A hot air engine system (100), wherein the system comprises:
- a. a frame (110),
- b. a displacer chamber (130) coupled to the frame (110);
- c. a displacer (120) disposed inside the displacer chamber (130);
- d. a first reservoir (112) and a second reservoir (116) coupled to the displacer chamber (130), wherein the first reservoir and the second reservoir each comprise a fill cap and a vent;
- e. a trapezoidal frame (160) disposed on top of the displacer chamber (130), wherein a first hinge (140) and a second hinge (150) are attached to the trapezoidal frame (160), wherein the first hinge (140) and the second hinge (150) are disposed on opposing sides of the frame (160), wherein a first arm (142) is pivotally attached to the first hinge (140) and a second arm (152) is pivotally attached to the second hinge (150), wherein the first arm (142) and the second arm (152) extend downward into the displacer chamber (130) and are fixedly attached to the displacer (120), wherein an arm connector (145) connects the first arm (142) to the second arm (152);
- f. an oscillating cylinder assembly (170) comprising a piston cylinder (171), a cylinder rod (174) pivotally attached to a bottom of the piston cylinder (171), forming a pivot point (175), and a brace perpendicular intersecting the cylinder rod (174) near the pivot point (175), wherein the brace has flared ends, wherein the cylinder rod (174) extends into the trapezoidal frame (160) and is connected to the arm connector (145), wherein the cylinder rod (174) forms an airtight connection with the trapezoidal frame (160) via a diaphragm sealing gasket (177), wherein the flared ends of the brace rest upon the first hinge (140) and the second hinge (150);
- g. a piston assembly comprising a piston (176) disposed within and slidably coupled to the piston cylinder (171), and a piston rod (178) fixedly attached to the piston (176) and projecting away from the piston cylinder (170);
- and
- h. a first crankpin (182) comprising a first end and a second end, wherein the first end of the first crankpin is operatively coupled to the piston rod (178), wherein the second end of the first crankpin is operatively coupled to a flywheel (180);
- wherein when hot water is added to the first reservoir (112) and cold water is added to the second reservoir (116), the hot water heats air inside the displacer chamber and the cold water cools said air, wherein heating and cooling of the air causes the displacer (120) to oscillate within the displacer chamber (130), wherein oscillation of the displacer causes the first arm (142) and the second arm (152) to swing about the first hinge (140) and the second hinge (150), wherein swinging first arm and second arm cause the cylinder rod (174) to swing in line with the first arm and the second arm, wherein the swinging cylinder rod (174) causes the piston cylinder (171) to pivot, which causes the piston assembly to slide up and down about the piston cylinder (171), thereby rotating the first crankpin (182), wherein rotation of the first crankpin (182) rotates the flywheel (180).