At 58 oz-in of torque, the "droop" of the servo arm position is more pronounced, as expected. The overall droop though is still pretty reasonable considering the load, and the benefit of the 5 cell receiver pack is more pronounced.

At 77 oz-in of output torque, the servo no longer operates at 4.8 V, but at 6.0 V the servo is still going strong. Note that the "droop" of the servo horn position is significantly more pronounced, however the total error on a 60 degree servo horn motion

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The HS-6635HB is a standard size servo and hence is pretty easy to fit almost anywhere on a larger airplane.

The HS-6635HB installed on the rudder of our Ultra Stik Lite. Even when dealing with heavy vibration and massive prop-wash over the control surfaces, the HS-6635HB holds strong, with the majority of the control surface vibration coming from the structure