Continental A65 Engine Manual
A65/O-170 Continental O-170 on display at the Type Manufacturer The Continental O-170 engine is the collective military designation for a family of small aircraft engines, known under the company designation of A50, A65, A75 and A80. The line was designed and built by commencing in the 1940s. It was employed as the powerplant for civil and military light aircraft. The horizontally opposed, four-cylinder engines in this family are all identical in appearance, bore, stroke, dry weight, and piston displacement. All feature a bottom-mounted fuel delivery system. The higher power variants differ only in compression ratio and maximum allowable rpm, plus minor modifications. The lower power versions are fully convertible to the higher rated versions.
Contents. Design and development In all models of this family of engines the cylinder heads are of alloy, screwed and shrunk onto barrels. Inserts and intake valve seats are made from aluminum- alloy, while the exhaust valve seats are steel. The engines all employ hydraulic tappets which operate in aluminum guides that are machined into the.
The tappets are built from four parts, a cam follower body, cup, cylinder, and piston and operate with clearances of 0.03 in (1 mm) to 0.11 in (3 mm). The are steel and feature pressed-in ball ends.
Lubricating oil is delivered under pressure from the 4 US qt (3.79 L) oil sump to the drive bearings and the crankpins through the crankshaft. The cylinder walls and pistons are spray lubricated. Normal operating oil pressure is 35 psi, with minimum idle oil pressure 10 psi. Variants A50 50 hp (37 kW), Compression ratio 5.4:1, max rpm 1,900, fuel consumption at cruise 3.8 US gph A50-1 A50-2 A50-3 A50-4 A50-5 A50-6 A50-7 A65 65 hp (48 kW), Compression ratio 6.3:1, max rpm 2,300, fuel consumption at cruise 4.4 US gph. The exhaust valves have faces. The pistons have three, although some early production A65s had four piston rings.
A65-1 A65-2 A65-3 A65-4 A65-5 A65-6 A65-7 A65-8 A65-8F A65-9: A65-85? A75 75 hp (56 kW), Compression ratio 6.3:1, max rpm 2,600, fuel consumption at cruise 4.8 US gph. The exhaust valves have stellite faces and the connecting rods have a 0.125 in (3 mm) hole drilled in the rod cap to improve lubrication. The pistons have three rings and smaller piston pins.
A75-1 A75-2 A75-3 A75-4 A75-5 A75-6 A75-14 A80 80 hp (60 kW), Compression ratio 7.55:1, max rpm 2,700, fuel consumption at cruise 5.2 US gph. The connecting rods have a 0.125 in (3 mm) hole drilled in the rod cap to improve lubrication.
The pistons have five rings and smaller piston pins. A80-1 A80-2 A80-3 A80-4 A80-5 A80-6 A80-8 O-170 Military designation for the A50, A65, A75, A80 family of engines. O-170-1 O-170-3 O-170-5 O-170-7 Applications A50. A65.
A Continental A65-8F installed in a. A75.
A80. Specifications (O-170-3 or A-65-8) Data from Continental Aircraft Engine Operator's Manual General characteristics. Type: 4-cylinder air-cooled aircraft piston engine. Bore: 3.875 in (98 mm). Stroke: 3.625 in (92 mm).
Displacement: 171 in³ (2.8 L). Length: 31 in (787 mm). Width: 31.5 in (800 mm). Height: 29 5/16 in (745 mm). Dry weight: 170 lb (77 kg) Components.: One intake and one exhaust valve per cylinder, -actuated. Fuel system: Updraft. Fuel type: 80/87.
Oil system:. Cooling system: Air-cooled Performance. Power output: 65 hp (48 kW) at 2,300 rpm.: 0.38 hp/in³ (17.1 kW/L).: 6.3:1.
Continental A65 Engine Manual
Fuel consumption: 4.4 US gal/hr. Oil consumption: maximum desirable 0.37 US quarts/hr.: 0.38 hp/lb (0.62 kW/kg) See also Comparable engines. Related lists. Notes. ^ Christy (1983). ^ Teledyne Continental Motors: Continental Aircraft Engine Operator's Manual, pages 4-5.
Teledyne Continental Motors, FAA Approved December 1980. Continental Form No. X30012.
^ Wooden props (2008). Archived from the original on 2013-12-28. Retrieved 2008-12-13. CS1 maint: BOT: original-url status unknown.
Jackson (1974). Plane & Pilot: 1978 Aircraft Directory, page 153. Werner & Werner, 1978.
References Wikimedia Commons has media related to. Christy, Joe: Engines for Homebuilt Aircraft & Ultralights, pages 43–52.
TAB Books, 1983. Donald, David (1995). American Warplanes of World War II. New York: Barnes & Noble Books. Jackson, A.J. British Civil Aircraft since 1919 Volume 3.
London: Putnam. Instruction Manual Continental Models A50, A65, A75 and A80 Aircraft Engines. Muskegon, Michigan: Continental Motors Corporation.
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