How to Prepare a Spec for Contract FPV Assembly

Specification completeness determines the reference sample timeline and quote accuracy. The fewer ambiguities in the spec, the fewer back-and-forth rounds between the client and the line.

An incomplete spec means additional questions, clarifications, approvals. Each round adds 1-3 business days before start. A complete spec per our checklist lets us begin with the reference sample immediately.

1. Purpose and use scenario. General task class - helps the line understand assembly priorities.
2. Frame: type, size, material. Without this, tooling and assembly time cannot be planned.
3. Propulsion: motors, propellers, configuration. Models, mount specs, rotation direction.
4. Stack: flight controller, ESC, firmware version. Specific models and versions - not "any F7 FC".
5. Video system: camera, VTX, power, bands. Connector type, antenna, channel settings.
6. Control link: protocol, receiver, failsafe logic. ELRS/Crossfire, receiver model, lost-link behavior.
7. Power: battery type & capacity, connector, mount. Connector standard, battery fixation, voltage range.
8. Payload: mass, dimensions, mount points, balancing. Without mass and mount specifics the line cannot build a balanced unit.
9. Software settings: tune, modes, safety parameters. Config file or parameter list for firmware.
10. Testing: flight test scope, batch acceptance criteria. Parameters to check, thresholds, report format.
11. Packaging, labeling, handover logistics. Unit marking, packaging requirements, delivery method.
12. Components: client-supplied / procurement, allowed alternatives. Which items the client supplies, which we procure, whether substitutions are allowed.

We work with both models. The client can supply all components (client-supplied), delegate procurement to us via Cost+, or combine: critical items - yours, the rest - ours.

Either way, every batch goes through incoming inspection before reaching the line.

We sign an NDA first, then receive the specification. Workstations handling client designs are isolated from other projects. We have no own drone models and do not compete with our clients.

After receiving a complete spec we build a reference sample and submit it for approval. Once approved, we launch a pilot batch of 500-1000 units in 5-10 business days.