1. Small Turbojet Engines: Typically used in small private jets or unmanned aerial vehicles (UAVs), these engines can weigh anywhere from a few hundred pounds up to around 1,000 pounds (450 to 450 kilograms).
2. Medium Turbojet Engines: Commonly found in regional jets, business jets, and military fighter aircraft, these engines can range from around 1,000 pounds to 2,500 pounds (450 to 1,135 kilograms).
3. Large Turbojet Engines: Used in wide-body commercial airliners and large military transport aircraft, these engines can be extremely heavy. They can range from approximately 2,500 pounds to over 10,000 pounds (1,135 to 4,536 kilograms).
4. Turbofan Engines: Turbofans are widely used in commercial airliners and military aircraft. They generally weigh more than turbojet engines because of the additional fan assembly. Depending on the size, turbofans can range from a few thousand pounds to over 20,000 pounds (4,536 to 9,072 kilograms).
5. High-Bypass Turbofan Engines: These engines are highly efficient and commonly used in modern commercial airliners. They can be substantially heavier than other jet engine types due to the increased size of the fan section. High-bypass turbofans can weigh from around 10,000 pounds up to over 40,000 pounds (4,536 to 18,144 kilograms).
It's important to note that these are just approximate weight ranges, and the actual weight of a particular jet engine may vary depending on specific models and manufacturers.