Simplex recently certified a 3,050 gallon Fire Attack System for the CH-47D Chinook helicopter. The Model 347 is the world’s larges helicopter firefighting system in the world.
The Model 347 is comprised of a 3,050-gallon internal tank with a 2,800-gallon water reservoir, approximately 110 gallons of water through the hookwell and 140-gallon foam concentrate reservoir that can be loaded from the helicopter’s rear loading ramp. The system also includes a 12-foot-long, 10-inch diameter hover pump, capable of refilling the tank in less than one minute.
The system includes ground fill ports so the tank can be pre-filled and ready to go at a moment’s notice. The entire contents of the FAS can be dropped in less than four seconds.
The Simplex Model 347 has the capability for the pilot to select drop patterns ranging from a single drop to multiple drops depending on the demands of the mission. An automatic emergency water drop feature is included on all Simplex Fire Attack systems in the event of an aircraft power outage.
This new Simplex FAS can be installed on the helicopter using only four bolts. Only minor modifications are required to provision for FAS installation.
The gravity-fed Fire Attack tank is installed in the aircraft cabin; then connected to a sleeve, which extends through the aircraft hookwell, joining an external plenum in the belly. Vne (never exceed speed) for the Simplex 347 FAS is 140 knots, with or without the hover pump installed.
Water drops can be made at up to 100 knots. Newly developed pilot control and display allow for U.S. Forest Service Type-one compliance. The pilot controls can be configured to show water volume, and ground refilling volume displaying gallons (or weight) on both the flight deck and ground fill input location.
Read the full story on Vertical.com to learn more about the features of this state of the art system.