn G. (“Mel”) Apt, United States Air Force, was an experimental test pilot assigned to the Air Force Flight Test Center at Edwards Air Force Base, California. After Frank Everest and Iven Kincheloe had made twelve powered flights in the Bell X-2 supersonic research aircraft, Mel Apt was the next test pilot to fly it.

The X-2 was a joint project of the U.S. Air Force and NACA (the National Advisory Committee on Aeronautics, the predecessor of NASA). The rocketplane was designed and built by Bell Aircraft Corporation of Buffalo, New York, to explore supersonic flight at speeds beyond the capabilities of the earlier Bell X-1 and Douglas D-558-II Skyrocket.

In addition to the aerodynamic effects of speeds in the Mach 2.0–Mach 3.0 range, engineers knew that the high temperatures created by aerodynamic friction would be a problem, so the aircraft was built from stainless steel and K-Monel, a copper-nickel alloy.

The Bell Aircraft Corporation X-2 was 37 feet, 10 inches (11.532 meters) long with a wingspan of 32 feet, 3 inches (9.830 meters) and height of 11 feet, 10 inches (3.607 meters). Its empty weight was 12,375 pounds (5,613 kilograms) and loaded weight was 24,910 pounds (11,299 kilograms).

Bell X-2 46-675 on its transportation dolly at Edwards Air Force Base, California, 1952. (NASA)
The second of two Bell X-2 supersonic research rocketplanes, 46-675, on its transportation dolly at Edwards Air Force Base, California, 1952. On 12 May 1953 this X-2 exploded during a captive test flight, killing Bell’s test pilot Jean L. “Skip” Ziegler. (NASA)

The X-2 was powered by a throttleable two-chamber Curtiss-Wright XLR25-CW-1 rocket engine that produced 2,500–15,000 pounds of thrust (11.12–66.72 kilonewtons)

Rather than use its limited fuel capacity to take off and climb to altitude, the X-2 was dropped from a modified heavy bomber as had been the earlier rocketplanes. A four-engine Boeing B-50D-95-BO Superfortress bomber, serial number 48-096, was modified as the drop ship and redesignated EB-50D.

The launch altitude was 30,000 feet (9,144 meters). After the fuel was exhausted, the X-2 glided to a touchdown on Rogers Dry Lake at Edwards Air Force Base.

Bell X-2 46-674 after drop from Boeing EB-50D Superfortress 48-096. (U.S. Air Force)
Bell X-2 46-674 after drop from Boeing EB-50D Superfortress 48-096. (U.S. Air Force)

With Mel Apt in the cockpit on his first rocketplane flight, the B-50 carried the X-2 to 31,800 feet (9,693 meters). After it was dropped from the bomber, Apt ignited the rocket engine and began to accelerate. He passed Mach 1 at 44,000 feet (13,411 meters) and continued to climb. Apt flew an “extraordinarily precise profile” to reach 72,200 feet (22,007 meters) where he put the X-2 into a dive. The rocket engine burned 12.5 seconds longer than planned, and at 65,589 feet (19,992 meters) the X-2 reached Mach 3.196 (2,094 miles per hour, 3,377 kilometers per hour).

Milburn Apt was the first pilot to exceed Mach 3. He was The Fastest Man Alive.

Bell X-2 46-674 in flight over Southern California, 1955–56. Note the supersonic diamond-shaped shock waves in the rocket engine's exhaust. (Bell aircraft Corporation)
Bell X-2 46-674 in flight over Southern California, 1955–56. Note the supersonic diamond-shaped shock waves in the rocket engine’s exhaust. (Bell Aircraft Corporation)

It was known that the X-2 could be unstable in high speed maneuvers. The flight plan called for Apt to slow to Mach 2.4 before beginning a gradual turn back toward Rogers Dry Lake where he was to land, but he began the turn while still at Mach 3. Twenty seconds after engine burn out, the X-2 began to oscillate in all axes and departed controlled flight. His last radio transmission was, “There she goes.” ¹

Mel Apt was subjected to acceleration forces of ± 6 Gs. It is believed that he was momentarily unconscious. Out of control, the X-2 fell through 40,000 feet (12,192 meters) in an inverted spin. Apt initiated the escape capsule separation, in which the entire nose of the X-2 was released from the airframe. It pitched down violently and Mel Apt was knocked unconscious again. He regained consciousness a second time and tried to parachute from the escape capsule, but was still inside when it hit the desert floor at several hundred miles per hour. Mel Apt was killed instantly.

