Daily Archives: April 20, 2017

20 April 1978

Korean Air Lines' Boeing 707 on the frozen lake. (www.autoreview.ru)
Korean Air Lines’ Boeing 707 on the frozen lake. (www.autoreview.ru)

20 April 1978: A Soviet Air Force Sukhoi Su-15TM interceptor shot down Korean Air Lines Flight 902, a Boeing 707 airliner which had overflown Soviet territory. A major navigational error caused Flight 902 to deviate approximately 150° from its planned route.

Captain Alexander Bosov, an interceptor pilot of the 365th IAP (Istrebitel’nyy Aviatsionnyy Polk, Fighter Aviation Regiment), Soviet Air Defense Forces, based at Afrikanda, Murmansk Oblast, Russia, had been sent to intercept the intruder. He repeatedly informed his controllers that the airplane was a civilian airliner, describing its markings, but his superiors ordered him to shoot it down.

Bosov fired two Vympel R-60 infrared-homing air-to-air missiles. One missed, but the second missile hit the 707’s left wing and detonated.

An unidentified Soviet fighter pilot with a Sukhoi Su-15, Yellow 10, at Afrikanda Air Base, where Captain Bosov was assigned. (Wikimapia)
An unidentified Soviet fighter pilot with a Sukhoi Su-15, 10 Yellow, at Afrikanda Air Base, where Captain Bosov was assigned. (Wikimapia)

The airliner’s left wing, outboard of the Number 1 engine, was blown off. Shrapnel penetrated the passenger cabin, resulting in explosive decompression. Of the 109 persons on board, two were killed.

(The descending wing section was picked up by Soviet air defense radar, with the return being interpreted as a cruise missile, and another interceptor was sent to attack it.)

The flight crew, Captain Kim Chang Kyu Lee, co-pilot Chyn Xing, and Navigator Lee Kun-shik, crash landed the 707 on a frozen lake in the Karelian Autonomous Soviet Socialist Republic, near the USSR-Finland border.

(Captain Kim had been a fighter pilot during the Korean War, flying the Mikoyan-Gurevich MiG-15 for the Korean Peoples Air Force.)

Damage to teh fuselage of Boeing 707 (www.autoreview.ru)
Damage to the fuselage of Boeing 707 (www.autoreview.ru)

Soviet news articles commended Captain Bosov for his skill in firing the missiles so that the airliner would only be damaged, rather than destroyed.

The damaged left wing of Flight 902
The damaged left wing of Flight 902. (www.autoreview.ru)

Flight 902 was a 1967 Boeing 707-321B, serial number 19363. It was first flown 9 September 1967, and was delivered to Pan American World Airways on 21 September 1967, registered N428PA, and named Clipper Star of Hope. The United States registration was cancelled 12 May 1977, when 19363 was exported to Korea and registered HL7429.

The Sukhoi Su-15 is the same type interceptor that shot down Korean Air Lines Flight 707.

A Soviet Sukhoi Su-15 interceptor armed with R-98MR air-to-air missiles. Department of Defense)
A Soviet Sukhoi Su-15 interceptor, 38 Red, armed with R-98MR air-to-air missiles. (Department of Defense)
Derelict HL7429 being dismantled during the summer of 1978. (colonel-baranez.livejournal.com)
Derelict HL7429 being dismantled during the summer of 1978. (colonel-baranez.livejournal.com)

© 2017, Bryan R. Swopes

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20–21 April 1964

Lockheed L100-20 N1130E, in flight. Both outboard engines are shut down and the propellers feathered. (Lockheed Martin)
Lockheed L-100 Hercules N1130E, in flight. Both outboard engines are shut down and the propellers feathered. (Lockheed Martin)

20–21 April 1964: Nearly ten years after the first flight of the Lockheed YC-130 Hercules prototype, the Lockheed Model 382, serial number 3946, the commercial version of the military C-130E, made the longest first flight in history when it flew for 25 hours, 1 minute, after taking off from Marietta, Georgia. The aircraft was certified by the Federal Aviation Administration 16 February 1965.

