Alvan Macauley and group of men watching dynamometer test of Packard 905 engine
Grab
Description
View of Alvan Macauley and group of men watching dynamometer testing of Packard 905 aircraft engine. Handwritten on back: "Neg. no. 23A. Date: 12-28-16. Main guide: Mr. Macauley with group. Remarks: Dyn test of engine 905. Liberty motor design based on this Packard-developed airplane motor."