B-52 vs C-5 Galaxy Size Comparison: Why the Airlifter Dwarfs the Bomber

How we compare the C-5 and the B-52

The C-5 Galaxy and the B-52 Stratofortress are not rivals. One is the largest aircraft the Air Force flies, the other is its oldest bomber, and neither can do the other’s job.

So this comparison answers what readers actually search for: how big each one is, what each carries, which flies farther and faster, and how long both will keep flying. Full specifications sit on our C-5 Galaxy and B-52 Stratofortress pages.

B-52 vs C-5 size comparison: which is bigger?

The C-5 is much bigger. It is 247 feet (75.3 m) long against about 159 feet (48.5 m) for the B-52, a difference of roughly 88 feet (27 m).

Its wing spans 222 feet 9 inches (67.9 m), nearly 38 feet (11.5 m) more than the B-52’s 185 feet (56.4 m). Its tail stands 65 feet 1 inch (19.8 m) high, about 24 feet (7.4 m) taller than the bomber’s.

The weight gap is wider still. Empty, a C-5M weighs 380,000 pounds (172,365 kg), more than twice the B-52’s roughly 185,000 pounds (83,915 kg). At maximum takeoff weight it is 840,000 pounds (381,000 kg) against 488,000 pounds (221,350 kg).

How big is a B-52 next to other big aircraft?

The B-52 is big for a bomber, but not for a jet. It is smaller than a Boeing 747-400 on every measure, and smaller than the C-17 Globemaster III airlifter on every measure but wingspan.

Is a B-52 bigger than a 747? No. The 747-400 is about 72 feet (22 m) longer, its wing spans about 26 feet (8 m) more, and it weighs roughly 387,000 pounds (175,500 kg) more at maximum takeoff weight.

The stretched 747-8, at 250 feet 2 inches (76.3 m), is even longer than the C-5. For how the Galaxy measures up against the jumbo, see our 747 Freighter vs C-5 Galaxy comparison.

The B-52 is not the biggest bomber ever built, either. The Convair B-36 Peacemaker of the early Cold War was about 3 feet longer and spanned 230 feet (70.1 m), wider even than the C-5, though the B-52 is heavier at takeoff.

Against the B-1B Lancer, the B-52 is the bigger airplane: about 13 feet (4 m) longer and 48 feet (14.6 m) wider with the Lancer’s wings fully forward. The C-17 is roughly 15 feet longer than the B-52, with a wing about 15 feet shorter.

Where the C-5 Galaxy wins

Four times the payload

The C-5M’s maximum cargo load is 281,000 pounds (127,500 kg), about four times the B-52’s 70,000-pound (31,750 kg) weapons load. Its floor takes 36 standard pallets.

That is enough for two M1 Abrams main battle tanks, four M2 Bradley fighting vehicles or six AH-64 Apache helicopters, according to Air & Space Forces Magazine.

It was built to be loaded fast. The nose and the tail both open, and full-width drive-on ramps at each end let vehicles roll on in double rows.

Range with a full load is much shorter than the headline figure. With 281,001 pounds aboard, the Air Force says a C-5M can fly 2,150 nautical miles, unload, and fly another 500 nautical miles to a second base without refueling.

The cargo plane that launched an ICBM

The C-5 has even launched an intercontinental ballistic missile. On October 24, 1974, an 86,000-pound (39,000 kg) Minuteman I was pulled by parachute out of a C-5A at 20,000 feet over the Pacific.

The missile fell to 8,000 feet, fired its rocket engine for 10 seconds, and climbed back to 20,000 feet before dropping into the ocean. The test proved an ICBM could be launched from the air.

Engineering and security problems kept the idea from ever being deployed. But that one missile outweighed the B-52’s entire weapons load.

Where the B-52 Stratofortress wins

Range and endurance

The B-52 flies farther without refueling. The Air Force gives it an unrefueled range of 8,800 miles (14,200 km), against 4,800 nautical miles, about 5,520 miles (8,890 km), for a C-5M carrying 120,000 pounds (54,400 kg).

Both can refuel in the air, and the bomber has used that to fly some of the longest combat missions on record. In September 1996, two B-52Hs flew a 34-hour, 16,000-mile (25,750 km) round trip from Louisiana to strike targets in Baghdad, at the time the longest-distance combat mission ever flown.

Faster and higher

The B-52 is also the faster jet. The Air Force lists its top speed as 650 mph (1,046 km/h), or Mach 0.84, while the C-5M’s maximum is 462 knots, about 532 mph (856 km/h).

