Tag Archives: Boeing Aircraft Company

23 October 1959

American Airlines’ first Boeing 707-123 airliner, N7501A, is rolled out. (Boeing)

23 October 1959: American Airlines accepted delivery of its first jet airliner, Boeing 707-123 N7501A (serial number 17628, line number 7). The new airplane had made its first flight on 5 October. Christened Flagship Michigan, American Airlines advertised its new 707 as the “Astrojet.”

The Boeing 707 was developed from the earlier Model 367–80, the “Dash Eighty.” It is a four-engine jet transport with swept wings and tail surfaces. The leading edge of the wings are swept at a 35° angle. The airliner had a flight crew of four: pilot, co-pilot, navigator and flight engineer. The airliner could carry a maximum of 189 passengers.

The 707-123 was 145 feet, 1 inch (44.221 meters) long with a wing span of 130 feet, 10 inches (39.878 meters). The top of the vertical fin stood 42 feet, 5 inches (12.929 meters) high. The 707 pre-dated the ”wide-body” airliners, having a fuselage width of 12 feet, 4 inches (3.759 meters). The airliner’s empty weight is 122,533 pounds (55,580 kilograms). Maximum take off weight is 257,000 pounds (116,573 kilograms).

Boeing 707-123 N7501A, American Airlines Astrojet, Flagship Michigan, at Seattle. (American Airlines)

The first versions were powered by four Pratt & Whitney Turbo Wasp JT3C-6 turbojet engines, producing 11,200 pounds of thrust (49,820 kilonewtons), and 13,500 pounds (60.051 kilonewtons) with water injection. This engine was a civil variant of the military J57 series. It was a two-spool axial-flow turbojet engine with a 16-stage compressor and 2 stage turbine. The JT3C-6 was 11 feet, 6.6 inches (3.520 meters) long, 3 feet, 2.9 inches (0.988 meters) in diameter, and weighed 4,235 pounds (1,921 kilograms).

At MTOW, the 707 required 11,000 feet (3,353 meters) of runway to take off.

The 707-123 had a maximum speed of 540 knots (1,000 kilometers per hour). It’s range was 2,800 nautical miles (5,186 kilometers).

In 1961, N7501A was upgraded to the 707-123B standard. This included a change from the turbojet engines to quieter, more powerful and efficient Pratt & Whitney JT3D-1. The JT3D-1 was a dual-spool axial-flow turbofan engine, with a 2-stage fan section, 13-stage compressor (6 low- and 7 high-pressure stages), 8 combustion chambers and a 4-stage turbine (1 high- and 3 low-pressure stages). This engine was rated at 14,500 pounds of static thrust (64.499 kilonewtons) at Sea Level, and 17,000 pounds (75.620 kilonewtons), with water injection, for takeoff (2½ minute limit). Almost half of the engine’s thrust was produced by the fans. Maximum engine speed was 6,800 r.p.m. (N1) and 10,200 r.p.m. (N2). It was 11 feet, 4.64 inches (3.471 meters) long, 4 feet, 5.00 inches (1.346 meters) wide and 4 feet, 10.00 inches (1.422 meters) high. It weighed 4,165 pounds (1,889 kilograms). The JT3C could be converted to the JT3D configuration during overhaul.

The 707-123B wings were modified to incorporate changes introduced with the Boeing 720, and a longer tailplane installed.

N7501A was sold to Tigerair, Inc., 12 April 1978. It was then sold to Cyprus Airways in March 1979, and reregistered 5B-DAM. When landing at Bahrain International Airport, 19 August 1979, the airliner’s nose wheel collapsed and it was damaged beyond economical repair.

Boeing 707-123B 5B-DAM (s/n 17628) at Bahrain International Airport after sustaining damage when its nose wheel collapsed on landing, 19 August 1979. (Steve Fitzgerald/Wikimedia Commons)

The Boeing 707 was in production from 1958 to 1979. 1,010 were built. Production of 707 airframes continued at Renton until the final one was completed in April 1991.

