The Continental R-670 (factory designation W670) was a seven-cylinder four-cycle radial aircraft engine produced by

Continental Continental may refer to: Places * Continent, the major landmasses of Earth * Continental, Arizona, a small community in Pima County, Arizona, US * Continental, Ohio, a small town in Putnam County, US Arts and entertainment * ''Continental'' ( ...

displacing 668 cubic inches (11 litres) and a dry weight of . Horsepower varied from 210 to 240 at 2,200 rpm. The engine was the successor to Continental's first radial engine, the 170 hp

Continental A-70 Continental may refer to: Places * Continent, the major landmasses of Earth * Continental, Arizona, a small community in Pima County, Arizona, US * Continental, Ohio, a small town in Putnam County, US Arts and entertainment * ''Continental'' (al ...

. This engine was used on many aircraft in the 1930s and 1940s. The R-670 was widely used in the

PT-17 Stearman The Stearman (Boeing) Model 75 is a biplane formerly used as a military trainer aircraft, of which at least 10,626 were built in the United States during the 1930s and 1940s. Stearman Aircraft became a subsidiary of Boeing in 1934. Widely kno ...

primary

training aircraft A trainer is a class of aircraft designed specifically to facilitate flight training of pilots and aircrews. The use of a dedicated trainer aircraft with additional safety features—such as tandem flight controls, forgiving flight characteristi ...

of the

U.S. military The United States Armed Forces are the military forces of the United States. The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is the ...

.Gunston 1989, p.42. In addition to being used in aircraft, the R-670 was used in a number of light armored vehicles of

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

Variants

''Data from:'' Jane's All the World's Aircraft 1938 Variants of the W670 included: ;W670-K:carburetor, 5.4:1 compression, 65 Octane, front exhausts and ;W670-L:carburetor, 5.4:1 compression, 73 Octane, rear exhausts and ;W670-M:carburetor, 6.1:1 compression, 80 Octane, front exhausts and ;W670-N:carburetor, 6.1:1 compression, 80 Octane, rear exhausts and ;W670-K1:fuel injection, 5.4:1 compression, 73 Octane, front exhausts and ;W670-L1:fuel injection, 5.4:1 compression, 73 Octane, rear exhausts and ;W670-M1:fuel injection, 6.1:1 compression, 80 Octane, front exhausts and ;W670-N1:fuel injection, 6.1:1 compression, 80 Octane, rear exhausts and

Applications

Aircraft

* American Airmotive NA-75 *

Boeing-Stearman Model 75 The Stearman (Boeing) Model 75 is a biplane formerly used as a military trainer aircraft, of which at least 10,626 were built in the United States during the 1930s and 1940s. Stearman Aircraft became a subsidiary of Boeing in 1934. Widely known ...

(PT-17, N2S) *

CallAir Model A The Call-Air Model A is an American two- to three-seat utility aircraft designed by the Call brothers and built by the Call Aircraft Company, later developed into a successful line of agricultural aircraft. Design and development The Model A was ...

Cessna 190 The Cessna 190 and 195 Businessliner are a family of light single radial engine powered, conventional landing gear equipped, general aviation aircraft which were manufactured by Cessna between 1947 and 1954.Montgomery, MR & Gerald Foster: ...

* Eagle Aircraft Eagle 220 * Fairchild PT-23 *

Funk F-23 The Funk F-23 was an agricultural aircraft produced in the United States during the 1960s. It was designed by Donald Funk using the fuselage frame of military surplus Fairchild PT-23 trainers as a starting point. The resulting aircraft was a l ...

* G class blimp * Grumman G-164 Ag Cat * Kellett K-2A, K-4 * Morane-Saulnier MS.317 *

Timm N2T Tutor The Timm N2T Tutor is an American training monoplane built by the Timm Aircraft Corporation for the United States Navy as the N2T-1. Design and development The Timm S-160 (or Timm PT-160K) was a conventional tandem open-cockpit monoplane trai ...

* Waco 240-A *

Waco Standard Cabin series The Waco Standard Cabin series is a range of American single-engine 4–5 seat fabric covered cabin biplanes produced by the Waco Aircraft Company beginning in 1931 with the QDC and continuing until 1942 when production ended for the VKS-7F.Brandl ...

(UEC, UIC, UKC, UKC-S, UKS, VKS) *

Waco Custom Cabin series The Waco Custom Cabins were a series of up-market single-engined four-to-five-seat cabin sesquiplanes of the late 1930s produced by the Waco Aircraft Company of the United States. "Custom Cabin" was Waco's own description of the aircraft which des ...

(UOC, VQC) *

Waco A series The Waco A series is a range of light United States, American-built twin side-by-side seater sporting biplanes of the early 1930s. Development The Waco A series was introduced in 1932 as an affordable private-owner aircraft with cross-country ra ...

(UBA, ULA) *

Waco F series The Waco F series is a series of American-built general aviation and military biplane trainers of the 1930s from the Waco Aircraft Company. Development The Waco 'F' series of biplanes supplanted and then replaced the earlier 'O' series of 1927 ...

(UBF, UMF, UPF)

Armored fighting vehicles

T2 Combat Car T, or t, is the twentieth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''tee'' (pronounced ), plural ''tees''. It is der ...

T4 Combat Car T4 or T-4 may refer to: Airports and airlines * Heathrow Terminal 4 * Tiyas Military Airbase, also known as the T-4 Airbase Biology and medicine * T4 phage, a bacteriophage * Thyroxine (T4), a form of thyroid hormone * the T4 spinal nerve * ...

M1 Combat Car The M1 Combat Car, officially Light Tank, M1, was a light tank used by the U.S. Cavalry in the late 1930s and developed at the same time as the infantry's very similar M2 light tank. After the Spanish Civil War, most armies, (including the U.S. ...

* M2 Light Tank *

M3 Stuart The M3 Stuart/Light Tank M3, was an American light tank of World War II. An improved version of the tank entered service as the M5 in 1942 to be supplied to British and other Commonwealth forces under lend-lease prior to the entry of the U.S. ...

Landing Vehicle Tracked The Amphibious Vehicle, Tracked (LVT) is an amphibious warfare vehicle and amphibious landing craft, introduced by the United States Navy and United States Marine Corps. (The USN and USMC use "L" to designate Amphibious vessels, also c ...

(LVT-2, -4; LVT(A)-1, -2, -4, -5)

Specifications (R-670-K)

References

Notes

Bibliography

* Gunston, Bill. ''World Encyclopaedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. * ''Jane's Fighting Aircraft of World War II''. London. Studio Editions Ltd, 1998. *

External links

* https://web.archive.org/web/20070807212519/http://www.oldengine.org/members/diesel/Duxford/usaero1.htm {{US military piston aeroengines 1930s aircraft piston engines Aircraft air-cooled radial piston engines R-670