<prompt> The TB-3 aiva zvose-metal ndege simbi kuvaka, sezvo mumwe mazano kubva Andrei Tupolev kuti magadzirirwo Bureau kuti kwakavakirwa 1918-mberi zvose-metal ndege magadzirirwo tsika uye zvemichina kupayona kubudikidza Hugo Junkers. The puranga yaisanganisira V-chikamu matanda akafukidzwa non-vakatsungirira corrugated ganda kubvira 0.3 mm 164 mu kuti 0.8 mm 132 mu pakukora. The corrugations vaiva 13 mm 0.51 mu uye yakadzika 50 mm 1.97 mu kure. The canvertile bapiro akanga akatsigira mana chubhu-chikamu spars. muna 1934, nemhaka kukura simba simbi alloys, ari mapapiro yakawedzerwa kubva 39.5 kusvika 41.5 metres 129.856 kusvika 137.3 ft pamwe chete chikuru bapiro nharaunda yakawedzera kubva 234.5 kuti 234.5 m2 2,476 kuti 2,56 ft ari piyona Hugo Junkers. The puranga yaisanganisira V-chikamu matanda akafukidzwa non-vakatsungirira corrugated ganda ranging kubva 0.3 mm 164 mu kusvika 0.8 mm 1  <response>: imwe 