Quick Answer
A pre-flight checklist catches problems before they cost you money. Check your battery voltage, prop condition, control link, video signal, and flight controller orientation every time you power on. We see more builds destroyed by a single unchecked loose prop nut than by any mid-air failure.
Why You Need a Pre-Flight Checklist
Every pilot who has been in FPV for more than a few months has a story about the crash that a 30-second check would have prevented. We see this because customers send us the photos. Reversed props, disconnected antennas, depleted batteries, and failsafe settings changed during a bench session and never tested: these are the four horsemen of avoidable crashes.
We run this sequence on every build leaving our workshop, from a beginner whoop to a 7-inch long-range rig.
The 30-Second Visual Check
Before you touch a radio or power on a battery, pick up the quad. Check each propeller is secure and not chipped. A cracked prop at 20,000 RPM will fail violently and can crack a frame arm. We stock 5x3 props in 8-packs because beginners go through them fast. Budget ABS props are fine for low-power builds, but on 4S and above, polycarbonate props bend instead of shattering.
Check every standoff is tight. Look for wires shifted near the props, especially the VTX antenna lead. Verify the FPV antenna is screwed in and the element is not bent. Check your ELRS receiver antenna is clear of carbon fibre and not wrapped around an arm.
Battery and Power Check
Check battery voltage with a checker before every flight. A fully charged 4S LiPo reads 16.8V (4.2V per cell), or 17.4V for LiHV packs. If any cell sits below 4.0V after charging, that pack is degraded. We have seen cells drop to 0V mid-flight because a pilot used a puffed pack without checking.
Inspect the connector for heat damage or loose pins. An XT60 that has been cycled hundreds of times develops resistance, which shows up as voltage sag under load. Browse our battery range if yours are past their best.
Always fit a Vifly Finder V2 or similar self-powered buzzer. Even if your FC beeper works, a battery ejected in a crash takes the beeper with it. The Vifly has its own built-in 80mAh LiPo battery and beeps for up to 30 hours independently.
Radio, Video, and Failsafe
Power on your radio first, then the quad. Confirm all channels respond correctly in Betaflight. If you recently changed rates, expo, or channel mapping, this is where you catch the mistake.
Check your video feed before putting on goggles. Verify the VTX is on the correct channel and power level. At a field with other pilots, confirm no channel conflicts. A quick glance at your antenna setup to ensure both VTX and goggle antennas share the same polarisation (both RHCP or both LHCP) saves confusion about poor range.
Verify your failsafe configuration. With the quad armed and props off, turn off your radio. It should execute your failsafe action within one second. If it does not, do not fly.
Flight Controller and GPS
Open Betaflight Configurator and confirm the gyro is initialised. Check the artificial horizon responds to physical tilts. If you have a GPS module like the Holybro M10, wait for a satellite lock before taking off. GPS rescue does nothing without a fix.
Confirm your flight controller orientation matches the physical mounting. If you moved the FC during a repair, the arrow on the board must point forwards. Getting this wrong means the gyro reads forward flight as sideways.
First Arm Test (Props Off)
Remove the props, arm the quad, and confirm all four motors spin smoothly with no stutter. A rough-sounding motor at low RPM usually means a bent bell or damaged bearing. Fix it before fitting props.
Verify your OSD elements display correctly through your goggles: battery voltage, flight mode, and timer should read sensible values.
FAQ
Q: Do I really need a checklist for every flight?
A: Yes. The one time you skip it will be the time your props are on backwards. It takes 30 seconds and saves equipment worth hundreds of pounds.
Q: What is the most common thing pilots forget to check?
A: Prop direction. Even experienced pilots reverse props after a repair. Spin each motor by hand and confirm the prop pushes air downwards. The second most common miss is antenna polarisation mismatch between VTX and goggles.
Q: Should I test failsafe with props on or off?
A: Always off. You are deliberately triggering signal loss. With props on, an unexpected throttle spike can cause injury. Remove props, arm, then turn off your radio.
Q: How do I check battery health without a checker?
A: Your OSD shows total voltage but not individual cell balance. A balance lead checker costs a few pounds and tells you instantly if any cell is weak. We consider it as essential as the battery itself.