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FlatlineDynamics
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ABOUT THE LAB

A founder-led hardware lab in Bristol. Field equipment you can repair where you use it.

FLATLINEON PURPOSE

It’s an instrumentation term. A flat response means the same output every time, whatever the input. That’s the standard the lab builds to, and it’s why it’s called what it’s called.

Flatline Dynamics is a founder-led hardware lab in Bristol. It designs, builds and tests field equipment end to end: carry systems, head-worn systems, the electronics and firmware inside them, and the documentation you get with them.

If you work a long way from help, this is built for you. Mountain and expedition teams, marine and offshore crews, search and rescue, field research, survey and inspection work, defence. Different jobs, one shared problem: when something breaks out there, you fix it yourself or you go without.

WHO BUILDS ITONE ENGINEER

Every drawing has the same initials in both boxes.

I have a degree in aerospace engineering and I’ve spent my career in maritime engineering. Two fields where a part that fails doesn’t get a second chance, and where you’re expected to show your working.

Away from work I dive, fly gliders and spend time in the hills. All three teach the same lesson from different angles. A regulator seizes if you don’t service it. A glider has no engine to fall back on when the air stops working. The weather in the hills doesn’t care what the forecast said. Kit either holds up when it’s cold, wet and late, or it lets you down at the worst possible moment.

I build the first kind, and you get it documented in full and honest about what it actually does.

THE RULESWRITTEN DOWN

Four rules, written down before the first part was cut.

Every programme is built to these, whatever it is and whenever it starts. They only matter on the days they cost something, and they do: when a published target is missed, the correction and the reason go on the lab page and stay there.

Where classification allows, a programme is published in full, so you can modify and repair it yourself. Where it doesn’t, the documentation still ships with the product and the limit is stated.

Programme data is held on encrypted, access-controlled systems with multi-factor authentication and current patching, and export control classification is assessed before anything is published or shared.

If you can’t fix it in the field with the tools already in your pack, it isn’t finished.
No number goes out unless it has been measured. Targets are labelled as targets, and when a target is missed it gets published.
Full drawings and repair documentation are supplied with the product, and published openly wherever classification allows.
Weight, size and signature are designed in first, never bolted on at the end.

SO FARAND NEXT

One line runs through what the lab has built and where it is headed. Solid over the ground it has covered, dashed where it is still just a bearing.

One line, solid from the lab's founding in 2024 through Keystone 25 and Sentinel HMD-1 to now, then splitting into three plotted bearings that run off the edge.2024LAB STARTED2025KEYSTONE 252026SENTINEL HMD-1NOWIN SERVICETESTEDMADE HERE
One line, solid from the lab's founding in 2024 through Keystone 25 and Sentinel HMD-1 to now, then splitting into three plotted bearings that run off the edge.2024LAB STARTED2025KEYSTONE 252026SENTINEL HMD-1NOWOne line, solid from the lab's founding in 2024 through Keystone 25 and Sentinel HMD-1 to now, then splitting into three plotted bearings that run off the edge.NOWIN SERVICETESTEDMADE HERE
2024Lab started

Founder-led in Bristol, on one bench, with the four rules written down before the first part was cut.

2025Keystone 25, first programme starts

The first programme: a modular carry system, built to the rules and documented in the open as it goes.

2026Sentinel HMD-1, second programme, now on test

The second programme, on test now: an integrated helmet system, its drawings public before it ships.

01First units in the field

Keystone 25 out of prototype and into hard use, with what comes back published, breakages included.

02Numbers signed off by someone else

Independent environmental and load testing to recognised standards, so the figures aren’t only ours.

03UK production, in batches

A UK route to small-batch manufacture that meets real orders without moving the chain offshore.

DEPARTURESALL POINTS

That’s the lab. Systems, notes and contact are all one click away, and a message to Contact reaches an engineer, not a sales desk.