Provided is a disc-type jet turbine engine with controllable and rotational
discharge ports at two sides of a discharge chamber, a fuel tank, and an
operation lever connected with the discharge ports. The rotor shaft of the
jet turbine engine is connected with a start-up electrical motor through a
clutch and with a fuel pump through a gearbox. The fuel nozzle of the
engine is connected with the fuel tank via the accelerator control valve
and the fuel pump. The operation lever controls the clutch. The handle of
the operation lever is provided with an electrical switch, a direction
controller and an accelerator controller. The switch is electrically
connected with the start-up electrical motor, the accelerator controller
is connected to control the accelerator control valve, and the direction
controller is connected with the discharge ports. Around the combustion
chamber is an air-flow guide chamber having an air cooling and
heat-insulate layer.