Daily Archives: July 24, 2019

24 July 1950

Bumper 8 launch at Launch Complex 3, Cape Canaveral Air Force Station, Florida, 24 July 1950. The wooden structure in the foreground houses the firing crew and support personnel. (NASA)

24 July 1950: The first rocket launch at Cape Canaveral, Florida, took place. Bumper 8 was a two-stage rocket consisting of a captured German V-2 ballistic missile as the first stage and a WAC Corporal sounding rocket as the upper, second, stage. The rocket lifted off from Launch Complex 3 at the Cape Canaveral Air Force Station and followed a ballistic trajectory over the Joint Long Range Proving Ground. This was a low-angle atmospheric flight. The WAC Corporal reached an altitude of 10 miles (16.1 kilometers) and traveled 200 miles (322 kilometers) downrange.

The Bumper Project was a U.S. Army Ordnance Corps program, with overall responsibility contracted to the General Electric Corporation. The V-2s used in the Bumper Project were modified at accept the WAC Corporal second stage. Compressed air was used to separate the stages after the V-2 engine was cut off.

The V2, or Vergeltungswaffen 2 (also known as the A4, Aggregat 4) was a ballistic missile weighing 28,000 pounds (12,500 kilograms) when fully loaded. It carried a 2,200 pound (1,000 kilogram) explosive warhead of amatol, a mixture of TNT and ammonium nitrate. Propellant was a 75/25 mixture of of ethanol and water with liquid oxygen as oxidizer.

When launched, the rocket engine burned for 65 seconds, accelerating the rocket to 3,580 miles per hour (5,761 kilometers per hour) on a ballistic trajectory. The maximum range of the rocket was 200 miles (322 kilometers) with a peak altitude between 88 and 128 miles (142–206 kilometers), depending on the desired range. On impact, the rocket was falling at 1,790 miles per hour (2,881 kilometers per hour).

The V-2 could only hit a general area and was not militarily effective. Germany used it against England, France, The Netherlands and Belgium as a terror weapon. More than 3,200 V-2 rockets were launched against these countries.

At the end of World War II, many V-2 rockets and components were captured by Allied forces and were brought to the United States for research, along with many of the German engineers, scientists and technicians who had worked on the German rocket program. Others were captured by the Soviet army.

Bumper 8 supported by a gantry at Launch Complex 3, Cape Canaveral Air Force Station, Florida. (U.S. Army)

The WAC Corporal was a liquid-fueled hypergolic rocket. After separation from the first stage, the WAC Corporal was capable of reaching more than 80 miles (129 kilometers). It was designed by the Jet Propulsion Laboratory in Pasadena, California, and built by Douglas Aircraft. The rocket carried small research packages into the upper atmosphere. The two-stage rocket was used to develop launch techniques and to refine the separation of upper stages at very high speed.

Now named the Kennedy Space Center, but known simply as “The Cape,” the location was selected to allow rocket testing to take place over the Atlantic Ocean, minimizing danger to persons and property. As one of the points within the United States closest to the Equator, rockets launched on an eastward trajectory receive additional velocity due to the Earth’s rotation.

Launch Pad 3 at Cape Canaveral, circa 1950. A rocket is on the pad surrounded by the gantry structure. (U.S. Air Force)
Launch Complex 3 at Cape Canaveral, 28 July 1950. The Bumper 7 two-stage rocket is on the pad surrounded by a gantry structure. It was launched the day after this photograph was taken. (U.S. Air Force)

© 2016, Bryan R. Swopes

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24 July 1936

Lockheed Electra 10E NR16020 (Lockheed Martin/Purdue University Libraries, Archives and Special Collections)
Lockheed Electra 10E Special NR16020 (Lockheed Martin/Purdue University Libraries, Archives and Special Collections)

24 July 1936: On her 39th birthday, at the Union Air Terminal, Burbank, California, Amelia Earhart accepted delivery of her new Lockheed Electra 10E Special, registered NR16020.

$80,000 to buy the Electra was provided by the Purdue Research Foundation from donations made by several individuals. George Palmer Putnam, Amelia’s husband, made the arrangements to order the airplane and in March 1936 gave Lockheed the authorization to proceed, with delivery requested in June.

Amelia Earhart and her Lockeed Electra.
Amelia Earhart and her Lockeed Electra.

The Electra Model 10 was manufactured by the Lockheed Aircraft Company at Burbank, California. It was an all-metal, twin-engine, low-wing monoplane with retractable landing gear, designed as a small, medium-range airliner. In the standard configuration it carried a crew of 2 and up to 10 passengers. The Model 10 was produced in five variants with a total of 149 airplanes built between August 1934 and July 1941. Lockheed built fifteen Model 10Es. Earhart’s was serial number 1055.

