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

Continental Continental may refer to: Places * Continental, Arizona, a small community in Pima County, Arizona, US * Continental, Ohio, a small town in Putnam County, US Arts and entertainment * ''Continental'' (album), an album by Saint Etienne * Continen ...

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. 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 an American biplane formerly used as a military Trainer (aircraft), trainer aircraft, of which at least 10,626 were built in the United States during the 1930s and 1940s. Stearman Aircraft became a subsidiary o ...

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 characteristic ...

of the

U.S. military The United States Armed Forces are the military forces of the United States. U.S. federal law names six armed forces: the Army, Marine Corps, Navy, Air Force, Space Force, and the Coast Guard. Since 1949, all of the armed forces, except th ...

.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 (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

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 __NOTOC__ The American Airmotive NA-75 was an agricultural aircraft marketed in the United States in the 1960s, created by remanufacturing military surplus Boeing Stearman trainers. The aircraft were fitted with completely new, high-lift wings, ...

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

(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 d ...

Cessna 190 Cessna () is an American brand of general aviation aircraft owned by Textron Aviation since 2014, headquartered in Wichita, Kansas. Originally, it was a brand of the Cessna Aircraft Company, an American general aviation aircraft manufacturing ...

* Eagle Aircraft Eagle 220 *

Fairchild PT-23 The Fairchild PT-19 (company designation Fairchild M62) is an American monoplane primary trainer aircraft that served with the United States Army Air Forces, RAF and RCAF during World War II. Designed by Fairchild Aircraft, it was a contemp ...

* Funk F-23 *

G class blimp The ''G''-Class Blimps were a series of non-rigid airships (blimps) used by the United States Navy. In 1935, instead of developing a new design airship, the Navy purchased the Goodyear Blimp ''Defender'' for use as a trainer and utility airship ...

* Grumman G-164 Ag Cat * Kellett K-2A, K-4 *

Morane-Saulnier MS.317 The Morane-Saulnier MS.315 was a primary training monoplane designed and built in France by Morane-Saulnier. Development The MS.315 was developed from the earlier MS.300 primary trainer and related variants and first flew in October 1932. The ...

* Timm N2T Tutor * Waco 240-A *

Waco Standard Cabin series The Waco Standard Cabin series is a range of United States, 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 th ...

(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 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 range and baggag ...

(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 192 ...

(UBF, UMF, UPF)

Armored fighting vehicles

T2 Combat Car T, or t, is the twentieth letter of 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 de ...

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 * the ...

M1 Combat Car The M1 combat car, officially Light Tank, M1, was a light tank used by the United States Cavalry in the late 1930s and developed at the same time as the U.S. Army Infantry Branch's very similar Light Tank, M2. After the Spanish Civil War, mos ...

M2 Light Tank The M2 light tank, officially Light Tank, M2, was an American light tank of the interwar period which saw limited service during World War II. The most common model, the M2A4, was equipped with one M5 gun and five .30 cal M1919 Browning mac ...

M3 Stuart The M3 Stuart/light tank M3, was a US light tank of World War II, first entered service in the British Army in early 1941 and saw action in the North African campaign in July 1941. Later an improved version of the tank entered service as the ...

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

(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