A rotor, in particular for a rotorcraft, encompassing: a rotor head, at least one rotor blade, and a rotor-head-end rotor-blade connector having an integral, bearingless, centrifugal-force-controlled blade angle adjustment device. The infrared heaters are located below the trays and direct IR at the trays. A single search provides immediate access to every level of a document, without having ato re-search a single string to determine which sub-parts of that string match the search string.