The Jacobs R-830 or L-5 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States, production started in 1935.
[Gunston 1989, p.85.]
Design and development
The R-830 was effectively an enlargement of the
R-755 with strengthened stressed parts. With a
bore and
stroke
A stroke is a medical condition in which poor blood flow to the brain causes cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functionin ...
of 5.0 in × 5.5 in (140 mm × 127 mm) the
displacement
Displacement may refer to:
Physical sciences
Mathematics and Physics
*Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object). The actual path ...
was 831 cu in (13.6 L), takeoff power was around 285 hp (212 kW). The engine features steel
cylinders with aluminum-alloy
cylinder head
In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber.
In sidevalve engines, the head is a simple sheet of metal; whereas in more modern ov ...
s.
Applications
*
Beechcraft Model 18
The Beechcraft Model 18 (or "Twin Beech", as it is also known) is a 6- to 11-seat, twin-engined, low-wing, tailwheel light aircraft manufactured by the Beech Aircraft Corporation of Wichita, Kansas. Continuously produced from 1937 to November ...
*
Beechcraft Staggerwing
The Beechcraft Model 17 Staggerwing is an American biplane with an atypical negative wing stagger (the lower wing is farther forward than the upper wing). It first flew in 1932.
Development
At the height of the Great Depression, aircraft ...
*
Fleet 50
The Fleet 50 Freighter was a Canadian twin-engine biplane general utility aircraft designed and built by Fleet Aircraft. This peculiar-looking aircraft had promise as a freighter and general use aircraft, but it was underpowered and only five we ...
*
Fleetwings Sea Bird
The Fleetwings Sea Bird (or Seabird) was an American-built amphibious aircraft of the 1930s.
Design and production
The Sea Bird was an amphibious utility aircraft designed in 1934–1935 by James C. Reddig for Fleetwings, Inc., of Bristol, Penns ...
*
Howard DGA-8
The Howard DGA-8, DGA-9, DGA-11, and DGA-12 were a family of four-place, single-engine, high-wing light monoplanes built by the Howard Aircraft Corporation, Chicago, Illinois from 1936.
Development
The various models were distinguished by differ ...
*
Waco S Series
The Waco S Series is a family of American cabin biplanes produced by the Waco Aircraft Company starting in 1935.
Development and designations
The Waco closed cabin biplanes, initially known as the C (for Cabin) series were all unequal span, stag ...
Specifications (L-5)
See also
References
Notes
Bibliography
*Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989.
External links
The Jacobs Engine - Nanton Lancaster Society
{{US military piston aeroengines
1930s aircraft piston engines
Aircraft air-cooled radial piston engines
Jacobs aircraft engines