Briggs &
Stratton in World War Two
Milwaukee, WI
1910-2020
2020-Present owned by KPS Capital Partners
This page added 5-30-2021.
Anyone in the United States who has owned a
gasoline powered lawn mower has had it most likely powered by a Briggs & Stratton
engine. In 1953 the company introduced light-weight aluminum
engines that were found on many mowers of the era. The first
gasoline powered mowers I used for mowing lawns were Briggs & Stratton.
To me, Briggs & Stratton was synonymous with lawn mower engines. I did not realize there were other manufacturers of
the same type engines. For the early mowers, the pull rope was
separate from the engine. To start it, the rope had to be manually wrapped
around the engine pulley.
With this sort of background, I expected to
find examples of small gasoline engines used for various
applications. The one that is most prevalent in restored military
equipment are Briggs & Stratton generators to power multiple gun mounts.
This is a Briggs & Stratton gasoline powered generator for an M45 Quad
Mount anti-aircraft gun. Author's photo.
Briggs & Stratton won the Army-Navy "E"
Award in August 1942.
Briggs & Stratton World War Two
Production: P.E. 75 120vac
at 22 amps 2400 watt engine model 223 generators, at least 2,160 Model
300 PC-1 12 VDC 300 watt generators, at least 13,070 Model 304 12 VDC 300 watt generators, 67,236 S18LG-P1 and S18RG-P1 General
Electric Aircraft Magnetos
M33 and M45 Gun Mounts
Accepted by Detroit Ordnance, US Army
The information below comes from "Summary Report of
Acceptances, Tank-Automotive Material, 1940-1945."
Published by Army Services Forces, Office, Chief of
Ordnance-Detroit, Production Division, Requirements and
Progress Branch
January 21, 1946.
This table includes the type of Briggs & Stratton generator used in each type of gun mount. |
Mount Type |
Briggs & Stratton Generator |
1942 |
1943 |
1944 |
Total |
Multiple Caliber .50 Machine Gun Mount M33 |
Model 300 PC-1 12 VDC 300 Watt |
428 |
1,732 |
|
2,160 |
Multiple Caliber .50 Machine Gun Mount M45 |
Model 304 PC-1 12 VDC 300 Watt |
|
7,715 |
5,355 |
13,070 |
Total Combined M33 and M45 |
|
428 |
9,447 |
5,355 |
15,230 |
This is an exploded view of the Briggs &
Stratton one-cylinder gas engine used in the PC-1 series.
Image is from TM_9-1223.
This is an exploded view of the Briggs & Stratton DC generator used
in the PC-1 series. Image is from TM_9-1223.
This M16 half-track was on display at the
2021 Findlay, OH Military Show. This particular M16, named "The
African Queen" by the owner, has been on display at the National Museum
of the United States Air Force since December 2020. For the
Findlay Military Show, the owner temporarily removed it from the museum
for it to be part of the Findlay event. This allowed me to obtain
photos of the gun mount and Briggs & Stratton engine not afforded me at
the National Museum of the USAF. Author's photo.
Author's photo.
Author's photo.
I was allowed to climb up into the rear of the vehicle that allowed a
photo of the top of the engine. Author's photo.
Author's photo.
The data plate for the Briggs & Stratton
engine on "The African Queen" shows that it is serial number 15519.
Author's photo.
There was a second M16 at the 2021 Findlay
Military Show. Author's photo.
The M45 Quad Mount on this M16 is
operational and has a battery installed which used the Briggs & Stratton
engine and generator charged. The battery then operates the
traversing and elevation system on the gun mount. Author's photo.
The pull rope can is stowed just at the
bottom and rear of the engine. There is no data plate on this
unit. Author's photo.
This Multiple Caliber .50 Machine
Gun Mount M45 is mounted on a small trailer and was used for fixed
anti-aircraft gun positions. The small wheels on the trailer
hindered the movement of the unit. The Briggs & Stratton engine
can be seen mounted in the rear of the gun mount.
The M17 trailer was another method of
transporting the M45 during World War Two. With the larger tires,
it had good mobility. The Briggs & Stratton engine is visible to
the rear of the gun mount. Author's photo.
While small motor generator units like the
P-1 series used on M45 Quad Gun Mounts were adapted from Briggs &
Stratton's pre-war commercial product line, the manufacture of General
Electric aircraft magnetos were not. This R-2800-59 built by Pratt
& Whitney has two GE magnetos on it that were manufactured under license
by Briggs & Stratton. This engine and magnetos are on display at
the Evansville Wartime Museum in Evansville, IN. The P-47 in the
background was one of 6,225 that was built during World War Two just a
mile to the south of its current location. Author's photo.
The GE-designed magnetos are called
turtleback magnetos due their distinctive shape. Author's photo.
Author's photo.
This is the General Electric magneto on the
right side of the engine. Author's photo.
I was completely surprised to find that a
company that is most well-known for its lawnmower engines had built
aircraft magnetos to help win World War Two. In 1947 General
Electric published a book that told of its efforts in assisting the war
effort. The book, entitled "Men and Volts at War" is very
comprehensive on all of the products that GE built during World War Two.
