Lockheed C-5A Galaxy 66-8304, the second one built, during a test flight near Edwards AFB. (U.S. Air Force)
15 June 1969: At Edwards Air Force Base, California, the second Lockheed C-5A Galaxy transport, 66-8304, set several records, including the heaviest takeoff weight, 762,800 pounds (346,000 kilograms), and the heaviest landing weight, 600,000 pounds (272,155 kilograms).
The Dayton Daily News reported:
C-5 Galaxy Heaviest Ever Flown
The world’s largest airplane, the Air Force’s Lockheed C-5 Galaxy, took off weighing more than three-quarter of a million pounds Sunday, the heaviest weight ever flown in an aircraft.
The flight was made at Edwards Air Force Base, Calif., as a routine step in the continuing C-5 test program, according to Aeronautical Systems Division officials at Wright-Patterson AFB, where the C-5 program is managed.
THE PLANE WEIGHED 762,000 pounds at takeoff. This included 325,000 pounds for the plane itself, 50,000 pounds of test equipment, 233,000 pounds of fuel, and 154,000 pounds of water ballast simulating cargo.
Previously the C-5 had taken off at a record weight of 728,100 pounds.
THE HEAVYWEIGHT was the No. 2 C-5, which flew from Marrietta, Ga., where teh planes are built by the Lockheed Georgia Co., to Edwards.
Meantime, C-5 No. 5, which will come to Wright-Patterson next year, has made its maiden flight at Dobbins AFB, Ga.
The big transport plane flew for an hour and 25 minutes over north Georgia last Thursday.
THE PLANE IS SCHEDULED to arrive at ASD’s directorate of flight test for all-weather testing in March, 1970.
—Dayton Daily News, Vol. 92, No. 281, Monday, June 16, 1969, at Page 3, Column 1
Lockheed C-5A Galaxy 66-8304 arrived at The Boneyard, 2004. It was the fifth C-5 to be retired. (Phillip Michaels/AMARC)Lockheed C-5A Galaxy 66-8304 in the reclamation area at Davis-Monthan Air Force Base, Tucson, Arizona. (Phillip Michaels/AMARC)
Antonov An-225 Mriya with Buran at Paris Air Show, 5 June 1989. (Ralf Manteufel)
5 June 1989: The Antonov An-225 Мрия (Mriya—Dream in the Ukranian language) took off from Kiev with the space shuttle Buran, enroute to the Paris Air Show. The total weight at takeoff was a 1,234,600 pounds (560,005 kilograms)—the greatest weight ever lifted by an aircraft.
The An-225 was derived from the earlier four-engine An-124. It is operated by a flight crew of 6–7. The airplane is 84.00 meters (275.59 feet) long, with a wingspan of 88.40 meters (290.03 feet) and height of 18.10 meters (59.38 feet). The total wing area is 905.0 square meters (9,741.3 square feet).
Mriya weighs approximately 250,000 kilograms (551,156 pounds), empty, and its maximum takeoff weight (MTOW) is 600,000 kilograms (1,322,774 pounds). The maximum payload is 250,000 kilograms (551,156 pounds pounds).
The cargo hold of the An-225 is 43.35 meters (142.22 feet) long, 6.40 meters (21.00 feet) wide and 4.40 meters (14.44 feet) high. The usable volume is 1,300 cubic meters (45,909 cubic feet).
The Antonov An-225 climbing out. (Flightradar24)
The An-225 is powered by six Ivchenko Progress (Lotarev) D-18T turbofan engines producing 229.848 kilonewtons (51,672 pounds of thrust), each. The D-18T is a three-spool axial-flow high-bypass turbofan engine. The 15-stage compressor has a single-stage fan, 7 intermediate-pressure-, and 7 high-pressure stages). The 6-stage turbine consists of 1 high- and 1 intermediate-pressure stages, and 4-stage fan turbine. The engines are 5.400 meters (17.717 feet) long, 2.937 meters (9.636 feet) high and 2.792 meters (9.160 feet) wide. they weigh 4,100 kilograms (9,039 pounds), each.
The transport has cruise speed of 700 kilometers per hour (435 miles per hour) and its maximum speed is 850 kilometers per hour (528 miles per hour). The service ceiling is 11,145 meters (36,565 feet). Mriya carries a maximum fuel load of 300,000 kilograms (661,387 pounds, or 98,567 U.S. gallons, Jet A-1), and has a practical range of 4,500 kilometers (2,796 miles). Its maximum range of 15,400 kilometers (9,569 miles).
four view illustration
The world’s heaviest airplane, Mriya was the only one in existence. It was built specifically to transport Buran. A second An-225 was partially constructed, but never finished.
The An 225 was destroyed during the Battle of Antonov Airport, 24–25 February 2022.
Wreckage of the Antonov An 225 Mriya. (Oleksandr Ratushniak)
Buran, the Soviet space shuttle, made one unmanned flight into orbit, 15 November 1988. It was destroyed 12 May 2002 when its hangar collapsed, killing eight Workers.
