25 March 1956

Martin XB-51 46-685, the number one prototype, on takeoff. (U.S. Air Force)
Martin XB-51 46-685, the number one prototype, on takeoff. (Lockheed Martin)

25 March 1956: At approximately 10:50 a.m., the first of two prototype Martin XB-51 three-engine attack bombers, serial number 46-685, crashed on takeoff from Runway 22 at El Paso International Airport (ELP). The pilot, Major James O. Rudolph, United States Air Force, survived the crash although he was  seriously burned. Staff Sergeant Wilbur R. Savage, 28, engineer, was killed. Major Rudolph died of injuries 16 April 1956.

Pieces of wreckage were marked “Gilbert XF-120” which had been painted on the airplane for the filming of the William Holden, Lloyd Nolan movie, “Toward The Unknown.” (Toluca Productions, 1956). The second prototype, 46-686, had previously crashed at Edwards AFB.

A newspaper article from the El Paso Times is quoted below [I have corrected some typographical errors]:

03/26/1956

Bill Feather
El Paso Times

A sleek jet bomber, carrying a full load of fuel, crashed while attempting a take-off at International Airport Sunday morning, killing the flight engineer and seriously injuring the pilot.

The XB-51, the only one of its type in existence, smashed through the fence at the end of the southwest runway and then began to disintegrate, spreading wreckage along a 250-yard trail.

Only the tail section of the three-engine bomber was left intact.

Name of the dead man, a 28-year-old staff sergeant was withheld pending notification of next of kin.

Flying the aircraft was Maj. James O. Rudolph, 36, one of the top test pilots in the Air Force.

He suffered severe burns and was taken Sunday afternoon in an emergency flight to Brooke Army Hospital in San Antonio.

The XB-51, based at Edwards Air Force Base in Muroc, Calif., was being flown to Eglin Air Force Base, Florida, where it was to be used in the filming of a Warner Brothers movie, “Toward the Unknown.”

Identification of the aircraft was confused for a short time after the crash.

A piece of wreckage with the notation “Gilbert XF-120” was found nearby.

HAD REFUELED

Air Force spokesmen explained that the XF designation had been painted on the plane for use in the movie.

The airplane had been refueled at International Airport and started its takeoff at 10:30 a.m.

Witnesses said the plane got about three feet above the ground and suddenly settled. The tail dragged first and then the rest of the airplane settled, running at high speed.

It ripped through a barbed wire fence at the end of the runway, raced across Airport Road and then began to go to pieces.

After crashing, it burned and several explosions threatened firemen, rescuers and spectators who crowded around the flaming aircraft.

First person to the scene of the crash was Eddie C. Wilkerson, 1106 Del Monte Drive, tennis coach at Austin High School.

“I was just turning into the road to the airport when the plane was taking off. I don’t believe it ever got airborne.

“I looked back and saw a big ball of smoke, so I just wheeled my car around.”

Wilkerson said that when he arrived, the major was lying on the ground about 15 feet from the burning wreckage.

“His clothes were burning so I started tearing them off.”

Other witnesses to the crash arrived and helped Wilkerson move the major to a safer place, away from the intense heat of the flaming aircraft.

Capt. John D. Chandler, a doctor at the Biggs Hospital, was at the airport when the crash occurred and he was one of the first persons at the scene. He administered aid to the injured man until an ambulance arrived. Later Capt. Chandler flew to San Antonio with Maj. Rudolph.

A fire truck from International Airport was rushed to the scene almost as soon as the plane stopped its forward motion.

Sunday drivers were attracted to the scene by the tower of smoke and the heavy traffic delayed the arrival of fire trucks from Biggs Air Force Base.

The plane was one of two XB-51s built by Martin Aircraft Co. and was completed in 1953.

The first one crashed at Muroc, Calif., in 1952.

Air Force spokesmen said the aircraft was comparable to the B-47, which was accepted instead of the XB-51 for use in the Air Force.

Its three jet engines one in each wing and on in the fuselage, were capable of driving the craft at tremendous speeds. The aircraft had broken the sound barrier, spokesmen said.

Its sleek lines gave it the appearance of a fighter rather than a medium bomber.

