Based on La Hire's theorem and with the intention of “breaking” with the James Watt's connecting-rod system, the basis of all current piston engines.

“Le Grand”

-They had the intention of eliminating the "rocking" of the connecting rods. The proposed system is of rigid pistons and connecting rods (see Bourke).

-In 1910, Burlat in Lyon made a bi-rotary radial engine with the La Hire method. The same as Pouit, a disciple of Pescara.

We can see that the fresh air enters through the bottom of the piston, formed with the intake valve, which allows it to cool as well.

-The exhaust flows through the cylinder head valve with a truncated conical shape that facilitates the Atkinson phenomenon and automatic evacuation of gases.