Since 1950, Milburn G. Apt was the thirteenth test pilot killed at Edwards Air Force Base.

Wreckage of the Bell X-2, 46-674. (U.S. Air Force)
Wreckage of the Bell X-2, 46-674, in the Kramer Hills, east of Edwards Air Force Base. (U.S. Air Force)
Wreckage of the Bell X-2, 46-674. (NASM 9A08208)

Milburn Grant Apt was born at Buffalo, Kansas, 8 April 1924. He was the third child of Oley Glen Apt, a farmer, and Ada Willoughby Apt.

“Mel” Apt enlisted as a private in the Air Corps Enlisted Reserve, United States Army, 9 November 1942. On 23 June 1943, Private Apt was appointed an Aviation Cadet. After completing flight training, Cadet Apt was commissioned a Second Lieutenant, Army of the United States (A.U.S.). He was promoted to First Lieutenant, A.U.S., 4 September 1945. Apt was released from active duty on 11 August 1946. On 10 October 1947, he was reclassified as a Second Lieutenant, Air Corps, United States Army, with date of rank 8 April 1945.

In February 1950, Lieutenant Apt, then stationed at Williams Air Force Base, Arizona, married Miss Faye Lorrie Baker of Phoenix. They would have two children.

Mel Apt earned a Bachelor of Science degree from the University of Kansas, Lawrence, Kansas, in 1951, and a second bachelor’s degree in aeronautical engineering from the Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio. He then attended the U.S. Air Force Experimental Test Pilot School at Edwards Air Force Base, California, graduating in September 1954. Apt was assigned to the Fighter Operations Branch, Air Force Flight Test Center, as a test pilot.

On 22 December 1954, Captain Apt was flying a chase plane during a test at Edwards. The test aircraft crash-landed on the dry lake and caught fire with its pilot trapped inside. Mel Apt, with his bare hands, rescued the other test pilot, saving his life. For this courageous act, he was awarded the Soldier’s Medal.

Captain Apt was posthumously awarded the Distinguished Flying Cross for his flight in the X-2. The medal was presented to his widow in a ceremony at Edwards in March 1957.

Captain Milburn Grant Apt, United States Air Force, was 32 years old at the time of his death. His remains were buried at the Buffalo Cemetery, Buffalo, Kansas.

Captain Iven Carl Kincheloe and Captain Milburn Grant Apt (seated in cockpit) with the Bell X-2 at Edwards Air Force Base, 1956. (Jet Pilot Overseas)

¹ Recommended: Coupling Dynamics in Aircraft: A Historical Perspective, by Richard E. Day, Dryden Flight Research Center, Edwards AFB, California NASA Special Publications 532, 1997.

© 2018, Bryan R. Swopes

8 September 1954

Aviation, , , , , , , , , , , , ,
Albert Scott Crossfield, NACA Test Pilot. (LIFE Magazine via Jet Pilot Overseas)
Albert Scott Crossfield, NACA Test Pilot. (Allan Grant/LIFE Magazine)

8 September 1954: Scott Crossfield, a NACA Aeronautical Research Pilot at the High Speed Flight Station, Edwards Air Force Base, California, took the North American Aviation F-100A-5-NA Super Sabre, 52-5778, on its first NACA test flight—and his first flight in an F-100.

Tests of the prototype and early production Super Sabres revealed directional stability problems, a very dangerous inertia coupling characteristic that could cause the aircraft to go violently out of control (and which would result in the death of North American’s chief test pilot, George Welch, in just another three weeks). The highly swept wings could stall at high angles of attack, causing the airplane to pitch up in the deadly “Sabre dance.” NACA wanted to explore the causes of these aerodynamic problems and design solutions.