Amelia Earhart in the cocpit of her Lockheed Electra 10E, NR16020.
Amelia Earhart in the cockpit of her Lockheed Electra 10E Special, NR16020. The Sperry GyroPilot is at the center of the instrument panel. (AFP/Getty Images)

Earhart’s Electra was equipped with a Western Electric Model 13C radio transmitter and Model 20B receiver for radio communication. It used a Sperry GyroPilot gyroscopic automatic pilot. Additional modifications included four auxiliary fuel tanks in the passenger compartment, a navigator’s station to the rear of that, elimination of passenger windows, installation of the autopilot, navigation equipment and additional batteries. These modifications varied from the standard airplane enough that it was restricted to carrying only members of required flight crew. This was denoted by the letter “R” in the airplane’s registration.

Amelia Earhart stands behind the additional fuel tanks installed in the aft cabin of her Electra. (AP)
Photographed from the navigator’s station at the rear of the passenger cabin, Amelia Earhart leans over the additional fuel tanks installed in her Electra. (AP)

The Electra was not ready until mid-July. Earhart first flew the new airplane on 21 July with Lockheed test pilot Elmer C. McLeod.

The Electra 10E was 38 feet, 7 inches (11.760 meters) long with a wingspan of 55 feet (16.764 meters) and overall height of 10 feet, 1 inch (3.074 meters). The standard Model 10 had and empty weight of 6,454 pounds (2,927.5 kilograms) and a gross weight of 10,500 pounds (4,762.7 kilograms). NR16020 had an empty weight of 7,265 pounds (3295.4 kilograms). Lockheed’s performance data was calculated using 16,500 pounds (7,484.3 kilograms) as the Maximum Takeoff Weight.

NR16020 had a total fuel capacity of 1,151 gallons (4,357 liters) in ten tanks in the wings and fuselage. 80 gallons (302.8 liters) of lubricating oil for the engines was carried in four tanks.

Amelia Earhart poses with her Electra's Pratt & Whitney Wasp S3H radial engine and two-bladed Hamilton Standard variable-pitch, constant-speed propeller.
Amelia Earhart poses with one of her Electra’s Pratt & Whitney Wasp S3H1 radial engines and two-bladed Hamilton Standard constant-speed propeller. (AP)

Earhart’s Electra 10E Special was powered by two air-cooled, supercharged, 1,343.804-cubic-inch-displacement (22.021 liter) Pratt & Whitney Wasp S3H1 nine-cylinder radial engines, with a compression ratio of 6:1. These engines used a single-stage centrifugal supercharger and were rated at 550 horsepower at 2,200 r.p.m. at 5,000 feet (1,524 meters) and 600 horsepower at 2,250 r.p.m. for take off. The direct-drive engines turned 9 foot, 7/8-inch (3.010 meters) diameter, two-bladed, Hamilton Standard variable-pitch, constant-speed propellers. The Wasp S3H1 is 4 feet, 3.60 inches (1.311 meters) in diameter and 3 feet, 7.01 inches (1.093 meters) long. It weighed 865 pounds (392 kilograms).

The maximum speed for the Model 10E Special at Sea Level and maximum takeoff weight was 177 miles per hour (285 kilometers per hour), a reduction of 25 miles per hour (40 kilometers per hour) over the standard airplane. The maximum range was calculated to be 4,500 miles (7,242 kilometers)

Lockheed test pilot Elmer C. McCleod with a Lockheed Model 10 Electra, "Phantom of the Sky." (Lockheed Martin via dmairfield.com)
Lockheed test pilot Elmer C. McCleod with a Lockheed Model 10 Electra, “Phantom of the Sky.” (Lockheed Martin via dmairfield.com)

© 2017, Bryan R. Swopes

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Amelia Mary Earhart (24 July 1897– )

Amelia Mary Earhart, 1926 (Associated Press)

24 July 1897: Amelia Mary Earhart was born at Atchison, Kansas. She was the older of two daughters of Edwin Stanton Earhart, an attorney, and Amelia Otis Earhart.

Amelia attended Hyde Park School in Chicago, Illinois, graduating in 1916. In 1917, she trained as a nurse’s aide with the Red Cross. While helping victims of the Spanish Flu epidemic, she herself contracted the disease and was hospitalized for approximately two months. In 1919 Earhart entered Columbia University studying medicine, but left after about one year.

Red Cross Nurse’s Aide Amelia Mary Earhart, circa 1917–1918. (Amelia Earhart Papers, Schlesinger Library, Radcliffe Institute, Harvard University)

Amelia first rode in an airplane at Long Beach, California with pilot Frank Monroe Hawks, 28 December 1920. The ten-minute flight began her life long pursuit of aviation. She trained under Mary Anita Snook at Kinner Field near Long Beach, California.

Earhart was the sixteenth woman to become a licensed pilot when she received her certificate from the National Aeronautic Association on behalf of the Fédération Aéronautique Internationale (FAI) on 16 May 1923.

Amelia Earhart’s first pilot’s license. (National Portrait Gallery)

Amelia Earhart became the first woman to cross the Atlantic Ocean by air when she accompanied pilot Wilmer Lower Stultz and mechanic Louis Edward Gordon as a passenger aboard the Fokker F.VIIb/3m, NX4204, Friendship, 17–18 June 1928. The orange and gold, float-equipped, three-engine monoplane had departed from Trepassey Harbor, Newfoundland and Labrador, Canada, and arrived at Burry Port on the southwest coast of Wales, 20 hours, 40 minutes later. (Although Earhart was a pilot with approximately 500 hours of flight experience at this time, she did not serve as one of the pilots on this flight.)

