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You need to research George Cayley who worked out the principles of modern aircraft in the first decades of the 19th Century, and flew heavier than air gliders by mid century. But that should not detract from the real achievements of the Wright Brothers in constructing prototypes of practical heavier than air flying machines. Heavier than air flight by the ...


It is not easy to see any detail of the aircraft but they do look like they could be DH4's which were in US service from 1918-1932, which while a very wide time window is consistent with the vehicles in the picture. Formation of DH4s, 1920s, US National Archives


Looks a bit like a Vultee BT-13 Valiant


Encryption can very well be done on quite small portable devices, also during WWII. The famous German Enigma machine was about as large as a type-writer, and that was one of the most advanced and complex encryption of the time. Smaller machines with simpler encryption also existed. However, encrypted communications required a separate radio person who does ...


I think it's safe to conclude that no fighter plane radios were encrypted, due to requiring extremely bulky computers at the time. Communication between enemy fighters was theoretically possible, since all you need to do is tune in to the enemy's frequency, but most planes could only use a very limited set of preset frequencies. Of course this does mean ...

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