Operation Crossbow

In 1943, Nazi Germany is developing the V-1 flying bomb and V-2 rockets. Technical issues with the V-1 lead the Germans to create a crewed version for investigation, but the test pilots die flying it. Eventually, aviator Hanna Reitsch (Barbara Rütting) successfully flies the prototype, discovering that mechanical shifting of the missile's weight and change of speed determines the solution to the problem, and the trim controls require changing.