By Wing Commander 
The Sikorsky CH-53K King Stallion is a cutting-edge heavy-lift helicopter designed to meet the demanding operational needs of the United States Marine Corps (USMC). As the latest iteration in the long-running CH-53 series, the CH-53K offers significant improvements in payload capacity, flight performance, and survivability compared to its predecessor, the CH-53E Super Stallion. This article will explore the development, design features, performance capabilities, and operational significance of this advanced aircraft.
Development of the CH-53K King Stallion
The CH-53K King Stallion’s development began in 2008 as part of a USMC initiative to replace the aging fleet of CH-53E Super Stallions. The new helicopter was designed to address several critical shortcomings of its predecessor, including limited payload capacity and operational range. The USMC envisioned a helicopter capable of supporting modern expeditionary warfare, especially in the Pacific theater, where long-range operations and heavy-lift capabilities are essential.
Sikorsky Aircraft, a subsidiary of Lockheed Martin, was awarded the contract to develop the CH-53K. The program faced several delays and cost overruns during its early stages. Initial estimates placed the cost per helicopter at around $77 million in 2016 dollars[1], but by 2020, that figure had risen to approximately $78 million per unit[2]. Despite these challenges, the first flight of the CH-53K took place on October 27, 2015[3], marking a significant milestone in the program’s development.
The USMC declared initial operational capability (IOC) for the CH-53K in April 2022[1], signaling that the aircraft was ready for limited deployment. The Marine Corps plans to acquire a total of 200 CH-53Ks over the lifetime of the program[1], with full-rate production expected to ramp up by 2024. Sikorsky has been working toward achieving an annual production rate of 24 helicopters by that time[1].
Key Development Milestones:
- 2008: Development begins.
- 2015: First flight.
- 2018: First delivery to USMC.
- 2022: Initial operational capability declared.
- 2024: Full-rate production expected.
Design Features and Innovations
The CH-53K King Stallion represents a significant technological leap over its predecessor, incorporating numerous design innovations aimed at improving performance, survivability, and maintainability. One of the most notable features is its increased payload capacity. The CH-53K can lift up to 36,000 pounds (16,329 kg) externally[3], nearly double that of the CH-53E’s maximum external load of 27,000 pounds (12,247 kg)[2]. This enhanced lifting power allows it to transport heavy equipment such as Humvees and Light Armored Vehicles (LAVs), as well as large quantities of supplies or personnel.
Advanced Engines and Rotor System
At the heart of the CH-53K’s performance improvements are its three General Electric GE38-1B turboshaft engines. Each engine generates 7,500 horsepower (5,600 kW), providing a total of 22,500 horsepower[2]. This represents a 57% increase in power compared to the CH-53E’s engines[1]. These powerful engines enable the helicopter to operate effectively in “hot and high” conditions—environments with high temperatures and altitudes where air density is lower—making it ideal for operations in mountainous or desert regions.
The rotor system has also been significantly upgraded. The CH-53K features composite rotor blades that are both lighter and more durable than those used on previous models. These blades are designed to withstand extreme conditions while providing better lift and maneuverability. The rotor diameter is 24 meters (78.74 feet), giving the helicopter a large lifting area[2].
Fly-by-Wire Controls and Avionics
The cockpit of the CH-53K is equipped with state-of-the-art avionics systems designed to enhance situational awareness and reduce pilot workload. A fully digital “glass cockpit” with fly-by-wire controls allows for more precise handling and automated flight modes. This system includes haptic feedback mechanisms that provide tactile alerts to pilots during critical maneuvers or when approaching operational limits[3].
In addition to advanced flight controls, the CH-53K is equipped with an integrated avionics management system (AMS) that supports mission planning and navigation. This system includes multifunction displays that provide real-time data on aircraft performance, terrain mapping, and threat detection[3]. The avionics suite also includes advanced electronic countermeasures for defense against surface-to-air missiles and other threats.
Survivability Enhancements
Survivability has been a key focus in the design of the CH-53K. The helicopter features lightweight armor plating around critical areas such as the cockpit and fuel tanks. It also incorporates crashworthy seating for both crew members and passengers[3]. The landing gear is retractable and designed to absorb impact forces during hard landings or emergency situations.