© 2018, Bryan R. Swopes

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16–17 August 1989

Qantas' Boeing 747-438 Longreach VH-OJA, Spirit of Australia. (Aero Icarus)
Qantas’ Boeing 747-438 Longreach VH-OJA, City of Canberra. (Aero Icarus)

16–17 August 1989: On its delivery flight, Qantas’ first Boeing 747-438 Longreach airliner, VH-OJA, City of Canberra, was flown by Captain David Massey-Green from London Heathrow Airport, England (IATA: LHR, ICAO: EGLL) to Sydney Kingsford Smith Airport, Australia (IATA: SYD, ICAO: YSSY), non-stop. Three other senior Qantas captains, Ray Heiniger, George Lindeman and Rob Greenop completed the flight deck crew. Boeing Training Captain Chet Chester was also aboard.

The distance flown by the new 747 was 17,039.00 kilometers (10,587.54 miles) at an average speed of 845.58 kilometers per hour (525.42 miles per hour). The flight’s duration was 20 hours, 9 minutes, 5 seconds. This set a new Fédération Aéronautique Internationale (FAI) World Record for Distance ¹ and World Record for Speed Over a Recognized Course.²

The crew of Qantas Flight 741. Front row, left to right: FSD David Cohen, FSD Mal Callender. Back row, left to right: Captain Ray Heiniger, Captain David Massey-Greene, Captain George Lindeman, Captain Rob Greenop.
The crew of Qantas Flight 7741. Front row, left to right: FSD David Cohen, FSD Mal Callender. Back row, left to right: Captain Ray Heiniger, Captain David Massey-Greene, Captain George Lindeman, Captain Rob Greenop. (Unattributed)
Boeing 747-438 Longreach VH-OJA, City of Canberra at Sydney, Australia, August 1989. The motto, WE FLY FURTHER has been painted on the fuselage in recognition of the new airliner's distance record. (John McHarg)
Boeing 747-438 Longreach VH-OJA, City of Canberra, at Sydney, Australia, August 1989. The motto, WE GO FURTHER has been painted on the fuselage in recognition of the new airliner’s distance record. (John McHarg)

VH-OJA was the first of four Boeing 747-400 airliners ordered by Qantas more than two years earlier. The company named these “Longreach” both to emphasize their very long range capabilities, but also as a commemoration of the first scheduled passenger flight of the Queensland and Northern Territories Aerial Services Ltd. at Longreach, Queensland, 2 November 1922. Qantas named the new airliner City of Canberra. The new 747, the twelfth -400 built, with U.S. registration N6064P, it made its first flight at Seattle with Boeing’s test pilots on 3 July 1989. It was turned over to Qantas on 9 August.

Planning for the record setting flight began almost as soon as the airplane had been ordered. Although the airplane was complete and ready to enter passenger service on arrival at Sydney, certain special arrangements were made. Shell Germany refined 60,000 gallons (227,000 liters) of a special high-density jet fuel and delivered it to Heathrow. Rolls-Royce, manufacturer of the RB211-524G high-bypass turbofan engines, had agreed to specially select four engines to be installed on VH-OJA at the Boeing plant at Everett, Washington.

On the morning of the flight, City of Canberra was towed to the Hold Short position for Runway 28 Right (28R) so as not to use any of the precious fuel while taxiing from the terminal. Once there, its fuel tanks were filled to overflow. The airport fire department stood by as the excess fuel ran out of the tank vents. In the passenger cabin were two Flight Service Directors, FSD David Cohen and FSD Mal Callender, and eighteen passengers including senior executives from Qantas, Boeing, Shell as well as representatives of the Australian news media. The flight crew planned the engine start to allow for the mandatory three-minute warm-up and at approximately 0840 local, called the Tower, using the call sign Qantas 7441, and said that they were ready for takeoff.

A Qantas Boeing 747-438 Longreach, VH-OJU, Lord Howe Island, leaves contrails across the sky. (Unattributed)

After climbing to altitude they began the cruise portion of the flight at Flight Level 330 (33,000 feet or 10,058 meters). As fuel was burned off the airliner gradually climbed higher for more efficiency, eventually reaching a maximum altitude of 45,100 feet (13,746.5 meters) by the time they had reached the west coast of Australia.

QF7441 touched down at Sydney Airport at 2:19 p.m, local time (0419 UTC).

