D840WP D-Series Mega Scale WP Du (HRC36840)

These D-Series waterproof servos—the Mega Scale Waterproof Digital Servo and the Giant Scale Waterproof Digital Metal Gear Servo—are designed for large-scale RC models, delivering precise digital control and dependable torque in wet or exposed conditions.

Built for outdoor use, they feature waterproof construction and robust internals for smooth, repeatable motion on primary surfaces such as rudders, ailerons, and flaps. They fit standard servo mounts in big airframes, and the metal-gear variant offers enhanced durability under load, making them well suited for outdoor flights and water-adjacent applications where reliability matters.