Monthly Archives: April 2025

5 April 1968

Flt-Lt. Pollock flies his Hawker Hunter through the Tower Bridge, 5 April 1968. Illustration by Flight Artworks.

Friday, 5 April 1968: Flight Lieutenant Alan Richard Pollock, No. 1 Squadron, Royal Air Force, based at RAF West Raynham, southwest of Fakenham, Norfolk, was leading a flight of four Hawker Hunter FGA.9 close air support fighters. Pollock described the weather:

“Over London the weather was still one of those rare perfect 8/8 Gordon’s crystal, gin clear days when all the colours shout out brightly.”

Pollock broke away from the formation and flew toward London.

FLIGHT International reported:

Hunter to Tower—Under

     An RAF Hunter few through the Tower Bridge, London, in a down-river direction just after noon last Friday, April 5. The Hunter, carrying underwing tanks, was glimpsed momentarily from Flight‘s offices in a descending, mushing turn until lost to sight behind United Africa House. Previous flights through Tower Bridge—never in a jet, and never so fast—have invariably been made in an up-river direction.

     The MoD was investigating as we closed for press; the supposition was that the aircraft was an FGA.9 of 1 or 54 Squadrons, which comprise the close-support wing at RAF West Raynham. The station refused comment, but flying was taking place that day. Visibility was excellent. Some authorities attributed the incident to widespread resentment that the RAF had been deprived of a ceremonial fly-past on the 50th anniversary day, April 1. The Red Arrows were expecting to make this fly-past last month, but permission was presumably denied. A Ministry of Defence spokesman to whom we were referred at press time by the duty officer at RAF West Raynham, was not then able to reveal the name of the pilot.

FLIGHT International, Vol. 93, Number 3083, 11 April 1968, at Page 500, Column 3

Diagram of Tower Bridge, with dimensions. (Wikipedia)

. . . and the following week:

The Man Who Shot the Bridge

     The RAF pilot who flew a Hunter FGA.9 through Tower Bridge, London, on April 5 was no youthful prankster but a senior flight commander of 1 Sqn, RAF West Raynham, an Old Cranwellian, and the father of four children.

     He was Flt Lt Alan Richard Pollock, aged 32. He was named on Sunday, April 7, by MoD (Air) too late, owing to Easter press schedules, for mention in our last week’s story. Flt Lt Pollock was placed under close arrest on April 5 and released into open arrest on April 7. A board of inquiry was convened at West Raynham on April 8. An all-party motion signed by six MPs [Members of Parliament] was tabled in the Commons in his support but was ruled unacceptable.

     Whatever their views on the responsibility and possible consequences of flying a jet fighter through the 200ft-wide, 110ft-deep aperture framed by the towers, the bascules and the upper span of Tower Bridge, there is unanimity among pilots that it was a handsome piece of flying.

     Flt Lt Pollock was the first pilot to fly through the bridge in a downstream direction, following the gentle sinuousities of King’s Reach from the Waterloo Bend—and passing over Blackfriars’ two bridges (road and rail), Southwark Bridge, Cannon Street rail bridge, and London Bridge. After clearing the last he probably had little more than five seconds to align himself with the eye of the needle presented by Tower Bridge, retaining until the last fraction of a second the option of pulling up had he found the opening partly obstructed by abnormally high vehicles, by hanging cradles or by the bascules opening.

     It has been reported that Flt Lt Pollock peeled off from a formation returning from RAF Tangmere, where he had led four Hunters on display duties. This might have accounted for his choice of direction. The absence of pre-placed photographers, who always seem to have been around on previous Tower Bridge buzzings, seems to rule out premeditation. Another explanation of why he preferred the crane-lined Upper Pool downstream of Tower Bridge for his climb-out when all previous pilots have used it for the run in may have been to avoid climbing through the flight levels occupied by airliners on the approach to Heathrow had he made a westerly climb-out. He turned to port over the City.

