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What is the total horse power of all 4 engines a Boeing 747?

The total horsepower of all 4 engines on a Boeing 747 depends on the specific model of the engine. Here's why it's not a simple answer:

* Different Engine Types: Boeing 747s have used a variety of engines throughout their history, including the Pratt & Whitney JT9D, General Electric CF6, and Rolls-Royce RB211. Each engine type has its own horsepower output.

* Engine Variants: Even within the same engine type, there are different variants with varying horsepower.

Here are some examples of engine types and their horsepower:

* Pratt & Whitney JT9D: 43,000-48,000 horsepower (per engine)

* General Electric CF6: 52,000-60,000 horsepower (per engine)

* Rolls-Royce RB211: 45,000-50,000 horsepower (per engine)

To get the total horsepower for a specific Boeing 747, you would need to know the exact engine model installed on the aircraft.

For example, a Boeing 747-400 with four General Electric CF6-80C2B5 engines would have a total horsepower of approximately 240,000 (60,000 x 4).

Important Note: Horsepower is often used to measure engine power, but in the aviation industry, thrust (measured in pounds) is a more common measurement.