City of Canberra, Qantas' first Boeing 747-400-series airliner, touches down at Sydney Airport, 2:19 p.m., local, 17 August 1989. (Qantas Heritage Collection)
City of Canberra, Qantas’ first Boeing 747-400-series airliner, registered VH-OJA, touches down at Sydney Airport, 2:19 p.m., local, 17 August 1989. (Qantas Heritage Collection) 

For a more detailed description of this flight and its planning, see John McHarg’s article, “The Delivery Flight of Qantas Boeing 747-438 VH-OJA” at:

http://www.aussieairliners.org/b-747/vh-oja/vhoja%20article/vhojastory.html

City of Canberra, VH-OJA, remained in Qantas service until 8 March 2015. The airliner was withdrawn from service and donated to the Historical Aircraft Restoration Society Museum at Illawara Regional Airport (YWOL), New South Wales. Its distance record stood until 10 November 1995 when another Boeing airliner, a 777-200LR with Captain Suzanna Darcy-Henneman in command, set a new distance record.

Qantas' Boeing 747-438 Longreach VH-OJA, City of Canberra, on takeoff, 2011. (Aero icarus)
Qantas’ Boeing 747-438 Longreach VH-OJA, City of Canberra, on takeoff from Sydney, 1999. (Aero Icarus)

The Boeing 747-400 airliner can carry between 416 and 660 passengers, depending on configuration. It is 231 feet, 10 inches (70.6 meters) long with a wingspan of 211 feet, 5 inches (64.4 meters) and overall height of 63 feet, 8 inches (19.4 meters). Empty weight is 394,100 pounds (178,800 kilograms). Maximum takeoff weight (MTOW) is 875,000 pounds (396,890 kilograms). While the prototype was powered by four Pratt and Whitney PW4056 turbofan engines, production airplanes could be ordered with PW4062, General Electric CF6 or Rolls-Royce RB211 engines, providing thrust ranging from 59,500 to 63,300 pounds. The –400 has a cruise speed of 0.85 Mach (567 miles per hour, 912 kilometers per hour) and maximum speed of 0.92 Mach (614 miles per hour, 988 kilometers hour). Maximum range at maximum payload weight is 7,260 nautical miles (13,450 kilometers).

Quantas’ Boeing 747-400 VH-OJA, City of Canberra, final landing at Illawarra Regional Airport, New South Wales, Australia, 15 March 2015. (YSSYguy/Wikipedia)

¹ FAI Record File Number 2201: Distance, 17 039.00 km

² FAI Record File Number 2202: Speed over a recognised course, 845.58 km/h

© 2018, Bryan R. Swopes

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15 July 1916

The first Boeing Model 1, the very first Boeing airplane, at Duwamish River site, near Seattle, Washington, 1916. (Boeing)
The first Boeing Model 1, the very first Boeing airplane, at Duwamish River site, near Seattle, Washington, 1916. (Boeing)

15 July 1916: Timber merchant William Edward Boeing (1881–1956) incorporated the Pacific Aero Products Company, to manufacture airplanes. The factory was a former boat house on the Duwamish River near Seattle Washington. The first aircraft produced was the Boeing Model 1, a single-engine, float-equipped biplane. Less than a year later, the company name was changed to Boeing Airplane Company.

The original Boeing factory has been relocated to the Museum of Flight. (Boeing)
The original Boeing factory has been relocated to the Museum of Flight. (Boeing)

For over 100 years, Boeing has produced commercial and military aircraft. Today, The Boeing Company is the world’s leading aerospace corporation. It employs 159,469 people. Its 2017 revenues were $93,390,000,000. Boeing received orders  for 912 commercial aircraft in 2017, valued at $134,800,000,000. The company’s backlog for commercial airplanes is 5,864. On the military side, the U.S. Army has ordered 268 AH-64 Apache attack helicopters. The company has contracts for 17 P-8A Poseidon maritime patrol aircraft, and is expected to deliver 18 KC-46 tankers in 2018. It has foreign contracts for 36 F-15 Eagles and 28 F-18 Super Hornets.

