Futaba S9157 Servo Digital Hi-Torque

This is the Futaba S9157 High Torque Servo. / / FEATURES: Ideal for large competition airplanes / Coreless motor / Dual ball bearings and metal gears / Metal middle case helps dissipate heat for cooler operation / One year limited warranty / / INCLUDES: Futaba S9157 High Torque Servo with 0.83" (21mm) diameter round horn, / 1.8" (45mm) diameter round horn, 1.2" (31.5mm) 6 point horn, 1.5" / (38.5mm) 4 point horn and mounting hardware / / REQUIRES: Installing in model, connecting linkage and connecting to receiver / / SPECS: Torque: 425oz-in (30.6kg/cm) @ 6V / Speed: 0.14 @ 6V / Size: 1.6 x 0.8 x 1.5" (41 x 21 x 37mm) / Weight 2.5oz (71g) / Horn Screw Size: 3x8mm / / COMMENTS: Use with NiCD batteries only / 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.