Normally, the airplane carried a crew of three.

Recently it had been used in assisting the Army in missile and anti-aircraft development at Aberdeen Proving Ground, Md.

A board of officers was investigation the crash and two Air Force colonels arrived at Biggs Air Force Base from Muroc Sunday afternoon.

Military police from Ft. Bliss and Air Police patrolled the area about the crash Sunday afternoon, keeping away the curious.

— http://elpasotimes.typepad.com/morgue/2011/03/today-in-1956-plane-crash-kills-engineer-pilot-injured-as-bomber-falls-.html

James Otto Rudolph was born at Marion, Ohio, 8 February 1920, the first of two children of of Frank Otto Rudolph, a German immigrant who was employed as a secretary for the YMCA, and Helen Claire Shafer Rudolph.

Following two years of college, Rudolph enlisted as an Aviation Cadet, U.S. Army Air Corps, at Detroit, Michigan, 17 March 1941. He was 6 feet, 1inch (1.854 meters) tall and weighed 175 pounds (79.4 kilograms). He was commissioned as a Second Lieutenant, Air Reserve, 31 October 1941,and was promoted to First Lieutenant, Army of the United States (Air Corps), 5 August 1942. He was again promoted, to Captain, and again, 15 June 1943. Following the end of World War II, Rudolph was promoted to the rank of Major, 19 September 1946. He remained in the Air Force, but with military needs shrinking, he reverted to the rank of First Lieutenant, with date of rank, 7 December 1944.

James Rudolph married Clara D.    in 194–

Major Rudolph graduated from the U.S. Air Force Experimental Flight Test Pilot School, Class 54-A, 2 July 1954. As a test pilot at Edwards Air Force Base, Rudolph was a project pilot in the FICON program in which Republic RF-84K Thunderflash reconnaissance planes were carried by modified Convair RB-36D bombers.

During his military career, Major Rudolph had been awarded the Air Medal with three oak leaf clusters (four awards).

After the crash on 25 March 1956, Major Rudolph was taken to Brooke Army Hospital, Fort Sam Houston, Texas, suffering from 2nd and 3rd degree burns over 38% of his body. He contracted septicemia and died there, 16 April 1956. He is buried at Arlington National Cemetery.

The first Martin XB-51, 46-585, in flight. (U.S. Air Force)

The Glenn L. Martin Co. XB-51 was a prototype jet-powered attack bomber. It was an unusual design for its time. The airplane had mid-mounted, variable-incidence swept wing, a T-tail and tandem landing gear with a configuration similar to that used on the Boeing B-47 Stratojet (and which had been tested using a Martin B-26 Marauder medium bomber.)

The XB-51 was operated by a pilot in a single-place cockpit with a bubble canopy, and a navigator station inside the fuselage, below and behind the pilot. The prototype was 85 feet, 1 inch (25.933 meters) long with a wingspan of 53 feet, 1 inch (16.180 meters) and overall height of 17 feet, 4 inches (5.283 meters). The airplane had an empty weight of 29,584 pounds (13,419 kilograms) and gross weight of 55,923 pounds (25,366 kilograms).

The wings of the XB-51 were swept to 35° and had 6° anhedral. The wings’ angle of incidence (the relation of the chord to the fuselage longitudinal axis) could be adjusted to increase lift for takeoff and landing. They also were equipped with leading edge slats for improved low speed performance. Instead of ailerons, the XB-51 used spoilers.

Lloyd Nolan (“General Bill Banner”) and William Holden (“Major Lincoln Bond”) with the “Gilbert XF-120” in the 1956 Hollywood movie, “Toward the Unknown.” (Toluca Productions via Turner Classic Movies)

Power was supplied by three General Electric J47-GE-13 turbojet engines, with two located in nacelles outboard of the forward fuselage on 45° pylons, and a third installed in the tail with its intake on top of the fuselage. The J47-GE-13 was an axial-flow turbojet with a 12-stage compressor and single stage turbine. It was rated at 5,200 pounds of thrust (23.13 kilonewtons) at Sea Level. The engine was 12 feet, 0.0 inches (3.658 meters) long, 3 feet, 3.0 inches (0.991 meters) in diameter and weighed 2,525 pounds (1,145 kilograms). A Rocket Assisted Takeoff (RATO) system was also installed.

