Sometimes mentioned as a "Langley" engine. It was actually a Manly.

-Samuel Pierpoint Langley was a precursor of aviation and already in 1896 he tried out his “Aerodrome” on the Potomac River, lacking power for such a machine, going directly to the water.

“The Aerodrome”

-Optimistic representation of the Aerodrome flight attempt.

-It really collapsed right in front of the floating structure.

From Appendix 6: Samuel P. Langley, an American aviation pioneer, has been located in the NASM files with the steam engine that was used on the Aerodrome No 5 in 1896.

“Steam engine components”

-On the Aerodrome A of 1903 used the Manly (Langley-Manly) engine (see Manly) that gave 52 HP at 950 rpm, weighing 135 pounds.

“Langley-Manly engine on test bench”

-The Aerodrome A engine was rotary radial engine with 5 cylinders that was protected between wheels.