Propulsion device

A propulsion device comprising:

• a cylinder body, having an airflow channel, an air inlet opening and an air discharge opening, wherein the air inlet opening and the air discharge opening are respectively disposed at two ends of the cylinder body, and the airflow channel is disposed between the air inlet opening and the air discharge opening;
• a first set of blades, disposed in the airflow channel and configured to generate airflow entering the airflow channel from the air inlet opening and subsequently pushed toward the air discharge opening to generate the propulsive power;
• a second set of blades, disposed in the airflow channel and adjacent to the air discharge opening relative to the first set of blades and configured to generate airflow to direct the airflow from the first set of blades toward the air discharge opening, thereby further discharging the airflow from the air discharge opening to generate the propulsive power;
• a first transmission shaft, connected to a shaft center of the first set of blades and having a first rotation speed;
• a second transmission shaft, connected to a shaft center of the second set of blades;
• a power gear box, configured to transmit a power from an engine to the first transmission shaft and the second transmission shaft;
• and
• an accelerator, engaged with the first transmission shaft and the second transmission shaft between the first set of blades and the second set of blades, wherein the accelerator is configured to cause the second transmission shaft to have a second rotation speed by being driven by the first transmission shaft, and the second rotation speed is greater than the first rotation speed;
• and
• a fuel tank, wherein the airflow channel tapers from the air inlet opening to the air discharge opening, and the fuel tank is disposed in a ring-shape to wrap the airflow channel thereby corresponding to a tapered volume of the airflow channel.