The big depression was also unfortunate, but it did not stop aeronautical engine development.
"The First Airplane Diesel Engine: Packard Model DR-980 of 1928"
Robert B. Meyer
Most of them were only familiar with the aeronautical diesel as a design project and therefore did not have the practical experience necessary to understand all of its limitations.
"The First Airplane Diesel Engine: Packard Model DR-980 of 1928"
Robert B. Meyer
L. M. Woolson, chief aeronautical engineer of the Packard Motor Car Co.
"The First Airplane Diesel Engine: Packard Model DR-980 of 1928"
Robert B. Meyer