     The RAF and civil authorities were tussling last week about whether Flt Lt Pollock should be court-martialled or tried in a civil court. His one-man fly-past was construed in and outside the RAF as an expression of resentment felt by many in the Service—including those now responsible for deciding his punishment—of the way the Royal Air Force is being treated by the Government. It may be that the last straw was the cancellation of the 50th anniversary fly-past over the capital on April 1. A fly-past planned in conjunction with the Lancaster House dinner with the Queen was cancelled at the last moment as “inappropriate.” A mid-day fly-past, seen by the maximum number of Londoners and visitors, would have been most “appropriate” on this occasion.

     Attitudes to the Tower Bridge exploit of past and present members of the RAF whom we have questioned vary from the very strongly censorious to the frankly admiring; but an unvarying theme was that some RAF protest was called for, without infringing flying discipline.

FLIGHT International, Volume 93, Number 3084, 18 April 1968 at Page 567, Columns 1 and 2

The Royal Air Force did not court-martial Flight Lieutenant Pollack. A medical board discharged him from the service. The Ministry of Defence announced that Pollack had been hospitalized with pneumonia, and that, “. . . if he were brought to trial it would probably have a damaging effect on his health, both immediately and in the long term.”

An oral history recording with Alan Pollack (32 minutes, 20 seconds) is available at the Imperial War Museum:

https://www.iwm.org.uk/collections/item/object/80027439

This was not the first time an airplane had flown through Tower Bridge. On 10 August 1912, Frank McLean (later, Lieutenant Colonel Sir Francis Kennedy McLean, A.F.C.) flew his modified Short S.33 float plane, and, according to his obituary in The Times, 12 August 1955, “. . . created a record by flying up the Thames in a seaplane, passing between the upper and lower parts of Tower Bridge and under London Bridge without touching the water.”

Frank McLean flying through the Tower Bridge, 10 August 1912. (Clan Maclean)

Alan Pollock was flying a Hawker Hunter FGA.9, XF442, c/n S4/U/3318. It had been converted from a Hunter F.6 interceptor. The Hunter was a single-seat, single-engine, swept-wing jet fighter, which first entered service with the Royal Air Force in 1954. The FGA.9 ground attack variant was based on the Hunter F.6 interceptor.

Hawker Hunter FGA.9 XF511, photographed in 1974. This is the same type aircraft as that flown by Flight Lieutenant Pollack, 5 April 1968. (Mike Freer/Wikipedia)

The FGA.9 was 33 feet, 8 inches (10.262 meters) long with a wingspan of 45 feet, 10½ inches (13.983 meters) and height of 13 feet, 2 inches (4.013 meters). The wing area was 340 square feet (31.6 square meters). The wings were swept back 40° at ¼-chord, and had an angle of incidence of 1½°. There is noticeable anhedral. The FGA.9 had and empty weight of 13,010 pounds (5,901 kilograms) and maximum takeoff weight of 18,000 pounds (8,165 kilograms).

The FGA.9 was powered by a single Rolls-Royce RA.28 Avon 207 engine. This was a single-shaft axial-flow turbojet with a 15-stage compressor and 2-stage turbine. The RA.28 was 10 feet, 3.0 inches (3.124 meters) long, 3 feet, 5.5 inches (1.054 meters) in diameter, and weighed 2,869 pounds (1,301 kilograms). It was rated at 10,050 pounds of thrust (44.7 Kilonewtons).

Hawker Hunter FGA.9 XF442 at RAF Lossiemouth, 1979. This is the airplane flown through Tower Bridge, 5 April 1968. (Peter Nicholson via Airport-Data.com)

The Hunter FGA.9 had a maximum speed of 702 miles per hour at 15,000 feet (4,572 meters)—0.97 Mach—and maximum range of 1,850 miles (2,977 kilometers) with external fuel tanks.

The basic armament of the Hunter were four 30 mm ADEN autocannon installed in a removable gun pack, along with 150 rounds of ammunition per gun. The ADEN was a gas-operated revolver cannon, capable of firing 1,200–1,400 rounds per minute. The FGA.9 could also carry a 1,000 pounds (454 kilograms) bomb under each wing, twenty-four 3-inch rockets, or two rocket pods with thirty-seven 2-inch rockets, each, for ground attack.

Hawker produced 144 of the Hunter FGA.9 ground attack variant, with 12 modified from F.6 interceptors. Most of Hawker’s foreign sales were based on the FGA.9.

Hawker Hunter FGA.9 XF442 was transferred to the Fuerza Aérea de Chile, 24 April 1982, and assigned identification number J-742. It crashed near Antofagasta, in northern Chile, 20 May 1982.

Alan Pollock was recently interviewed for the Daily Mail:

http://www.dailymail.co.uk/news/article-5571423/RAF-veteran-pilot-82-relives-split-second-decision-fly-busy-Tower-Bridge.html

© 2018, Bryan R. Swopes

5 April 1950

Martin JRM-3 Mars Bu. No. 76822, Marshall Mars, burning off Diamond Head, Oahu, Hawaiian Islands, 5 April 1950. (U.S. Navy)
Martin JRM-3 Mars Bu. No. 76822, Marshall Mars, burning off Diamond Head, Oahu, Hawaiian Islands, 5 April 1950. (U.S. Navy)

5 April 1950: While on a test flight following an engine change, a United States Navy Martin JRM-3 Mars seaplane, Marshall Mars, Bu. No. 76822, suffered an engine fire (inboard, left wing) and made an emergency landing at Ke’ehi Lagoon, off Diamond Head, Hawaii. The airplane’s crew was rescued but the airplane exploded and sank.

The wreck was discovered on the sea floor in August 2004 at a depth of approximately 1,400 feet (427 meters).

The Martin JRM Mars was a large four-engine flying boat transport built by the Glenn L. Martin Company for the U. S. Navy. originally designed as a patrol bomber, the prototype XPB2M-1 Mars made its first flight on 3 July 1942, Only five transport variants 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 MarsHawaii MarsPhilippine MarsMarshall 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.

Four Martin JRM-3 Mars flying boats in formation. (U.S. Navy)
Four Martin JRM-3 Mars flying boats in formation. (U.S. Navy)

The Martin JRM-2 Mars had a normal crew of 4, with accommodations for a relief crew. It was designed to carry 138 combat troops or 34,000 pounds (15,422 kilograms) of cargo. It was 120 feet, 3 inches (36.652 meters) long with a wingspan of 200 feet, 0 inches (60.960 meters) and height of 43 feet, 8 inches (13.310 meters), with beaching gear. The wing area was 3,686 square feet (342.4 square meters). The flying boat had an empty weight of 80,701 pounds (36,605 kilograms) and a maximum takeoff weight (MTOW) 0f 165,000 pounds (74,843 kilograms).

Martin JRM-2 Mars three-view illustration with dimensions. (U.S. Navy)

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 the flying boats. . . .”

Martin JRM-3 Mars, Bu.No. 76822, Marshall Mars. (U.S. Navy)
Martin JRM-3 Mars, Bu.No. 76822, Marshall Mars. (U.S. Navy)

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 0.4375:1 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 165 knots (190 miles per hour/306 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 statute miles/7,019 kilometers).

A U.S. Navy Martin JRM Mars. (Glenn L. Martin Co.)
A U.S. Navy Martin JRM Mars. (Glenn L. Martin Co.)

© 2019, Bryan R. Swopes

4 April 1975

Lockheed C-5A Galaxy 68-0218 lifts off from Tan Son Nhut Air Base, South Vietnam, 4 April 1975. (CORBIS)
Lockheed C-5A Galaxy 68-0218 lifts off from Tan Son Nhut Air Base, South Vietnam, 4:00 p.m., Friday, 4 April 1975. (CORBIS)

4 April 1975: Operation Babylift. As the end of the Vietnam War approached, it was decided to evacuate 2,000 orphans, most in the care of an American hospital in Saigon, Republic of South Vietnam, and to take them to safety within the United States. The first flight was aboard a U.S. Air Force Lockheed C-5A Galaxy heavy lift transport, serial number 68-0218, piloted by Captains Dennis W. Traynor III and Tilford Harp.

