1929--First cross-country flights accomplished.
1930--Packard diesels were sold on the commercial market and were used to power airplanes manufactured by a dozen different American companies.
1931--World's official duration record for nonrefueled heavier-than-air flight. First flight across the Atlantic by a diesel-powered airplane.
1932--Packard diesels tested successfully in the Goodyear nonrigid airship _Defender_.[9] Official American altitude record for diesel-powered airplanes established (this record still stands).
In spite of this promising record, the project died in 1933. The December 1950 issue of _Pegasus_ gave two reasons for the failure of the engine: "One blow had already been dealt the program through the accidental death of Capt. L. M. Woolson, Packard's chief engineer in charge of the Diesel development, on April 23, 1930. Then the Big Depression took its toll in research work everywhere and Packard was not excepted."
[Illustration: Figure 14.--Walter E. Lees, Packard chief test pilot (in cabin) and Frederic A. Brossy, Packard test pilot, before taking off on their world's record, nonrefueling, heavier-than-air aircraft duration flight, which lasted 84 hours, 33 minutes, and 1-1/4 seconds. (Smithsonian photo A48446E.)]
[Illustration: Figure 15.--Walter E. Lees, official timer, and Ray Collins, manager, 1930 National Air Tour, with their official airplane, a Packard diesel Waco "Taper Wing," at Packard proving grounds near Detroit. (Smithsonian photo A49449.)]
[Illustration: Figure 16.--Capt. Karl Fickes, acting head of Goodyear's airship operations, pointing out features on one of the "Defender's" Packard diesel engines to Roland J. Blair, Goodyear airship pilot, Akron, Ohio. From "Aero Digest," February 1932. (Smithsonian photo A49674.)]
The engine did not fail for the above mentioned reasons. Capt. Woolson's death was indeed unfortunate, but there were others connected with the project who carried on his work for three years after he passed away. The big depression was also unfortunate, but it did not stop aeronautical engine development. "It was a time when such an engine would have been most welcome if it had been produced in large enough numbers to bring the price down to compare favorably pricewise with gas engines of the same horsepower class."[10] The Packard diesel failed because it was not a good engine. It was an ingenious engine, and two of the several features it pioneered (the use of magnesium and of a dynamically balanced crankshaft) survive in modern reciprocating engine designs. In addition, when it was first introduced, no other engine could match it for economical fuel consumption and fuel safety. It also had other less important advantages, but its disadvantages outweighed all these advantages, as will be seen.