Tag Archives: Boeing Airplane Company

16 July 1935

The Boeing 299 is rolled out for the first time, 16 July 1935. (Boeing photograph via Seattle Post-Intelligencer)

16 July 1935: Just over a year after design began, the Boeing Model 299, NX13372, a prototype four engine long range heavy bomber, was rolled out of its hangar at Boeing Field, Seattle, Washington for the first time. The largest land airplane built up to that time, it seemed to have defensive machine guns aimed in every direction. A Seattle Times reporter, Roland Smith, wrote that it was a “flying fortress.” Boeing quickly copyrighted the name.

After several years of testing, the Model 299 went into production as the B-17 Flying Fortress. By the end of World War II, 12,731 B-17 Flying Fortresses had been built by Boeing, Douglas and Lockheed Vega.

Rollout of teh Boeing Model 299, NX13372, prototype XB-17. (Museum of Science and Industry)
Rollout of the Boeing Model 299, NX13372, prototype XB-17. (Museum of Science and Industry via Seattle Post-Intelligencer)

The Boeing Model 299 was a four-engine bomber operated by a crew of eight. It was designed to meet a U.S. Army Air Corps proposal for a multi-engine bomber that could carry a 2,000 pound (907 kilogram) bomb load a distance of 2,000 miles (3,219 kilometers) at a speed greater than 200 miles per hour (322 kilometers per hour). Design of the prototype began in June 1934 and construction was started 16 August 1934. The Air Corps designated it B-299, and later, XB-17. It did not carry a military serial number, being marked with civil registration NX13372.

The Model 299 was 68 feet, 9 inches (20.955 meters) long with a wingspan of 103 feet, 9–3/8 inches (31.633 meters) and height of 14 feet, 11–5/16 inches (4.554 meters). Its empty weight was 21,657 pounds (9,823 kilograms). The maximum gross weight was 38,053 pounds (17,261 kilograms).

The prototype was powered by four air-cooled, supercharged, 1,690.54-cubic-inch-displacement (27.703 liter) Pratt & Whitney Hornet S1E-G nine-cylinder radial engines which were rated at 750 horsepower at 2,250 r.p.m., each, and 875 horsepower at 2,300 r.p.m. for takeoff. They turned 11 foot, 6 inch (3.505 meters) diameter, three-bladed Hamilton Standard Hydromatic constant-speed propellers through a 3:2 gear reduction. The S1E-G was 4 feet, 1.38 inches (1.254 meters) long, 4 feet, 6.44 inches (1.383 meters) in diameter and weighed 1,064 pounds (483 kilograms)

Cockpit of the Boeing Model 299. (U.S. Air Force)
Cockpit of the Boeing Model 299. (Boeing)

In flight testing, the Model 299 had a cruise speed of 204 miles per hour (328 kilometers per hour) and a maximum speed of 236 miles per hour (380 kilometers per hour) at 10,000 feet (3,048 meters). The service ceiling was 24,620 feet (7,504.2 meters). The maximum range was 3,101 miles ( kilometers). Carrying a 2,573 pounds (1,167 kilograms) load of bombs, the range was 2,040 miles (3,283 kilometers).

Boeing XB-17 (Model 299) bombers and front gunners compartment. (U.S. Air Force photo) 060706-F-1234S-007
Nose turret of the Boeing Model 299, with .30-caliber machine gun, photographed 24 July 1935. (Boeing 8195)
Bomb sight position., 9 August 1935. (Boeing 8227-B)

The XB-17 could carry eight 500 pound (227 kilogram) bombs in an internal bomb bay. Defensive armament consisted of five air-cooled .30-caliber Browning machine guns.

Starboard waist gunnner’s position of the Boeing 299. (Boeing)
Starboard waist gunners position, with Browning M2 .50-caliber machine gun and ammunition canisters. (Boeing)

NX13372 was destroyed when it crashed on takeoff at Wright Field, Dayton, Ohio, 30 October 1935. An Army Air Corps pilot making his first familiarization flight neglected to remove the control locks. This incident led directly to the creation of the “check list” which today is used by all aircraft crew members.

Boeing Model 299, left quarter, at Boeing Field, south of Seattle, Washington,August 1935. (Boeing)
Boeing Model 299, NXxxx72, the prototype XB-17. (U.S. Air Force)
Boeing Model 299, NX13372, the prototype XB-17, at Wright Field, Ohio. (U.S. Air Force)
Boeing Model 299, left profile, at Boeing Field, 13 August 1935. (Boeing 8234-B)
Boeing Model 299 NX13372, designated XB-17, at Wright Field, Ohio, 1935. (U.S. Air Force)
Boeing Model 299 NX13372, designated XB-17, at Wright Field, Ohio, 1935. (U.S. Air Force)
Boeing 299 NX13372, all engines running.

© 2018, Bryan R. Swopes

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11–12 July 1999

Amundsen Scott South Pole Station

11–12 July 1999: Jerri Lin Nielsen, M.D., a physician at the Amundsen-Scott South Pole Station, self-biopsied a suspicious breast lump. Results were inconclusive, so the National Science Foundation decided to send additional test equipment and medications to the remote station by military transport.

