In 1911 Daimler had plans to create The Premier Motor Omnibus Company (running Daimler buses) and appoint Frank Searle (ex London General Omnibus Company) as the managing director. However plans had to be scrapped at the last moment, and instead the Daimler managing director, Percy Martin, created the Daimler commercial division, with Frank Searle as its head.[67] Daimler had been involved with various commercial vehicle designs for some time, and this brought vans, trucks, buses, tractors and railcars under the same division head. All vehicles used the Daimler sleeve-valve petrol engines, many using the 105 hp[note 1] 15.9 L sleeve-valve straight-six engine.