Another important survivability feature is the helicopter’s ability to continue flying even after sustaining damage. The fly-by-wire control system can compensate for damage to one or more rotors or engines, allowing pilots to maintain control in emergency situations. Additionally, redundancy is built into many of the aircraft’s systems to ensure continued operation even if one component fails.
Cargo Handling Capabilities
The cargo handling capabilities of the CH-53K have been significantly improved over previous models. The helicopter can carry two standard 463L master pallets internally without modification[2], making it easier to transport supplies between airlifters and forward operating bases without having to reconfigure cargo loads. The internal cabin dimensions are also larger than those of its predecessor: 9.14 meters (30 feet) long by 2.74 meters (9 feet) wide by 1.98 meters (6.5 feet) tall[2].
Externally, the helicopter is equipped with an advanced cargo hook system capable of lifting up to three separate loads simultaneously using different hooks[3]. This allows for greater flexibility when transporting multiple items or when precision placement is required during operations such as construction or disaster relief efforts.
Citations:
[1] https://www.flightglobal.com/helicopters/sikorsky-moves-toward-annual-ch-53k-production-rate-of-24-aircraft/151860.article
[2] https://en.wikipedia.org/wiki/Sikorsky_CH-53K_King_Stallion
[3] https://www.naval-technology.com/projects/ch-53k-super-stallion-heavy-lift-helicopter/
[4] https://www.naval-technology.com/news/us-dod-awards-contract-for-lot-9-ch-53k-king-stallions/
[5] https://www.lockheedmartin.com/en-us/products/sikorsky-ch-53k-helicopter.html
[6] https://www.americanmachinist.com/news/article/55139150/dod-issues-96m-for-heavy-transport-copters-sikorsky-aircraft
[7] https://www.eurasiantimes.com/us-marine-corps-ch-53k-king-stallion-packs/
Performance and Capabilities of the CH-53K King Stallion
The Sikorsky CH-53K King Stallion is not only a marvel of modern aviation engineering but also a critical asset for the U.S. Marine Corps (USMC) in terms of heavy-lift capabilities. Its performance metrics far exceed those of its predecessor, the CH-53E Super Stallion, making it the most powerful helicopter in the U.S. military’s inventory. This section will delve into the specific performance characteristics that make the CH-53K a game-changer in military aviation.
Engine Power and Flight Performance
The CH-53K is powered by three General Electric GE38-1B turboshaft engines, each capable of producing 7,500 shaft horsepower (shp), for a combined total of 22,500 shp. This is a significant upgrade from the CH-53E’s engines, which produced around 4,380 shp each. The increase in engine power allows the CH-53K to operate effectively in challenging environments such as high-altitude and high-temperature conditions, where air density is lower and aircraft performance typically suffers.
The helicopter’s maximum cruise speed is 170 knots (315 km/h), which is impressive for an aircraft of its size and weight class. It has a service ceiling of 16,000 feet (4,877 meters), allowing it to operate in mountainous terrain or regions with elevated altitudes. The rate of climb is equally impressive at 2,500 feet per minute (12.7 meters per second), enabling rapid ascents during critical missions such as search and rescue or combat insertions.
Payload Capacity
One of the most notable improvements in the CH-53K is its payload capacity. The helicopter can carry up to 36,000 pounds (16,329 kg) externally using its advanced cargo hook system, which is nearly double the payload capacity of the CH-53E Super Stallion. This external load capability allows it to transport heavy equipment such as armored vehicles, artillery pieces, or large quantities of supplies over long distances.
Internally, the CH-53K can accommodate two standard 463L master pallets without modification, making it easier to transport cargo between airlifters and forward operating bases. The internal cabin dimensions—9.14 meters (30 feet) long by 2.74 meters (9 feet) wide by 1.98 meters (6.5 feet) tall—are larger than those of its predecessor, allowing it to carry a Humvee or similar vehicles internally.
This increased payload capacity makes the CH-53K ideal for expeditionary operations where heavy equipment needs to be transported rapidly across vast distances. For example, during amphibious assaults or humanitarian missions, the helicopter can deliver critical supplies or personnel directly to remote locations without requiring additional logistical support.
Range and Fuel Efficiency
The CH-53K has a maximum range of 454 nautical miles (841 kilometers) on internal fuel tanks, which can be extended further with auxiliary fuel tanks if needed. This range allows it to operate deep into enemy territory or reach distant locations without requiring frequent refueling stops. The helicopter’s fuel economy is approximately 0.42 nautical miles per gallon (0.205 kilometers per liter), which is relatively efficient given its size and weight.
