Step 4Robot Back
The cargo bay holds the 12V reversible water pump, 4 AA batteries for servo power, and the 12V lead acid battery.
The orignal backside bumper on the Create was relocated to the second level deck for easy access to the cargo bay. Without this bumper on the cargo bay area the weight on the 4th wheel would flex the plastic housing. An aluminum sheet was attached to the floor of the cargo bay for extra reinforcements.
The reversible water pump in the cargo bay is adapted from the RC model industry. These pumps are commonly used to fill and extract fuel from the tanks of model airplanes.
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