Jump to content

Lycoming O-435

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Ahunt (talk | contribs) at 19:09, 2 September 2022 (→Variants: certification dates from ref cited). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

O-435
Type Piston tank and aircraft engine
National origin United States
Manufacturer Lycoming Engines
First run 1939
Major applications Beechcraft Bonanza
Bell 47
Helio Courier
Hiller OH-23 Raven
M22 Locust
Stinson L-5 Sentinel
Produced 1942–1975 out of production
Developed from Lycoming O-290

The Lycoming O-435 is an American six-cylinder, horizontally opposed fixed-wing aircraft and helicopter engine made by Lycoming Engines. The engine is a six-cylinder version of the four-cylinder Lycoming O-290.

Design and development

The powerplant is a horizontally opposed Lycoming six-cylinder design. It is a direct-drive or geared, air-cooled, and normally aspirated engine. The cylinders have steel barrels with aluminum heads, and the valves are operated by hydraulic lifters. The crankshaft is supported in an aluminum-alloy split case by four main bearings and one ball-thrust bearing, and lubricating oil is supplied from a 12 quart wet sump. The camshaft rides in journals that do not employ bearing inserts. The accessory housing supports two magnetos, a starter, a generator, and a dual tach drive. A spare mounting pad is included for a vacuum pump.

Variants

All engines have an additional prefix preceding the 435 to indicate the specific configuration of the engine. There are also numerous engine suffixes, denoting different accessories such as different manufacturers' carburetors, or different magnetos.

O-435
Baseline engine model, producing 175 hp (130 kW) at 2300 rpm, with a compression ratio of 6.25:1, a dry weight of 347 lb (157 kg) and fitted with a Marvel MA-4 carburetor. Type certified on February 11, 1942.[1]
O-435-A
Engine model producing 190 hp (142 kW) at 2550 rpm, with a compression ratio of 6.5:1, a dry weight of 348 lb (158 kg) with a -8 magneto and 342 lb (155 kg) with a -20 magneto and fitted with a Marvel MA-4-5 or PS-5C carburetor. Type certified on February 11, 1942.[1]
O-435-A2
Engine model producing 225 hp (168 kW) at 3000 rpm, with a compression ratio of 7.5:1, a dry weight of 365 lb (166 kg) and fitted with a Marvel MA-4-5 carburetor. Type certified on October 19, 1949 and cancelled on February 25, 1944.[1]
O-435-A3
Type certified on January 5, 1951 and cancelled on February 8, 1955.[1]
O-435-B (military designation O-435-5)
Engine model producing 235 hp (175 kW) at 3000 rpm, with a compression ratio of 7.5:1, a dry weight of 362 lb (164 kg) and fitted with a Marvel MA-4-5 carburetor. Type certified on October 7, 1943 and cancelled on November 2, 1950.[1]
O-435-C (military designation O-435-1)
Engine model producing 175 hp (130 kW) at 2300 rpm, with a compression ratio of 6.25:1, a dry weight of 356 lb (161 kg) and fitted with a Marvel MA-4SPA carburetor. Type certified on January 11, 1943.[1]
O-435-C1 (military designation O-435-11)
Engine model producing 175 hp (130 kW) at 2300 rpm, with a compression ratio of 6.25:1, a dry weight of 366 lb (166 kg) and fitted with a Marvel MA-4 carburetor. Type certified on January 2, 1948.[1]
O-435-C2 (military designation O-435-13)
Engine model producing 175 hp (130 kW) at 2300 rpm, with a compression ratio of 6.25:1, a dry weight of 368 lb (167 kg) and fitted with a Marvel MA-4SPA carburetor. Type certified on January 2, 1948.[1]
O-435-K
Engine model producing 240 hp (179 kW) at 3000 rpm, with a compression ratio of 7.3:1, a dry weight of 405 lb (184 kg) and fitted with a Marvel MA-4-5 carburetor. Type certified on January 24, 1951.[1]
O-435-K1 (military designation O-435-4)
Engine model producing 250 hp (186 kW) at 3000 rpm, with a compression ratio of 7.3:1, a dry weight of 405 lb (184 kg) and fitted with a Marvel MA-4-5 carburetor. Type certified on March 30, 1951.[1]
GO-435
Baseline geared engine model producing 210 hp (157 kW) at 3000 rpm, with a compression ratio of 6.25:1, a dry weight of 407 lb (185 kg) and fitted with a Marvel MA-4-5 carburetor. Type certified on August 30, 1944 and cancelled on November 2, 1950.[1]
GO-435-A2
Type certified on October 19, 1949 and cancelled on February 8, 1955.[1]
GO-435-C2
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 422 lb (191 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on October 19, 1949.[1]
GO-435-C2A
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 438 lb (199 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on January 2, 1951, cancelled on February 8, 1955 and reinstated July 15, 1955.[1]
GO-435-C2A2
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 432 lb (196 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on October 24, 1957.[1]
GO-435-C2B
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 430 lb (195 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on November 6, 1952.[1]
GO-435-C2B1
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 430 lb (195 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on February 8, 1955.[1]
GO-435-C2B2
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 430 lb (195 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on February 28, 1956.[1]
GO-435-C2C
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 422 lb (191 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on November 24, 1953 and cancelled on July 5, 1956.[1]
GO-435-C2D
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 420 lb (191 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on July 20, 1954 and cancelled on July 5, 1956.[1]
GO-435-C2E
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1, a dry weight of 420 lb (191 kg) and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on September 27, 1956.[1]
GO-435-D1
Geared engine model producing 260 hp (194 kW) at 3400 rpm for takeoff, with a compression ratio of 7.3:1 and fitted with a Marvel MA-4-5 or PS-5BD carburetor. Type certified on September 25, 1953.[1]
XO-435-1
XO-435-3
(GO-435)
O-435-5
(O-435-B)
O-435-6
O-435-7
(O-435-B1)
O-435-9
O-435-11
O-435-13
O-435-A
O-435-B
O-435-C
O-435-D
GO-435
GO-435-B
TVO-435
270 hp (201 kW)
TVO-435-A
TVO-435-25
260 hp (194 kW)
VO-435
200 hp (149 kW)
VO-435-23
250 hp (186 kW)
VO-435-B1B

