DOCUMENT / CAPABILITY STATEMENT
Capability statement.
Issue 01 / Q2 2026. The working document for evaluators, integrators, and partners.
CAP-STMT / ISSUE 01 / FLATLINE DYNAMICS
LAST UPDATED / Q2 2026
STATUS / PUBLIC
At a glance.
IDENTITY
UK-based engineering lab. Founded 2024. Active R&D. Two programmes in prototype, one open.
DOCTRINE
Repair-forward. Governed claims. Documentation as deliverable. Constraint-first design.
CURRENT PROGRAMMES
Keystone 25 / modular carry platform / REV A03 Sentinel HMD-1 / head-mounted compute and HUD / REV B01 Program 03 / open for collaboration
ENGAGEMENT
Conversational. Four channels: technical, partnership, press, general. Evaluation cohorts open as programmes mature.
POSTURE
UK-based. UK-designed and prototyped. Working toward Cyber Essentials Plus, JOSCAR, ISO 9001. Posture published openly, updated quarterly.
AUDIENCE
UKDI Innovation Partners and Dstl evaluators. Prime contractor engineering and innovation teams. Specialist operators and procurement leads. Expedition, SAR, and industrial users.
About the lab.
Flatline Dynamics is a UK engineering lab applying repair-forward, documentation-led design to field-grade hardware. The lab was founded in 2024 by an aerospace and maritime engineer with a Bristol background and a long-standing involvement in gliding, diving, hiking, and field-discipline work. Disciplines where small components fail in cold, low-pressure, vibration-heavy environments, and where repair happens in the field with limited tools.
The lab exists to apply that engineering culture to a class of hardware that's normally built for it but doesn't quite act like it. Modular load-out systems where fastener counts are too high, spares chains are proprietary, repair classes are undefined, and documentation is an afterthought. Flatline's bet is that an operator with one tool should be able to service every part on every Flatline module, and that the documentation explaining how is part of the deliverable, not an artefact of the deliverable.
The named bio of the founder is held back deliberately. The work is meant to be evaluated on the work. Identity follows once the programmes are at a stage to carry the introduction.
“The discipline is the product. The hardware is how we demonstrate it.”
Doctrine.
Four principles. Every programme answers to all of them.
REPAIR-FORWARD
Failures are designed for, not designed around. Every fastener on a Flatline module is replaceable in the field with one tool. Every wear part has a documented spare and a documented procedure. Spares specifications are published, not proprietary.
A Flatline module that fails at hour 96 in cold weather should be back in service before hour 100, with parts the user already carries.
GOVERNED CLAIMS
The lab publishes only what it can demonstrate. Specifications reflect what is measured at current revision, not what is targeted for the next revision. Roadmap items are labelled as such.
A buyer evaluating a Flatline programme can assume the published spec is the floor, not the ceiling.
DOCUMENTATION AS DELIVERABLE
Documentation ships alongside hardware as a first-class artefact. Service manuals, decision logs, spares specifications, and design rationale are produced in parallel with engineering, not after it.
An integrator handed a Flatline module receives the same documentation depth that the lab itself uses to service it.
CONSTRAINT-FIRST DESIGN
Every design decision starts from the operating envelope: temperature, vibration, abrasion, time to repair, available tools. Features are added only if the constraints permit them. The lab's preference is fewer parts, fewer tools, fewer modes.
Flatline programmes tend to look spare. The intent is that nothing on the module is there because it could be, only because it must be.
Current programmes.
Two programmes in active prototype, one open.
KEYSTONE 25
PROBLEM
Modular carry platforms in the 20-30L class are typically built around proprietary hardware systems, layered access patterns that resist field repair, and spares chains tied to single manufacturers. Field-level service is treated as out of scope.
APPROACH
Keystone 25 applies repair-forward hardware discipline. Open-spec buckles, sliders, and cord-locks throughout. 25mm UK MIL-spec webbing primary. Large-gauge standard YKK zips with full storm flaps. Full clamshell access for service. Compression and modular attachment systems are open-spec.
KEY DECISIONS
Clamshell-vs-panel-loading was an early decision (documented in lab notes). Hardware brand evaluation ongoing between ITW Nexus and Duraflex. Storm-flapped standard zips chosen over Aquaguard for field replaceability under abrasion.
NEXT MILESTONES
REV A04 targets weight reduction through panel material change and hardware consolidation, plus a cold-weather field trial cohort for operating envelope validation.
SENTINEL HMD-1
PROBLEM
Head-mounted display systems for dismounted operators have historically required multiple cables, tethered power, and integration with vendor-specific helmet platforms. Cable management under NVGs is operationally hostile.
APPROACH
Sentinel HMD-1 consolidates power and data into a single USB-C tether to a backpack-worn battery and Pi 5 (8GB) compute. Amber monochrome HUD, optimised for dark adaptation. Sensor pack integrates IR illuminators, searchlight, fans, headset and mic, VOC and eCO2 monitoring, GPS, compass, and LoRa. ATAK telemetry via Android gateway.
KEY DECISIONS
Single-cable USB-C decision is documented in lab notes. Compute-on-pack rather than compute-on-head was a constraint-first decision: weight on head is a hard ceiling. Amber monochrome over colour: dark adaptation over colour fidelity.
NEXT MILESTONES
REV B02 targets power budget optimisation across the sensor pack and validation of the integrated comms stack under representative load.
PROGRAM 03
The third programme is deliberately undefined. The lab has slot capacity for one additional programme but has not committed to a problem space. We are listening for problems worth working on. Load-out systems, field-repairable hardware, things that fail in conditions they shouldn't. Conversations welcome through the PARTNERSHIP channel.
OPEN A CHANNELEngagement model.
Engagement is conversational at this stage. No general-availability product catalogue, no off-the-shelf evaluation programme. Registering interest opens a channel.
Evaluation cohorts open per programme as revisions reach appropriate maturity. Cohorts are limited in size, governed by NDA, and require a written feedback report as part of participation. Registering interest through the TECHNICAL channel puts a prospective evaluator on the waiting list.
Compliance posture.
Published openly. Updated quarterly.
◯◯◯ planned ●◯◯ in progress ●●◯ partial ●●● in place
Specific documentation available on request through the PARTNERSHIP channel. Posture last updated Q2 2026.
This document is reissued as programmes mature. The most current version is always available at flatlinedynamics.com/capability-statement.
Different readers come to this document with different questions.