Real WWII Period Aircraft featured in this film include a Boeing B-17 Flying Fortress bomber, North American P-51 Mustang fighters, Supermarine Spitfire fighter, Hawker Hurricane fighter, North American B-25 Mitchell bomber, and Messerschmitt Bf 109 (ME 109) fighter.
The filmmakers used all real, authentic WWII Aircraft, both in aerial/dogfighting sequences and on the ground, not a single computer generated (CG) plane is in the movie. For Aircraft destruction/explosion shots, detailed scale models where filmed and then further enhanced with Visual Effects, but no shot is 100% computer generated.
To film the skydiving sequences, Luke Aikins had an Arri Alexa Mini Camera mounted to his helmet, with Atlas Orion Anamorphic lenses or Zeiss Standard Speed spherical lenses depending on the shot.
Filmed in 42 shooting days.
After 2 weeks of prep, Skydiving Coordinator/Camera Operator Luke Aikins and Skydiving Double Andy Farrington performed a total of 14 jumps with customized parachute rigs in 2 shooting days for the film.