A medical team from Clark Air Base, The Philippines, commanded by First Lieutenant Regina Claire Aune, Nurse Corps, United States Air Force, was aboard when the huge transport plane landed at Tan Son Nhut Air Base in Saigon. When it was discovered that there would be about 250 orphans aboard, many of them sick or injured, another medical team from a C-141 Starlifter volunteered to accompany Lieutenant Aune’s team for the outbound flight.

When the Galaxy took off from Saigon at 4:00 p.m., there were 328 people aboard, including flight crew, medical teams, orphans and their escorts, as well as other U.S. personnel.

The C-5A quickly climbed to 23,000 feet (7,010 meters). Just a few minutes after takeoff, the locks of the rear loading ramp failed. Explosive decompression hurled people and equipment throughout the airplane which instantly filled with fog. Lieutenant Aune was thrown the entire length of the upper deck. The airplane was severely damaged with two hydraulic systems inoperative and many flight control cables severed.

The pilots could only control the airplane with engine thrust. They began an emergency descent and turned back to Tan Son Nhut.

Helicopters standing by near the wreck of the Lockheed C-5A Galaxy. (NPR)

Unable to maintain flight, at about 4:45 p.m., the Galaxy touched down in a rice paddy two miles short of the runway at 270 knots (500 kilometers per hour). It slid for a quarter mile, became airborne for another half mile, then touched down and slid until it hit a raised dike and broke into four sections. 138 people were killed in the crash.

Wreckage of the Lockheed C-5A Galaxy transport. (NPR)
Colonel Regina C. Aune, USAF NC (U.S. Air Force)
Colonel Regina Claire Aune, NC USAF (U.S. Air Force)

Although herself seriously injured, Lieutenant Aune began evacuating the children. When rescue helicopters arrived, they were unable to land close to the wrecked transport, so the children had to be carried.

After she had helped to carry about eighty babies, Regina Aune was unable to continue. She asked the first officer she saw to be relieved of her duties and then passed out. At a hospital it was found that she had a broken foot, broken leg and broken vertebra in her back, as well as numerous other injuries.

Cheney Award (U.S. Air Force)

Regina Aune became the first woman to be awarded the Cheney Award by the Air Force, which was established in 1927 and is awarded “to an airman for an act of valor, extreme fortitude or self-sacrifice in a humanitarian interest, performed in connection with aircraft, but not necessarily of a military nature.

11 members of the crew of the Galaxy were among the dead, including Captain Mary Therese Klinker, Nurse Corps, United States Air Force.

Captain Mary T. Klinker, NC USAF. (St. Elizabeth’s School of Nursing)

Mary Therese Klinker was born at Lafayette, Indiana, 3 October 1947. She was the daughter of Paul Edward Klinker and Thelma Mary Deane Klinker. She attended Central Catholic High School in Lafayette, graduating in 1965. She then enrolled at St. Elizabeth’s School of Nursing, also in Lafayette. She graduated as a Registered Nurse, May 1968. On graduation, Miss Klinker worked for St. Elizabeth’s.

Miss Klinker joined the United States Air Force, 9 January 1970, and was commissioned as a lieutenant in the Nurse Corps. She qualified as a flight nurse and was promoted to the rank of captain. In 1974, Captain Klinker was assigned to the 10th Aeromedical Evacuation Squadron, Travis Air Force Base, Fairfield, California.

Airman’s Medal

Captain Mary Therese Klinker, Nurse Corps, United States Air Force, 10th Aeromedical Evacuation Squadron, was the last United States service woman to die in the Vietnam War. Captain Klinker was posthumously awarded the Airman’s Medal and the Meritorious Service Medal. She is buried at St. Boniface Cemetery in her home town of Lafayette, Indiana.

