From Surf Wiki (app.surf) — the open knowledge base

Jacobs R-755

225 hp radial aircraft engine

Field	Value
name	R-755 / L-4
image	File:Radial Engine EASM 4Feb2010 (14568077736) (cropped).jpg
caption	Jacobs R-755 on display at the Evergreen Aviation & Space Museum
engine_type	Radial engine
manufacturer	Jacobs Aircraft Engine Company
first_run	1933

The Jacobs R-755 (company designation L-4) is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States by the Jacobs Aircraft Engine Company.

Design and development

The R-755 was first run in 1933 and was still in production in the 1970s. With a bore and stroke of 5.25 in × 5 in (133 mm × 127 mm) the displacement was 757 cu in (12.4 L), power ranged from 200 hp to 350 hp (150 kW - 260 kW). The engine features steel cylinders with aluminum-alloy cylinder heads. An R-755E variant was developed for use in helicopters.

Variants

;R-755A1:The base-line direct drive production version. ;R-755A2:300 hp variant. ;R-755A3:Similar to A1 but with Scintilla magnetoes. ;R-755B1:De-rated version of the R-755A to drive a fixed pitch airscrew. ;R-755B2:De-rated version of the R-755A to drive a variable or controllable pitch airscrew. ;R-755E:Up-rated engine with reduction gearing. ;R-755EH:Developed to power the Jacobs Type 104 Gyrodyne.

Applications

Anahuac Tauro
Beechcraft Model 17 Staggerwing (B17L, C17L, E17L)
Boeing-Stearman PT-18 Kaydet
Cessna AT-17 Bobcat
Cessna 195
Funk F-23
Grumman G-164 Ag Cat
Kellett KD-1
Lascurain Aura
Morane-Saulnier MS.505 Criquet
Waco F series (YMF, YPF)
Waco Custom Cabin series (YOC, YQC)
Waco Standard Cabin series (YKC, YKC-S, YKS-6)
Waco PG-3 (twin-engined powered version of Waco CG-15 glider, prototype only)

Engines on display

A preserved Jacobs R-755 is on display at the Arkansas Air Museum.
A Jacobs R-755 is on public display at the Aerospace Museum of California
A preserved Jacobs R-755 is on display at Super T Aviation Academy in Medicine Hat, Canada.
A restored Jacobs R-755A is on display at the House of Whitley.

Specifications (R-755-A1)

and start a new, fully-formatted line with -- |power/weight=0.48 hp/lb (0.8 kW/kg)

References

(1989). "World encyclopaedia of aero engines". P. Stephens.
Bridgman, Leonard. (1955). "Jane's all the World's Aircraft 1955-56". Jane's all the World's Aircraft Publishing Co. Ltd..
[http://www.arkairmuseum.org/engines/engine-jacobs755.php Arkansas Air Museum - Jacobs R-755] {{Webarchive. link. (2010-12-03 Retrieved: 31 January 2009)
[http://www.houseofwhitley.com/shop/binoculars-and-historical-artifacts/aviation/jacobs-r-755a-7-cylinder-air-cooled-radial-engine-with-3-blade-prop/] Retrieved: March 2017
(1989). "Jane's fighting aircraft of World War II". Military Press.
(1938). "Jane's all the World's Aircraft 1938". Sampson Low, Marston & company, ltd.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

1930s-aircraft-piston-engines aircraft-air-cooled-radial-piston-engines jacobs-aircraft-engines

Want to explore this topic further?

Ask Mako anything about Jacobs R-755 — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report