Junkers Ju-52

Warning Spoilers through Devil's Due. The Junkers JU-52 is a corrugated hull tri-motor German aircraft, see https://en.wikipedia.org/wiki/Junkers_Ju_52.

First seen in Straits of Hell delivering the representatives of the League of Tripoli to Zanzibar.

In Blood in the Water Oberleutnant Walbert Fiedler flies Capitine de Fregate Victor Gravois to Grik City.

In Devil's Due the Ju 52 is turned over to the alliance Fiedler tunes it up and hides notes to the alliance there. The alliance uses the Transport to move supplies to central Madagascar.