Lockheed personnel celbrate the 25 hour, 1 minute first flight of the commercial L100 Hercules. (Lockheed Martin)
Lockheed personnel celebrate the 25 hour, 1 minute first flight of the commercial L-100 Hercules. (Lockheed Martin)

The L-382 was powered by four Allison 501-D22 turboprop engines, rated at 3,755 shaft horsepower at 13,820 r.p.m., and driving four-bladed Hamilton Standard Hydromatic constant-speed, reversible-pitch propellers with a diameter of 13 feet, 6 inches ( meters). at 1,020 r.p.m.

Maximum operating altitude 32,600 feet ( meters)

N1130E at Fairbanks, leased to Alaska Airlines. (Lockheed Martin)
N1130E at Fairbanks, leased to Alaska Airlines, 1965. (Lockheed Martin)

N1130E was retained by Lockheed as a demonstrator, however it was briefly leased to Alaska Airlines in March 1965, and returned the following month.

The L-382 was converted to the L382E-44K-20 standard in April 1968, with a 5 foot, 0 inch (1.524 meters) segment added to the fuselage behind the cockpit, and a 3 foot, 4 inch (1.016 meter) section behind the wing.

N1130E's fuselage was cut in two places to accommodate an 8 foot, 4 inch ( meter) stretch. (Lockheed Martin)
N1130E’s fuselage was cut in two places to accommodate an 8 foot, 4 inch (2.540 meter) stretch. (c-130hercules.net)
N1130E after conversion to the L100-20 configuration, at Lockheed-Burbank Airport, 1968. (Unattributed)
N1130E after conversion to the L100-20 configuration, at Lockheed-Burbank Airport, 1968. (c-130hercules.net)

N1130E was leased to Delta Air Lines in October 1968, and returned after six months.

Lockheed sold N1130E to Pepsico Airlease Corporation, who leased the freighter to Flying W Airways. It was reregistered as N50FW. In March 1973 Pepsico sold it to Philippine Aerotransport and it was operated for the Philippine government, first as PI-97, and then RP-97.

The first commercial Lockheed L-100, s/n 3946, in service with the Republic of the Philippines. (Ken Fielding via flickr)
The first commercial Lockheed L-100, s/n 3946, in service with the Republic of the Philippines. (Ken Fielding via flickr)

After sixty-two years, the Lockheed Hercules remains in production, and both military and civil versions are in service worldwide.

Lockheed Martin Model 382J Super Hercules (Lockheed Martin)
Lockheed Martin Model 382J Super Hercules, N100J. (Lockheed Martin)

© 2017, Bryan R. Swopes

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20 April 1962

E-334220 April 1962: “Neil’s Cross-Country.” NASA Research Test Pilot Neil Alden Armstrong conducts a flight to test the MH-96 flight control system installed in the third North American Aviation X-15, serial number 56-6672. The new system combined both aerodynamic and reaction thruster flight controls in one hand controller rather than the two used in X-15s -670 and -671, simplifying the tasks for the pilot.

On its fourth flight, -672 was air-dropped from the Boeing NB-52B Stratofortress “mothership,” Balls 8, over Mud Lake, Nevada. Armstrong fired the XLR-99 engine and let it burn for 82.4 seconds. The X-15 accelerated to Mach 5.31 (3,789 miles per hour/6,098 kilometers per hour). After the engine was shut down, the rocketplane continued to its peak altitude on a ballistic trajectory, reaching 207,500 feet (63,246 meters) before going over the top and beginning its descent back toward the atmosphere. The test of the new flight control system went well.