However, there is no mention of aircraft magnetos either being designed
or manufactured by the company. Obviously, GE designed aircraft
magnetos because the data plates on the magnetos note they are of
General Electric design. Apparently, with all of the other
products it needed to produce for the war effort, it did not have the
manufacturing capacity to build the magnetos, and the work was given to
Briggs & Stratton. With no evidence that GE built any magnetos,
this implies that Briggs & Stratton built all of them.
On this particular magneto, the serial number
and other information is not legible. Author's photo.
The left hand magneto is serial number 132724.
Both magnetos are Type s18LG-P1. Author's photo.
This is a cross sectional view of a GE
aircraft magneto.
Pratt & Whitney R-2800 Engines built with General
Electric-Designed S18LG-P1 and S18RG-P1 Aircraft Magnetos |
R-2800 Model |
Magneto Model |
Number of Engines Built |
Manufacturer |
Aircraft Type |
R-2800-59 |
S18LG-P1 |
592 |
Pratt
& Whitney East Hartford, CT |
P-47C, D, L |
R-2800-59 |
S18LG-P1 |
10,799 |
Ford
River Rouge, MI |
P-47C, D, L |
R-2800-65 |
S18LG-P1 |
1,292 |
Pratt
& Whitney East Hartford, CT |
P-61A,B |
R-2800-65 |
S18LG-P1 |
517 |
Nash-Kelvinator
Kenosha, WI |
P-61A,B |
R-2800-71 |
S18LG-P1 |
1,726 |
Ford
River Rouge, MI |
Douglas JD-1, A-26B, C |
R-2800-73 |
S18RG-P1 |
2,665 |
Chevrolet Tonawanda, NY |
P-61C, P-47N |
R-2800-75 |
S18LG-P1 |
8,042 |
Ford
River Rouge, MI |
C-46 |
R-2800-79 |
S18LG-P1 |
6,617 |
Ford
River Rouge, MI |
Douglas JD-1, A-26B |
R-2800-81 |
S18RG-P1 |
362 |
Pratt
& Whitney Kansas City |
P-47N |
R-2800-83 |
S18RG-P1 |
855 |
Chevrolet Tonawanda, NY |
Designed for the A-26D which was not produced. The
engine was later used in the
Vought AU-1 in Korea. |
R-2800-85 |
S18LG-P1 |
62 |
Chevrolet Tonawanda, NY |
Early C-82As |
95 |
S18RG-P1 |
9 |
Pratt
& Whitney East Hartford, CT |
C-118/DC-6 -President Truman's Independence |
103 |
S18RG-P1 |
80 |
Pratt
& Whitney East Hartford, CT |
C-131B |
Total Engines |
|
33,618 |
|
|
Every engine had two magnetos implying that
Briggs & Stratton built 67,236 magnetos for OEM engines plus spares and
spare parts.
This Ford-built R-2800 is on display at the
Yankee Air Museum. The R-2800-7x is either an R-2800-71, 75, or 79
engine, as it is not possible to identify the last digit on the data
plate. It is one of these three types as it has the GE magnetos on it. Author's photo.
Author's photo.
Author's photo.
The right magneto is type S18LG-P1 and
serial number 212618. Author's photo.
The left magneto on the engine is serial number 208823 Author's photo.
This Chevrolet-built Pratt and Whitney
R-2800 engine is on display at the National Museum of WWII Aviation in
Colorado Springs, CO. It is equipped with Briggs & Stratton
magnetos. Author's photo.
The engine is part of a larger display
showing how the Republic P-47 super turbocharger system worked. Author's photo.
This P-47N is located at the Peterson Air and
Space Museum at Peterson AFB in Colorado Springs, CO. It has a
Chevrolet Tonawanda, NY-built R-2800-73 engine in it. Author's photo.
The left Briggs & Stratton-built magneto is
visible at the top of the engine. Author's photo.
This P-47D Razorback is on display at the
National Museum of the United States Air Force. It has either a
Pratt & Whitney or Ford-built R-2800-59 engine installed in it.
Most likely it is a Ford-built R-2800-59, as there were 20 times more of
them built than the Pratt & Whitney version. Author's photo.
The distinctive turtle back magnetos built
by Briggs & Stratton are visible at the top of the engine.
Author's photo.
This P-61B is undergoing restoration at the
Mid-Atlantic Air Museum in Reading, PA. Author's photo.
The R-2800-65 with the P-61 was built by
either Nash-Kelvinator or Pratt & Whitney. In either case, the
engine has Briggs & Stratton-built magnetos on it. Author's photo.
This P-61C is on display at the National
Museum of the United States Air Force. The P-61C featured the higher performance
R-2800-73 that Chevrolet was assigned to build and equipped with Briggs
& Stratton-built GE magnetos. Author's photo.
Ford built 6,617 R-2800-79 engines with the
Briggs & Stratton-built GE magnetos for the A-26B. Author's photo.
The Curtiss C-46 Commando was the largest
twin engine transport used by the US in World War Two. 8,042
R-2800-75 engines with Briggs & Stratton-built GE-designed magnetos were
built by the Ford Motor Company for the C-46.
Author's Photo.
|