Its official ceiling is 50,000 feet (15,200 m), above any figure published for the C-5.

The widest range of weapons

The B-52 carries about 70,000 pounds (31,750 kg) of mixed ordnance: bombs, mines and missiles. The Air Force says it can drop or launch the widest array of weapons in the US inventory, from gravity and cluster bombs to JDAM guided bombs and cruise missiles.

For the nuclear mission, the B-52H can carry up to 20 air-launched cruise missiles. In Vietnam, “Big Belly” B-52Ds carried up to 108 500-pound bombs, 84 inside and 24 under the wings.

A bomber with air-to-air kills

The B-52 has even shot down fighters. In December 1972, B-52D tail gunners were credited with downing two North Vietnamese MiG-21s with their quad .50-caliber machine guns.

Vietnam never confirmed either kill, but the credits make the B-52 the largest aircraft ever credited with an air-to-air victory.

How many B-52s were lost in combat?

During the Vietnam War, 31 B-52s were lost. The worst of it came in Operation Linebacker II, the December 1972 “Christmas bombings” of Hanoi and Haiphong.

Over 12 days, B-52s flew 729 sorties in that campaign. Fifteen were shot down, and 25 crewmen were killed in those losses.

The C-5 is an unarmed transport and was never meant to fight. Its job is to deliver the equipment the rest of the force goes to war with.

Why hasn’t the B-52 been replaced?

Because its would-be successors either fell short or ended up flying alongside it. The B-58 Hustler and XB-70 Valkyrie disappointed or were abandoned, and the B-1 replaced only the older B-52 models.

The B-52 also remains an economical bomber against enemies without advanced air defenses, and it can carry outsized weapons under its wings that the stealthy B-21 Raider cannot. The Air Force plans to fly the two together for decades.

What eventually follows it is only now being studied. The Air Force’s fiscal 2027 budget starts a heavy bomber analysis of alternatives to weigh future B-52 requirements against a new heavy bomber.

The B-52J: new engines, new radar, new delays

Instead of replacing the B-52, the Air Force is rebuilding it. The B-52J adds Rolls-Royce F130 engines and an AN/APQ-188 radar, and the Air Force expects to keep the type flying until at least 2050.

It is late and over budget. A GAO report released on July 31, 2026, put the engine program at $15.4 billion, up more than 38 percent since 2018, and the radar at about $2.9 billion, after more than 30 percent growth.

The GAO also said the B-52J will not be operational until 2033, five years behind the original schedule. Its report was written before a crash that set the radar work back further.

On June 15, 2026, the first B-52H fitted with the new radar crashed right after takeoff at Edwards Air Force Base in California, killing all eight people aboard. It was the radar program’s only flying testbed, and a second test jet is being modified to replace it.

No cause had been published as of September 2026. The Air Force said at the time that the investigation could take about six months.

That leaves 75 B-52Hs, all built in 1961 and 1962, which already ranks them among the oldest military planes still in service. They are still busy.

From March 2026, B-52s struck ballistic missile and command posts in Iran, and by the end of that month they were flying over Iranian territory. On September 1, 2026, a 2nd Bomb Wing task force arrived at RAAF Base Tindal in northern Australia.

The C-5 in 2026: flying to 2050

The Air Force has 52 C-5s, all rebuilt to C-5M standard, including two space cargo versions. They fly from Dover in Delaware, Travis in California, Lackland in Texas and Westover in Massachusetts.

Keeping them flying is getting harder. Air Force Chief of Staff Gen. Kenneth Wilsbach told a House committee in April 2026 that the C-5’s mission capable rate had fallen to 37 percent. In fiscal 2024 it was 48.6 percent.

Even so, the fiscal 2027 budget request pushes its retirement out. The Next-Generation Airlifter is now expected to finish replacing the C-5M tentatively in fiscal 2050, when the youngest Galaxy, built in 1989, will be 61 years old.

For how the Galaxy compares with the smaller airlifter beside it, see our C-5 Galaxy vs C-17 comparison, and for the wider field, our list of the largest cargo planes.

The verdict

The C-5 Galaxy is the bigger aircraft, and not narrowly. It is about 88 feet longer, nearly 38 feet wider, and lifts four times the B-52’s load.

The B-52 flies farther, faster and higher, and it carries a wider range of weapons than anything else the Air Force flies. The Galaxy moves the heavy equipment of a war; the bomber delivers the weapons.

Both first flew more than half a century ago, and both are due to fly until about 2050. For where they sit among the other giants, see our lists of the biggest military airplanes and the best bombers in the world.