The XB-51 had a cruise speed of 532 miles per hour (856 kilometers per hour) and a maximum speed of 645 miles per hour (1,038 kilometers per hour) at Sea Level—0.x Mach). The service ceiling was 40,500 feet (12,344 meters) and range was 1,075 miles (1,730 kilometers).

Armament was planned for a maximum bombload of 10,400 pounds (4,717 kilograms) carried internally in a rotary bomb bay, and eight M39 20 mm revolving autocannon mounted in the nose with 1,280 rounds of ammunition.

Martin XB-51 46-685 during engine start and ground run-up. (U.S. Air Force)

© 2017 Bryan R. Swopes

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25 March 1955

John W. Konrad in the cockpit of the prototype Vought XF8U-1 Crusader, Bu. No. 138899. (Vought Heritage)
John W. Konrad in the cockpit of the prototype Vought XF8U-1 Crusader, Bu. No. 138899. (Vought Heritage)

25 March 1955: Chance Vought Aircraft Corporation experimental test pilot John William Konrad took the first prototype XF8U-1 Crusader, Bu. No. 138899, for its first flight at Edwards Air Force Base in the high desert of Southern California. The new fighter had been transported from the factory at Dallas, Texas, by truck. During the first flight, the Crusader went supersonic in level flight. It was able to maintain supersonic speeds (not only for short periods in a dive) and was the first fighter aircraft to exceed 1,000 miles per hour in level flight (1,609 kilometers per hour).

The F8U Crusader has a unique variable-incidence wing which can be raised to increase the angle of attack. This created more lift at low speeds for takeoff and landing aboard aircraft carriers, but allows the fuselage to remain fairly level for better forward visibility.

The test program went so well that the first production airplane, F8U-1 Crusader Bu. No. 140444, made its first flight just over six months after the prototype’s.

Prototype Vought XF8U-1 Crusader during a test flight, 25 March 1955. (Vought)
Prototype Vought XF8U-1 Crusader Bu. No. 138899 during a test flight, 25 March 1955. (Vought Heritage)

The Chance Vought F8U-1 was nearly identical to the prototype XF8U-1. It was a single-place, single-engine swept-wing fighter designed to operate from the United States Navy’s aircraft carriers. The F8U-1 was 54 feet, 3 inches (16.535 meters) long with a wingspan of 35 feet, 8 inches (10.871 meters) and height of 15 feet, 9 inches (4.801 meters). Its empty weight was 15,513 pounds (7,037 kilograms) and maximum takeoff weight was 27,468 pounds (12,459 kilograms).

Early production aircraft were powered by a Pratt & Whitney J57-P-12A engine. This was a two-spool, axial-flow turbojet engine with a 16-stage compressor and 3-stage turbine. The J57-P-12A was rated at 10,000 pounds of thrust (44.48 kilonewtons), and 16,000 pounds (71.17 kilonewtons) with afterburner.

The F8U-1 had a maximum speed of 733 miles per hour (1,179.7 kilometers per hour) at Sea Level and Mach 1.53 (1,013 miles per hour/1,630.3 kilometers per hour) at 35,000 feet (10,668 meters). It had a service ceiling of 42,300 feet (12,893 meters) and combat radius of 389 miles (626 kilometers).

Vought XF8U-1 Crusader parked on Rogers Dry Lake, Edwards Air Force Base. (Vought)
Vought XF8U-1 Crusader Bu. No. 138899 parked on Rogers Dry Lake, Edwards Air Force Base. (Vought Heritage)

The Vought F8U Crusader was in production from 1955 through 1964 with a total of 1,261 built in both fighter and photo reconnaissance versions. The fighter earned several nicknames: It is known as “The Last of the Gunfighters” because it was the last American fighter aircraft to be designed with guns as the primary armament. (It carried four Colt Mark 12 20-mm autocannon with 144 rounds of ammunition, each, though it could also carry AIM-9 Sidewinder air-to-air missiles.) Because of a high accident rate, the Crusader has also been called “The Ensign Killer.”

