How to Build a 5-Inch FPV Drone From Scratch

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The 5-inch freestyle quad is the classic first real build. It’s powerful, endlessly repairable, and every skill you learn here carries over to every drone you build after it. This guide covers the full build in the order you’ll actually do it, from an empty frame to your maiden flight.

Time: 6–10 hours for a first build. Difficulty: Beginner to intermediate. You’ll need: the tools in our tool guide and basic soldering skills.

The parts list

Before buying, check that the stack’s mounting pattern (30.5×30.5 mm here) and the motor mounting pattern (usually 16×16 mm for 2207) match your frame. Our guides to motors, ESCs and frames explain each spec.

Step 1: Assemble the frame

1. Lay out all frame parts and screws, sorted by length.
2. Bolt the arms to the bottom plate, with blue thread-locker on metal-into-metal screws only.
3. Install the standoffs, but leave the top plate off. You’ll need room to work.
4. Check the frame for loose arms by gently twisting each one.

Step 2: Mount the motors

1. Mount each motor with the screws included with your motors. Measure screw length: a screw that touches the motor windings will short it. There should be a visible gap between the screw tip and the copper.
2. Point the motor wires toward the center of the frame.
3. Don’t worry about which way each motor spins yet. You’ll set direction in software.

Step 3: Install and solder the ESC

1. Mount the 4-in-1 ESC on soft-mount grommets, arrow pointing forward.
2. Cut each set of three motor wires to length. Leave enough slack that the wires don’t pull tight when an arm flexes, but not so much they hang near the props.
3. Tin the wire ends and the ESC pads, then solder each motor’s three wires to its three pads. Wire order on a brushless motor doesn’t matter for whether it works; swapping any two wires only reverses its direction, which you can also do in software.
4. Solder the XT60 battery lead to the main power pads, red to positive. Solder the capacitor across the same pads, observing polarity: the stripe marks negative. Keep its legs short and protect it with heat shrink.

Step 4: Smoke-test the ESC

Before adding the flight controller, plug in a battery through a smoke stopper. The ESC should beep its startup tones. If the smoke stopper trips, unplug and inspect for solder bridges. Read the first power-up checklist for the full procedure.

Step 5: Mount and wire the flight controller

1. Connect the FC to the ESC with the harness cable included in the stack.
2. Mount it on its grommets above the ESC, arrow forward.
3. Solder the receiver: 5 V and ground to a 5 V pad, the receiver’s TX to an FC RX pad, and its RX to the matching FC TX pad (on one UART, such as UART2).
4. Wire the FPV system following its diagram. Digital VTX units usually use one UART plus 9 V or battery voltage power. Check the VTX’s voltage range before you solder.
5. Route the receiver antennas at 90 degrees to each other, away from carbon fiber and props. Zip-tie them to the rear arms or a 3D-printed mount.

Step 6: Configure Betaflight

Connect the FC to your computer with USB and open Betaflight Configurator. Our full Betaflight setup guide walks through each tab. The essentials:

• Ports: enable Serial RX on the receiver’s UART.
• Receiver: select CRSF protocol for ExpressLRS and confirm sticks move the channel bars.
• Modes: assign an arm switch, and add Angle mode and turtle mode to switches.
• Motors: props OFF. Check each motor spins in the right position and direction. Betaflight’s default “props in” layout has the rear right motor spinning clockwise when viewed from above. Reverse any wrong motor in the motor tab.
• Failsafe: set stage 2 to “Drop” for freestyle in open areas.
• OSD: add battery voltage, timer and warnings.

Step 7: Bind the radio

Flash your receiver and radio module to the same ExpressLRS version and binding phrase. Power the drone; the receiver LED turns solid when linked. See the radio link guide.

Step 8: Final assembly

1. Install the top plate and camera, tilted up 20–35 degrees.
2. Mount the props: each prop’s leading edge should face the motor’s direction of rotation. With “props in,” the front props spin toward the camera’s center line at the front.
3. Tighten prop nuts firmly, but don’t crush the hub.

Step 9: Maiden flight

1. Run the pre-flight checklist.
2. In an open field, away from people, arm in Angle mode and hover at waist height.
3. Listen and watch. Oscillation, hot motors or drifting point to a setup issue. Land and check.
4. Switch to Acro once it hovers cleanly, and fly gentle laps.
5. After the first pack, touch each motor. Warm is fine. Too hot to hold means a tuning or filtering problem. See PID tuning.

Common first-build mistakes

• Motor screws too long, shorting the motor.
• Receiver TX/RX wires not crossed.
• Capacitor missing on a 6S build.
• Props installed backward, causing an instant flip. See troubleshooting.