Hitec D-980TW 32-Bit Monster Torque 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-980TW Wide Voltage Monster Torque Servo
0.98" (25mm) Single Arm
1.2" (31.5mm) Single Arm
1.7" (44mm) Double Arm
2.2" (55mm) Single Arm
2.8" (72mm) Double Arm
4.2" (108mm) 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: 0.28 0.21 0.14 sec/60°
Torque: 361 500 611 oz-in
26 36 44 kg-cm
Motor Type: Coreless
Dimensions: 1.72 x 0.88 x 1.57" (43.7 x 22.4 x 39.9mm)
Weight: 2.76 oz (78.2g)
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.