T-Motor P21 x 6.3 Carbon Fiber Propeller (Pair)

The T-Motor P21 x 6.3 is a 21-inch polished carbon fibre propeller from T-Motor's P series, two blades integrated and supplied as a clockwise/counter-clockwise pair. It is sized for heavy-lift industrial multirotors that need more lift per arm than an 18-inch prop delivers.

Key features

• 58 g per propeller across a 533.4 mm span.
• Thrust limit of 10.8 kg per propeller, with an optimum operating band of 2900–5000 RPM.
• Carbon fibre and epoxy laminate with a polished surface, balanced at the factory.
• L (clockwise) and R (counter-clockwise) markings, read from above, for quick and correct assembly.
• Rated for -40 to 65 °C operation and storage from -10 to 50 °C.

Specifications

• Diameter: 21 in (533.4 mm)
• Pitch: 6.3 in (160 mm)
• Blades: 2, integrated
• Material: Carbon fibre + epoxy, polished
• Weight: 58 g per propeller
• Thrust limit: 10.8 kg
• Optimum speed: 2900–5000 RPM
• Operating temperature: -40 to 65 °C
• Storage: -10 to 50 °C, under 85% humidity
• Pack: 2 propellers (1 CW + 1 CCW)

Match it to a low-KV motor rated for 21-inch props and confirm the hub's bolt pattern fits the motor's prop holder. Use medium-strength anaerobic threadlocker on the mounting screws, keep the props within their thrust limit, and inspect them before each flight.