William Edward Boeing (1981–1956)

Boeing recently unveiled its new 787–10 Dreamliner:

© 2018, Bryan R. Swopes

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1–3 May 1976

Pan American World Airways’ Boeing 747SP-21 N533PA, s/n 21025, renamed Clipper New Horizons in 1977, with the “Flight 50” insignia. (CNN.com)

1–3 May 1976: Pan American World Airways’ Boeing 747SP–21 Clipper Liberty Bell, N533PA, departed New York’s John F. Kennedy International Airport, on a record-setting around the world flight. Under the command of Captain Walter H. Mullikan, the airline’s chief pilot, the flight crew included co-pilots Albert A. Frink, Lyman G. Watt, and flight engineers Frank Cassaniti and Edwards Shields. The airliner carried 98 passengers. The flight set a new speed record for a flight around the world, eastbound, and three speed records for commercial airline routes.

Clipper Liberty Bell flew eastward from New York JFK to Indira Ghandi International Airport (DEL), New Delhi, India, a distance of 8,081 miles (13,005.1 kilometers), at an average speed of 869.63 kilometers per hour (540.363 miles per hour).¹ After servicing the 747, it continued on its journey. The next destination was Tokyo International Airport (HND), Tokyo, Japan. This stage covered 7,539 miles (12,132.8 kilometers). The airliner’s average speed was 421.20 kilometers per hour (261.722 miles per hour).² Striking Pan Am workers at Tokyo delayed preparing the airliner for the next leg of the journey. After refueling, the Pan American flight continued on to its starting point, John F. Kennedy International Airport, New York, New York. This final leg was 7,517 miles (12,097.4 kilometers). The average speed was 912.50 kilometers per hour (567.001 miles per hour).³

The total duration of the flight was 46 hours, 1 second. The actual flight time was 39 hours, 25 minutes, 53 seconds. Total distance flown was 23,137 miles (37,235.4 kilometers). The average speed for the entire flight was 809.24 kilometers per hour (502.838 miles per hour).⁴

Clipper Liberty Bell had been christened in a ceremony at Indianapolis on 30 April 1976 by Betty Ford, First Lady of the United States of America.

In 1977, Captain Mullikin flew the same 747SP on another circumnavigation, 29–31 October 1977, but this time it crossed both the North and South Poles. Renamed Clipper New Horizons, 21025 set 7 world records on that flight, with a total flight time of 54 hours, 7 minutes, 12 seconds. This trip was called “Flight 50.”

The Boeing 747SP (“Special Performance”) is a very long range variant of the 747–100 series airliners. The airplane is 48 feet, 5 inches (14.757 meters) shorter than the –100, the vertical fin is 5 feet (1.5 meters) taller and the span of horizontal stabilizer has been  increased. The weight savings allows it to carry more fuel for longer flights, and it is also faster. The maximum number of passengers that could be carried was 400, with a maximum of 45 on the upper deck. Boeing built 45 747SPs.

The 747SP is 184 feet, 9 inches (56.312 meters) long, with a wingspan of 195 feet, 8 inches (59.639 meters). It has an overall height of 65 feet, 1 inch, at maximum gross weight and 65 feet, 10 inches (19.837–20.066 meters), empty. It has an operating empty weight of 337,100 pounds (152,906 kilograms), and a maximum takeoff weight of 700,000 pounds (317,515 kilograms).

Boeing 747SP three-view illustration with dimensions

The 747SP could be ordered with Pratt & Whitney JT9D- or Rolls-Royce RB211-series engines. These engines had a range of thrust of 43,500–51,980 pounds (193.50–231.22 kilonewtons) for takeoff (5-minute limit), and resulted in variations of the airliner’s empty weight and fuel capacity.

The airliner had a design cruising speed (VC) of 0.86 Mach, and a maximum operating speed (VMO/MMO) of 375 knots KEAS, or 0.92 Mach. The service ceiling is 45,100 feet (13,746 meters) and the design range is 5,830 nautical miles (6,709 statute miles/10,797 kilometers). The fuel capacity is 48,780 U.S. gallons (184,652 liters), and it carries 600 gallons (2,271 liters) of water for engine injection.