For longer-range missions or extended operations, the helicopter can be refueled mid-air using a probe-and-drogue system compatible with aerial refueling aircraft such as the KC-130 Hercules. This capability extends its operational range significantly and allows it to remain airborne for prolonged periods during critical missions such as search and rescue or special operations.
Rotor System and Maneuverability
The rotor system on the CH-53K has been completely redesigned to improve both lift and durability. The helicopter features composite rotor blades that are lighter and more resistant to damage than traditional metal blades. These blades are designed to withstand extreme conditions such as high winds or debris fields while providing better lift performance at higher altitudes.
The rotor diameter is 24 meters (78.74 feet), giving the helicopter a large lifting area that contributes to its impressive payload capacity. Despite its size, the CH-53K is surprisingly agile thanks to its fly-by-wire control system, which allows for more precise handling during complex maneuvers such as hovering over uneven terrain or landing on small platforms like ships.
In addition to its agility, the helicopter’s advanced flight control system includes automated flight modes that reduce pilot workload during long missions or when operating in adverse conditions such as poor visibility or high winds.
Survivability Features
Survivability has been a key focus in the design of the CH-53K King Stallion. The helicopter incorporates several features aimed at protecting both crew members and passengers during combat operations or emergency situations.
One of these features is lightweight armor plating around critical areas such as the cockpit and fuel tanks. This armor provides protection against small arms fire or shrapnel from ground-based threats like improvised explosive devices (IEDs). Additionally, crashworthy seating has been installed for both crew members and passengers to minimize injuries during hard landings or crashes.
The helicopter also includes redundant systems for key components such as engines and rotors so that it can continue flying even after sustaining damage from enemy fire or mechanical failure. For example, if one engine fails during flight, the remaining two engines can still provide enough power for safe operation until repairs can be made.
Another important survivability feature is its electronic countermeasures suite designed to protect against surface-to-air missiles (SAMs) or other guided threats commonly encountered in modern combat zones.
Citations:
[1] https://www.flightglobal.com/helicopters/sikorsky-moves-toward-annual-ch-53k-production-rate-of-24-aircraft/151860.article
[2] https://aviationweek.com/defense/aircraft-propulsion/sikorsky-wins-27-billion-ch-53k-order
[3] https://en.wikipedia.org/wiki/Sikorsky_CH-53K_King_Stallion
[4] https://breakingdefense.com/2023/08/sikorsky-awarded-2-7b-contract-for-35-ch-53k-king-stallions-some-bound-for-israel/
[5] https://nationalinterest.org/blog/buzz/ch-53k-king-stallion-heavy-lift-helicopter-making-marine-corps-history-204864
Operational Significance and Role in Modern Warfare
The CH-53K King Stallion is not only a technological marvel but also a crucial asset in modern military operations, particularly for the U.S. Marine Corps (USMC). Its design and capabilities are tailored to meet the evolving demands of 21st-century warfare, where rapid mobility, heavy-lift capacity, and operational flexibility are key requirements. The helicopter’s ability to transport large quantities of troops, equipment, and supplies over long distances makes it an indispensable tool in both combat and humanitarian missions.
Strategic Importance in Amphibious Operations
One of the primary roles of the CH-53K is to support amphibious operations, which are among the most complex and challenging types of military engagements. Amphibious assaults require the rapid deployment of troops and equipment from ships to shore, often under hostile conditions. The CH-53K’s ability to lift up to 36,000 pounds (16,329 kg) externally or carry up to 30 fully-equipped Marines internally allows it to move critical assets quickly and efficiently during such operations.
The helicopter’s design also includes features that make it well-suited for shipboard operations. For example, its smaller shipboard footprint compared to the CH-53E Super Stallion allows it to operate more easily from the decks of amphibious assault ships or aircraft carriers. This capability is essential for the USMC’s expeditionary warfare doctrine, which emphasizes the need for rapid deployment and mobility in littoral environments.
The CH-53K’s role in amphibious operations is further enhanced by its ability to operate in “hot and high” conditions—environments where high temperatures and altitudes reduce aircraft performance. This capability is critical for missions in regions such as the Middle East or mountainous areas where traditional helicopters may struggle to perform effectively.