Colonel Regina C. Aune had a very impressive career in the Air Force. She earned a master of Science in Nursing degree, and a Ph.D. She served as Chair of the Department of Nursing Research, Commandant of the Graduate School of Nursing and Deputy Brigade Commander at the Uniformed Services University of the Health Sciences. Aune commanded the 437th Medical Operations Squadron and the 437th Medical Group, Charleston AFB, the 377th Medical Group, Kirtland AFB, the 59th Medical Group, Lackland AFB, and the 386th Expeditionary Medical Group, Kuwait in support of Operation IRAQI FREEDOM. She retired in 2007, and passed away, 27 March 2024.

The pilots, Captain Dennis W. Traynor III and Captain Tilford W. Harp, were both awarded the Air Force Cross for what General Paul Carlton, Commander, Military Airlift Command, called “one of the greatest displays of airmanship I have ever heard related.”

Capt. Bud Traynor was piloting the C-5A Galaxy that crashed in 1975 in Saigon as part of Operation Babylif
Captain Dennis W. Traynor III, United States Air Force

AIR FORCE CROSS

CAPTAIN DENNIS W. TRAYNOR III

Action Date: 3-Apr-75

Service: Air Force

Rank: Captain

Company: 22d Airlift Squadron

Division: Clark Air Base, Philippine Islands

Air Force Cross
Air Force Cross

The President of the United States of America, authorized by Title 10, Section 8742, United States Code, takes pleasure in presenting the Air Force Cross to Captain Dennis W. Traynor, III, United States Air Force, for extraordinary heroism and airmanship while engaged in a humanitarian mission as Aircraft Commander of an Air Force C-5A aircraft of the 22d Airlift Squadron, Clark Air Base, Philippine Islands, in action at Saigon, Vietnam on 3 April 1975. On that date, the aircraft, carrying 330 passengers and crew, experienced a serious in-flight emergency which could have resulted in the loss of life for all aboard. With no aircraft controls except one aileron and the engines, Captain Traynor guided the crippled aircraft to a crash landing in a rice paddy, thereby saving the lives of 176 of the people on board. Through his extraordinary heroism, superb airmanship, and aggressiveness, Captain Traynor reflected the highest credit upon himself and the United States Air Force.

AIR FORCE CROSS

CAPTAIN TILFORD W. HARP

Action Date: 3-Apr-75

Service: Air Force

Rank: Captain

Company: 22d Airlift Squadron

Division: Clark Air Base, Philippine Islands

Air Force Cross
Air Force Cross

The President of the United States of America, authorized by Title 10, Section 8742, United States Code, takes pleasure in presenting the Air Force Cross to Captain Tilford W. Harp, United States Air Force, for extraordinary heroism and airmanship while engaged in a humanitarian mission as Co-Pilot of an Air Force C-5A aircraft of the 22d Airlift Squadron, Clark Air Base, Philippine Islands, in action at Saigon, Vietnam, on 3 April 1975. On that date, his aircraft, carrying 330 passengers and crew, experienced a serious in-flight emergency which could have resulted in the loss of life for all aboard. With no aircraft controls except one aileron and the engines, Captain Harp provided exceptionally vital assistance to the Aircraft Commander in guiding the crippled aircraft to a crash landing in a rice paddy, thereby saving the lives of 176 of the people on board. Through his extraordinary heroism, superb airmanship, and aggressiveness, Captain Harp reflected the highest credit upon himself and the United States Air Force.

