Lockheed C-5 Galaxy vs. Boeing C-17 Globemaster III

The Lockheed C-5 Galaxy is a large military transport aircraft developed by the Lockheed Corporation, now Lockheed Martin. The C-5 distinguishes itself by its sheer size and payload capacity, designed to transport a wide range of military equipment, including oversized vehicles and machinery.

Production History: Development of the Lockheed C-5 Galaxy began in the 1960s to replace the Douglas C-133 Cargomaster and to complement the Lockheed C-141 Starlifters. The United States Army desired a transport aircraft that could carry a wide array of outsized equipment. After a rigorous selection process, Lockheed's design, characterized by a T-tail and a unique cockpit position above the cargo area, was chosen in 1965. The first C-5A Galaxy was rolled out in 1968. The program, however, faced several challenges, including technical problems, weight issues, and cost overruns, leading to congressional investigations. Despite these hurdles, the C-5 Galaxy emerged as a key asset in strategic airlift capabilities​​​​.

Design Features: The C-5 Galaxy stands out with its four General Electric TF39-GE-1C turbofan engines, providing a significant thrust and efficiency. Its design includes a high-set wing with a 25-degree sweep and a distinctive T-tail. The aircraft is equipped with forward and rear cargo loading assemblies and a visor-type upward-hinged nose. The upper deck can accommodate a crew of six, a relief crew, and passengers, with provisions like bunk rooms, galleys, and lavatories. The cargo compartment is vast, capable of carrying a range of military hardware, including tanks, helicopters, and large numbers of troops. The landing gear system is unique, featuring a "kneeling" capability to facilitate cargo loading. The C-5 also has inflight refueling capabilities, extending its operational range significantly​​.

Operational History: Since its introduction, the C-5 Galaxy has been a critical component of U.S. military logistics, capable of transporting heavy and outsized military equipment globally. It played a vital role in operations such as Desert Shield and Desert Storm, where despite being only 12% of the airlift fleet, it carried 44% of the cargo. The Galaxy's capacity for strategic airlift has proven invaluable in numerous military and humanitarian operations, making it a cornerstone of the U.S. Air Force's airlift capability.

Similar Freighter Models: The Lockheed C-5 Galaxy is often mentioned alongside the Russian Antonov An-124. The C-5 was the largest aircraft in the world until the introduction of the An-124 in 1982. Compared to other US military aircraft, the C-5 Galaxy is significantly bigger than the C-17 Globemaster III, C-130 Hercules, and C-141 Starlifter.

The Boeing C-17 Globemaster III, a high-wing, four-engine, T-tailed military transport aircraft, is a key asset in the realm of strategic and tactical airlift missions. Developed by McDonnell Douglas and later produced by Boeing, this versatile aircraft is designed to perform rapid strategic delivery of troops and all types of cargo to main operating bases or directly to forward bases in deployment areas.

Production History: The development of the C-17 began in the 1980s, addressing the United States Air Force's need for a modern air mobility platform. Officially launched with a request for proposals in 1980, the project aimed to replace the aging fleet of C-141 Starlifters and augment the capabilities of the C-5 Galaxy. Despite initial development challenges, the first C-17 made its maiden flight on September 15, 1991. The aircraft overcame early technical and budgetary issues, eventually proving its worth and becoming a mainstay in the USAF and several other air forces worldwide.

Design Features: The C-17's design includes a robust high-wing structure, enabling it to perform in various operational contexts. Its notable features include Pratt & Whitney F117-PW-100 turbofan engines, advanced avionics, and a sophisticated cargo handling system. The aircraft can operate from short and underprepared runways, thanks to its Short Takeoff and Landing (STOL) capabilities. It has a maximum payload capacity of 170,900 pounds and a maximum takeoff weight of 585,000 pounds, highlighting its capability to transport large and heavy cargo, including main battle tanks and large equipment.

Operational History: Renowned for its operational reliability and flexibility, the C-17 boasts impressive mission success rates and low maintenance requirements. It has been extensively used in military, humanitarian, and disaster relief operations worldwide. The aircraft's ability to deliver cargo and personnel to challenging and remote locations has made it invaluable in both combat and peacetime missions. The primary operator of the C-17 Globemaster III is the United States Air Force. Other notable operators include the air forces of the United Kingdom, Australia, Canada, India, Qatar, the United Arab Emirates, and Kuwait.

Similar Freighter Models: While the C-17 is unique in its class, it can be compared to other military transport aircraft like the Lockheed Martin C-5 Galaxy in terms of payload capacity and operational scope. However, the C-17's ability to operate from shorter and less prepared runways sets it apart from its peers, offering a blend of tactical and strategic airlift capabilities.