Scott Crossfield pre-flights a North American Aviation F-100A Super Sabre. Note the extended leading-edge "slats". (LIFE Magazine via Jet Pilot Overseas.)
Scott Crossfield pre-flights a North American Aviation F-100A Super Sabre. Note the extended leading-edge “slats”. (Allan Grant/LIFE Magazine)

During the flight there was an engine fire warning and Crossfield shut down the Pratt & Whitney J57-P-7 turbojet engine. The F-100A had no flaps and North American’s own test pilots did not think a “dead stick” landing was possible due the very high landing speed required.

Scott Crossfield signs the maintenance forms for an F-100, certifying the airplane ready for flight. (LIFE Magazine via Jet Pilot Overseas)
Scott Crossfield signs the maintenance forms for an F-100, certifying the airplane ready for flight. (Allan Grant/LIFE Magazine)

Scott Crossfield tells the story in his autobiography:

. . . As a matter of fact, North American tests pilots were then flipping coins to see who would bring an F-100 in dead-stick to fulfill a requirement of the Air Force acceptance tests. I was not concerned. Dead-stick landings in low L-over-D [Lift-over-Drag] airplanes were my specialty. Every test pilot develops a strong point. I was certain that my talent lay in dead-stick landings.

With the engine idling and generating no energy to the plane’s systems, I was running out of hydraulic pressure to operate the controls. Following the handbook instructions, I pulled a lever which extended a miniature “windmill” into the slipstream. This “windmill” churned, building up pressure in the hydraulic lines. Unknown to me, there was a major leak in the line. The windmill was not helping, but hurting me. It was pumping hydraulic fluid overboard as fast as it could turn.

Scott Crossfield climbs into the cockpit of a North American Aviation F-100A-5-NA Super Sabre. (LIFE Magazine via Jet Pilot Overseas)
Scott Crossfield climbs into the cockpit of a North American Aviation F-100A-5-NA Super Sabre. (Allan Grant/LIFE Magazine)

I called Edwards tower and declared an emergency. All airborne planes in the vicinity of the base were warned away from the lake area. I held the ailing F-100 on course, dropping swiftly, following the glide path that I used for the dead-stick Skyrocket. [Douglas D-558-II Skyrocket] I flared out and touched down smoothly. It was one of the best landings I have ever made, in fact. Seconds later, while the F-100 was rolling out, the remaining bit of hydraulic pressure in the control lines drained out and the controls froze.

I then proceeded to violate a cardinal rule of aviation: never try tricks with a compromised airplane. The F-100 was still rolling at a fast clip, coming up fast on the NACA ramp, when I made my poor decision. I had already achieved the exceptional, now I would end it with a flourish, a spectacular wind-up. I would snake the stricken F-100 right up the ramp and bring it to a stop immediately in front of the NACA hangar. This trick, which I had performed so often in the Skyrocket, was a fine touch. After the first successful dead-stick landing in an F-100, it would be fitting.

Instrument panel of a North American Aviation F-100 Super Sabre. (U.S. Air Force)
Instrument panel of a North American Aviation F-100 Super Sabre. The fire warning light and hydraulic pressure gauge are at the upper right corner. (U.S. Air Force)

According to the F-100 handbook, the hydraulic brake system—a separate hydraulic system from the controls—was good for three “cycles,” engine out. This means three pumps on the brake, and that proved exactly right. The F-100 was moving at about fifteen miles an hour when I turned up the ramp. I hit the brakes once, twice, three times. The plane slowed, but not quite enough. I was still inching ahead ponderously, like a diesel locomotive. I hit the brakes a fourth time—and my foot went clear to the floorboards. The hydraulic fluid was exhausted. The F-100 rolled on, straight between the yawning hangar doors!

The good Lord was watching over me—partially anyhow. The NACA hangar was then crowded with expensive research tools—the Skyrocket, all the X-1 series, the X-3, X-4 and X-5. Yet somehow, my plane, refusing to halt, squeezed by them all and bored steadily on toward the side wall of the hangar.


The nose of the F-100 crunched through the corrugated aluminum, punching out an eight-inch steel I-beam. I was lucky. Had the nose bopped three feet to the left or right, the results could have been catastrophic. Hitting to the right, I would have set off the hangar fire-deluge system, flooding the hangar with 50,000 barrels of water and ruining all the expensive airplanes. Hitting to the left, I would have dislodged a 25-ton hangar-door counterweight, bringing it down on the F-100 cockpit, and doubtless ruining Crossfield.

