Parts guide
Drone Parts Explained: Every Component and What It Does
A multirotor is a handful of parts that each do one job. Knowing what each one does — and which spec matters when you pick it — is most of what you need to build, upgrade or repair a drone. This is the full list, from the frame outward.
Published 24 September 2026 · by the Fioparts team, Gurugram
Every multirotor, from a 65 mm whoop to a 30 kg agricultural sprayer, is built from the same short list of parts. The specs change with size; the jobs don’t. Here is the list, with what to look at when you choose each one. If you would rather see them matched into a working set, the kit builder does that from live stock.
1. Frame
The frame holds everything and takes the crashes. FPV frames are carbon fibre plates and arms; DIY and heavy-lift frames use plastic or carbon arms on a plate that doubles as a power distribution board. Frames are named by the largest propeller they take — a 5-inch frame fits 5″ props — and by wheelbase (motor-to-motor diagonal) in millimetres: 220–250 mm for 5″, 300 mm+ for 7″, 450 mm for the classic F450.
What matters: prop size, stack mounting pattern (30.5×30.5 mm or 20×20 mm), arm thickness (4–6 mm for 5″ freestyle), camera size it accepts (19/20 mm micro or 14 mm nano), and whether spare arms are sold. Frames · Frame parts & spares.
2. Motors
Brushless outrunner motors spin the props. Two numbers describe them: the stator size (2207 = 22 mm wide, 7 mm tall) and the KV rating (RPM per volt). Bigger stators make more torque for bigger props; KV is chosen to match the battery voltage. A quad needs four; hexacopters six.
What matters: stator size for the prop, KV for the cell count, shaft/prop mount (M5 nut on 5″, press-fit or T-mount on micros), bell quality and bearings. Read Motor KV explained for the pairing table. Motors.
3. Electronic speed controllers (ESCs)
An ESC turns the flight controller’s “this much throttle” command into the three-phase AC that drives a brushless motor, thousands of times a second. FPV quads use a 4-in-1 ESC — all four channels on one board under the flight controller; larger builds use one single ESC per motor. The amp rating is continuous current per motor: 35–65 A is normal for 5″, 20–30 A for DIY 450-class quads.
What matters: amps per motor, voltage range (4S, 6S, up to 12S for heavy-lift), firmware (BLHeli_S, BLHeli_32, AM32), and the mounting pattern matching your FC. 4-in-1 ESCs · Single ESCs.
4. Flight controller (FC)
The flight controller is a small computer with a gyroscope and accelerometer. It reads your stick commands from the receiver, reads the gyro, and adjusts each motor to keep the drone doing what you asked. Firmware decides its personality: Betaflight for freestyle and racing, INAV and ArduPilot for GPS navigation and autonomy.
What matters: firmware target, processor (F405/F722/H743), number of UARTs (each peripheral needs one), mounting size, and whether it is sold as a stack with a matching ESC. See the flight controller guide. Flight controllers · Stacks.
5. Propellers
Props convert motor RPM into thrust. They are named by diameter × pitch × blade count: a 5143-3 is 5.1″ across, 4.3″ pitch, three blades; a 1045 is 10″ × 4.5″. Half of every set spins clockwise, half counter-clockwise — you need both. Props are consumables; buy several sets.
What matters: diameter for the frame, pitch and blade count for feel (more pitch and blades = more grip and more current), hub type (5 mm bore, T-mount, or 1.5 mm shaft on whoops). Propellers.
6. Battery
Almost always lithium-polymer (LiPo): 1S for whoops, 4S or 6S for 5″, 6S for 7″ and above, or Li-ion packs where flight time matters more than punch. The label reads cell count (S), capacity (mAh) and discharge rating (C).
What matters: cell count to match motors and ESC, capacity vs weight, connector (XT30, XT60, XT90, BT2.0). The LiPo battery guide and Li-ion guide go deeper. Batteries & charging.
7. Charger
A balance charger tops up each cell of the pack individually. Look for the cell range (1–6S covers most hobby packs), the watts (a 100 W charger fills a 6S 1300 mAh pack in under an hour), and whether it runs on mains or needs a separate DC supply. Chargers.
8. FPV camera, video transmitter and goggles
The pilot’s eyes. An analog system is a camera, a 5.8 GHz VTX and an antenna on the drone plus goggles on the ground; a digital system (DJI O4, Walksnail, HDZero) combines camera and transmitter into an air unitthat pairs only with its own goggles. What is FPV explains the choice. Video systems.
9. Radio transmitter and receiver
The radio in your hands sends stick positions to a receiver on the drone, which hands them to the flight controller. The protocol has to match on both ends: ELRS is the modern standard for FPV; FlySky and FrSky remain common on DIY builds; Crossfire for long range. Radios & receivers.
10. GPS and compass
Optional on a freestyle quad, essential for return-to-home, position hold and autonomous missions. A GPS module talks to the FC over a UART; a compass (magnetometer) is needed by ArduPilot and INAV for heading. GPS & compass.
11. Antennas, capacitors, buzzers, straps
The small parts that make a build reliable: a circularly-polarised antenna on the VTX, a low-ESR capacitor across the battery leads to clean up video noise, a buzzer or finder to locate a downed quad, a battery strap and pad. FPV antennas · Capacitors · Buzzers & finders · Straps & pads.
Drone spare parts worth keeping
Props (several sets), a spare arm for your frame, a motor, an antenna, a camera lens or cover, zip ties and heat-shrink. A crash on a 5″ quad usually costs a prop; the next most common casualties are an arm, a motor bell and the VTX antenna. Everything on this list ships pan-India from Gurugram with a GST invoice.