Support for Expeditionary Warfare
The CH-53K King Stallion plays a vital role in the USMC’s Force Design 2030 initiative, which envisions distributed groups of Marines operating across vast distances in a modern iteration of the World War II island-hopping campaign. This strategy requires a heavy-lift platform capable of transporting personnel, vehicles, and supplies between islands or other remote locations without relying on fixed infrastructure such as airfields.
The helicopter’s long-range capabilities—up to 454 nautical miles (841 kilometers) on internal fuel tanks—allow it to support these distributed operations by providing logistical support over extended distances. Additionally, its ability to carry heavy armored vehicles such as Light Armored Vehicles (LAVs) or Humvees makes it an essential asset for ground forces operating in austere environments.
In this context, the CH-53K serves as a critical logistics connector between sea-based platforms (such as amphibious assault ships) and land-based forces. Its ability to transport large quantities of supplies or equipment directly from ship to shore enables Marine units to sustain themselves during prolonged operations without relying on traditional supply lines.
Humanitarian Missions and Disaster Relief
In addition to its combat roles, the CH-53K King Stallion is also well-suited for humanitarian missions and disaster relief efforts. Its heavy-lift capabilities allow it to transport large quantities of food, water, medical supplies, or construction materials to areas affected by natural disasters such as earthquakes or hurricanes.
For example, during disaster relief operations following hurricanes or tsunamis, roads and other infrastructure are often damaged or destroyed, making it difficult for ground vehicles to reach affected areas. The CH-53K’s ability to lift heavy loads externally allows it to deliver essential supplies directly into disaster zones without needing access to roads or airstrips.
Moreover, the helicopter’s advanced avionics systems—including its fly-by-wire controls—enable it to operate safely in degraded visual environments such as fog or smoke. This capability is particularly valuable during search-and-rescue missions where visibility may be limited due to weather conditions or ongoing fires.
Special Operations Support
The CH-53K is also expected to play a significant role in supporting special operations forces (SOF). Its combination of long-range capabilities, heavy-lift capacity, and advanced avionics makes it an ideal platform for inserting SOF teams into remote or hostile environments where traditional aircraft may not be able to operate effectively.
For example, during special operations missions behind enemy lines, speed and stealth are often critical factors for success. The CH-53K’s ability to fly at higher altitudes and faster speeds than previous models allows it to insert or extract SOF teams quickly while minimizing exposure to enemy air defenses.
Additionally, its advanced electronic countermeasures suite provides protection against surface-to-air missiles (SAMs) or other guided threats commonly encountered during high-risk missions. This survivability feature ensures that SOF teams can be inserted into contested areas with minimal risk of detection or engagement by enemy forces.
Comparisons with Other Heavy-Lift Helicopters
When comparing the CH-53K King Stallion with other heavy-lift helicopters currently in service globally, it becomes clear that the King Stallion stands out as one of the most capable platforms available today.
For instance, the Boeing CH-47 Chinook—the primary heavy-lift helicopter used by the U.S. Army—has a maximum payload capacity of approximately 24,000 pounds (10,886 kg), which is significantly lower than the CH-53K’s 36,000-pound (16,329 kg) external load capacity[1]. While both helicopters are capable of performing similar roles such as troop transport or cargo delivery during combat operations or humanitarian missions, the CH-53K offers greater lifting power and range than its Army counterpart.
Another comparison can be made with Russia’s Mil Mi-26—the largest helicopter ever built—which has a maximum payload capacity of around 44 tons (40 metric tons). While this exceeds even that of the CH-53K King Stallion by a wide margin[9], it’s important to note that the Mi-26 lacks many of the advanced avionics systems found on Western helicopters like fly-by-wire controls or integrated electronic countermeasures suites designed specifically for survivability in modern combat environments[9]. Moreover, its larger size makes it less suitable for shipboard operations compared with smaller platforms like those used by Western navies.
