BT-13 Valiant Plaques and Seals McDonnell Douglas - NASA "ACTIVE"

McDonnell Douglas - NASA "ACTIVE" test aircraft

it served to assess the application of novel materials like titanium and innovative construction methods

and hydraulic split flaps

Recognizing a market for a high capacity 'jumbo jet

A folding-wing version flew in April 1941 and entered service in early 1942 as the F4F-4

BT-13 Valiant Plaques and Seals McDonnell Douglas - NASA "ACTIVE"Vultee BT 13 Valiant airplane model. The BT 13 Valiant was a World War II era basic trainer aircraft built by Vultee Aircraft for the United States Army Air Corps. The Vultee BT 13 was the basic trainer flow by most pilots during WWII. It was the second phase of the three phase training program for pilots. After primary training, the student pilot moved to the more complex Vultee. The BT 13 had a more powerful engine and was faster and heavier than