Fokker F.VIIb/3m Friendship at Southampton. (Historic Wings)

On 1 May 1930, the Aeronautics Branch, Department of Commerce, issued Transport Pilot’s License No. 5716 to Amelia Mary Earhart. On 25 June 1930, the newly-licensed commercial pilot set a Fédération Aéronautique Internationale World Record for Speed Over a a Closed Circuit of 100 Kilometers With a 500 Kilogram Payload, averaging 275.90 kilometers per hour (171.44 miles per hour) with her Lockheed Vega.¹ That same day, she set another World Record for Speed Over 100 Kilometers of 281.47 kilometers per hour (174.90 miles per hour).² About two weeks later, Earhart increased her Vega’s speed across a shorter, 3 kilometer course, with an average 291.55 kilometers per hour (181.16 miles per hour).³

Amelia Earhart was a charter member of The Ninety-Nines, Inc., an international organization of licensed women pilots. She served as their first president, 1931–1933.

On 7 February 1931, Miss Earhart married George Palmer Putnam in a civil ceremony at Noank, Connecticut. Judge Arthur P. Anderson presided. In a written prenuptial agreement, Miss Earhart expressed serious misgivings about marrying Mr. Putnam, and wrote, “. . . I shall not hold you to any medieval code of faithfulness to me nor shall I consider myself bound to you similarly.

Amelia Earhart models a women’s flying suit of her own design. (Topical Press Agency/Getty Images)

Earhart had her own line of women’s fashions, made from wrinkle-free fabrics. She modeled for her own advertisements. In November 1931, Earhart was the subject of a series of photographs by Edward Steichen for Vogue, an American fashion magazine.

Amelia Earhart photographed for Vogue Magazine by Edward Steichen, November 1931.

At Warrington, Pennsylvania, 8 April 1931, Amelia Earhart (now, Mrs. George P. Putnam) flew a Pitcairn PCA-2 autogyro to an altitude of 5,613 meters (18,415 feet). Although a sealed barograph was sent to the National Aeronautic Association for certification of a record, NAA does not presently have any documentation that the record was actually homologated.

On the night of 20–21 May 1932, Amelia Earhart flew her Vega 5B from Harbor Grace, Newfoundland, solo and non-stop, across the Atlantic Ocean to Culmore, Northern Ireland. The distance flown was 2,026 miles (3,260.5 kilometers). Her elapsed time was 14 hours, 56 minutes. On 18 July 1932, Earhart was awarded the Distinguished Flying Cross by President Herbert Hoover, for “extraordinary achievement in aviation.”

Amelia Earhart with her red and gold Lockheed Vega 5B, NR7952, at Culmore, North Ireland, after her solo transatlantic flight, 21 May 1932. (National Library of Ireland)

Earhart next flew her Vega non-stop from Los Angeles, California, to New York City, New York, 24–25 August 1932, setting an FAI record for distance without landing of 3,939.25 kilometers (2,447.74 miles).⁴ Her Lockheed Vega 5B, which she called her “little red bus,” is displayed in the Barron Hilton Pioneers of Flight Gallery of the Smithsonian Institution National Air and Space Museum, Washington, D.C.

At 4:40 p.m., local time, 11 January 1935, Amelia Earhart departed Wheeler Field on the island of Oahu, Territory of Hawaii, for Oakland Municipal Airport at Oakland, California, in her Lockheed Vega 5C Special, NR965Y. She arrived 18 hours, 15 minutes later. Earhart was the first person to fly solo from Hawaii to the Mainland.

Amelia Earhart with her Lockheed Vega 5C, NR965Y, at Wheeler Field, 11 January 1935.(Getty Images/Underwood Archives)

Amelia Earhart is best known for her attempt to fly around the world with navigator Frederick J. Noonan in her Lockheed Electra 10E Special, NR16020, in 1937. She disappeared while enroute from Lae, Territory of New Guinea, to Howland Island in the Central Pacific, 2 July 1937. The massive search effort for her and her navigator failed, and what happened to her and Noonan remains a mystery.

Amelia Earhart and her Lockheed Electra Model 10E Special, NR16020.

Although the exact date of her death is not known, Amelia Mary Earhart (Mrs. George Palmer Putnam) was declared dead in absentia by the Superior Court, County of Los Angeles, 5 January 1939. (Probate file 181709)

George Palmer Putnam leaves the Los Angeles Superior Court after missing aviatrix Amelia Earhart was declared dead in absentia, 5 January 1939. (Los Angeles Times Photographic Archive , UCLA Library.)

¹ FAI Record File Number 14993

² FAI Record File Number 14956

³ FAI Record File Number 12326

⁴ FAI Record File Number 12342

© 2017, Bryan R. Swopes

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