During five years of testing, Bu. No. 138899 made 508 flights. It was donated to the Smithsonian Institution in 1960. The restored prototype is now at The Museum of Flight, Seattle, Washington.

The Vought XF8U-1 has been restored by The Museum of Flight at Paine Field, Stattle, Washington. (The Museum of Flight)
The first of two prototypes, Chance Vought XF8U-1 Crusader, Bu. No. 138899, has been restored by The Museum of Flight at Paine Field, Seattle, Washington. The Crusader’s variable incidence wing is in the raised take-off/landing position. (The Museum of Flight)

John william Konrad was born 25 November 1923 at San Diego, California. He was the second of three children of  William Konrad, a salesman, and Anne E. Stensrud Konrad.

Konrad became interested in aviation at an early age, learning to fly in a Piper Cub at the age of 15.Learned to fly in a Piper J-3 Cub at San Diego, age 15. After graduating from high schhool, he enlisted as a private in the U.S. Army Air Corps at San Diego, 26 February 1943. Konrad was 5 feet, 3 inches (1.600 meters) tall and weighed 118 pounds (53.5 kilograms). He trained as a pilot and flew Boeing B-17 Flying Fortress heavy bombers with the 305th Bombardment Group (Heavy), stationed at RAF Chelveston, during World War II. He later flew Douglas C-47 Skytrains during the Berlin Airlift.

Konrad married Miss Harriet Marilyn Hastings at Clearwater, Florida, 11 February 1945. They would have two children.

Following the War, Konrad was selected for the first test pilot training class at Wright Field, then was assigned to Muroc Army Airfield (Edwards Air Force Base) in California, where he graduated from the Air Force Experimental Flight Test Pilot School, Class 51-C, 19 May 1952.

Konrad resigned from the Air Force in 1953 and joined the Chance Vought Aircraft Corporation in Dallas, Texas, as a test pilot. In addition the the XF8U-1 Crusader, he also made the first flight of the Ling-Temco-Vought A-7 Corsair II, and the experimental LTV XC-142 tiltwing V/STOL transport in 1964. He was appointed Director Test Operations in 1965. Konrad retired from Vought in 1988 after 25 years with the company.

After retiring, John Konrad continued to fly a Goodyear FG-!D Corsair with Commemorative Air Force.

John William Konrad, Sr., Captain, United States Air Force, died 20 September 2006 at Dallas, Texas. He is buried at the Dallas–Fort Worth National Cemetery.

John William Konrad. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

© 2017, Bryan R. Swopes

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24 March 2000

The first super Jolly Green Giant, 66-14428, now upgraded to an MH-53J Pave Low IIIE, assigned to the 551st Special operations Squadron, 58th Special operations Wing, in flight near Kirtland Air Force Base, New Mexico, 24 March 2000. (U.S. Air Force)
The first Super Jolly Green Giant, 66-14428, now upgraded to an MH-53J Pave Low IIIE, assigned to the 551st Special Operations Squadron, 58th Special Operations Wing, in flight near Kirtland Air Force Base, New Mexico, 24 March 2000. (U.S. Air Force)

24 March 2000: In flight near Kirtland AFB, New Mexico, is this Sikorsky MH-53J Pave Low IIIE, a “Super Jolly Green Giant” special operations helicopter assigned to the 551st Special Operations Squadron. This helicopter, serial number 66-14428, was the very first HH-53B built. [A photograph of its first flight is posted on TDiA at “15 March 1967”]

A variant of the United States Navy/Marine Corps CH-53A Sea Stallion, the Super Jolly Green Giant was the largest, most powerful, and fastest helicopter in the United States Air Force inventory. Configured for combat search and rescue (CSAR) and special operations, the HH-53B was equipped for inflight refueling and was armed with three General Electric GAU/2A 7.62 mm miniguns or .50-caliber Browning machine guns. Over the decades, HH-53B 66-14428 was upgraded to HH-53H, then Pave Low II, HH-53J Pave Low III and finally to MH-53J Pave Low III Enhanced configuration.

