Hitec 36840 D-Series D840WP Waterproof Mega Scale Servo

Ideal for airplane, giant scale car, boat, UAV and robotic
applications
Center heat sink for efficient motor cooling
Operates on 3.5-8.4V
Programmable high response digital amplifier*
Durable steel gears with dual ball bearings
Water and dust resistance

D840WP Servo with 1.6" (39.9mm) Round Servo Horn, 1.8" (46mm) Single
Arm, 2.2" (55mm) Double Arm Aluminum Horn. 2.4" (61mm) 4-Point
Horn
Four each, Grommets, Eyelets and Screws
3mm Servo Horn Screw

Dimensions: 2.59 x 1.26 x 2.44" (66 x 32 x 62mm)
Weight: 8.0oz (227g)
Output Spline: Mega 15
4.8V 6.0V 7.4V
Speed: 0.17 sec/60° 0.14 sec/60° 0.11 sec/60°
Torque: 264oz-in (19kg-cm) 333oz-in (24kg-cm) 417oz-in (30kg-cm)