Donald A. Hall
Donald A. Hall
Young Donald A. Hall in 1927 when designing the Spirit of ST. Louis
|Died||2 May 1968 (aged 69)|
|Occupation||American aerospace engineer|
Donald Albert Hall (December 7, 1898 – May 2, 1968) was an American pioneering aeronautical engineer and aircraft designer who is most famous for having designed the Ryan NYP (known commonly as The Spirit of St. Louis) in only sixty days.
He was born in Brooklyn, New York on December 7, 1898. He attended the Manual Training High School in Brooklyn, and graduated from the Pratt Institute with a certificate in Industrial Mechanical Engineering in 1917.
From 1919 to 1921, Donald Hall worked for the Curtiss Aeroplane and Motor Company as a junior draftsman, checker, and then designer. From 1921 to 1922, he was the aerodynamic design and acting chief engineer at Elias & Brothers. He moved to Santa Monica, California in 1924 to work for Douglas Aircraft.
He left Douglas Aircraft in 1926, briefly worked for the airplane division of Ford Motor Company, and then became an aviation cadet in the U.S. Army Air Corps, but did not become a military pilot. He returned to Douglas Aircraft, and joined Ryan Airlines in San Diego in 31 January 1927 as a full-time chief engineer and parts inspector, 3 weeks before Charles Lindbergh visited the company to design the Spirit of St. Louis
The Spirit of St. Louis
Only days later, Ryan Airlines received an inquiry from Robertson Aircraft Corp. of St. Louis asking if they could design and build an aircraft capable of flying nonstop from New York to Paris. Ryan Airlines responded in the affirmative and after all the other potential manufacturers had said no, Charles A. Lindbergh finally traveled to San Diego on 21 February 1927 to inspect the Ryan Airlines facility. There he met Donald Hall for the first time. After touring the facility with the new owner Benjamin Franklin Mahoney, Lindbergh met and discussed the project with Donald A. Hall in his second story office. Lindbergh wanted to decide if the company could really deliver on the proposed aircraft.
Lindbergh later stated in his Pulitzer Prize winning book, The Spirit of St. Louis, that he chosed Ryan Airlines in part because he «believed in Hall's ability». The two men began working closely to design and construct the aircraft in only sixty days, from 28 February 1927 to 28 April 1927 when the first flight tests started.
Upon the request of Charles Lindbergh, Donald Hall intentionally left the wings small to keep the aircraft slightly unstable and keep its aviator awake.
The final aircraft was known as the Ryan NYP (registration number N-X-211) which captured popular imagination as the Spirit of St. Louis in May 1927 by flying nonstop from New York to Paris. Charles A. Lindbergh would become a worldwide celebrity because of this famous flight and aviation would become much more popular around the globe.
Hall left Ryan Airlines in 1929 after the company became Mahoney-Ryan Airlines and later relocated to St. Louis.
From 1929 to 1936, he developed Hall Aeronautical Research and Development Company, and designed and built the Hall X-1. This was a tandem wing design for which Hall held the patent. He closed this company due to financial problems, and joined Consolidated Vultee Aircraft/Convair as an aerodynamics and pre-design engineer. He was involved in the design of the B-24 Liberator bomber. He was discharged by Consolidated (then known as Convair) during the defense cutbacks following World War Two.
In 1952, he became head of the Navy's helicopter division at North Island, San Diego. He worked there in research until 1963.
In 1958, he was part of a team, along with Barry Bernstein and Horace M. Trent, that made the discovery of what causes a bullwhip’s crack. At the time, it was thought to be caused by leather in the tip smacking against other leather as it curled back in on itself. Bernstein, Trent, and Hall proved that it was really the whip exceeding the sound barrier.
Donald Hall died of a heart attack on 2 May 1968 and was survived by his wife and only son. The New York Times and other major newspapers wrote extended obituaries for him once his death was publicly announced.
Years later, his grandson Nova Hall found a trunk in his garage that belonged to his grandfather Donald Hall, and which contained all the documents that were used to design the Spirit of St. Louis.
- 1937-1968: Associate Fellow at the American Institute of Aeronautics and Astronautics (AIAA)
- Technical Preparation of the Spirit of St. Louis - Technical Note #257, National Advisory Committee for Aeronautics (NACA), 1927
- "Donald A. Hall, Sr. Biography Highlights". Charleslindbergh.com. Retrieved 9 July 2018.
- Tom Leech (July 2011). "A Mailplane for Lindbergh". Airspacemag.com. Retrieved 9 July 2018.
- "25 February 1927". Thisdayinaviation.com. 25 February 2018. Retrieved 9 July 2018.
- B. Bernstein, D. A. Hall, and H. M. Trent, "On the Dynamics of a Bull Whip", The Journal of the Acoustical Society of America, vol. 30, no. 12, 1958.
- "Breaking the Sound Barrier". Chicago Tribune. Chicago, Illinois. May 10, 1958. Retrieved April 20, 2017.
- Hall, N. (2002). Spirit & Creator: The Mysterious Man Behind Lindbergh's Flight to Paris. ATN Pub. ISBN 9780970296443. Retrieved 2015-06-20.
- "Donald A. Hall Sr. Biography and Introduction". Flyingovertime.org. Retrieved 9 July 2018.
- Hall, Donald A. Technical Preparation of the Airplane "Spirit of St. Louis" N.A.C.A. Technical Note #257. Washington: National Advisory Committee for Aeronautics, July 1927. Spirit Access date: 2007-05-18.
- Hall, Nova S. Spirit and Creator: The Mysterious Man Behind Lindbergh's Flight to Paris. Sheffield, MA: ATN Publishing, 2002. ISBN 0-9702964-4-4.