Applications

A Lycoming TVO-435 installed in a Bell 47G
Aircraft
Other

Specifications (O-435-D)

Data from Jane's.[2]

General characteristics

  • Type: Six-cylinder horizontally-opposed gasoline piston engine
  • Bore: 4.875 in (123.8 mm)
  • Stroke: 3.875 in (98.4 mm)
  • Displacement: 434 cu in (7.1 L)
  • Width: 33.5 in (851 mm)
  • Height: 43.5 in (1,105 mm)
  • Dry weight: 433 lb (196.6 kg)

Components

  • Valvetrain: Overhead valve (OHV, pushrod actuated), one inlet and one exhaust valve per cylinder
  • Fuel system: Marvel-Schebler carburetor
  • Fuel type: 100 octane gasoline
  • Oil system: Pressure pump type
  • Cooling system: Air-cooled by fan (helicopter installations)
  • Reduction gear: Direct-drive

Performance

See also

Related development

Comparable engines

Related lists

References

Notes

  1. ^ a b c d e f g h i j k l m n o p q r s t u v Federal Aviation Administration (June 23, 2010). "Type Certificate Data Sheet No. E-228" (PDF). Archived (PDF) from the original on December 16, 2016. Retrieved September 2, 2022.
  2. ^ Bridgman 1994, p. 78d.

Bibliography

  • Bridgman, Leonard. Jane's All the World's Aircraft 1945-46. Hammersmith, London: HarperCollinsPublishers (1994 reprint). ISBN 000 470831-8

Media related to Lycoming O-435 at Wikimedia Commons

Retrieved from "https://en.wikipedia.org/enwiki/w/index.php?title=Lycoming_O-435&oldid=1108138132"