A Riesenflugzeug (plural Riesenflugzeuge, German for "giant aircraft"), sometimes colloquially referred to in English as an R-plane, was a large World War I German bomber, possessing at least three aircraft engines, more usually being powered by four or more engines, sometimes of more than one make, model or power level. These were large multi-engine aircraft capable of flying several hours with larger bomb loads than the smaller Grossflugzeug bombers such as the Gotha G.V.