Boeing 747SP–21 N40135, c/n 21025, 1 January 1975. (747SP.com)

The record-setting Boeing 747SP-21, serial number 21025, was the fourth Special Performance 747 built, and one of 10 that had been ordered by Pan American World Airways. It first flew 8 October 1975, in Boeing’s corporate paint scheme. It was then retained for use in the test fleet. When flight testing was completed, the airliner was refurbished and repainted in the Pan Am livery. It was delivered to the airline 5 March 1976 and registered N533PA.

While in the Pan Am fleet, N533PA also carried the names Clipper New Horizons, Clipper Young America and Clipper San Francisco.

Pan Am Boeing 747SP–21, N533PA, c/n 21025, renamed Clipper Young America, circa 1985.  It still carries the “Flight 50” insignia. (747SP.com)
Compare this standard Boeing 747–121, Pan American’s Clipper Sea Serpent, N655PA, to the 747SP in the photograph above. (Detail from image by Bruno Geiger)

Pan American sold its fleet of Boeing 747SPs to United Airlines in 1986. 21025 was re-registered N143UA to reflect its new ownership. Twenty years after its first flight, 21025 was removed from service in 1995 and placed in storage at Ardmore, Oklahoma. It was scrapped in December 1997. The airliner had accumulated 78,941 total flight hours on its airframe (TTAF) with 10,733 cycles.

United Air Lines’ Boeing 747SP–21 N143UA, c/n 21025. (747SP.com)

¹ FAI Record File Number 5671

² FAI Record File Number 5669

³ FAI Record File Number 1338

⁴ FAI Record File Number 5670

© 2019, Bryan R. Swopes

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18 March 1939

Boeing Model 307 Stratoliner NX19901 taking of at Boeing Field, Seattle, Washington. (San Diego Air & Space Museum Archives)

18 March 1939: At 12:57 p.m., Pacific Standard Time (19:47 G.M.T.), the Boeing Model S-307 Stratoliner, NX19901, took off from Boeing Field, Seattle, Washington, on Test Flight No. 19. Julius Augustus Barr was the pilot in command.

The S-307, Boeing serial number 1994, was a prototype four-engine, pressurized commercial airliner. It had first flown on 31 December 1938, with Boeing’s Chief of Flight Test, Edmund Turney (“Eddie”) Allen, as first pilot (the Pilot in Command), and Julius Barr as his copilot. Allen had flown the first eighteen flights. “The performance of aircraft NX 19901 on flights prior to Test Flight No. 19 had either met or exceeded the manufacturer’s estimates.”

Julius Barr was employed by Boeing as a test pilot, 16 November 1938. Following Flight Test No. 15, Allen approved Barr to act as first pilot on the Model 307. He first served as the pilot in command of NX19901 on 21 January 1939. This was a taxi test, with the Stratoliner never leaving the ground. Barr first flew the airplane nearly two months later, 16 March 1939, with copilot Earl Alvin Ferguson. Barr made two more flights on 17 March. Harlan Hull, Chief Pilot of Transcontinental and Western Air, Inc., flew as copilot.

At takeoff on 18 March 1939, Barr had only 2 hours, 6 minutes as pilot in command of the Boeing 307; and 17 hours, 55 minutes as second in command. He had flown as an observer aboard NX19901 for 1 hour, 52 minutes.

There were ten persons on board the Stratoliner for Test Flight No. 19. In addition to Julius Barr as P.I.C., the designated copilot was Earl Ferguson. There were two alternate copilots, Harlan Hull and Benjamin J. Pearson, an assistant sales manager for Boeing. Ralph LaVenture Cram was first aerodynamcist, assisted by John Kylstra. William C. Doyle served as oscillograph operator, and Harry T. West, Jr., was the engineering officer. These were all Boeing employees. Pieter Guillonard, technical director of Koninklijke Luchtvaart Maatschappij N.V. (KLM Royal Dutch Airlines), acted as recorder and photographer, while Albert Gillis von Baumhauer, an engineer with the Luchtvaartdienst (the Dutch Aviation Authority), acted as an assistant aerodynamicist.

Albert G. von Baumhauer

Specialized test equipment had been installed at the copilot’s position. For this reason, Von Baumhauer, rather than the designated copilot, Ferguson, was in the copilot’s seat during this test flight. (Von Baumgartner held a Dutch private pilot certificate, issued 28 November 1931. Since that time, he had flown only 116 hours, and had no experience flying multi-engine aircraft. He was not qualified to act as copilot.)