E63-9834Neil Armstrong began to pull out of the descent at about 100,000 feet (30,480 meters), but the X-15 “bounced” off the top of the atmosphere and climbed back to 115,000 feet (35,052 meters) where the aerodynamic control surfaces could not function. He used the reaction thrusters to turn toward the dry lake landing area at Edwards AFB, but although the X-15 rolled into a left bank, it would not change direction, and still in ballistic flight, went zooming by Edwards at Mach 3 and 100,000 feet in a 90° left bank.

As the X-15 dropped back into the atmosphere, Armstrong was finally able to get it slowed down, but he was far south of his planned landing site. By the time he got -672 turned around, he was 45 miles (72.4 kilometers) to the south, over the Rose Bowl in Pasadena, and gliding through 45,000 feet (13,716 meters). There was real doubt that he would be able to make the X-15 stretch its glide to reach the dry lake.

E-7469In a masterful display of airmanship, Neil Armstrong was able to get the X-15 to reach the south end of the dry lake, 12 miles (19.3 kilometers) from the planned landing spot to the north. But it was a very close call. In debriefing, the pilots of the four F-104 chase planes were asked how much clearance Armstrong had as he crossed over the Joshua trees at the edge of the lake bed. One of them answered, “Oh, at least 100 feet—on either side.”

At 12 minutes, 28.7 seconds, this was the longest flight of the entire X-15 program. It is called “Neil’s cross-country flight.”

North American Aviation X-15 56-6670 with Neil A. Armstrong, Jr., NASA Research Test Pilot, Edwards AFB, 1960A U.S. Navy fighter pilot who flew 78 combat missions during the Korean War, Neil Armstrong became a civilian test pilot at NACA (National Advisory Committee on Aeronautics, the predecessor to NASA) in 1955. He made 7 flights in the X-15 before transferring to NASA’s Project Gemini in 1962.

Armstrong was command pilot for Gemini 8 and Gemini 11, commander of the backup flight crew of the Apollo 8 mission, and was commander of Apollo 11.

On 20 July 1969, Neil Alden Armstrong was the First Man To Stand on the Surface of The Moon.

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© 2016, Bryan R. Swopes

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20 April 1941

Squadron Leader Marmaduke Thomas St. John “Pat” Pattle, Officer Commanding No. 33 Squadron, Royal Air Force, and the Squadron Adjutant, Flight Lieutenant George Rumsey, standing by a Hawker Hurricane at Larissa, Thessaly, Greece, March–April 1941. (IWM)

20 April 1941: Squadron Leader Marmaduke Thomas St. John Pattle, DFC and Bar, Royal Air Force, commanding No. 33 Squadron, was killed in action during the Battle of Athens, when his Hawker Hurricane fighter was shot down by two or more Luftwaffe Messerschmitt Bf 110 fighters. Pattle’s airplane crashed into the sea near the Port of Piraeus, southwest of Athens.

Messerschmitt Bf 110 twin-engine heavy fighter, circa 1942. (Deutsches Bundesarchiv)

Squadron Leader Pattle may have been the highest-scoring Allied fighter ace of World War II. The exact number of enemy aircraft destroyed cannot be determined precisely because records were lost or destroyed during the Battle of Greece. The last officially acknowleded score was 23 airplanes shot down, mentioned in The London Gazette with the notice of the award of a Bar to his Distinguished Flying Cross. It is widely acknowledged that he shot down many more, and on at least two occasions, shot down five enemy airplanes in one day. Authors who have researched Pattle’s combat record believe that he shot down at least 50, and possibly as many as 60 aircraft.

For comparison, Air Vice Marshal James Edgar (“Johnnie”) Johnson, CB, CBE, DSO and Two Bars, DFC and Bar, is officially credited by the Royal Air Force with shooting down 34 enemy airplanes. Colonel Francis Stanley (“Gabby”) Gabreski, United States Air Force, was credited with 28 kills during World War II. In the Pacific Theater of Operations, Major Richard Ira Bong is officially credited with 40 enemy airplanes shot down.

