# The C-17 Globemaster III is a highly capable cargo aircraft used by military operators.

*aerospace · news · 2026-05-01 · Simple Flying*

## Key points

- The C-17 Globemaster III uses Pratt & Whitney F117-PW-100 engines, not literal Boeing 757 engines.
- The F117 engine is a military adaptation derived from the commercial Pratt & Whitney PW2000 used in some Boeing 757s.
- Despite similar core architectures, C-17 F117 engines have military-specific features, controls, and integration.
- The F117 and PW2000 engines are not directly interchangeable due to different operational and hardware requirements.

**Companies:** Boeing, Pratt & Whitney
**Countries:** United States

[Read the full story on Simple Flying](https://simpleflying.com/true-c17-globemaster-powered-by-boeing-757-engines/)

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