The Power HD Storm-4 high voltage servo is a must for those big 50~100cc aerobatic aircraft or 1/8th scale cars.This is a high quality all metal cased servo that has titanium alloy and steel gears, has masses of torque, is very quick and has excellent resolution for smooth control inputs.
Torque: 21.0kg (6V) 25.0kg (7.4V)
Speed: 0.10sec/60° 0.085sec/60°
Dimensions: 40 x 20 x 38mm
Gears: Titanium alloy and steel
Spline Count: 25
Bearings: Double ballraced
Unit Weight (g):
I am using this for the rudder on a 87" 3DHS extra and after a dozen or more flights it has performed perfectly. Just the other day I maintained a rolling harrier for the entire flight time of 11 minutes which requires constant rudder input and the servo held up just fine. I also did several minutes of continuous knife edge with no problems. It's a nice servo that performs great.