Marmaduke Thomas St. John Pattle was born at Butterworth, Cape Province, South Africa, 23 July 1914. He was the son of Sergeant-Major William John Pattle, British Army, and Edith Brailsford Pattle. After failing to be accepted by the South African Air Force, at the age of 21 years, he traveled to Britain to apply to the Royal Air Force. He was offered a short-service commission and sent to flight school.

Pattle was commissioned as an Acting Pilot Officer on probation, effective 24 August 1936. He trained as a fighter pilot in the Gloster Gauntlet, and was rated exceptional. He was then assigned to No. 80 Squadron, which was equipped with the newer Gloster Gladiator. He was confirmed in the rank of Pilot Officer 29 June 1937.

Prototype Gloster Gladiator in flight, now marked K5200.

No. 80 Squadron was sent to Egypt to protect the Suez Canal. With the United Kingdom’s declaration of war on the Axis powers, Pattle and his unit were soon in combat with the Regia Aeronautica (the Italian Royal Air Force) across North Africa. He shot down his first enemy airplanes, a Breda Ba.65 and a Fiat CR.42, on 4 August 1940. Unfortunaely, Pattle was also shot down and he had to walk across the Libyan desert to friendly lines.

Distinguished Flying Cross and Bar

Pattle was promoted to Flight Lieutenant, 3 September 1940. He is credited with having shot down at least 15 Italian airplanes with the Gladiator.

In February 1941, No. 80 Squadron began flying the Hawker Hurricane. This was a huge technological advance over the Gladiator, and the Hurricane’s eight .303-caliber machine guns doubled the firepower of the biplane.  The squadron was sent to Greece, where it would engage the Luftwaffe.

Flight Lieutenant Pattle was awarded the Distinguished Flying Cross, 11 February 1941. The following month, 12 March 1941, Pat Pattle was promoted to Acting Squadron Leader, and given command of No. 33 Squadron at Larissa, Thessaly, Greece. Squadron Leader Pattle was awarded a Bar to his DFC (a second award), 18 March 1941.

Pilots of No. 33 Squadron, Royal Air Force, with a Hawker Hurricane Mk.I fighter, V7419. Pattle is in the first row, seated, fifth from left. (Imperial War Museum)

The Hawker Hurricane Mk. I was 31 feet, 5 inches (9.576 meters) long with a wingspan of 40 feet, 0 inches (12.192 meters), and overall height of 10 feet, 6 inches (3.200 meters). Its empty weight was 5,234 pounds (2,374 kilograms) and maximum gross weight was 6,793 pounds (3,081 kilograms).

The Mk.I’s engine was a liquid-cooled, supercharged, 27.01 liter (1,648.96 cubic inches) Rolls-Royce R.M.1.S. Merlin Mk.III single-overhead-cam 60° V-12, rated at 990 horsepower at 2,600 r.p.m. at 12,250 feet (3,734 meters), and 1,030 horsepower at 3,000 r.p.m., at 10,250 feet (3,124 meters), using 87 octane aviation gasoline. The Merlin III drove the propeller through a 0.477:1 gear reduction ratio. It weighed 1,375 pounds (624 kilograms).

The fixed-pitch propeller was soon replaced with a three-bladed, two-pitch propeller, and then a three-bladed constant-speed propeller. Speed trials of a Mk.I equipped with a 10 foot, 9 inch (3.277 meters) diameter Rotol constant-speed propeller achieved a maximum True Air Speed in level flight of 316 miles per hour (509 kilometers per hour) at 17,500 feet (5,334 meters). The service ceiling was 32,250 feet (9,830 meters). The Mk.I’s range was 600 miles (966 kilometers) at 175 miles per hour (282 kilometers per hour).

The Hurricane Mk.I could climb to 20,000 feet in 9.7 minutes.

The fighter was armed with eight Browning .303 Mark II machine guns mounted in the wings, with 334 rounds of ammunition per gun.

© 2017, Bryan R. Swopes

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