Futaba FUSAG300 micro servo for F3K gliders, slim SBUS2 sailplane servo  [FUSAG300]

The Futaba FUSAG300 is a micro-size servo intended for F3K style hand-launched and thermal gliders, featuring SBUS2 control compatibility and a slim 8mm case profile. Its published metrics include a lightweight 10.8g mass, rapid transit of 0.065 sec, and rated torque of 2.5kg at 7.4V, values relevant when matching servos to control surface size and linkage geometry.

This servo's SBUS2 interface allows simplified wiring and position feedback on compatible Futaba receivers and flight controllers that support the protocol. In glider builds the slim case helps minimize drag and fit tight fuselage trays; pay attention to tray depth and servo mounting tabs when replacing stock units.

Installation notes: check spline compatibility with your control horns, confirm the required travel and center before final gluing, and verify that the 8mm case thickness provides adequate clearance for pushrods and servo covers. For tuning, use the receiver or transmitter endpoint and subtrim adjustments to set neutral and end points, and prefer soft-linkage geometry where possible to reduce flutter risk on thin control surfaces.