GB542422A - Improvements in aircraft - Google Patents

Abstract

542,422. Aero-engine accessories. CONSTANT SPEED AIRS CREWS, Ltd., and MARSHALL, F. G. Aug. 24, 1940, No. 13422. [Class 4] In aircraft having forwardly extended airscrew shafts and in which the distance between the spinner and the engine cowling or housing or the edges of the wings exceeds the usual distance, the gap therebetween is wholly or partly closed by means of a detachable fairing, fixed relatively to the spinner or rotatable therewith, capable of being secured in and removed from its position of use without dismantling the airscrew. In the form shown, the gap between the spinner 4 and the cowling 6 is wholly closed by a fairing 6 fixed to the bearing 9 of the extended airscrew shaft 2 by means of diaphragms 7. The latter are detachably connected at their outer peripheries with the fairing preferably by a connection comprising a series of pins 10 on an annular flange of the fairing which engage with apertures 11 in the diaphragm and are locked by means of a ring 12, provided with key-hole slots the narrow parts of which engage with annular grooves 10a around the free ends of the pins when the locking ring is turned in one direction. Rotation in the reverse direction brings the large ends of the key-hole slots into register with the pins to allow of their disengagement. The fairing is made in two or more longitudinal sections, hinged together if desired. The connecting edges of the sections are detachably united by the connecting means described. In a modification described, the fairing is arranged to rotate with the spinner by connecting the diaphragms directly to the extended airscrew shaft. The diaphragms may be replaced by spoked members of the kind described in Specification 537,451. Resilient devices may be interposed between the fairing or its supports and the attachment base therefor preferably as described in Specification 536,000. Specification 451,553 also is referred to.