Each transition between modes executes through coordinated valve sequencing managed by the control system. Motorized valves require 5-15 seconds to complete travel between positions; the control logic implements appropriate delays between commands to ensure valves reach final position before flow conditions change significantly. The pump itself starts reliably within 2-4 seconds (single crank in warm conditions, occasionally two cranks in cold start), with oil pressure sensor confirmation of successful start within 5 seconds.
The ARMAC physical infrastructure seeks to combine effectiveness and water conservation, and the benefits of manual control and autonomous operation. Through integration of standoff impact sprinklers, intelligent valve control, comprehensive sensor coverage, and protective measures for critical equipment, the system aims to provide flexible response to evolving threat conditions while maintaining extended operational duration. The design decisions—copper piping over plastic for above-ground runs, diesel pump over electric for grid-independent operation, distributed sprinklers over roof-mounted spray heads, proportional gel injection over crude mixing— are all designed to create realistic defence options in the face of bushfire threats.
The approximately $31,000 AUD total implementation cost, while substantial for a residential DIY project, compares favorably to commercial fixed-spray installations often exceeding $60,000 while delivering comparable and perhaps superior protection with significantly longer operational duration. The 18-month design and construction timeline reflects the iterative testing and refinement required to optimize sprinkler positions, validate hydraulic calculations, and prove component reliability under simulated fire conditions.
Without reliable water delivery, precise flow control, accurate sensing, and thermally protected electronics, even the most sophisticated autonomous algorithms would prove ineffective. However, that physical capability would remain largely manual and reactive without some capacity for preemptive response, adaptive operation, and graceful degradation as conditions evolve. The design of the ARMAC electronic control systems that are designed ito create this capability follow next.
<< | | >> |Table of Contents>