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F100-PW-229 This is a low-bypass-ratio, mixed-flow, afterburning turbofan used to power Air Force F-15E and F-16C/D aircraft. This growth derivative of the F100-PW-220 was qualified in 1989. Under takeoff conditions this engine can produce 28,500 pounds of thrust wet and 17,000 pounds dry (The Engine Handbook, 1998, p. 25). F100-PW-232 This is a growth version of the F100-PW-229. The F100-PW-232 is not currently in the Air Force inventory but could be used in U.S. Air Force or foreign F-15E and F-16C/D aircraft. Existing F100-PW-229 engines can be modified to this configuration by using kits that are available from Pratt & Whitney. The primary enhancement over the F100-PW-229 is a redesigned fan. This fan provides up to 10 percent higher airflow through improved aerodynamics, and does so at a higher efficiency (Kandebo, 1996a and 1998b). This new fan can increase the thrust of the engine or can extend the engine’s hot section design inspection interval from 4,300 total accumulated cycles (TACs) to 6,000 TACs by lowering the maximum turbine inlet temperature by approximately 120oF while maintaining the F100-PW-229’s maximum thrust level. In addition, the second and third stages of the new fan are integrally bladed, meaning that each stage’s rotating blades and rotor (disk) are a single piece. These one-piece bladed disks (blisks) reduce the engine’s part count, reduce weight and aerodynamic losses, and eliminate each rotor blade’s traditional dovetail attachment roots, thereby precluding the common problem of cracks forming in the blade’s root. The fan’s first-stage blades are attached to their disk in a con- ventional manner “to allow easy field replacement” of blades due to FOD or bird strike (Colaguori, 1998). In addition, the fan’s rotor blades have lower aspect ratios (the blades’ radial length divided by axial length) than the corresponding F110-PW-229 fan blades, mak- ing them sturdier and, therefore, less susceptible to damage from bird strike or FOD. Modern Tactical Jet Engines 139PDF Image | Military Jet Engine Acquisition Technology Basics and Cost-Estimating Methodology
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