Citations:
[1] https://www.flightglobal.com/helicopters/sikorsky-moves-toward-annual-ch-53k-production-rate-of-24-aircraft/151860.article
[2] https://nationalinterest.org/blog/buzz/ch-53k-king-stallion-heavy-lift-helicopter-making-marine-corps-history-204864
[3] https://www.govconwire.com/2024/07/lockheed-subsidiary-awarded-120m-navy-contract-modification-for-lot-9-ch-53k-long-lead-items/
[4] https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2166581/ch-53k-king-stallion/
[5] https://aviationweek.com/defense/aircraft-propulsion/sikorsky-wins-27-billion-ch-53k-order
[6] https://www.naval-technology.com/projects/ch-53k-king-stallion-heavy-lift-helicopter/
[7] https://www.marinecorpstimes.com/news/your-marine-corps/2024/04/09/marine-corps-delays-1st-deployment-of-new-heavy-lift-helicopter-to-2026/
[8] https://www.naval-technology.com/projects/ch-53k-super-stallion-heavy-lift-helicopter/
[9] https://en.wikipedia.org/wiki/Sikorsky_CH-53K_King_Stallion
Future Prospects and Global Impact of the CH-53K King Stallion
As the CH-53K King Stallion continues to enter service, its future prospects are bright, not only for the U.S. Marine Corps (USMC) but also for potential international customers. The helicopter’s advanced capabilities, including its heavy-lift capacity, modern avionics, and adaptability to various mission types, make it a highly attractive option for military forces worldwide. This section will explore the future of the CH-53K in terms of its operational deployment, potential export markets, and its broader impact on military aviation.
Operational Deployment and Future Upgrades
The CH-53K King Stallion is expected to play a pivotal role in the USMC’s operations for decades to come. With an initial procurement objective of 200 helicopters, the USMC plans to fully replace its aging fleet of CH-53E Super Stallions by the mid-2030s. The helicopter is designed to remain in service until at least 2060, ensuring that it will be a cornerstone of U.S. military aviation for many years.
One of the key factors that will ensure the longevity of the CH-53K is its modular design and upgrade potential. The helicopter is equipped with an Integrated Vehicle Health Management System (IVHMS), which monitors the condition of critical components in real-time and predicts when maintenance is required. This system not only improves safety but also reduces operating costs by minimizing unscheduled maintenance.
In addition to IVHMS, the CH-53K is provisioned for future upgrades in autonomy and mission systems. As unmanned systems continue to evolve, there is potential for the CH-53K to incorporate autonomous flight capabilities or advanced mission planning software that could further reduce pilot workload and enhance operational efficiency.
Potential Export Markets
While the primary customer for the CH-53K King Stallion is the USMC, there is significant interest from international markets as well. Several countries have expressed interest in acquiring heavy-lift helicopters to enhance their military capabilities, and the CH-53K is positioned as one of the top contenders in this market.
Germany and Israel are two countries that have been considering the CH-53K as a replacement for their aging fleets of heavy-lift helicopters. Germany, in particular, has been evaluating both the CH-53K and Boeing’s CH-47F Chinook as part of its “Schwerer Transporthubschrauber” (STH) program aimed at replacing its legacy CH-53Gs. While Boeing has argued that the Chinook offers a lower cost alternative, proponents of the CH-53K point out that it offers superior lifting capacity and range—capabilities that could be crucial for Germany’s evolving defense needs[4].
Israel has also shown interest in acquiring new heavy-lift helicopters to replace its aging fleet of Yas’ur (CH-53D) helicopters. The Israeli Air Force has historically relied on Sikorsky helicopters for its heavy-lift needs, making the CH-53K a natural choice for consideration. The helicopter’s ability to operate in “hot and high” environments—such as those found in Israel’s desert regions—makes it particularly well-suited for Israeli defense operations[4].
Other potential markets include Japan and South Korea, both of which have expressed interest in modernizing their rotary-wing fleets. As tensions continue to rise in the Asia-Pacific region, these countries may seek to acquire advanced heavy-lift helicopters like the CH-53K to enhance their military logistics and rapid deployment capabilities.
Global Impact on Military Aviation
The introduction of the CH-53K King Stallion represents a significant advancement in military aviation technology, particularly in terms of heavy-lift capabilities. Its ability to transport large quantities of troops, equipment, or supplies over long distances with fewer sorties than previous models makes it a force multiplier on modern battlefields.
One of the key advantages of the CH-53K is its interoperability with NATO forces. The helicopter meets NATO Full Height Transport Helicopter (FHTH) requirements, meaning it can seamlessly integrate with other NATO assets during joint operations[1]. This interoperability is crucial for multinational missions such as those conducted by NATO or United Nations peacekeeping forces.
