Lightning protected aircraft telescopic refueling mast

An aircraft telescopic in-flight refueling mast comprising:

• a metallic structural beam, electrically connected to the aircraft by flexible conductive means, having inside a fixed metallic tube and a metallic telescopic tube providing a fuel conduit, and, attached to said beam, flight control surfaces protection means against electric discharges including lightning strikes and electro-static discharges, said protection means including
• insulating means which include an insulated pipe section in the connection interface between the fixed tube and the aircraft fuel system and insulated fittings in those elements susceptible to inject current inside the aircraft fuselage,
• low conductive means which include a concentric liner between the fixed tube and the telescopic tube and a low conductive segment assembled at the beginning of the telescopic tube constituting a dynamic seal between both tubes, and
• conductive means which include means providing electrical contact between the fixed tube and the telescopic tube, sliding electrical contacts between the flight control surfaces and the beam, and flexible electrical connections between the structural beam and the aircraft.