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Wildfire Equipment Research & Development


Roscommon Equipment Center


Wildland Engine Design


Safe, reliable, and efficient should be guiding words to those developing wildland fire engines. Connected to this page are many resources for those who plan to add a water tank to a cab and chassis. It can also be used if you are adding a slip-on tank to a pickup truck. These pages have been developed to help rural fire departments who often use Federal Excess Personal Property (FEPP) and Fire Fighter Property (FFP) programs obtain military chassis to make a fire unit. We hope it will help others equally as well.



Guidelines for Designing Wildland Fire Engines is a primer for those planning to fabricate a fire truck.  It includes basic design needs, legal and safety requirements, and a list of other resources.


Slip-On Water Tank Units discusses topics important to selecting and installing a slip-on tank on a pickup truck.  The contents include material selection, securing the tank unit to the vehicle, and proper loading of the tank.  There is a listing of other useful publications, designs, and tank retailers within the report.  


Federal Excess Personal Property (FEPP) & Fire Fire Property (FFP) is a clearinghouse for posting specific safety information concerning the conversion of U.S. Military vehicles to fire equipment.  




CALCULATORS


BASIC CALCULATOR for Truck Chassis Greater than 14,000 GVWR can be used to get a first guess estimate, which can be especially helpful when choosing a truck chassis.  It compares the Gross Vehicle Weight Rating (GVWR) of a given truck to the pre-modification or bare chassis weight of the vehicle.  This calculator provides an estimated water capacity range for the truck.


BASIC CALCULATOR for Pickup Truck Slip-On Units is tuned to get a first guess estimate of how much water volume can be placed on a pickup class vehicle.  It compares the Gross Vehicle Weight Rating (GVWR) of a given truck to the pre-modification or bare chassis weight of the vehicle.  Be careful to use the true delivery weight of the pickup truck.  Often the user has the base unit weight which can be considerably less than the actual weight with options included.


DETAILED CALCULATOR for Truck Chassis Greater than 14,000 GVWR provides a more refined estimate, but requires the input of more information.  It can be used during the design process to help determine the placement of components on the engine and to determine tank size.  For this calculator, the user must enter the weight and location of the components to be added to the truck.  An estimated finished weight is provided with a brief analysis of the viability of the load.  Be careful using any of these calculators.  They are only as good as the information entered into them.  Always double check the inputs for correctness.


DETAILED CALCULATOR for Slip-On Engine Weight provides a simplified version of the "Detailed Calculator for Truck Chassis Greater than 14,000 GVWR” which is designed specifically for those installing a slip-on tank into a pickup truck cargo box.  It also can be used during the design process to help determine the placement of components on the engine and to determine tank size.  For this calculator, the user must enter the weight and location of the components to be added to the truck.  An estimated finished weight is provided with a brief analysis of the viability of the load. Be careful using any of these calculators. They are only as good as the information put into them.  Always double check the inputs for correctness.




Have Questions About Engine Design?  


We reserve some of our time for one-on-one technical service.  Our engineering staff helps answer questions from rural fire departments, state, and federal wildfire agencies concerning wildfire engine design or equipment.   


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