Chuck Yeager never let me forget the incident. He drew many laughs at congregations of pilots by opening his talk: “Well, the sonic wall was mine. The hangar wall was Crossfield’s.” That’s the way it was at Edwards. Hero one minute, bum the next. That I was the first pilot to land an F-100 dead-stick successfully, and memorized elaborate and complete instrument data on the engine failure besides, was soon forgotten.

The F-100 is a tough bird. Within a month NACA’s plane was flying again, with Crossfield back at the helm. In the next few weeks I flew forty-five grueling flights in the airplane, pushing it to the limits, precisely defining the roll coupling. (On one flight the coupling was so severe that it cracked a vertebra in my neck.) These data confirmed, in actual flight, the need for a new F-100 tail, which North American was planning to install on later models of the airplane.

Every night after landing, I taxied the F-100 slowly to the NACA ramp. At the bottom, placed there on orders of Walt Williams, there was a large new sign, symbolic of the new atmosphere at Edwards. It said:

PLEASE COME TO A COMPLETE STOP BEFORE TAXIING UP RAMP 

—Always Another Dawn, The Story Of A Rocket Test Pilot, by A. Scott Crossfield with Clay Blair, Jr., The World Publishing Company, Cleveland and New York, 1960. Chapter 20 at Pages 196–199.

North American F-100A-5-NA Super Sabre parked on Rogers Dry Lake, 1959. It had been repaired and returned to service after running through the NACA hangar wall at Edwards AFB, 8 September 1954. In 1960, FW-778 was retired to Davis-Monthan AFB, Tucson, AZ. (NASA)
North American Aviation F-100A-5-NA Super Sabre 52-5778 parked on Rogers Dry Lake, 1959. It had been repaired and returned to service after running through the NACA hangar wall at Edwards AFB, 8 September 1954. In 1960, FW-778 was retired to Davis-Monthan AFB, Tucson, AZ. (NASA)
North American Aviation F-100A-5-NA Super Sabre 52-5778. (NASA)
North American Aviation F-100A-5-NA Super Sabre 52-5778. (NASA)
North American Aviation F-100A-5-NA Super Sabre 52-5778. (NASA)
North American Aviation F-100A-5-NA Super Sabre 52-5778. (NASA)
North American Aviation F-100A-5-NA Super Sabre 52-5778 parked on the ramp in front of the NACA hangar, Edwards Air Force Base, California, 1959. (NASA)
North American F-100A Super Sabre on the ramp near the NACA High-Speed Flight Station in 1957. (NASA)
NACA High Speed Flight Station, 24 August 1954. The Boeing P2B-1S Superfortress is parked at the northeast corner of the ramp. (NASA DFRC E54-1361)

© 2017, Bryan R. Swopes

20 August 1955

Aviation, , , , , , , , , , , , , , , ,
Colonel Horace A. Hanes with North American Aviation F-100C Super Sabre 53-1709, at Edwards AFB after setting a supersonic speed record, 20 August 1955. (U.S. Air Force)

20 August 1955: Colonel Horace A. Hanes, United States Air Force, flew the first North American Aviation F-100C-1-NA Super Sabre, 53-1709, to Mach 1.246 at 40,000 feet (12,192 meters), setting a new Fédération Aéronautique Internationale (FAI) speed record of 1,323.312 kilometers per hour (822.268 miles per hour) over a measured 15/25-kilometer course at Edwards Air Force Base, California.¹

This was the first supersonic world speed record. It was also the first speed record set at high altitude. Previously, all speed records were set very close to the ground for measurement purposes, but with ever increasing speeds this practice was becoming too dangerous.

For his accomplishment, Colonel Hanes was awarded the Mackay Trophy.

North American Aviation F-100C-1-NA Super Sabre 53-1709, FAI World Speed Record holder. (U.S. Air Force)
North American Aviation F-100C-1-NA Super Sabre 53-1709, FAI World Speed Record holder. (U.S. Air Force)

The North American Aviation F-100C Super Sabre was a single-seat, single-engine swept wing fighter. In addition to its air superiority role, the F-100C was also capable of ground attack.

