Kawasaki BK117 Fire Attack System
Simplex Model 311
The Simplex Aerospace Model 311 Fire Attack aerial firefighting helicopter belly tank system for the MBB BK117.
The system consists of a carbon fiberglass belly tank with a water capacity of 1,102 liters (291 gallons) and foam retardant capacity of 167 liters (44 gallons). Other features include a hover refill pump and motor with a refill rate of 1,211 liters (320 gallons) per minute, pilot friendly cockpit controls, selectable drop pattern, internal foam injection system, and rapid installation and removal.