RTX Pratt Whitney Partners with PBS Group to Advance Auxiliary Power Units

Strategic Alliance in Aerospace: RTX’s Pratt & Whitney Partners with PBS Group to Revolutionize Auxiliary Power Unit Technology

The aerospace industry witnessed a significant strategic development on September 18, 2025, when RTX’s Pratt & Whitney division announced a comprehensive partnership with Czech aerospace manufacturer PBS Group to develop next-generation auxiliary power unit (APU) technology. This collaboration represents a convergence of American aerospace leadership and European engineering excellence, targeting enhanced performance, reliability, and innovation in critical aircraft systems that support both commercial aviation and military operations.

The partnership leverages Pratt & Whitney’s extensive experience in gas turbine technology and global manufacturing capabilities alongside PBS Group’s specialized expertise in compact, high-efficiency auxiliary power systems developed over more than five decades. The initiative, supported by the Czech Ministry of Defense’s Industrial Cooperation Section, aims to create APUs with the highest power density on the market while significantly reducing form factor and weight compared to traditional systems. This development occurs within a rapidly expanding APU market, valued at approximately $3.08 billion in 2025 and projected to reach $3.69 billion by 2030, driven by increasing aircraft deliveries, retrofitting requirements, and emerging applications in unmanned systems and advanced military platforms.

Partnership Genesis and Strategic Framework

The collaboration between RTX’s Pratt & Whitney and PBS Group represents a carefully orchestrated strategic alliance that builds upon earlier exploratory agreements between the two companies. The foundation for this partnership was established through a Memorandum of Understanding signed in August 2023, when both entities committed to jointly exploring opportunities for next-generation APU development. This preliminary agreement allowed both companies to assess complementary strengths and identify synergies in their respective technological capabilities and market positions.

The formal partnership announcement on September 18, 2025, marked the transition from exploratory discussions to active development commitments. The cooperation was facilitated and supported by the Industrial Cooperation Section of the Czech Ministry of Defense, which has been instrumental in connecting domestic and international partners to strengthen the innovative potential of the Czech defense industry. This government support reflects the strategic importance of aerospace technologies to Czech national interests and the country’s position within NATO alliance structures.

Radka Konderlová, Director General for Industrial Cooperation at the Czech Ministry of Defense & Armed Forces, emphasized the significance of this collaboration, stating that “PBS Group is a unique company both in the Czech Republic and globally. Its cooperation with RTX, one of the largest companies in the defense industry, is not only proof of PBS’s capabilities, but also a testament to the strength of Czech industry as a whole.” This governmental endorsement underscores the partnership’s strategic value beyond commercial considerations, encompassing defense industrial base strengthening and international cooperation objectives.

“PBS Group is a unique company both in the Czech Republic and globally. Its cooperation with RTX, one of the largest companies in the defense industry, is not only proof of PBS’s capabilities, but also a testament to the strength of Czech industry as a whole.” – Radka Konderlová, Czech Ministry of Defense

Company Backgrounds and Technological Heritage

RTX Corporation, formerly known as Raytheon Technologies, stands as the world’s largest aerospace and defense company with more than 185,000 global employees and 2024 sales exceeding $80 billion. The company operates through three primary business segments: Collins Aerospace, Pratt & Whitney, and Raytheon, each serving distinct but complementary roles in the broader aerospace ecosystem. RTX’s extensive portfolio encompasses commercial aviation systems, military propulsion technologies, and integrated defense solutions that support customers worldwide.

Pratt & Whitney, operating as an RTX business division, has established itself as a world leader in aircraft engine design, manufacture, and service since 1925. The company’s technological heritage spans nearly a century of aviation innovation, during which its engineers have pioneered revolutionary aircraft propulsion technologies. Today, Pratt & Whitney supports more than 90,000 in-service engines through a global network of maintenance, repair, and overhaul facilities, demonstrating its comprehensive lifecycle support capabilities.

PBS Group traces its technological heritage to 1814, evolving from textile machinery production to advanced aerospace systems. Its entry into aviation occurred in the 1970s with the development of an auxiliary energy unit for the Aero L-39 Albatros aircraft. The company now operates production facilities in Velká Bíteš, Czech Republic, and has expanded capabilities in the United States and India. PBS Group’s expertise encompasses jet engines, turboprop and turboshaft engines, auxiliary power units, and related aerospace systems, serving customers in over 15 countries.

