Does anyone know a link to, or how to access, or who to ask for old (1930's) US Department of Commerce engine tests? Failed or otherwise?
Looking for a possible test of the Aviation Diesel Company Ltd diesel in or around November 1931..... but will bound to be looking for others later .....
I...
Two reference books authored by Paul H. Wilkinson, containing data of numerous aircraft gasoline and diesel engines. The book about diesels is a russian translation of the guide.