Mar 8, 2025 #1 Baball Airman 1st Class 177 593 Joined Dec 26, 2018 Location France Here's the manual for the pneumatic mail system used on the Tupolev TB-3, dated 1934, that I've foundon airforce.ru . I never knew there was such a system ever used on an airplane. Enjoy! Attachments Пневмопочта ТБ-3.pdf Пневмопочта ТБ-3.pdf 3 MB · Views: 121
Here's the manual for the pneumatic mail system used on the Tupolev TB-3, dated 1934, that I've foundon airforce.ru . I never knew there was such a system ever used on an airplane. Enjoy!
Mar 14, 2025 #2 PETERTHEEATER Airman 42 36 Joined Dec 22, 2006 Location Oxfordshire, UK That's different! What was the purpose. To pass written messages between crewmember stations?