Auxiliary Power Unit Technology and Applications

Auxiliary Power Units represent critical aircraft systems that provide essential functions supporting both commercial and military aviation operations. APUs are compact, self-contained gas turbine engines designed to generate electrical power and compressed air when an aircraft’s main engines are not operating. These systems serve multiple vital functions: starting main engines, providing electrical power for aircraft systems, supplying compressed air for cabin environmental control, powering avionics cooling systems, and delivering emergency power capabilities for in-flight engine restart procedures.

The technical sophistication of modern APUs reflects decades of engineering advancement aimed at maximizing performance while minimizing size, weight, and maintenance requirements. Contemporary APU designs incorporate advanced materials, precision manufacturing techniques, and sophisticated control systems that enable reliable operation across diverse environmental conditions. These systems must function effectively at various altitudes, temperatures, and operational scenarios while meeting stringent safety and reliability standards established by aviation regulatory authorities.

Commercial aircraft applications for APUs encompass a broad range of aircraft types, from regional jets and narrow-body aircraft to wide-body international carriers and business jets. In commercial operations, APUs provide ground power during aircraft turnaround procedures, reducing dependency on ground power equipment and enabling flexible gate operations at airports worldwide. Military aircraft applications for APUs extend beyond basic power generation to encompass specialized requirements for combat aircraft, rotorcraft, and unmanned systems, including support for electronic warfare technologies and improved thermal management systems required by modern military platforms.

Market Dynamics and Competitive Landscape

The global auxiliary power unit market demonstrates robust growth characteristics driven by increasing aircraft production, fleet modernization requirements, and expanding applications in emerging aviation sectors. Market research indicates the APU sector was valued at approximately $3.08 billion in 2025, with projections showing growth to $3.69 billion by 2030, representing a compound annual growth rate of 3.65 percent. Alternative analyses suggest even stronger growth potential, with projections ranging from $2.6 billion in 2025 to $3.8 billion by 2032, indicating a CAGR of 5.7 percent.

The commercial aviation segment dominates APU market demand, accounting for 68.21 percent of revenue share in 2024, primarily driven by narrow-body aircraft deliveries. Regional market dynamics show significant variation, with Asia-Pacific emerging as the fastest-growing region at a projected CAGR of 5.40 percent, reflecting China’s C919 aircraft program and India’s fleet expansion outlook. European and North American markets maintain steady growth patterns supported by fleet modernization programs and replacement cycles for aging APU installations.

The competitive landscape within the APU market demonstrates unique characteristics due to significant barriers to entry and certification requirements. The market operates essentially as a duopoly between Honeywell International and Pratt & Whitney, with Honeywell commanding approximately 70 percent market share while Pratt & Whitney holds the remaining 30 percent. Honeywell’s market leadership is based on its comprehensive APU portfolio, while Pratt & Whitney focuses on specific market segments and platforms, including the A380, Boeing 747, and Boeing 787.

The APU market is “essentially a duopoly between Honeywell International and Pratt & Whitney, with Honeywell commanding approximately 70 percent market share.”

Technical Innovation and Development Objectives

The collaborative development program between Pratt & Whitney and PBS Group targets significant technological advancements that address current APU limitations while anticipating future aircraft requirements. The next-generation APU is projected to achieve the highest power density available in the market, delivering maximum performance within a reduced form factor and weight profile compared to existing systems. This enhanced power density represents a fundamental engineering challenge that requires innovations in turbomachinery design, materials science, and system integration.

Weight reduction objectives for the new APU system reflect industry-wide emphasis on fuel efficiency and operational cost reduction. Every pound of weight savings in aircraft systems translates directly to fuel consumption reductions over aircraft operating lifecycles, creating significant economic benefits for operators. The technical specifications for the next-generation APU emphasize rapid starting capabilities and reliable operation at high altitudes, addressing specific operational scenarios encountered in both commercial and military applications.

Enhanced electrical power generation capabilities represent another key development objective, reflecting the increasing electrification of aircraft systems across both commercial and military platforms. Modern aircraft designs incorporate more electric architectures that rely on electrical power for flight controls, environmental systems, landing gear operation, and advanced avionics systems. Thermal management improvements constitute a critical technical development area, particularly for military applications where APUs may need to support electronic warfare systems and advanced sensor equipment that generate substantial heat loads.

