Hitec D940TW D-Series High Speed Titanium Gear Servo

For 20-120 class aircraft, all EP 600-700 class helicopters, all
GP 30-90 class helicopters, 1-10-1/4 scale vehicle steering and
throttle, and nitro and gasoline powered boats
Durable titanium alloy metal gears with dual ball bearings
Ultra hard gear shaft with three axial metal bushings
32-bit MCU and 12-bit ADC for unprecedented programmability and
flexibility
*Programmable digital amplifier with MOSFET drive
Water and dust resistant (splash proof)
Metal center heat sink

D-940TW Wide Voltage Ultra Speed Servo
0.98" (25mm) Single Arm
1.7" (44mm) Double Arm
1.5" (38mm) 4-Point Horn
1.4" (36mm) Round Horn
Four each Grommets, Eylets and Mounting Screws
Metal Adapter Ring, extra Horn Screw

4.8V 6.0V 7.4V
Speed: 0.11 0.07 0.06 sec/60°
Torque: 139 187 229 oz-in
10 13.5 16.5 kg-cm
Motor Type: Coreless
Dimensions: 1.57 x 0.79 x 1.50" (39.9 x 20.1 x 38.1mm)
Weight: 2.40 oz (68.0g)
Number of Teeth on Spline: 25
Diameter of Horn Screw: 3mm

*Programmable features require Hitec Servo Programmer sold separately
HFP-30, DPC-11, HRCP4429

A note on Coreless motors: conventional servo motors have a steel
core armature wrapped with wire that spins inside the magnets. In
a Coreless design, the armature uses a thin wire mesh that forms a
cup that spins around the outside of the magnet eliminating the
heavy steel core. This design results in smoother operation and
faster response time.