The Super Jolly Green Giant has an overall length of 88 feet, 2.4 inches (26.833 meters) with rotors turning. With the refueling boom extended, the total length of the helicopter is 91 feet, 11.34 inches (28.025 meters). The fuselage is 67 feet, 2.4 inches (20.483 meters) long and 8 feet (2.438 meters) wide. The HH-53B had an overall height of 24 feet, 10.8 inches (7.590 meters).

The MH-53J’s six-bladed main rotor had a diameter of 72 feet, 2.7 inches (22.014 meters) and turns counter-clockwise, seen from above. (The advancing blade is on the helicopter’s right side.) At 100% NR, the rotor turns 185 r.p.m. The tail rotor has four blades and a diameter of 16 feet, 0 inches (4.877 meters). It is positioned on the left side of a vertical pylon, or fin, in a pusher configuration. The tail rotor turns clockwise at 792 r.p.m., as seen from the helicopter’s left side. (The advancing blade is below the axis of rotation.)

The MH-53J has an empty weight of 32,000 pounds (14,515 kilograms). Its maximum takeoff weight (wartime) is 50,000 pounds (22,680 kilograms). 66-14428 was originally equipped with two General Electric T64-GE-3 turboshaft engines, producing 3,080 shaft horsepower, each. These were later upgraded to T64-GE-100 engines, increasing power to 4,330 shaft horsepower.

The helicopter has a maximum speed (VNE) of 143 nautical miles per hour (165 miles per hour, 266 kilometers per hour) at Sea Level. The service ceiling is 16,000 feet (4,877 meters). It’s range is 591 nautical miles (680 miles, 1,094 kilometers) and is capable of inflight refueling.

The Air Force ordered eight HH-53B and 58 improved HH-53C Super Jolly Green Giants. Throughout their service lives, the Super Jolly Green Giants were continuously upgraded.

66-14428 was sent to The Boneyard at Davis-Monthan AFB, 7 January 2007, after 40 years of service.
© 2016, Bryan R. Swopes
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24 March 1960

The prototype Tupolev Tu-114, CCCP-L5611, a long-range turboprop airliner, on display at the Monino Central Air Force Museum, Moscow. (Aldo Bidini)

24 March 1960: Over a 1,000-kilometer course at Sternberg Point Observatory,¹ a Tupolev Tu-114 Rossiya four-engine turboprop airliner, serial number 88402, registered  CCCP-76459, set eight Fédération Aéronautique Internationale flight records, including a world speed record of 871.38 kilometers per hour (541.45 miles per hour) while carrying a load of 25,000 kilograms (55,115.6 pounds).

Colonel Ivan Moiseevich Sukhomlin, Honored Test Pilot of the Soviet Union

The flight crew for these records were Tupolev Design Bureau senior test pilot Ivan Moiseevich Sukhomlin, Pilot, and Boris Mikhailovich Timoshok, Co-Pilot, and four others.

This is the fastest speed record ever established for any propeller-driven airplane, a record that has stood for 56 years.

FAI Record File Num #8125 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km without payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8126 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 1 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8127 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 2 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8128 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 5 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8129 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 10 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8130 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 15 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8131 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 20 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B.TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

FAI Record File Num #8880 [Direct Link]
Status: ratified – retired by changes of the sporting code
Region: World
Class: C (Powered Aeroplanes)
Sub-Class: C-1 (Landplanes)
Category: Not applicable
Group: 2 : turboprop
Type of record: Speed over a closed circuit of 1 000 km with 25 000 kg payload
Performance: 871.38 km/h
Date: 1960-03-24
Course/Location: Sternberg-Point, Observatoire (USSR)
Claimant Ivan Soukhomline (URS)
Crew B. TIMOCHOK + équipage de 4
Aeroplane: Tupolev TU-114
Engines: 4 Kuznetsov NK- 12

Colonel Alexei Petrovich Yakimov, Honored Test Pilot of the Soviet Union.

The Tupolev Tu-114 Rossiya was a four-engine, turboprop-powered airliner developed from the Tu-95 Bear nuclear-capable long-range heavy bomber. It had a flight crew of five and could be configured to carry from 120 to 220 passengers. The airliner made its first flight 15 November 1957 under the command of Colonel Alexei Petrovich Yakimov,  and began regular service with Aeroflot 24 April 1961.

