The Sperry Messenger was an American single-seat biplane designed by Alfred V. Verville working for the Engineering Division of the United States Army Air Service (USAAS) and built under contract by Sperry Aircraft Company of Farmingdale, New York. The aircraft was later designated the M-1 and MAT by the USAAS. Sperry produced approximately 50 Messengers and the civilian two-seat version, the Sport Plane, between 1920 and 1926. The aircraft was the first to make contact between an airplane and an airship while in flight.[1]

M-1 Messenger
Role	Single-seat communications biplane Type of aircraft
Manufacturer	Sperry Aircraft
Designer	Alfred Verville
First flight	1921
Primary user	United States Army Air Service
Number built	42

Development

In 1921 Alfred V. Verville led the Engineering Division of the USAAS's design of a simple single-seat biplane to be used as a messenger aircraft to replace motorcycles. The aircraft was built by the Sperry Aircraft Company as the Sperry Messenger. The Messenger was a conventional biplane with a fixed tailskid landing gear and a nose-mounted 60 hp (45 kW) Lawrance L-4 radial engine. In 1924 the military aircraft were given USAAS designations M-1, M-1A and MAT. Lawrence Sperry gained attention when he landed his personal Messenger in front of the Capitol building and bounced up the front steps in Washington D.C. (See photo below.)[2] He also successfully landed his little Messenger at the Lincoln Memorial.[3] The prototype was used by Lawrence Sperry who disappeared in 1923, flying a Messenger across the English Channel from France to England.[3][4][5]

In 1922, Lawrence converted the Messenger into a private sport plane, one that could be kept in an ordinary garage and was easy to fly. Lawrence demonstrated his new achievement in a dramatic way. Angered because the government was slow to make payments on his contracts, Lawrence fueled the plane and flew to Washington to strike a telling blow against the bureaucracy. Circling the Capitol at ground level to disrupt Congress, he landed directly on the Capitol steps and stormed into the office of the Assistant Secretary of the Navy.[3]

Operational history

The Messenger's small size, simple construction, and inexpensive cost made it ideal for testing and experimentation. As well as the original communications duties, the National Advisory Committee for Aeronautics used one in its pioneering aerodynamic research programs from 1923 to 1929. Sperry modified twelve into the radio-controlled Messenger Aerial Torpedo, an early flying bomb, and developed the apparatus for a Messenger to make the first successful airship hook on and release in December 1924.[1] On December 15, at Scott Field, Illinois, Lt. Clyde Finter hooked on to a trapeze attached to a non-rigid airship, the TC-3. In the Messenger, Finter remained attached briefly while the airship made a turn, then he unhooked and landed the aircraft on the ground.[6]

Variants

Messenger

Sperry designation, 42 built later given USAAS designations M-1, M-1A and MAT.

M-1

Messengers used in communications duties, 26 built and known by the USAAS as the Verville-Sperry M-1[7]

M-1A

Messengers with increased fuel capacity, 16 built.

MAT

Messengers used as aerial torpedoes (Messenger Aerial Torpedo), eight conversions.

Operators

 United States

• United States Army Air Service

Specifications (M-1)

General characteristics

• Crew: 1
• Length: 17 ft 9 in (5.41 m)
• Wingspan: 20 ft 0 in (6.10 m)
• Height: 6 ft 9 in (2.06 m)
• Wing area: 160 sq ft (14.86 m²)
• Empty weight: 623 lb (283 kg)
• Gross weight: 862 lb (391 kg)
• Powerplant: × Lawrance L-4 , 60 hp (45 kW)

Performance

• Maximum speed: 97 mph (156 km/h, 84 kn)
• Rate of climb: 700 ft/min (3.56 m/s)

Armament

• none

Gallery

See also

Related lists

• List of military aircraft of the United States

References

Notes

Bibliography

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
• The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing. p. 2955.

External links

Wikimedia Commons has media related to Verville-Sperry M-1 Messenger.

• Cradle of Aviation Museum
• NASA History Publication (see section titled The Case of the Sperry Messenger)

На других языках

[it] Verville-Sperry M-1 Messenger