The Dennis-Mercury 20 ton Aircraft Tractor is capable of towing aircraft up to about 60 ton weight. Its maximum speed is 10 mph, 5mph when towing. It has a semi-automatic 3-speed forward and reverse gearbox.
It is believed that the Museum’s aircraft tractor served with the RAF for many years before it was acquired by Nordic Air at Leeds Bradford Airport. Later, it passed into the ownership of Servisair. When its working life was over it was in outside storage for three years before being donated to the Museum by Servisair in November 2002. It has been restored to operational condition and repainted by the Museum’s volunteers.