FPV Frame Build Guide: Components, Layout, and Stack Assembly

Choosing a Frame

Frame choice drives everything else in a build. Key considerations:

• True X vs Stretch X: True X (equal arm angles) handles more symmetrically. Stretch X (rear arms wider) is more common on racing builds for yaw authority.
• Stack height: Measure your FC + ESC + VTX stack height before buying a frame. A 30mm stack in a frame rated for 25mm will not close.
• Arm thickness: 4mm arms for freestyle and cinematic work. 3mm is lighter but cracks on hard impacts.
• Material: T700 carbon fibre for the best strength-to-weight ratio. Avoid cheap 3K weave frames for anything serious.

Component Stack Layout (bottom to top)

1. ESC (4-in-1) — closest to the frame bottom plate for thermal management
2. Flight Controller — connected to ESC via solder pads or connector
3. VTX (if not integrated) — on top of the stack with antenna exiting the rear
4. GPS module (if fitted) — mounted away from the VTX to reduce interference

Assembly Order

Solder before you bolt. Always complete your soldering work before the components are confined inside the frame:

1. Solder motor wires to ESC pads — leave 3–4cm of wire slack for routing.
2. Solder power lead and XT60 to ESC power input.
3. Connect FC to ESC (solder or connector).
4. Solder VTX power and video signal.
5. Mount camera and run video cable.
6. Install stack into frame — check for shorts before inserting battery.

First Power-On Safety Check

Before connecting a battery, use a smoke stopper (a battery lead with a light bulb in series). If there is a short, the bulb lights up and limits current — protecting your ESC and FC from instant death.