It is the Charles B. Kirkham Airplane & Motor Co, located in Savona, NY.

-He was the famous designer of the K-6 and K-12 engines that were built by Curtiss when Charles was the Chief Engineer of the brand.

-Before, in 1910, he made the B-4 that gave 40 hp at 1,400 rpm.

“Kirkham B-4”

-The B-4 had 4 water-cooled cylinders and direct transmission to the propeller.

“Another 4-cylinder at a US Museum” (AEHS)

The B-6 with 6 cylinders and architecture similar to the B-4 gave 50 hp, but later this became 55 hp at 1,300 rpm.

The Kirkham B-6 engine is from 1911. We show this engine in the picture below.

“Kirkham B-6”

-It gave 55 hp at 1,300 rpm, and it was installed on at least two aircraft, the Burgess Hydroplane F and the Thomas TA.

“Kirkham B-6 on a biplane”

The BG-6 gave 76 hp. It was a geared B-6 version with the propeller rotating at 960 rpm while the engine did it at 1,680 rpm.

“BG-6”

-In 1912 the B-12 came out, a possible predecessor of the K-12, which was made by Curtiss.

“Kirkham-Curtiss K-12”

-The 6-cylinder version of the K-12 was the K-6.

“Kirkham-Curtiss K-6”

-In 1911 another 4-cylinder was made, the C-4 with 45-50 hp, a water-cooled in line engine.

-Possibly with a displacement of 300 cu. in. and gearbox, as it was the case with the B-6 and BG-6.

-At the Smithsonian Museum in Washington there is exposed a horizontally-opposed, 6-cylinder engine.

- But it is the case that there is another Kirkham photographed by Gary Brossett of the AEHS in which the opposed cylinders are in vertical position. See engine mounts and magnetos.

“Two views of the Kirkham vertically-opposed cylinder engine”

From Appendix 6: From the PopMech magazine, a photo of a Kirkham engine with a propeller but installed on a river barge and on an pedestal that is adjustable by a rear pole to create traction in all directions for getting out of trouble on any stretch of the river.

-The Kirkham engine is a six-cylinder, possibly a B-6 for the architecture that we can see. We also see the upright radiator at the rear.

“The engine assembly installed on the front of the barge” (PiP = pm)

-As it says the engine is manufactured by C.B. Kirkham of Savona, N.Y.

From Appendix 10: We have new photos of the Kirkham B-6 used in various devices of the time (1912) with which Kirkham established and won tests.

“The B-6 is a 6-cylinder giving 50 hp”

“Kirkham B-6, side view”

-In the year 1912 the Kirkham brand, by Charles B. Kirkham offered four models of aviation engines:

-The B-4 model with 35 hp, weighing 185 lbs.

-The B-6 model with 50 hp, weighing 235 lbs.

-The B-G-6 model with 70 hp, weighing 255 lbs

-And the B-12 Model with 120 hp, weighing 400 lbs

-As we see the power-to-weight ratios is less than satisfactory, doubling in excess the index of the weight to power ratio that for many years was 1: 1, generally accepted.

-Today it is less due to the lighter materials that are used.