Brigadier General John I. Pray, Jr., United States Air Force.
Brigadier General John I. Pray, Jr., United States Air Force.

Because of the extreme cold, adverse weather conditions and months of darkness, it was considered too dangerous for an aircraft to attempt landing at the South Pole. A United States Air Force Lockheed C-141B Starlifter of the 62nd Airlift Wing, McChord Air Force Base, Washington, was sent to stage out of Christchurch, New Zealand, in order to air drop the supplies at the South Pole. The mission was commanded by Lieutenant Colonel John I. Pray, Jr., U.S. Air Force.

Departing Christchurch at 2154 UTC, 11 July, with six pallets of medical supplies and equipment as well as fresh food and mail for the remote outpost, the C-141 was joined for the flight by a Boeing KC-135 Stratotanker from the 203rd Air Refueling Squadron, Hawaii National Guard, for inflight refueling. A refueling took place over McMurdo Station and then the Starlifter headed on toward the Pole.

A Boeing KC-135R Stratotanker prepares to refuel a Lockheed C-141B Starlifter. (Richard Seaman)

Amundsen-Scott station personnel set fire to 27 smudge pots arranged in a semi-circle to mark the drop zone, and turned off all outside lighting. When the transport arrived overhead, blowing snow obscured the drop zone and it took the aircrew, flying with night vision goggles, 25 minutes to locate the markers.

The first of six pallets of medical supplies airdropped by the U.S. Air force at Amundsen-Scott South Pole Station, 11 July 1999. (National Science Foundation)
The first of six pallets of medical supplies airdropped by the U.S. Air Force at Amundsen-Scott South Pole Station, 11 July 1999. (National Science Foundation)

At 2230 the C-141 flew over at an altitude of 700 feet (213.4 meters) and dropped two cargo pallets on the first pass and the remaining four on a second. It immediately departed to rendezvous with the KC-135 tanker and both returned to New Zealand.

After a 6,375 mile (10,260 kilometer) round trip, the C-141 touched down at Christchurch at 1225 UTC, 12 July.

Dr. Nielsen’s lump was cancerous. Using the medical supplies that had been air-dropped, she treated herself for the next three months. She was evacuated by air when a Lockheed LC-130H Hercules from the 109th Airlift Wing, New York Air National Guard, picked her up 16 October 1999.

Dr. Nielsen’s cancer eventually metastasized to her liver, bones and brain. Jerri Lin FitzGerald, M.D., died 23 June 2009 at her home in Southwick, Massachusetts.

Her husband, Thomas FitzGerald, said, “She fought bravely, she was able to make the best of what life and circumstance gave her, and she had the most resilience I have ever seen in anyone. She fought hard and she fought valiantly.”

Dr. Jerri Lin Nielsen, 1 March 1952–23 June 2009. (National Science Foundation)
Dr. Jerri Lin Nielsen, 1 March 1952–23 June 2009. (National Science Foundation)

© 2018, Bryan R. Swopes

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8 July 1941

Fortress Mark I, AN521 ‘WP-K’, of No. 90 Squadron RAF based at West Raynham, Norfolk, preparing for take off at Hatfield, Hertfordshire, during an inspection of newly-arrived American aircraft by the Chief of the Air Staff and the US Air Attache. (Photograph by Flight Lieutenant Bertrand John Henry Daventry, Royal Air Force/CH 2873, Imperial War Museum)
Boeing Fortress Mark I AN521, ‘WP-K’, (U.S.A.A.F. serial number 40-2052) of No. 90 Squadron R.A.F., based at West Raynham, Norfolk, preparing for take off at Hatfield, Hertfordshire, during an inspection of newly-arrived American aircraft by the Chief of the Air Staff and the U.S. Air Attache. Photograph by Flight Lieutenant Bertrand John Henry Daventry, Royal Air Force. © IWM (CH 2873)

00DD3437_5056_A318_A85F9DA3980B669B8 July 1941: Three Royal Air Force Boeing Fortress Mk.I heavy bombers departed from their base at RAF Watton to attack Wilhelmshaven, Germany. This was a daylight bombing mission, with the airplanes flying at 30,000 feet (9,144 meters). One bomber diverted to a secondary target because of engine trouble, while the remaining two Fortresses continued to the primary target.

At the very high altitudes flown, the defensive heavy machine guns that gave the airplane its name froze due to the low temperatures and could not be fired. (In standard atmospheric conditions, the temperature at 30,000 feet would be -45 °C., or -49 °F.)

"Vertical aerial reconnaissance of Wilhelmshaven." © IWM (HU 91201)
“Vertical aerial reconnaissance of Wilhelmshaven.” © IWM (HU 91201)

All three aircraft returned safely to their base. The mission was completely ineffective, however.

This was the very first use of the Boeing B-17 Flying Fortress in combat.

