Counter-Unmanned Aerial Systems (C-UAS) is one of the fastest moving capability areas in modern defence. Threat platforms iterate weekly, and defensive payloads have to evolve at the same tempo. The development cycle leaves no comfortable space for the words 'production tooling' until a design is genuinely stable, which on most programmes is a long way past the first build.
This post walks through a representative C-UAS payload engagement: a Perth integrator chasing a vehicle mounted detection and effector pod, with three physical revisions planned before a fielded baseline. The details are composited from several real programmes but the manufacturing pattern is true to type.
The challenge
The integrator had been quoted a sixteen week tooling lead for the pod enclosure, against an operational deadline measured in weeks. Field reports were already driving sensor swaps that would have invalidated any committed tooling. The antenna array inside the pod needed an RF transparent housing while the jammer module beside it needed deliberate EMI shielding, all inside one printed assembly.
Volumes added to the bind. Hundreds of units, not thousands, so injection moulding never paid back. Yet the parts were complex enough that hand built composite shells would have absorbed every spare engineering hour for a quarter, and still arrived late.
Our approach
We architected the pod as three sub assemblies: an ASA radome for UV durability and RF transparency, a PA-GF inner chassis for mounting stiffness, and a PETG-CF lower shell tuned for impact and a low part count. Material selection drove the manufacturing plan, not the other way around. The team specified OzFDM engineering filaments throughout so batch records were defensible at audit.
Print cells in Perth ran nightly revisions while CAD continued to evolve through the day. Each new build went straight into vehicle fit checks the following morning, with field feedback feeding back into the next revision by mid afternoon. The whole loop sat inside our FDM printing cell.
- Antenna radomes printed in unfilled ASA for RF transparency
- Jammer cases shielded with conductive paint to a defined band
- Sensor housings in PA-GF for impact and dimensional stability
- Net launcher carriage in PETG-CF for low part count
- Vehicle mount pods in ASA for UV and outdoor service life
The outcome
Three physical revisions completed in seven calendar weeks, including two days of field rehearsals and a round of EMI compliance work. The pod entered limited production printed directly from the qualified files, with finish CNC machining on the vehicle interface to bring datum surfaces inside tolerance for the bolted mount.
The lesson is not that additive replaces tooling forever. It is that additive lets the engineering decide when a design is actually stable, rather than committing tooling at week one and discovering at week ten that the threat has changed.
Further references