Guillonard and Von Baumhauer had recommended a series of tests to be conducted on Test Flight No. 19, including observing the airplane’s behavior following an engine cut on takeoff with no rudder input; a series of side slips and stall tests. Von Baumhauer had emphasized “complete stalls” rather than initiating recovery when stall was detected.

After takeoff, NX19901 climbed to 10,000 feet (3,048 meters) and at 140 miles per hour (225 kilometers per hour) a series of static longitudinal stability tests were performed. According to the test flight plan, side slips were to be investigated next.

Boeing 307 Stratoliner NX19901 with both propellers on right wing feathered. Note the rudder deflection. (Boeing)

     “At 1:12 P.M. (PST) a radio message was transmitted from NX 19901 to the Boeing Aircraft Company radio station located at Seattle, Washington, which message gave the position of the aircraft as being between Tacoma Washington and Mount Rainier at an altitude of 11,000 feet. Some two or three minutes later, while flying at a comparatively slow rate of speed in the vicinity of Alder, Washington, the aircraft stalled and began to spin in a nose down attitude. After completing two or three turns in the spin, during which power was applied, it recovered from the spin and began to dive. The aircraft partially recovered from the dive at an altitude of approximately 3,000 feet above sea level, during which recovery it began to disintegrate. Outboard sections of the left and right wings failed upward and broke entirely loose from the aircraft. Major portions of the vertical fin and portions of the rudder were carried away by wing wreckage. The outboard section of the left elevator separated from the stabilizer and both fell to the ground detached. The right horizontal tail surface, being held on by the fairing long the top surface and also by the elevator trim tab cables, remained with the fuselage. The No. 1 engine nacelle also broke loose from the aircraft and fell to the ground separately. The main body of the aircraft settled vertically and struck the ground in an almost level attitude both longitudinally and laterally at a point approximately 1,200 feet above sea level. Watches and clocks aboard the aircraft, which were broken by the force of the impact, indicated the time of the accident at approximately 1:17 p.m. (PST).”

AIR SAFETY BOARD REPORT, at Pages 34–35.

Diagram of probable flight path of NX19901 from Air Safety Board report.

All ten persons aboard were killed in the crash. The Stratoliner was destroyed. Because of the water ballast in the main fuel tanks, there was no post crash fire.

Wreckage of Boeing Model 307 Stratoliner NX19901, right rear quarter.
Wreckage of Boeing Model 307 Stratoliner NX19901, right front quarter.
Wreckage of Boeing Model 307 Stratoliner NX19901 near Alder, Washington
Wreckage of Boeing Model 307 Stratoliner NX19901 near Alder, Washington. (SDASM)
Wreckage of Boeing Model 307 Stratoliner NX19901, left front quarter.

During the crash investigation it was found that two B-17s had previously been spun. The first,

“. . . while flying with a gross load of about 42,000 pounds at an altitude of 14,000 feet, went into an inadvertent spin and made two complete turns before recovery was effected. During the pull-out from the ensuing dive, permanent distortion occurred in the structure of both wings, necessitating the installation of new wings on the aircraft.

     “In the second of these experiences, a similar ship was intentionally permitted to enter a spin following a complete stall. The controls were immediately reversed and the aircraft responded promptly, enabling the pilot to effect recovery after three-fourths of a turn in—

     “Evidence indicated that power was used in recovery from the spin in the case of NX 19901. It should be noted that in the two instances above described recovery from spin in similar aircraft was accomplished without the employment of power. In one of these cases, permanent distortion occurred in both wings.”

AIR SAFETY BOARD REPORT, at Pages 48 and 49.

Diagram of wing failure under load. (Air Safety Board Report)

PROBABLE CAUSE

     “Structural failure of the wings and horizontal tail surfaces due to the imposition of loads thereon in excess of those for which they were designed, the failure occurring in an abrupt pull-out from a dive following recovery from an inadvertent spin.”

