falcon!! for the B25h

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AN/APG-13 (Falcon), radar range finder introduced early in 1944. Falcon eliminates guesswork all the way from 5100 down to 300 yards, keeps the gunsight continuously corrected for range.

idk how it works but i leik the b25h n i dont leik flack
theres a good article on it at
http://riemarfamily.com