T-MOTOR HEP-L 15*5.5

The T-MOTOR HEP-L 15*5.5 is a lightweight, one-piece straight propeller for long-endurance multi-rotor UAVs. Its resin-based carbon fiber composite construction incorporates a PMI foam core, while a reinforced structure supports stable cruise. It is recommended for MN4006 EVO KV380 motors in a 6S configuration.

T-MOTORDrone motor

Material: Resin-based carbon fiber composite + PMI foam core

Product overview

The T-MOTOR HEP-L 15*5.5 is a one-piece straight propeller for long-endurance multi-rotor UAVs. Its 15-inch (384.3mm) diameter and 5.5-inch (139.7mm) pitch pair with a common operating range of 3000~4300 RPM and 0.47~1.0 kg thrust. The recommended propulsion solution combines the MN4006 EVO KV380 motor with AIR 40A 6S. With these motors and a 6S configuration, the recommended quadcopter takeoff weight is 3kg. Recommended maximum speed is 8400 RPM, with a limit speed of 9300 RPM.

Built from resin-based carbon fiber composite with a PMI foam core, each propeller weighs about 15.5g and has a matte finish. High-toughness resin, surface fiber reinforcement and a damage-tolerant design limit micro-damage propagation, while the enhanced structure reduces vibration and improves wind resistance during cruise. The flange mount uses a Ø4mm center hole, a Ø12mm bolt circle and two Ø3mm mounting holes. An integrated molded QR code supports traceability, and protective packaging helps protect the propeller during transport.

Motors & ESCs

Specifications

Specification	Value & conditions
Manufacturer and model	T-MOTOR HEP-L 15*5.5
Product type	One-piece straight propeller
Application	Long-endurance multi-rotor UAV
Diameter	15 inches (384.3mm)
Pitch	5.5 inches (139.7mm)
Common thrust range	0.47~1.0 kg
Common speed range	3000~4300 RPM
Single propeller weight	About 15.5g
Material	Resin-based carbon fiber composite + PMI foam core
Recommended maximum speed	8400 RPM
Surface treatment	Matte
Recommended maximum thrust	4 kg
Limit speed	9300 RPM
Limit thrust	5 kg
Mounting interface	Flange mount; Ø4mm center hole; Ø12mm bolt circle; two Ø3mm mounting holes
Recommended battery configuration	6SHEP-L 15*5.5 with MN4006 EVO KV380 motor.
Recommended takeoff weight	3kgQuadcopter using HEP-L 15*5.5 with MN4006 EVO KV380 motors and 6S.
Recommended propulsion solution	MN4006 EVO KV380 + AIR 40A 6S
Structural reinforcement	High-toughness resin, surface fiber reinforcement and a damage-tolerant design limit micro-damage propagation.
Impact resistance	HEP-L impact depth: 1.93mm; NS impact depth: 2.54mm; 24% improved impact resistance.Identical 6J impact energy.
Cruise behavior	Enhanced propeller structure reduces vibration and improves wind resistance during cruise.
Identification and packaging	Integrated molded QR code and protective packaging.
Performance measurements	RPM \| Torque (N·m) \| Thrust (gf) \| Output power (W) \| Efficiency (gf/W) 3700 \| 0.14 \| 721 \| 55.88 \| 12.90 4100 \| 0.18 \| 902 \| 75.26 \| 11.98 4500 \| 0.21 \| 1102 \| 99.13 \| 11.12 4900 \| 0.25 \| 1323 \| 127.98 \| 10.34 5300 \| 0.29 \| 1563 \| 162.32 \| 9.63 5700 \| 0.34 \| 1822 \| 202.66 \| 8.99 6100 \| 0.39 \| 2102 \| 249.48 \| 8.42 6500 \| 0.45 \| 2401 \| 303.30 \| 7.92 6900 \| 0.50 \| 2720 \| 364.61 \| 7.46 7300 \| 0.57 \| 3058 \| 433.93 \| 7.05 7700 \| 0.63 \| 3417 \| 511.74 \| 6.68 8100 \| 0.71 \| 3795 \| 598.55 \| 6.34 8500 \| 0.78 \| 4192 \| 694.87 \| 6.03 8900 \| 0.86 \| 4610 \| 801.19 \| 5.75 9300 \| 0.94 \| 5047 \| 918.02 \| 5.50Ambient temperature 22 °C; altitude 25 m.
Measurement environment	Ambient temperature: 22 °C; altitude: 25 mPerformance measurements.