General Dwight D. Eisenhower talking with Lieutenant Wallace C. Strobel and paratroopers of Co. E, 2nd Battalion, 506th Parachute Infantry Regiment, 101st Airborne Division, United States Army (the legendary “Band of Brothers”), at Greenham Common, 2030 hours, 5 June 1944 (U.S. Army)
5–6 June 1944 (D-Day -1): Beginning in the late evening, 821 Douglas C-47 Skytrain twin-engine transports, and 516 Waco CG-4A and Airspeed AS.51 Horsa gliders of the IXth Troop Carrier Command, airlifted 13,348 paratroopers of the 82nd and 101st Airborne Divisions, United States Army, and another 7,900 men of the British Army 6th Airborne Division and the 1st Canadian Parachute Battalion.
C-47 Skytrains in Vee-of-Vees formation.
The airplanes flew in a Vee-of Vees formation, nine airplanes abreast, 100 feet (30 meters) from wing tip to wing tip, 1,000 feet (305 meters) in trail, stretching for over 300 miles (483 kilometers). They flew in darkness at an altitude of 500 to 1,000 feet (152–305 meters).
Their mission was to drop the paratroopers behind the invasion beaches of Normandy during the hours before the amphibious assault began on D-Day.
Martin JRM-3 Mars, Bu. No. 76822, Marshall Mars. (U.S. Navy)
19 May 1949: Martin JRM-3 Mars, Marshall Mars, United States Navy Bureau of Aeronautics serial number (Bu. No.) 76822 flew from the Alameda Naval Air Station on the east shore of San Francisco Bay, to San Diego Bay, a distance of approximately 450 miles (725 kilometers). On board, in addition to the flight crew of 7, were 301 passengers.
Martin JRM-3 Marshall Mars with its passengers. (NOAA)
The Associated Press wire service reported the story:
NAVY’S BIG FLYING BOAT MARSHALL MARS CARRIES 301 PERSONS
SAN FRANCISCO, May 19—(AP)—The Navy’s big flying boat Marshall Mars carried a record load of 301 passengers—plus seven crewmen—on a flight to San Diego today.
It had never carried more than 269 passengers before.
The 1:52 p.m. takeoff, from the naval air station at Alameda, across the bay, was uneventful.
Today’s passengers are personnel of Air Group 5, Alameda Naval Air Station, who are being transferred to San Diego. Mattresses on the floor were provided for men unable to find seats.
Four Martin JRM-3 Mars flying boats in formation. In the foreground is Philippine Mars, Bu. No. 76820. The second airplane is Marianas Mars, Bu. No. 76821. (U.S. Navy)
The Martin JRM Mars was a large four-engine flying boat transport built by the Glenn L. Martin Company for the U. S. Navy. Only five were built, four designated JRM-1, with the last one being a JRM-2. Each airplane was given an individual name derived from the names of island chains in the Pacific Ocean: Marianas Mars, Hawaii Mars, Philippine Mars, Marshall Mars and Caroline Mars. These airplanes were used to transport personnel and cargo between the West Coast of the United States and the Hawaiian Islands. All were upgraded to JRM-3.
The Martin JRM-3 Mars had a normal crew of 4, with accommodations for a relief crew. It was designed to carry 133 combat troops or 32,000 pounds (14,515 kilograms) of cargo. It was 120 feet, 3 inches (36.652 meters) long with a wingspan of 200 feet (60.960 meters) and height of 38 feet, 5 inches (11.709 meters). The flying boat had an empty weight of 80,701 pounds (36,605.4 kilograms). The maximum takeoff weight (MTOW) was 165,000 pounds (74,842.7 kilograms).
A NASA publication states, “A zero-lift drag coefficient of 0.0233 and a maximum lift-drag ratio of 16.4 made the JRM the most aerodynamically efficient of any of of the flying boats. . . .”
The Martin Mars was powered by four air-cooled, supercharged, direct-fuel-injected, 3,347.662-cubic-inch-displacement (54.858 liter) Wright Aeronautical Division R-3350-24WA (Cyclone 18 825C18BD1) (also known as the Duplex-Cyclone), a two-row 18-cylinder radial engines with a compression ratio of 6.70:1 and water/alcohol injection. This engine has a normal power rating of 2,000 horsepower at 2,400 r.p.m at 5,500 feet (1,676 meters) and 1,800 horsepower at 2,400 r.p.m. at 15,000 feet (4,572 meters). The engine’s takeoff power rating is 2,500 horsepower at 2,900 r.p.m. 100/130 octane aviation gasoline was required. The engines drove four-bladed 16 foot, 8 inch (5.080 meter) Curtiss Electric variable-pitch propellers through a 0.375:1 gear reduction. (After modification to the JRM-3, the propellers on the inboard engines were reversible.) The R-3350-24WA is 6 feet, 8.58 inches (2.047 meters) long, and 4 feet, 6.13 inches (1.375 meters) in diameter. Its dry weight is 2,822 pounds (1,280 kilograms).
