A new B-17F Flying Fortress bomber warms up its engines at Boeing factory in Seattle as it prepares for a flight test. (Library of Congress Photograph.)

B-17 Engine Warmup

July 28, 2016

by Lone_Sentry_Admin

1 min read

A new B-17F Flying Fortress bomber warms up its engines at Boeing’s factory in Seattle as it prepares for a flight test. (Library of Congress Photograph.)

A new B-17F Flying Fortress bomber warms up its engines at Boeing factory in Seattle as it prepares for a flight test. (Library of Congress Photograph.) — B-17F Flying Fortress (Library of Congress Photograph.)

Boeing B-17G Flying Fortress of the 92nd Bomb Group at RAF Podington. (U.S. Air Force Photograph.)

B-17G of 92nd BG

The P-40 Warhawk (Red Ball) on display at NACA during World War II. (NASA Photograph.)

P-40 Warhawk “Red Ball”

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