3911 is Roberts-Warren Fire Dept's backup pumper engine. This truck is only rolled on fires as a backup pumper and transport vehicle. 3911 is a 1971 Seagrave chassis with a General engine. Like 3910 3911 can pump 1250 gallons per minute and sports a 500 gallon water reserve in case of emergencies. Look for this engine to be replaced in the short coming years.