The Air Corps Technical School was a hands on school. They did their course work in the different shops but also spent time out on the field as these photos indicate:
I believe the following photos were taken at Chanute Field, these planes look a lot like the ones featured above and are probably the same aircraft from different views.
As Keith was learning his craft of airplane mechanics events in Europe and the Pacific were gearing up for World War II. On the right side of this blog is a time line of events which you can review at the link below. This is not the only timeline for WWII. Some timelines feature events taking place in Europe but remember the Japanese were on the move in the Pacific as well. Meanwhile, the aircraft industry and the military service were going through a lot of change during the 1930’s leading up to the 1940’s.