Winter / off-season maintenance

Off-season is when pilots maintain instead of convince themselves props are fine. Monsoon breaks, festival travel, or plain burnout — whenever flying pauses, the quads on the shelf need deliberate care. Spring's first good day is won in the boring weeks before it.

Why off-season work matters

Screws loosen from vibration seasons. Batteries sit at wrong voltage. Firmware drift means your backup dumps are stale. Arms you taped "for next weekend" become structural lies. A Sunday audit beats losing a flying Saturday to preventable failures.

Batteries

Storage voltage per LiPo safety
Discard puffy or weak packs — label dates
Check connector resistance visually

Storage voltage discipline

LiPo and Li-ion packs should sit near storage charge — not full, not empty. Check monthly if storage extends long. Swollen packs go to recycling, not the back of the drawer.

Pack state	Action
Full charge sitting 2+ months	Discharge to storage
Flat for unknown time	Balance charge carefully; retire if puff
Loose connector fit	Rewire or retire
Unknown cycle count	Label now; track forward

Connector audit

Wiggle XT60, XT30, PH2.0 pins — heat discoloration and loose housings fail on first spring arm. Replace housings before season, not at the field.

Quads on shelf

Props off — reduces bend stress
Wipe monsoon dust if applicable
Note crash arms you “will fix later”

Mechanical shelf prep

Per quad off-season:
1. Props removed — label bag per quad
2. Wipe carbon — look for hairlines you ignored
3. Torque stack screws lightly — check for loose
4. Spin motors — seized bearing now is cheap fix
5. Camera/vtx connectors — unplug if long storage
6. Note list on tape: "replace arm", "new props", etc.

See carbon splinters and cracks during wipe-down — off-season is replace-arm season.

Firmware

Backup Betaflight dumps per quad
Update radio, ELRS, ESC if changelog fixes real bugs — not update roulette night before first spring day
ESC firmware one board at a time

Backup before update

Save diff all dumps and note firmware versions. Update one component class per evening — radio tonight, ELRS tomorrow, ESC another day. If something breaks, you know which change caused it.

What not to update blindly

Betaflight on a quad that flew perfectly — unless you need a specific fix
ESC firmware all four at once without spare ESC
Radio bootloader without reading release notes

Spare audit

Props (real counts)
Arms for your most-flown frame
VTX antenna
Standoffs / nylon screws
Field kit consumables

Restock from the Armory or local shop before rush season.

Honest prop counts

Count what is in bags, not what you wish you had. Freestyle pilots burning four props per weekend need dozens for the season. Whoop pilots need grams of 31 mm props — different list, same discipline.

Field kit refresh

Open your field repair kit — replace used tape, confirm hex keys match current frames, multimeter battery OK, spare zip ties stocked.

Goggles and radio care

Goggles collect dust and foam wears out. Wipe lenses, check fan filters, charge goggle batteries to storage if they use LiPo packs. Radio gimbals benefit from light dust blow — not WD-40 roulette. Update radio firmware when changelog mentions ELRS or switch fixes you actually use.

Bench tools and solder

Off-season is soldering practice time: repair lifted pads on spare board, refresh iron tip, organize flux before builds resume. Clean smoke stopper connections and meter leads.

Spring first day

Repeat first 10 flights discipline lightly — bearings seize, screws loosen.

Spring shakedown

Even if the quad flew great in October:

Bench smoke stopper pass
Motor direction check
Failsafe test
Short LOS hover
Then FPV and style

Treat season opener like a mini new build — because mechanically it is.

India-specific off-season

Not everyone has winter — monsoon is many pilots' off-season. Humidity storage matters: silica in battery bags, dry shelf, connectors inspected for corrosion. Import spares ordered during monsoon arrive before October flying peaks.

Summer extreme heat pauses midday flying — use noon breaks for bench work, not pack charging in sun.

Photo inventory

Snap each quad's stack layout, receiver placement, and vtx routing before disassembly season. Spring-you forgets which UART was GPS. A phone album per quad saves configurator archaeology.

Sell or retire dead projects

Off-season is when half-built frames on the shelf either get finished or sold. A drawer of abandoned 3-inch projects costs mental energy each time you open it. Part out working components to fund spring spares — honest BNF vs scratch accounting helps.

VTX and antenna shelf care

Remove vtx antennas before long storage if the quad sits in a bag that gets compressed — SMA joints stress over months. Cap connectors with small heat-shrink or SMA caps to keep dust out of threads. Note vtx channel and power settings on tape; spring-you forgets what you locked for the club field.

Pigtails tucked under top plates can kink. Straighten coax gently and verify no inner braid is exposed before first spring arm. A vtx that worked in October with a cracked pigtail is a mystery link-loss quad in March.

Radio and goggle batteries

Handheld radio packs deserve the same storage discipline as flight LiPos. Check manufacturer guidance — many use Li-ion or removable packs that should not sit full for months. Goggle battery modules: storage charge if the manual says so; remove from goggles if the shelf is humid.

Off-season is when you actually read EdgeTX release notes and back up models to SD card. Radio firmware updates belong here, not the night before a trip.

Motor bearing spot-check

Spin each motor by hand off-season. Gravelly bearings get a drop of appropriate oil per motor manufacturer guidance — not random WD-40 on every brand. If a bell wobbles, replace before spring; bearing failure mid-season always lands in tall grass.

Note motor hours on tape if you run one favourite quad most weekends — matched motor sets matter for tune consistency when you finally replace one corner.

When to stop auditing and order

If the spare list exceeds what you can source in two weeks, order early. Domestic props and arms beat customs roulette before the first club fly-in. If packs are puffy, stop debating — retire and replace.

Armory

Audit spares against Propulsion / 5" Prop, Propulsion / 2207, and the Armory before spring — order in the off-season lull.