Section 3: Using Accessories
Using PowerFill
2016 Bambi MAX Service Manual
–
Models 4453-7590
(Version D)
11
We Engineer Solutions
Section 3: Using Accessories
Using PowerFill
Overview
The PowerFill system is comprised of two electrically driven pumps which have a combined output of
900gpm (56 L/s). The system allows a helicopter to get partial or complete fills from a range of previously
inaccessible shallow water sources including streams, canals, ponds and low profile dip tanks. The pumps
can fill the bucket from water sources as shallow as 18" (46cm). The system can be supplied as original
equipment or can be added to an existing Bambi MAX bucket. Installation instructions are supplied with
the kit when it is shipped.
System Description
The PowerFill MAX system is mounted to the Bambi MAX
valve. The blanking plates in the top plate of the valve are
removed and two screens are installed onto the lower side of
the valve plate. The pump assemblies and motors are then
attached to the screens on the top of the valve plate. When
the bucket is immersed in water to the level of the top plate
of the valve, the pumps will draw water through the screens
and discharge into the bucket through one way flapper
valves.
The pump motors are controlled by solid state relays in a
watertight control enclosure located between the two motors.
The controller includes a time delay circuit to stagger the
starting of the motors to reduce the transient current load on
the aircraft power supply. Power is transmitted to the pump
controller via two heavy gauge electrical cables. A separate
control cable supplies the signal to start the pumps. Quick
disconnect plugs are fitted at the top end of the cables to
allow the cables to separate with minimal force in the event
of a load jettison.
On the bottom of the bucket, a standoff structure is installed
to provide an intake area that keeps the pumps clear of any
rocks and debris in the water source. The pump is fully
waterproof in operation to a depth of 10 ft. (3m).
Screens
Flapper Valves
