Experimental engine running on hot air, that is, on the Stirling principle. Spinning at 3,000 rpm it gave 15 HP.

“The Stirling engine” (PiP=ps)

“The Philips engine” (PiP=ps)

-As can be seen, it seems a really practical realization since it measures about 20 inches in length and its construction is solid. It had four horizontal cylinders around the axis (barrel or revolver engine).

-The Philips engine is not fragile like most engines operating with the Stirling cycle that we know. Besides those who have arrived until today are mostly experimental, (see Stirling).

-We take advantage of the opening of this chapter to put another experimental Stirling (not by Philips) that is strange for its connecting-rod system that is said in W.

“Strange Stirling” photo Popsci (PiP=ps)