Guided bullet

An airborne vehicle comprising:

• a housing;
• a plurality of micro electrostatic electromechanical (MEMS) devices disposed about an axis of flight of the airborne vehicle, the MEMS devices each comprising an integral control surface/actuator having a flap portion;
• a rotation sensor for producing a first signal responsive to a rate of rotation of the airborne vehicle about the axis of flight;
• a lateral acceleration sensor for producing a second signal responsive to acceleration of the vehicle in a direction normal to the axis of flight;
• and
• circuitry connected to the rotation sensor and to the lateral acceleration sensor and to the plurality of MEMS devices, the circuitry operable to actuate the MEMS devices in sequence about the axis of flight at a rate of rotation responsive to the first signal and to the second signal.

A method of controlling the trajectory of an airborne vehicle, thee method comprising the steps of:

• providing a plurality of electrostatic micro electromechanical MEMS devices on an airborne vehicle, each MEMS device comprising an integral control surface/actuator and having a flap portion adapted to move between a withdrawn position and an extended position;
• determining a desired change in trajectory of the airborne vehicle relative to an axis of flight;
• and
• actuating a selected portion of the MEMS devices to extend the respective flap portions into and out of an air stream passing over the airborne vehicle to achieve the desired change in trajectory.