Crash site of Operation Babylift's Lockheed C-5A Galaxy, 68-0218, near Tan Son Nhut Air Base, South Vietnam, 4 April 1975. (U.S. Air Force)
Crash site of Operation Babylift’s Lockheed C-5A Galaxy, 68-0218, near Tan Son Nhut Air Base, South Vietnam, 4 April 1975. (U.S. Air Force)

© 2019, Bryan R. Swopes

4 April 1968: 12:00:01.38 UTC, T plus 00:00:00.38

Apollo 6/Saturn V AS-502 launch from LC-39A, 12:00:01.38 UTC, 4 April 1968. (National Aeronautics and Space Administration NASA 68-HC-201)

4 April 1968: At 07:00:01.38 EST (12:00:01.38 UTC), Apollo 6 (AS-502), the second and last unmanned Apollo mission, lifted off from Launch Complex 39A, Kennedy Space Center, Cape Canaveral, Florida. First motion was detected at Range Time 00:00:00.38. The purpose of the flight was to determine that an all-up Saturn V could attain Trans Lunar Injection. Because of engine difficulties, it did not do so, but data from the test gave mission planners confidence to go ahead with manned flights.

Apollo 6/Saturn V AS-502 lifts off from Launch Complex 39A, Kennedy Space Center, Cape Canaveral, Florida, 12:00:01.38 UTC, 4 April 1968. (National Aeronautics and Space Administration)

At T+2:05 the Saturn V experienced a severe “pogo” oscillation, but no structural damage occurred. Next, several structural panels from the lunar module adaptor section were lost due to a manufacturing defect. Finally, during the second stage burn, two of the five Rocketdyne J-2 engines shut down prematurely. Because of this, the planned circular orbit at 175 kilometers altitude was not achieved, instead, the spacecraft entered a 106.9 × 138.6 miles (172.1 × 223.1 kilometers) orbit, circling Earth in 89.8 minutes.

After two orbits, it was planned to send Apollo 6 to the Trans Lunar Injection point, but the third stage engine would not fire. The Service Module engine was used to boost the spacecraft to a peak altitude of 13,810.2 miles (22,225.4 kilometers) and a planned lunar re-entry simulation was carried out. Apollo 6 reached 22,385 miles per hour (36,025 kilometers per hour) as it reentered the atmosphere. 9 hours, 57 minutes, 20 seconds after launch, Apollo 6 splashed down in the Pacific Ocean north of Hawaii and was recovered by USS Okinawa (LPH-3).

Apollo 6/Saturn V AS-502. (National Aeronautics and Space Administration NASA S68-27366)

The Saturn V rocket was a three-stage, liquid-fueled heavy launch vehicle. Fully assembled with the Apollo Command and Service Module, it stood 363 feet (110.642 meters) tall. The first and second stages were 33 feet (10.058 meters) in diameter. Fully loaded and fueled the rocket weighed 6,200,000 pounds (2,948,350 kilograms). It could lift a payload of 260,000 pounds (117,934 kilograms) to Low Earth Orbit.

The first stage was designated S-IC. It was designed to lift the entire rocket to an altitude of 220,000 feet (67,056 meters) and accelerate to a speed of more than 5,100 miles per hour (8,280 kilometers per hour). The S-IC stage was built by Boeing at the Michoud Assembly Facility, New Orleans, Louisiana. It was 138 feet (42.062 meters) tall and had an empty weight of 290,000 pounds (131,542 kilograms). Fully fueled with 203,400 gallons (770,000 liters) of RP-1 and 318,065 gallons (1,204,000 liters) of liquid oxygen, the stage weighed 5,100,000 pounds (2,131,322 kilograms). It was propelled by five Rocketdyne F-1 engines, producing 1,522,000 pounds of thrust (6770.19 kilonewtons), each, for a total of 7,610,000 pounds of thrust at Sea Level (33,850.97 kilonewtons).¹ These engines were ignited seven seconds prior to lift off and the outer four burned for 168 seconds. The center engine was shut down after 142 seconds to reduce the rate of acceleration. The F-1 engines were built by the Rocketdyne Division of North American Aviation at Canoga Park, California.