Crash site diagram. (Air Safety Board Report)
Boeing Model 307 Stratoliner NX19901. The engine cowlings have been removed. The inboard right engine is running. The arrangement of passenger windows differs on the right and left side of the fuselage. (San Diego Air & Space Museum Archives)

The Boeing Model 307 was operated by a crew of five and could carry up to 33 passengers.  It was the first pressurized airliner and, because of its complexity, it was also the first airplane to include a flight engineer as a crew member. It could maintain a cabin pressure equivalent to 12,000 feet (3,650 meters) to a pressure altitude of 19,000 feet (5,791 meters).

The Model 307 used the wings, tail surfaces, engines and landing gear of the production B-17B Flying Fortress heavy bomber. The vertical fin and rudder were of the same design as the B-17B’s, though somewhat larger. The fuselage was circular in cross section to allow for pressurization. It was 74 feet, 4 inches (22.657 meters) long with a wingspan of 107 feet, 3 inches (32.690 meters) and overall height of 20 feet, 9½ inches (6.337 meters). The wings had 4½° dihedral and 3½° angle of incidence. The empty weight was 29,900 pounds (13,562.4 kilograms) and loaded weight was 45,000 pounds (20,411.7 kilograms).

The airliner was powered by four air-cooled, geared and supercharged, 1,823.129-cubic-inch-displacement (29.875 liter) Wright Cyclone 9 GR-1820-G102 9-cylinder radial engines with a compression ratio of 6.7:1, rated at 900 horsepower at 2,200 r.p.m., and 1,100 horsepower at 2,200 r.p.m. for takeoff. These drove three-bladed Hamilton-Standard Hydromatic propellers through a 0.6875:1 gear reduction in order to match the engine’s effective power range with the propellers. The GR-1820-G102 was 4 feet, 0.12 inches (1.222 meters) long, 4 feet, 7.10 inches (1.400 meters) in diameter, and weighed 1,275 pounds (578 kilograms).

The maximum speed of the Model 307 was 241 miles per hour (388 kilometers per hour) at 6,000 feet (1,828.8 meters). Cruise speed was 215 miles per hour (346 kilometers per hour) at 10,000 feet (3,048 meters). The service ceiling was 23,300 feet (7,101.8 meters).

Boeing Model 307 Stratoliner NX19901 with all engines running. (San Diego Air & Space Museum Archives)

Julius Augustus Barr was born at Normal, Illinois, 6 December 1905. He was the son of Oren Augustus Barr, a teacher and school superintendent, and Margaret M. Wallace Barr. He grew up in Pittsburg, Kansas. He attended the Kansas State Teachers College at Pittsburg in 1925. He was a member of the Alpha Gamma Tau (ΑΓΤ) fraternity, of which he was the treasurer.

Julius Augustus Barr

Barr enlisted in the Air Corps, United States Army, and was trained as a pilot at Brooks and Kelly Fields, San Antonio, Texas.

On 1 July 1928, Julius Barr married Miss Effie Hortense Roberson at Pittsburg, Kansas. They would have two children, Jo Anne Barr, and Gene Edward Barr.

In 1930, Barr and his family lived in Cheyenne, Wyoming. He flew as an air mail pilot, and was employed by Boeing Air Transport.

During the mid 1930s, the Barr family traveled to China, where he acted as manager of the airport at Hankow, and conducted flight training. He then flew as the personal pilot of Zhang Xueliang (also known as Chang Hseuh-Liang), (“The Young Marshal”). Zhang and another of other communist generals arrested Chiang Kai-Shek in the Xi’an Incident, December 1936. Chiang was released after two weeks, and Zhang placed under house arrest for the remainder of his life. (The others were executed.) Julius Barr then served as the personal pilot for Soong Mei-ling (“Madame Chiang”), and helped General Chang with the air defense of Shanghai during the Second Sino-Japanese War.

Barr and his family departed Hong Kong aboard S.S. Empress of Russia, which arrived at Victoria, British Columbia, Canada, 14 November 1938. He then went to work as a test pilot for Boeing two days later.

Julius Barr had flown a total of approximately 5,000 hours. Of these, 2,030 hours were in single-engine airplanes, 2,240 hours in twin-engine, and 765 hours in 3 engine.

Julius Augustus Barr was buried at the Mount Olive Cemetery, Pittsburg, Kansas.

© 2019, Bryan R. Swopes

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