It gives me great pleasure on behalf of the National Aeronautical Association to present to you, as the representative of the Packard Motor Car Company, the Collier Trophy for the development of the Packard Diesel aircraft engine. As you know, I am naturally greatly interested in every important mechanical development. The adaptation of the Diesel principle to aircraft engines is a contribution not only to economy but to safety in aviation. It is a notable mechanical achievement and one which is worthy of the fine air work to which the Packard Company has contributed so much in the past. This trophy is the highest award in American aeronautics, and I congratulate you upon it.
Note: The President presented the trophy to Alvan Macauley, president of the Packard Motor Car Company, in ceremonies held in the White House at 12:45 p.m. The National Aeronautic Association awarded the trophy annually for the greatest achievement in American aviation.
Herbert Hoover, Remarks on the Presentation of the Collier Trophy to the Packard Motor Car Company Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/207547