Science and technology, Yandex Zen (link)
26-May-2024 Sunday
"Atypical" longitudinal helicopter Filper Research Beta 200A
21-May-2024 Tuesday
Sikorsky flying laboratories: S-61A "Rotorprop" and S-61F "Compound"
17-May-2024 Friday
"Flying Saucer" VZ-9 Avrocar