Keystone Aircraft Corporation was an early pioneer in airplane manufacturing. Headquartered in Bristol, Pennsylvania

Bristol, Pennsylvania

Bristol is a borough in Bucks County, Pennsylvania, northeast of Philadelphia opposite Burlington, N.J. on the Delaware River. Bristol was first incorporated in 1720. Although its charter was revised in 1905, the original charter remains in effect, making Bristol one of the older boroughs in...

, it was formed as Ogdensburg Aeroway Corp in 1920

1920 in aviation

This is a list of aviation-related events from 1920:- Events :*Juan de la Cierva y Cordoniu invents the autogyro. His first autogyro, the Cierva C.1, fails to become airborne, but is the first aircraft to demonstrate the principle of autorotation as it taxis on the ground.*The Argentine Navy...

 by Thomas Huff and Elliot Daland, but its name was quickly changed to Huff-Daland Aero Corp, then to the Huff-Daland Aero Company. The company made a name for itself in agricultural aircraft, and then in the United States Army Air Corps

United States Army Air Corps

The United States Army Air Corps was a forerunner of the United States Air Force. Renamed from the Air Service on 2 July 1926, it was part of the United States Army and the predecessor of the United States Army Air Forces , established in 1941...

' early bomber aircraft. From 1924

1924 in aviation

This is a list of aviation-related events from 1924:- Events :* Violating the Treaty of Versailles, Germany establishes a secret training base for German pilots at Lipetsk in the Soviet Union...

, James McDonnell was the chief designer.

In 1926

1926 in aviation

This is a list of aviation-related events from 1926:- Events :* United Airlines established.* Award of the Harmon Trophy begins. A set of three trophies is awarded annually to the worlds outstanding aviator, aviatrix , and aeronaut for the year, and a fourth trophy is awarded to the outstanding...

, Huff left the company, and it was soon purchased by Hayden, Stone & Co.

Hayden, Stone & Co.

Hayden, Stone & Co. was a major securities firm founded in 1892 by Charles Hayden and Galen L. Stone. The firm was acquired by Cogan, Berlind, Weill & Levitt in 1972 and was part of what ultimately would become Shearson/American Express in 1981.-History:...

, who increased capital to $1 million (United States) and renamed it Keystone. In 1928

1928 in aviation

This is a list of aviation-related events from 1928:- Events :* The Soviet Unions First Five-Year Plan begins, placing a high priority on the construction of new aircraft factories...

, it merged with Loening and was known as Keystone-Loening. In 1929, it was taken over by Curtiss-Wright

Curtiss-Wright

The Curtiss-Wright Corporation was the largest aircraft manufacturer in the United States at the end of World War II, but has evolved to largely become a component manufacturer, specializing in actuators, aircraft controls, valves, and metalworking....

. Keystone became a manufacturing division of Curtiss-Wright and ceased production in 1932

1932 in aviation

This is a list of aviation-related events from 1932:- Events :* The Canadian Siskins aerobatic team is retired.* James Work founds the Brewster Aeronautical Corporation.-January:...

.

Lieut. Comdr. Noel Davis and Lieut. Stanton H. Wooster were killed in their Keystone Pathfinder

Keystone Pathfinder

|-References:*...

 American Legion while conducting a test flight, just days before they were to attempt a trans-Atlantic flight for the Orteig Prize

Orteig Prize

The Orteig Prize was a $25,000 reward offered on May 19, 1919, by New York hotel owner Raymond Orteig to the first allied aviator to fly non-stop from New York City to Paris or vice-versa. On offer for five years, it attracted no competitors...

.

Aircraft Models

• Huff-Daland TA-6, TW-5, AT-1, AT-2
  Huff-Daland TW-5
  The Huff-Daland Type XV Training Water-Cooled TW-5 was a biplane trainer designed by the Huff-Daland Aero Corporation in the early 1920s for the United States Army Air Service.-Design and development:...
  
   biplane observation/trainers (1923-1925)
• Huff-Daland XB-1
  Huff-Daland XB-1
  |-See also:-External links:***...
  
   Twin-engine experimental military bomber biplane (1927)
• Keystone PK-1
  Naval Aircraft Factory PN
  The Naval Aircraft Factory PN was a series of open cockpit American flying boats of the 1920s and 1930s. A development of the Felixstowe F5L flying boat of the First World War, variants of the PN were built for the United States Navy by Douglas, Keystone Aircraft and Martin.-Development and...
  
   flying boat, a licence-produced PN-12
  Naval Aircraft Factory PN
  The Naval Aircraft Factory PN was a series of open cockpit American flying boats of the 1920s and 1930s. A development of the Felixstowe F5L flying boat of the First World War, variants of the PN were built for the United States Navy by Douglas, Keystone Aircraft and Martin.-Development and...
  
  
• Keystone LB-5A/LB-6/LB-7
  Keystone LB-5
  -References:NotesBibliography* Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions, 1989, p. 559.* World Aircraft Information Files. London: Bright Star Publishing, File 899 Sheet 09.-External links:* * * *...
  
   Twin-engine twin-tail series of light bomber biplanes, 60 produced 1927-1929
• Keystone B-3A/B-4A/B-5A/B-6A
  Keystone B-3
  |-See also:-References:NotesBibliography* Andrade, John. U.S. Military Aircraft Designations and Serials since 1909. Leicester, UK: Midland Counties Publications, 1979, pp. 43, 135. ISBN 0-904597-22-9....
  
   Twin-engine single-tail series of bomber biplanes, 127 produced 1930-1933
• Keystone K-47 Pathfinder
  Keystone Pathfinder
  |-References:*...
  
   Three-engine biplane (1927)
• Keystone K-55 Pronto
  Keystone Pronto
  |-References:*...
  
    (1928)
• Keystone-Loening K-84 Commuter  Single-engine amphibious biplane (1929)
• Keystone-Loening K-85 Air Yacht
  Keystone-Loening Air Yacht
  |-References:*...
  
   Single-engine amphibious biplane (1929)
• Keystone NK
  Keystone NK
  -External links:*...
  
   Naval biplane trainer (1928)
• Keystone PK Twin-engine amphibious biplane (1930)