beam ruotabile eliportata more sections refined, particularly suitable for the support of metric cameras and cameras pointing to surveys stereofotogrammetrici.

摘要

A multi-section helicopter-borne rotatable beam (3) for supporting at either of its ends range-finder cameras (33) and television focusing cameras (34) for stereophotogrammetric surveys, in which the central tubular section (5) is rotated by means of an electric motor (13) and return springs (19) and supported by two collars (9,10) mounted rotatably by means of hinged constraints on a base (7) fixed rigidly to the floor of the helicopter cab and the two truncated-cone tubular-structure side sections (4,6) of the beam are secured to the said central section by a telescopic coupling arrangement ensured by half-ring ties (22,23) co-operating with flanges (25,26) of the said sections and by through pins (27) and safety split pins (28), the above-mentioned cameras (33,34) being supported by a prismatic box frames (35) in their turn supported, by means of a dampening system comprising springs (36,37,38,39,41,42) and double-acting shock absorbers (44,45,46,47,48,49), inside housings or pods (31,32) with a ventral opening (54), which can be closed with an internally-sliding door (55), and a plexiglass porthole (56). Variants are also envisaged. IMAGE