An aircraft which an inflatable, indestructible self righting \u201cBeach Ball\u201d with almost helicopter performance. The brew head comprises an upwardly directed inlet for supplying water to the brew head, a downwardly directed outlet for outflow of beverage produced by the machine, and a closure mechanism moveable between open and closed configurations. Preferably, the resonator is a single-frequency solid state laser containing a solid state gain medium defining a physical path length Lg. The gateways also convert packet signals in the generic protocol into audio and signalling in a protocol understandable by a respective radio system.