Apollo 6/Saturn V AS-502 S-/S-II interstage falling away. (NASA 68-HC-193)

The S-II second stage was built by North American Aviation at Seal Beach, California. It was 81 feet, 7 inches (24.87 meters) tall and had the same diameter as the first stage. The second stage weighed 80,000 pounds (36,000 kilograms) empty and 1,060,000 pounds loaded. The propellant for the S-II was liquid hydrogen and liquid oxygen. The stage was powered by five Rocketdyne J-2 engines, also built at Canoga Park. Each engine produced 232,250 pounds of thrust (1,022.01 kilonewtons), and combined, 1,161,250 pounds of thrust (717.28 kilonewtons).

The Saturn V third stage was designated S-IVB. It was built by Douglas Aircraft Company at Huntington Beach, California. The S-IVB was 58 feet, 7 inches (17.86 meters) tall with a diameter of 21 feet, 8 inches (6.604 meters). It had a dry weight of 23,000 pounds (10,000 kilograms) and fully fueled weighed 262,000 pounds. The third stage had one J-2 engine and also used liquid hydrogen and liquid oxygen for propellant. The S-IVB would place the Command and Service Module into Low Earth Orbit, then, when all was ready, the J-2 would be restarted for the Trans Lunar Injection.

Eighteen Saturn V rockets were built. For more than 50 years, they were the most powerful machines ever built by man.

¹ The five Rocketdyne F-1 engines of the AS-502 S-IC first stage produced a combined thrust of 7,567,000 pounds (33,660 kilonewtons), 15,000 pounds (67 kilonewtons) less than predicted.

© 2025, Bryan R. Swopes

4 April 1945

Ford B-24M 44-50838 blown in half by an Me 262, 4 April 1945. (U.S. Air Force)
Ford B-24M 44-50838 blown in half by an Me 262, 4 April 1945. (U.S. Air Force)

4 April 1945: 0928 at 51°31′ N., 10°18′ E, east of Hamburg, Germany, a Messerschmitt Me 262 A-1 Schwalbe twin-engine jet fighter shot down this B-24 with an R4M rocket.¹

The four-engine bomber was a Ford B-24M-10-FO Liberator, serial number 44-50838—a very long range heavy bomber assigned to the 714th Bombardment Squadron (Heavy), 448th Bombardment Group (Heavy), and based at RAF Seething (USAAF Station 146), Norwich, England.

No parachutes were seen.²

Germany surrendered 31 days after this photograph was taken.

Lieutenant Robert L. Mains’ crew during combat training. Standing, left to right: Corporal Charles H. Daman, Nose Gunner; Corporal Charles E. Cupp, Jr., Radio Operator; George S. Alexander, Top Turret Gunner; (unknown); Antonio Munoz, Jr., and (unknown). Kneeling, (Unknown); 1st Lieutenant Robert L. Mains, Aircraft Commander; 1st Lieutenant Allen L. Lake, Navigator; and (Unknown). Daman, Cupp, Alexander, Lake and Mains were aboard 44-50838 when it was shot down. (American Air Museum in Britain)
1st Lieutenant Robert L. Mains, aircraft commander of B-24M 44-50838, was killed in action, 4 April 1945. His remains, identified by DNA and physical evidence, were returned to the United States in October 2017, and interred at Calverton National Cemetery, Calverton, New York. (Department of Defense)
Oberleutnant Rudolf Rademacher (1913–1953)

¹ Ford B-24M-10-FO Liberator 44-50838 was shot down with an R4M rocket fired from a Messerschmitt Me 262 A-1 twin-engine jet fighter, flown by Oberleutnant Rudolf Rademacher of Gruppe II, Jagdgeschwader 7 (11./JG 7), based at Parchim, Germany. Rudi Rademacher was a veteran of more than 500 combat missions, credited with at least 97 victories (and as many as 126), including 16 four-engine heavy bombers.

² TDiA has been informed by his grandaughter that Radio Operator, Technical Sergeant Charles E. Cupp, Jr., did survive. He was able to escape from the doomed bomber through its bomb bay. He was captured and held as a Prisoner of War.

³ MISSING AIR CREW REPORT:

© 2018, Bryan R. Swopes