The F-100C was 47.8 feet (14.57 meters) long (excluding pitot boom) with a wingspan of 38.8 feet (11.83 meters) and overall height of 15.5 feet (4.72 meters). The wings were swept aft 45° at 25% chord. The wings’ angle of incidence was 0° and there was no dihedral or twist. The total wing area was 385 square feet (35.8 square meters). The fighter had an empty weight of 19,197 pounds (8,708 kilograms), and maximum gross weight of 35,618 pounds (16,156 kilograms).

The F-100C was powered by a Pratt & Whitney J57-P-7 engine. The J57 was a two-spool axial-flow turbojet which had a 16-stage compressor section (9 low- and 7 high-pressure stages) and a 3-stage turbine (2 high- and 1 low-pressure stages). Its continuous power rating was 8,000 pounds of thrust (35.586 kilonewtons). The Military Power rating was 9,700 pounds (43.148 kilonewtons) (30-minute limit). Maximum power was 14,800 pounds (43.148 kilonewtons) with afterburner (5-minute limit). The engine was 20 feet, 9.7 inches (6.342 meters) long, 3 feet, 3.9 inches (1.014 meters) in diameter, and weighed 5,075 pounds (2,303 kilograms).

F-100C-1-NA Super Sabre 53-1709 at the North American Aviation, Inc., facility at Air Force Plant 42, near Palmdale, California. (Super Sabre Society)

The F-100C had a maximum speed of 756 knots (870 miles per hour/1,400 kilometers per hour) at 35,000 feet (10.668 meters). The service ceiling was 46,900 feet (14,295 meters). The maximum ferry range was 1,630 nautical miles (1,876 statute miles/3,019 kilometers).

The F-100C Super Sabre was armed with four 20 mm M-39 revolver cannon with 200 rounds of ammunition per gun. It could carry 14 unguided 2.75 inch (70 mm) Folding Fin Aerial Rockets in two 7-round pods. It could be loaded with four 1,000-pound, or six 750-pound bombs on underwing hard points. For tactical nuclear strike, the Super Sabre could be armed with a single MK-7 “Special Store.”

NASA 703, the World Record-setting North American Aviation F-100C-1-NA Super Sabre, 53-1709, parked on the dry lake at Edwards Air Force Base, 1962. (NASA EC62-144)

After being used in Air Force testing at Edwards Air Force Base, 53-1709 was transferred to the National Advisory Committee for Aeronautics (NACA) High-Speed Flight Station, also located at Edwards AFB. The F-100 was identified as NACA 703 and assigned civil registration N703NA. It was used for variable stability testing at the Ames Flight Research Center, Moffett Field, California, from 4 September 1956 to 2 November 1960, and 11 March 1964 until 21 March 1972. At some point its tail surfaces were upgraded to those of the F-100D series.

Today, the FAI world-record setting F-100C is displayed at the Castle Air Museum, marked as F-100D 55-2879.

World-record-setting North American Aviation F-100C-1-NA Super Sabre 53-1709 and the NACA (NASA after 1958) F-100C Variable Stability Team at the Ames Flight Research Center. Left to right: Don Heinle, Mel Sadoff, Dick Bray, Walt MacNeill, G. Allan Smith,Jack Ratcliff, John Foster, Jim Swain, Howard Clark, Don Olson, Dan Hegarty, Gil Parra, Eric Johnson and Fred Drinkwater. (NASA)
Horace A. Hanes, 1937. (The Index)

Horace Albert Hanes was born at Fayette, Illinois, 1 March 1916, the first of two children of Albert Lee Hanes, a farmer, and Martha Elizabeth Jones Hanes. Hanes grew up in Bellflower, Illinois. He attended Normal Community High School at Normal, Illinois, graduating in 1933, and then Illinois State Normal University, also located in Normal. He participated in basketball and track and field. He graduated in 1938 with a bachelor of arts degree in education. He worked as a teacher and athletic coach.

Hanes married Miss Virginia Kumber, a school teacher, in Covington, Indiana, 9 October 1937. The ceremony was officiated by Rev. Lawrence P. Green.

Horace Hanes entered the U.S. Army Air Corps as an aviation cadet, 8 October 1938. He graduated from flight training 25 August 1939 and was commissioned as a second lieutenant, Air Reserve. Lieutenant Hanes was assigned to the 18th Pursuit Group at Wheeler Field, Oahu, Territory of Hawaii, which was equipped with Curtiss-Wright P-36 Hawk and P-40 Warhawk “pursuits.”

