Lockheed Air Express

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Air Express
Lockheed Vega Air Express NASA GPN-2000-001390.jpg
RolePassenger and Mail transport
National originUnited States
Manufacturer Lockheed
First flightApril 1928
Number built8
Developed from Lockheed Vega

The Lockheed Air Express was the second aircraft design created by the Lockheed Aircraft Company after its founding in 1927; the type first flew in April 1928. [1]

Contents

Description

The Air Express design incorporated the original fuselage of the Vega, but in order to meet the requirements of Western Air Express, the wing was raised to a parasol configuration above the fuselage and the cockpit was moved behind the wing, while a more powerful Pratt & Whitney Wasp engine was fitted to ease operations over the Sierra Nevada mountains. [2] The design was a commercial success for the company although only seven were built, plus one Air Express Special.

Lockheed Vega Utility transport aircraft by Lockheed

The Lockheed Vega is an American six-passenger high-wing monoplane airliner built by the Lockheed Corporation starting in 1927. It became famous for its use by a number of record-breaking pilots who were attracted to the rugged and very long-range design. Amelia Earhart became the first woman to fly the Atlantic solo in one, and Wiley Post used his to prove the existence of the jet stream after having flown around the world twice.

Sierra Nevada (U.S.) mountain range

The Sierra Nevada is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primarily in Nevada. The Sierra Nevada is part of the American Cordillera, a chain of mountain ranges that consists of an almost continuous sequence of such ranges that form the western "backbone" of North America, Central America, South America and Antarctica.

No Air Expresses have survived to the present day. One, registered NR3057, was flown by Roscoe Turner.

Roscoe Turner American airplane racer

Roscoe Turner was a record-breaking American aviator who was a three-time winner of the Thompson Trophy air race and widely recognized by his flamboyant style and his pet Gilmore the Lion.

Variants

Lockheed 3 Air Express
Single-engined passenger and mail transport aircraft, seating between four and six passengers in an enclosed cabin, able to carry up to 1,000-lb (454-kg) of mail, powered by a 410-hp (306-kW) Pratt & Whitney Wasp radial piston engine; seven built.
Air Express Special
One-off version built for Laura Ingalls, for a non-stop trans-Atlantic flight in 1931; one built.

Operators

Flag of Brazil.svg  Brazil
Flag of the United States.svg  United States

American Airlines, Inc. (AA) is a major American airline headquartered in Fort Worth, Texas, within the Dallas-Fort Worth metroplex. It is the world's largest airline when measured by fleet size, revenue, scheduled passengers carried, scheduled passenger-kilometers flown, and number of destinations served. American, together with its regional partners, operates an extensive international and domestic network with an average of nearly 6,700 flights per day to nearly 350 destinations in more than 50 countries. American Airlines is a founding member of Oneworld alliance, the third largest airline alliance in the world. Regional service is operated by independent and subsidiary carriers under the brand name American Eagle.

New York, Rio, and Buenos Aires Line was an airline that operated seaplane service from New York City to Rio de Janeiro, Buenos Aires, and intermediate points on the east coast of South America during the 1920s. It was forced to merge into its competitor, Pan American World Airways, in 1930.

Specifications

Lockheed Air Express 3-view drawing from Aero Digest March 1929 Lockheed Air Express 3-view Aero Digest March 1929.png
Lockheed Air Express 3-view drawing from Aero Digest March 1929

Data from Lockheed Aircraft since 1913 [3]

General characteristics

Pratt & Whitney Wasp series aircraft engine brand

The Pratt & Whitney Wasp was the civilian name of a family of air-cooled radial piston engines developed in the 1930s, 1940s, and 1950s.

Performance

  • Maximum speed: 176 mph (283 km/h; 153 kn) (with NACA cowling)
  • Cruise speed: 151 mph (243 km/h; 131 kn)
  • Range: 750 mi (652 nmi; 1,207 km)
  • Service ceiling: 17,250 ft (5,260 m)
  • Rate of climb: 1,460 ft/min (7.4 m/s)
NACA cowling

The NACA cowling is a type of aerodynamic fairing used to streamline radial engines for use on airplanes and developed by the National Advisory Committee for Aeronautics in 1927. It was a major advance in aerodynamic drag reduction, and paid for its development and installation costs many times over due to the gains in fuel efficiency that it enabled.

See also

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References

Notes
  1. Francillon 1982, p.85.
  2. Francillon 1982, pp. 84–85.
  3. Francillon 1982, p.89.
Bibliography