The Tu-114 is 54.10 meters (177 feet, 6 inches) long, with a wingspan of 51.10 meters (167 feet, 8 inches) and overall height of 15.50 meters (50 feet, 10 inches). The wings are swept to a 35° angle and have significant anhedral. The airliner’s empty weight is 91,000 kilograms (200,621 pounds) and maximum takeoff weight is 171,000 kilograms (376,990 pounds).

The Tu-114 was powered by four Kuznetsov NK-12MV turboprop engines, each driving two counter-rotating four-bladed propellers. The NK-12 was rated at 14,795 shaft horsepower (10.89 megawwatts). The NK-12 is a single-shaft axial-flow turbpprop engine with a 14-stage compressor section and 5-stage turbine. The engine is 19 feet, 8.2 inches (6.000 meters) long, 3 feet, 11.3 inches (1.151 meters) in diameter, and weighs 5,181 pounds (2,350 kilograms).

The Tu-114 had a cruise speed of 770 kilometers per hour (478 miles per hour) at 9,000 meters (29,528 feet) (0.70 Mach), and a maximum speed of 870 kilometers per hour (541 miles per hour) at 8,000 meters (26,247 feet) (0.78 Mach).

The Tupolev Tu-114 was produced from 1958 to 1963, with 32 built. They were in service until 1976.

CCCP-76459, the world-record-setting airliner, was displayed at Novogorod Airport, Veliky Novogorod, Russia, in 1977. It was destroyed by fire in 1990.

¹ The Sternberg Point Observatory, also known as the Sternberg Astronomical Institute (Государственный астрономический институт имени Штернберга), is located in Moscow, Russia.

Sternberg Astronomical Institute

© 2017, Bryan R. Swopes

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24 March 1960

Joseph Albert Walker in the cockpit of North American Aviation X-15A 56-6670, after a flight, 1960. (NASA)
Joseph Albert Walker in the cockpit of North American Aviation X-15A 56-6670, after a flight, 1960. (NASA)

24 March 1960: After North American Aviation’s Chief Engineering Test Pilot, Albert Scott Crossfield, had made the first flights in the new X-15 hypersonic research rocketplane (one gliding, eight powered), NASA Chief Test Pilot Joseph Albert Walker made his first familiarization flight.

The X-15, 56-6670, the first of three built by North American Aviation, Inc., was carried aloft under the right wing of a Boeing NB-52A Stratofortress, 52-003, flown by John E. Allavie and Fitzhugh L. Fulton.

The rocketplane was dropped from the mothership over Rosamond Dry Lake at 15:43:23.0 local time, and Joe Walker ignited the Reaction Motors XLR-11 rocket engine. The engine burned for 272.0 seconds, accelerating Walker and the X-15 to Mach 2.0 (1,320 miles per hour/2,124.3 kilometers per hour) and a peak altitude of 48,630 feet (14,822.4 meters). Walker landed on Rogers Dry Lake at Edwards Air Force Base after a flight of 9 minutes, 8.0 seconds.

Joe Walker made 25 flights in the three X-15 rocket planes from 24 March 1960 to 22 August 1963. He achieved a maximum Mach number of 5.92, maximum speed of 4,104 miles per hour (6,605 kilometers per hour) and maximum altitude of 354,200 feet (107,960 meters).

Joe Walker was killed in a mid-air collision between his Lockheed F-104N Starfighter and a North American Aviation XB-70A Valkyrie near Barstow, California, 1 June 1966.

The number one ship, 56-6670, made 81 of the 199 flights of the X-15 Program. It was the first to fly, and also the last, 24 October 1968. Today, it is in the collection of the Smithsonian Institution National Air and Space Museum.

North American Aviation, Inc. X-15A 56-6670 on Rogers Dry Lake, Edwards Air Force Base, California. (NASA)
North American Aviation, Inc. X-15A 56-6670 on Rogers Dry Lake, Edwards Air Force Base, California. (NASA)

© 2017, Bryan R. Swopes

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