Curtiss-Wright P-40B Warhawks of the 44th Pursuit Squadron, 18th Pursuit Group. (U.S. Air Force)

Hanes was commissioned as a second lieutenant, Air Corps, United States Army, 1 July 1940. While retaining his permanent rank of second lieutenant, Hanes advanced to the rank of first lieutenant, Army of the United States (A.U.S.), 10 October 1941. He returned to the United States and served with the Air Training Command.

Lieutenant Hanes was promoted to captain, A.U.S. (A.C.), 1 March 1942, and placed in command of a P-47 Thunderbolt squadron based in Florida, the 312th Fighter Squadron, 338 Fighter Group. On 26 November 1942, Hanes was promoted to the rank of major, A.U.S. On 1 July 1943, Hanes was promoted to the permanent rank of first lieutenant, Air Corps, United States Army. He retained this permanent rank until after the war.

Lockheed P-38J-15-LO Lightning 43-28777, 71st Fighter Squadron, 1st Fighter Group. (U.S. Air Force)

Major Hanes was deployed to Europe in August 1943, commanding the 71st Fighter Squadron (Twin Engine), 1st Fighter Group, at Mateur Airfield, Tunisia. The 71st had been the first operational P-38 squadron. After flying 30 combat missions, Major Hanes’ P-38 went down over Yugoslavia in January 1944. For the next three months he evaded capture. Hanes returned to the United States in April 1944 and was assigned to command Punta Gorda Army Airfield, a fighter training base on the western coast of Florida.

Hanes was promoted to lieutenant colonel, A.U.S., 1 August 1944, and to colonel, A.U.S., 23 October 1945. In January 1946, Colonel Hanes assumed command of the 31st Fighter Group, which deployed to Giebelstadt Army Airfield in southwest Germany. The group operated P-51D Mustangs and the new Lockheed P-80B Shooting Star jet fighter. In 1947, Colonel Hanes took command of the 67th Tactical Reconnaissance Group at March Air Force Base, Riverside, California. The 67th was equipped with the Douglas RB-26 Invader and the Lockheed RF-80 Shooting Star.

From January to July 1949, Colonel Hanes attended the Armed Forces Staff College, and then was assigned as Chief of the Air Defense Division within the Directorate of Research and Development, Headquarters, U.S. Air Force. From July 1952 to June 1953, he attended the Air War College, Maxwell Air Force Base, Montgomery, Alabama, and then became Director of Flight Test at the Air Force Flight Test Center, Edwards Air Force Base. It was while at Edwards that Colonel Hanes set the world speed record. He remained at the AFFTC for four years.

Hanes took command of the 58th Fighter-Bomber Wing at Osan Air Base, Republic of South Korea, July 1957. The 58th flew the North American Aviation F-86F Sabre. He then spent three years in Japan as Deputy Chief of Staff, Operations, Fifth Air Force.

In July 1964, Brigadier General Hanes took command of the 9th Aerospace Defense Division at Ent Air Force Base, Colorado Springs, Colorado. On 24 September 1964, Hanes was promoted to the rank of major general, with his date of rank retroactive to 1 April 1960. After two years, Hanes returned to Europe as Assistant Chief of Staff, Operations, Supreme Headquarters, Allied Powers Europe.

Major General Hanes’ final assignment was as Vice Commander, Aerospace Defense Command. He  retired from the United States Air Force in 1973.

During his military Career, Major General Horace Albert Hanes, United States Air Force, was awarded the Distinguished Service medal, the Silver Star, Legion of Merit with oak leaf cluster (two awards), the Air Medal with five oak leaf clusters (six awards), the Air Force Commendation medal and the Air Force Outstanding Unit Award ribbon.

Major General Hanes died at his home in Bloomington, Indiana, 3 December 2002. He was buried alongside his wife, Virginia (who died in 1996) at the United States Air Force Academy Cemetery, Colorado Springs, Colorado.

Major General Horace Hanes, United States Air Force
Major General Horace Albert  Hanes, United States Air Force

¹ FAI Record File Number 8867

© 2018, Bryan R. Swopes