Basse und Selve (BuS) were German manufacturers of engines for automobiles, motorcycles, boats, aircraft and railcars, supplying engines for Selve cars built at the Selve Automobilwerke AG, but also various other manufacturers of automobiles and commercial vehicles, such as Beckmann, Mannesmann, and Heim.
Basse und Selve aero-engines did not make a big impact on the aviation industry in Germany, but did find limited use, particularly in several large aircraft.
The largest and most powerful fighter fitted with a Basse & Selve engine was the Hansa-Brandenburg W.34, a single prototype of which was completed before hostilities ceased in 1918.
Several large Riesenflugzeuge were also fitted with Basse & Selve engines, but they were generally replaced with Mercedes or Maybach alternatives as soon as possible.
Basse und Selve is known to have produced the following engines for aircraft and/or airships: