Jacobs Aircraft Engine Company
Encyclopedia
The Jacobs Aircraft Engine Company was formed in 1929 in Philadelphia. Later the company moved to Pottstown, Pennsylvania
.
An early product was the Jacobs L-3, a small 55 hp
3 cylinder
engine
of 1929 (4.125x4.75=190cuin). By 1933
, Jacobs had developed its most famous engine, the L-4 seven-cylinder radial; it was better known as by its military designation, the R-755
.
Later developments included the 285 hp L-5
or R-830 (5.5x5=831.54/13.627L), and 330 hp L-6
or R-915 (5.5x5.5=914.696/14.989L)
Jacobs engines were fitted to many US-built aircraft of the inter-wars period, including several Waco
models.
After World War II, Jacobs became a division of Republic Industries (not Republic Aircraft).
Pottstown, Pennsylvania
Pottstown is a borough in Montgomery County, Pennsylvania, United States northwest of Philadelphia and southeast of Reading, on the Schuylkill River. Pottstown was laid out in 1752–53 and named Pottsgrove in honor of its founder, John Potts. The old name was abandoned at the time of the...
.
An early product was the Jacobs L-3, a small 55 hp
Horsepower
Horsepower is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts.Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the...
3 cylinder
Cylinder (engine)
A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels. Multiple cylinders are commonly arranged side by side in a bank, or engine block, which is typically cast from aluminum or cast iron before receiving precision machine work...
engine
Engine
An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...
of 1929 (4.125x4.75=190cuin). By 1933
1933 in aviation
This is a list of aviation-related events from 1933:- Events :* The United States Coast Guard requests authorization to construct its first cutters with a capability of carrying aircraft.* Tokyo conducts it first blackout exercise....
, Jacobs had developed its most famous engine, the L-4 seven-cylinder radial; it was better known as by its military designation, the R-755
Jacobs R-755
|-See also:-Bibliography:*Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9*Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7...
.
Later developments included the 285 hp L-5
Jacobs R-830
|-See also:-Bibliography:*Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9-External links:*...
or R-830 (5.5x5=831.54/13.627L), and 330 hp L-6
Jacobs R-915
|-See also:-Bibliography:*Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9*Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7...
or R-915 (5.5x5.5=914.696/14.989L)
Jacobs engines were fitted to many US-built aircraft of the inter-wars period, including several Waco
Waco Aircraft Company
The Waco Aircraft Company was an aircraft manufacturer located in Troy, Ohio, USA. Between 1919 and 1947, the company produced a wide range of civilian biplanes....
models.
After World War II, Jacobs became a division of Republic Industries (not Republic Aircraft).
Products
- Jacobs L-3
- Jacobs R-755Jacobs R-755|-See also:-Bibliography:*Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9*Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7...
/L-4 - Jacobs R-830Jacobs R-830|-See also:-Bibliography:*Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9-External links:*...
/L-5 - Jacobs R-915Jacobs R-915|-See also:-Bibliography:*Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9*Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7...
/L-6