Industry Trends, Strategic Implications, and Regulatory Environment

The auxiliary power unit market operates within broader industry trends that shape demand patterns, technological requirements, and competitive dynamics. Commercial aviation growth, particularly in emerging markets, creates sustained demand for new aircraft equipped with modern APU systems. Fleet modernization programs represent another significant market driver as airlines replace aging aircraft with more fuel-efficient models equipped with advanced APU technology.

Regulatory developments influence APU market dynamics through environmental standards, noise limitations, and operational requirements established by aviation authorities. The emergence of unmanned aircraft systems creates new market segments for APU technology adapted to autonomous operation requirements. Sustainable aviation fuel adoption presents both opportunities and challenges for APU manufacturers, requiring systems capable of operating reliably on alternative fuel compositions.

The regulatory environment governing auxiliary power unit development and certification creates significant barriers to entry while ensuring safety and reliability standards essential for aviation operations. Certification processes require extensive testing, documentation, and validation procedures. PBS Group’s position as one of only four companies worldwide authorized to develop and certify civil APUs demonstrates its technical capabilities and regulatory compliance expertise.

Financial Implications and Investment Analysis

The financial implications of the Pratt & Whitney and PBS Group partnership extend beyond immediate development costs to encompass potential market share expansion, revenue diversification, and strategic positioning benefits for both organizations. RTX’s strong financial performance provides substantial resources for research and development investments. Market growth projections suggest significant revenue potential for successful APU development programs, with the global APU market expected to expand from $3.08 billion in 2025 to $3.69 billion by 2030.

The duopoly nature of the APU market creates both challenges and opportunities for market share expansion. While Honeywell currently dominates with approximately 70 percent market share, technological innovations that provide distinctive performance advantages could enable market share redistribution. Defense market opportunities present particularly attractive financial prospects due to higher margins associated with military contracts and long-term support requirements.

PBS Group’s production expansion plans reflect confidence in market growth prospects and the partnership’s commercial potential. The company reports increasing jet engine production by approximately 300 percent year-over-year, transitioning from tens of engines annually to hundreds with projections toward thousands of units. Investment timing considerations favor the partnership’s development schedule, which aligns with projected technology maturation cycles and market demand patterns.

Conclusion

The strategic partnership between RTX’s Pratt & Whitney and PBS Group represents a significant development in auxiliary power unit technology that addresses current market demands while positioning both companies for future growth opportunities. This collaboration leverages complementary expertise, combines established market presence with innovative engineering capabilities, and targets technological advancement that could reshape competitive dynamics within the APU market.

The broader implications of this partnership extend beyond immediate technical developments to encompass strategic positioning within a growing market, international cooperation benefits, and potential for expanded collaboration across additional aerospace technologies. Market projections indicating growth from $3.08 billion in 2025 to $3.69 billion by 2030 create substantial opportunities for companies capable of delivering innovative solutions that address evolving customer requirements. The convergence of multiple industry trends, including fleet modernization requirements, regulatory developments, and emerging aircraft architectures, creates both challenges and opportunities that the partnership is well-positioned to address.

FAQ

What is an Auxiliary Power Unit (APU)?
An Auxiliary Power Unit (APU) is a small gas turbine engine that provides electrical power and compressed air to aircraft when the main engines are not running, supporting functions such as engine starting, environmental control, and avionics operation.

Who are the main players in the global APU market?
The global APU market is dominated by Honeywell International and Pratt & Whitney, with Honeywell holding approximately 70 percent market share and Pratt & Whitney the remaining 30 percent.

What are the primary goals of the Pratt & Whitney and PBS Group partnership?
The partnership aims to develop next-generation APUs with the highest power density, reduced size and weight, enhanced electrical power generation, and improved reliability for both commercial and military aviation applications.

How does the partnership benefit the Czech aerospace industry?
The collaboration strengthens the Czech aerospace industrial base, supports national defense objectives, and highlights the capabilities of PBS Group as a global technology leader.

What market trends are influencing APU development?
Major trends include increased aircraft electrification, fleet modernization, stricter environmental regulations, the rise of unmanned systems, and the adoption of sustainable aviation fuels.

Sources

• RTX News
• PBS Group History