Continental R-670 Explained

The Continental R-670 (factory designation W670) was a seven-cylinder four-stroke radial aircraft engine produced by Continental displacing 668 cubic inches (11 litres) and a dry weight of 465lb. 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 primary training aircraft of the U.S. military.^[1]

In addition to being used in aircraft, the R-670 was used in a number of light armored vehicles of World War II.

Variants

Data from: Jane's All the World's Aircraft 1938^[2] Variants of the W670 included:

W670-K:carburetor, 5.4:1 compression, 65 Octane, front exhausts and 225abbr=onNaNabbr=on

W670-L:carburetor, 5.4:1 compression, 73 Octane, rear exhausts and 225abbr=onNaNabbr=on

W670-M:carburetor, 6.1:1 compression, 80 Octane, front exhausts and 240abbr=onNaNabbr=on

W670-N:carburetor, 6.1:1 compression, 80 Octane, rear exhausts and 240abbr=onNaNabbr=on

W670-K1:fuel injection, 5.4:1 compression, 73 Octane, front exhausts and 230abbr=onNaNabbr=on

W670-L1:fuel injection, 5.4:1 compression, 73 Octane, rear exhausts and 230abbr=onNaNabbr=on

W670-M1:fuel injection, 6.1:1 compression, 80 Octane, front exhausts and 250abbr=onNaNabbr=on

W670-N1:fuel injection, 6.1:1 compression, 80 Octane, rear exhausts and 250abbr=onNaNabbr=on

Applications

Aircraft

• American Airmotive NA-75
• Boeing-Stearman Model 75 (PT-17, N2S)
• CallAir Model A
• Cessna 190
• Eagle Aircraft Eagle 220
• Fairchild PT-23
• Funk F-23
• G class blimp
• Grumman G-164 Ag Cat
• Kellett K-2A, K-4
• Morane-Saulnier MS.317
• Timm N2T Tutor
• Waco 240-A
• Waco Standard Cabin series (UEC, UIC, UKC, UKC-S, UKS, VKS)
• Waco Custom Cabin series (UOC, VQC)
• Waco A series (UBA, ULA)
• Waco F series (UBF, UMF, UPF)

Armored fighting vehicles

• T2 Combat Car
• T4 Combat Car
• M1 Combat Car
• M2 Light Tank
• M3 Stuart
• Landing Vehicle Tracked (LVT-2, -4; LVT(A)-1, -2, -4, -5)

References

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.
• Book: Jane's All the World's Aircraft 1938. 1938. Sampson, Low & Martin company Limited. London.

External links

• https://web.archive.org/web/20070807212519/http://www.oldengine.org/members/diesel/Duxford/usaero1.htm

Notes and References

1. Gunston 1989, p.42.
2. Book: Jane's All the World's Aircraft 1938. 1938. Sampson, Low & Martin company Limited. London.