The JRM-3 had a cruise speed of 135 knots (155 miles per hour/250 kilometers per hour) and a maximum speed of 211 knots (243 miles per hour/391 kilometers per hour) at 15,600 feet (4,755 meters). The service ceiling was 19,700 feet (6,005 meters) and its range was 3,790 nautical miles (4,361 miles per hour/7,019 kilometers) at 135 knots.
On 5 April 1950, Marshall Mars had an engine fire and made an emergency landing off Diamond Head, Hawaii. The crew was rescued but the airplane exploded and sank. The wreck was discovered on the sea floor in August 2004.
The remaining airplanes were later converted to fire fighting airplanes in Canada. Only two remain.
Martin JRM-3 Mars, Bu. No. 76822, Marshall Mars, burning off Diamond Head, Oahu, Territory of the Hawaiian Islands, 5 April 1950. (U.S. Navy)
19 May 1934: Soviet test pilot Mikhail Mikhaylovich Gromov made the first flight of the Tupolev ANT-20 Maxim Gorky. This was the largest airplane of its time. Designed by Andrei Tupolev to carry 72 passengers, the giant airplane was operated by eight crew members.
Used primarily as a Soviet propaganda tool, it also carried a powerful broadcast radio station, a printing shop, and loudspeakers.
Constructed of corrugated sheet metal for rigidity and strength, the ANT-20 was 107 feet, 11¼ inches (32.899 meters) long, with a wingspan of 206 feet, 8¼ feet inches (62.998 meters) and height of 34 feet, 9¼ inches (10.598 meters). Its empty weight was 62,700 pounds (28,440.2 kilograms) and the maximum takeoff weight was 116,600 pounds (52,888.9 kilograms)
Tupolev ANT-20 six-engine civil transport. Two additional engines would be added later. (Tupolev)
The ANT-20 was powered by eight liquid-cooled, supercharged, 2,896.1-cubic-inch-displacement (46.928 liter) Mikulin AM-34FRN single overhead cam (SOHC) 60° V-12 engines, rated at 1,200 horsepower at 2,000 r.p.m., each. They drove two-bladed propellers. Two of the engines were mounted above the fuselage, in a push-pull configuration.
Corrugated sheet metal was used for the skin of the ANT-20’s wings and fuselage.
Maxim Gorky had a maximum speed of 137 miles per hour (220.5 kilometers per hour), a service ceiling of 4,500 meters (14,764 feet) and a range of 750 miles (1,207 kilometers).
Just 364 days after its first flight, 18 May 1935, Maxim Gorky crashed following a mid-air collision during a formation flight over Moscow. 45 people were killed.
The ANT-20 flies over Red Square with an airplane off each wing.M.M. Gromov, 1917
Mikhail Mikhaylovich Gromov was born 24 February 1899, at Tver, about 110 miles (180 kilometers) northwest of Moscow. He was the son of Mikhail Konstantinovich Gromov, an “intellectual” who had studied medicine at Moscow University, and Lyubov Ignayevna Gromov, a midwife. The family were of the nobility, but poor.
The younger Gromov attended the Resurrection Real School, and then the Moscow Higher Technical School for Aviation. He graduated in 1917. Gromov was taught to fly by Boris Konstantinovich Welling, a pioneer in Russian long-distance flights. After working as a flight instructor, Gromov began test flying. He became the chief test pilot for the Tupolev Design Bureau. By the outbreak of World War II, he had test flown twenty-five different airplanes.
In 1926, Gromov made a non-stop long-distance flight in a Tupolev ANT-3, from Moscow via Berlin, Paris, Rome, Vienna, Prague, Warsaw and back to Moscow. The flight took 34 hours. In 1934, he flew a Tupolev ANT-25 12,411 kilometers (7,712 miles) in a closed circuit over 75 hours. For this accomplishment, he was named a Hero of the Soviet Union.
From 12–14 July 1937, Gromov set a world record for distance in a straight line, flying an ANT-25 from Moscow to San Jacinto, California, a distance of 10,148 kilometers (6,306 miles).¹ The duration of this flight was 62 hours, 17 minutes.
n March 1941, Gromov became the first director of the Flight Research Institute at Zhukovsky, southeast of Moscow. The Institute was later named the M.M. Gromov Flight Research Institute, in his honor.
In 1942, during The Great Patriotic War, Gromov commanded the Soviet long range air forces on the Kalinin Front. He next commanded the 3rd Air Army, 1942–1943, and the 1st Air Army, 1943–1944. In 1945, he returned to test flying.
Colonel General Mikhail Mikhaylovich Gromov, 1946
Following the War, Gromov continued to work in the aviation industry, but following a disagreement with the Minister of Aviation, Pyotr Vasilyevich Dementiev, over the issue of quality vs. quantity and the safety of the test pilots, he retired. Later, he entered politics and was twice elected to the Supreme Soviet.
During his military career, in addition to the Gold Star Medal of Hero of the Soviet Union, Colonel General Mikhail Mikhaylovich Gromov was awarded the Order of Lenin four times, the Order of the Red Banner (four), and the Order of the Red Star (three). He died 22 January 1985.