Fortress B.I WP-F
Fortress B.I AN530, WP-F (U.S.A.A.F. B-17C 40-2066) (Royal Air Force)

The Boeing Model 299H, designated B-17C, was the second production variant ordered by the U.S. Army Air Corps. 38 were built by Boeing for the U.S. Army Air Corps, but 20 were transferred to Great Britain’s Royal Air Force, designated Fortress Mk.I. (Boeing Model 299T.) They were initially assigned to No. 90 Squadron, Bomber Command. (A 1941 book, War Wings: Fighting Airplanes of the American and British Air Forces, by David C. Cooke, Robert M. McBride & Company, New York, refers to the B-17C in British service as the “Seattle,” which is in keeping with the R.A.F.’s system of naming bombers after cities.)

Of the 20 Fortress Mk.I bombers, 8 were lost in combat or in accidents.

Boeing Fortress Mk.I AN529 at Heathfield, Scotland, after arrival from United States, May 1941. © Imperial War Museum E(MOS) 276

The Boeing B-17C/Fortress Mk.I was 67 feet, 10-9/16 inches (20.690 meters long with a wingspan of 103 feet, 9 inches (31.633 meters) and the overall height was 15 feet, 4½ inches (4.686 meters). The B-17C had an empty weight of 30,900 pounds (14,016 kilograms). The maximum design gross weight was 47,500 pounds (21,546 kilograms).

The B-17C was powered by four air-cooled, supercharged, 1,823.129-cubic-inch-displacement (29.876 liters) Wright Cyclone G666A (R-1820-65)¹ nine-cylinder radial engines with a compression ratio of 6.70:1. The engines were equipped with remote General Electric turbochargers capable of 24,000 r.p.m. The R-1820-65 was rated at 1,000 horsepower at 2,300 r.p.m. at Sea Level, and 1,200 horsepower at 2,500 r.p.m. for takeoff. The engine could produce 1,380 horsepower at War Emergency Power. 100-octane aviation gasoline was required. The Cyclones turned three-bladed, constant-speed, Hamilton-Standard Hydromatic propellers with a diameter of 11 feet, 7 inches (3.835 meters) though a 0.5625:1 gear reduction. The R-1820-65 engine is 3 feet, 11.59 inches (1.209 meters) long and 4 feet, 7.12 inches (1.400 meters) in diameter. It weighs 1,315 pounds (596 kilograms).

Crew members of a No. 90 "RAF Fortress crew at RAF Polebrook July 19, 1941." (IWM CH 3090)
“RAF Fortress crew at RAF Polebrook July 19, 1941.” © IWM (CH 3090)

The B-17C had a maximum speed of 323 miles per hour (520 kilometers per hour) at 25,000 feet (7,620 meters). Its service ceiling was 37,000 feet (11,278 meters) and the maximum range was 3,400 miles (5,472 kilometers).

The Fortress Mk.I could carry 4,800 pounds (2,177 kilograms) of bombs in an internal bomb bay. Defensive armament consisted of one Browning AN-M2 .30-caliber air-cooled machine gun at the nose and four Browning AN-M2 .50-caliber heavy machine guns in dorsal, ventral and waist positions.

Fortress I AN528 (Getty Images/Three Lions)
Royal Air Force Fortress Mk.I AN528 (B-17C 40-2064) prior to being camouflaged. (Getty Images/Three Lions)

© 2018, Bryan R. Swopes

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27 June 1963

27 June 1963: At 09:56:03.0 PDT, Major Robert A. Rushworth, United States Air Force, flying the Number Three North American Aviation X-15 research rocketplane, 56-6672, was air-dropped from the NB-52B Stratofortress mothership, Balls 8, over Delamar Dry Lake in Nevada.

This was the 87th flight of the X-15 Program, and Bob Rushworth’s 14th.

North American Aviation X-15 56-6672 immediately after being dropped by the Boeing NB-52 Stratofortress. (NASA)
North American Aviation X-15 56-6672 immediately after being dropped by the Boeing NB-52 Stratofortress. (NASA)

Rushworth fired the Reaction Motors XLR99-RM-1 engine for 80.1 seconds and accelerated to Mach 4.89 (3,425 miles per hour, 5,512 kilometers per hour). The X-15 climbed to an altitude of 285,000 feet (86,868 meters, 53.98 miles). Rushworth touched down at Edwards Air Force Base after 10 minutes, 28.0 seconds of flight.

Major Rushworth qualified for Astronaut wings on this flight, the second X-15 pilot to do so.

From 1960 and 1966, Bob Rushworth made 34 flights in the three X-15s, more than any other pilot.

Command Pilot Astronaut insignia, United States Air Force
Command Pilot Astronaut insignia, United States Air Force

© 2015, Bryan R. Swopes

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24 June 1993

Boeing B-52 Stratofortress bombers in storage at Davis-Monthan Air Force Base, Tucson, Arizona. (Unattributed)
Boeing B-52 Stratofortress bombers in storage at Davis-Monthan Air Force Base, Tucson, Arizona. (Unattributed)

24 June 1993: In compliance with an arms control treaty between the United States and the Soviet Union, the Aerospace Maintenance and Regeneration Center (AMARC) at Davis-Monthan Air Force Base, Tucson, Arizona, immediately began the destruction of 363 Boeing B-52 Stratofortress strategic bombers.

Boeing B-52s awaiting destruction at Davis-Monthan AFB. (Unattributed)

© 2015, Bryan R. Swopes

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