Futaba HPS-A700 - High Performance Airplane Servo
A new all purpose high performance servo for big airplanes. The new Futaba HPS-A700 is the strongest airplane servo that Futaba has ever made with an impressive 74kg of torque (@ 7.4V). Additionally the A700 uses a new HPS brushless motor that is developed to draw the least current possible and produce very little heat.

Specs:
Will replace the earlier BLS172SV & BLS177SV servos
HPS Brushless Digital Motor
Aluminium Case
Metal Gears (top gear is stainless)
Ball Bearings
Water & Dust Protection
Low-wear potentiometer
HV (High Voltage)
S.BUS/S.BUS2 compatible
Operating Voltage: 6-7.4V
Speed: 0.12s/60° (@ 7.4V) - 0.15s/60° (@ 6V)
Torque: 74kg/cm (@ 7.4V) - 63kg/cm (@ 6V)
Size: 40.5 x 21 x 39.4 mm
Weight: 82g