Why was the F-15EX Purchased Over the F-15 Silent Eagle Variant?

The decision to purchase the F-15EX was driven by a combination of strategic, political, and logistical factors. While both aircraft share similar origins and design philosophies, the USAF opted for the F-15EX due to its ability to leverage existing technology and logistical support, as well as its cost-effectiveness in missions that do not require stealth.

Justifications for the F-15EX Purchase

Firstly, it is crucial to understand that the F-15 version in question does not incorporate any stealth features. The F-15EX is more akin to the F-15's most advanced iteration, utilizing its strength in carrying a massive payload. This configuration is only viable because an aircraft like the F-35 exists to ensure stealth and protection for this type of mission.

Furthermore, the order for the F-15EX was not initiated by the USAF, but rather by the Pentagon, which was orchestrated in the context of a period marked by peculiar financial and political decisions under former President Trump. The feasibility of the F-15 Silent Eagle had not been fully proven, and its costs were deemed too high to warrant the investment. In contrast, the F-15EX was found to be a more viable option, especially given its existing infrastructure and tested components.

Exclusivity and Comparison with F-15 SE

The F-15 Silent Eagle was more of a technical proposal that had not been fully proven. The F-15EX, on the other hand, was proposed and accepted because it was a largely finished product, with all components, including the AMBER racks, funded, tested, and deployed. This made it a cheaper and less risky option to replace the aging F-15s, with minimal delivery delays and minimal crossover training requirements.

Logistical and Cost-Effectiveness

The USAF recognized the need for a cheaper alternative to the F-35, and the F-15EX served this need by offering a more straightforward integration into existing fleet operations. Additionally, the F-15EX is not stealthy, which made it less expensive to maintain and operate, particularly for missions that do not require stealth capabilities. This strategic decision allowed the USAF to redirect costly airframe hours from the F-22 and F-35 to missions where stealth was essential.

The Role of Patrick M. Shanahan

Patrick M. Shanahan, who was the Secretary of Defense at the time of the order, played a significant role in this decision. His background at Boeing, where he spent 30 years in various roles, provided him with a unique perspective. This understanding of the complexities and limitations of stealth technology allowed for a more practical and business-minded approach to aircraft procurement, aligning with the USAF's needs in a cost-effective manner.

Conclusion

In summary, the choice between the F-15EX and the F-15 Silent Eagle was a calculated decision driven by the need for affordability, existing technological readiness, and the minimization of logistical complications. The USAF wisely opted for the F-15EX to continue its mission support in a more cost-effective and strategic manner.