The helicopter’s ability to operate from both land bases and naval platforms also enhances its versatility in expeditionary warfare scenarios. As more countries invest in amphibious capabilities—whether for humanitarian missions or combat operations—the demand for heavy-lift helicopters like the CH-53K is likely to grow.
Challenges and Competition
Despite its many advantages, the CH-53K King Stallion faces several challenges as it enters full-rate production and seeks international customers. One of the primary challenges is cost. At approximately $78 million per unit[1], the CH-53K is one of the most expensive helicopters on the market today. This high price tag has led some potential customers—such as Germany—to consider less expensive alternatives like Boeing’s CH-47F Chinook[4].
Another challenge is competition from other heavy-lift platforms. While there are few helicopters that can match the lifting capacity of the CH-53K, other aircraft such as Russia’s Mil Mi-26 offer similar capabilities at a lower cost. Additionally, tiltrotor aircraft like Bell Boeing’s V-22 Osprey provide an alternative solution for rapid troop transport or cargo delivery over long distances.
However, proponents of the CH-53K argue that its advanced avionics systems, fly-by-wire controls, and superior lifting power justify its higher cost compared to legacy platforms like the Chinook or Mi-26[4]. Moreover, as more countries seek to modernize their military forces with next-generation technology, there may be increased demand for platforms like the CH-53K that offer greater flexibility and performance than older models.
Conclusion
The Sikorsky CH-53K King Stallion represents a significant leap forward in heavy-lift helicopter technology. With its advanced engines, composite rotor blades, fly-by-wire controls, and enhanced survivability features, it offers unparalleled performance in challenging environments such as high altitudes or extreme temperatures.
For the U.S. Marine Corps, the CH-53K will serve as a critical logistics connector capable of transporting troops and equipment across vast distances during amphibious assaults or expeditionary operations. Its ability to carry heavier loads than any other helicopter currently in service makes it an indispensable asset for modern warfare.
Internationally, there is growing interest in acquiring heavy-lift helicopters like the CH-53K as countries seek to enhance their military capabilities in response to evolving security threats. While cost remains a challenge for some potential customers, those who prioritize performance and versatility may find that investing in next-generation platforms like the King Stallion offers significant long-term benefits.
As production ramps up over the coming years—and with potential upgrades on the horizon—the future looks bright for this impressive aircraft. Whether supporting combat operations or providing humanitarian aid during natural disasters, there is no doubt that the Sikorsky CH-53K King Stallion will play a vital role in shaping global military aviation well into the 21st century.
Frequently Asked Questions:
- What makes the Sikorsky CH-53K different from other helicopters?
- The Sikorsky CH-53K offers superior lifting capacity (36,000 lbs), advanced avionics systems such as fly-by-wire controls, and enhanced survivability features compared to older models like its predecessor—the CH-53E Super Stallion.
- How much does a Sikorsky CH-53K cost?
- As of 2020 estimates, each unit costs approximately $78 million[1][2].
- Which countries are interested in purchasing the Sikorsky CH-53K?
- Germany and Israel are among potential buyers considering replacing their existing fleets with this advanced heavy-lift helicopter[4].
- What missions can be performed by a Sikorsky CH-53K?
- The helicopter supports various missions including troop transport (up to 30 fully-equipped Marines), cargo transport (up to 36 tons externally), medical evacuation (24 patients), special operations support, disaster relief efforts among others[1][2][5].
Citations:
[1] https://www.lockheedmartin.com/content/dam/lockheed-martin/israel/documents/CH53K_Brochure_2022.pdf
[2] https://www.naval-technology.com/projects/ch-53k-king-stallion-heavy-lift-helicopter/
[3] https://www.lockheedmartin.com/en-us/products/sikorsky-ch-53k-helicopter.html
[4] https://defense.info/defense-systems/comparing-chinook-to-the-ch-53k-the-german-case/
[5] https://www.militaryfactory.com/aircraft/detail.php?aircraft_id=863
[6] https://nationalinterest.org/blog/buzz/ch-53k-king-stallion-heavy-lift-helicopter-making-marine-corps-history-204864
[7] https://en.wikipedia.org/wiki/Sikorsky_CH-53K_King_Stallion
[8] https://www.navy.mil/Resources/Fact-Files/Display-FactFiles/Article/2166581/ch-53k-king-stallion/