L.Opdyke French Aeroplanes Before the Great War (Schiffer)
Deleted by request of (c)Schiffer Publishing
Flight, December 27, 1913.
THE PARIS AERO SALON - 1913.
The remaining machine - the "Ruby" - is undoubtedly the most interesting on the stand, as it represents a very radical departure not only from usual Borel design, but from aeroplane design in general. The raison d'etre of this machine is the consistent demand of the military authorities, for a machine in which the propeller is mounted behind the main planes, while the pilot's and observer's seats are situated well out in front, partly to facilitate observation and partly to allow of a gun being mounted in such a manner that it may be fired in all directions without the propeller interfering with it.
The fuselage, which is of rectangular section, and which tapers gradually towards the bow and the stern, is built up of four longerons of ash, connected by struts and cross-members of spruce. In the central part of the fuselage, and between the two planes, is mounted the engine - a 50 h.p. Gnome - which drives, through a long shaft, a small propeller situated behind the tail-planes. Where the four longerons converge in the rear of the fuselage, is a ball thrust bearing which relieves the long shaft of all end thrust. In the front part of the fuselage are arranged the seats for the pilot and passenger, the pilot occupying the front seat. In front of him is a Hotchkiss machine gun mounted on the apex of a structure of three steel tubes secured to the nose and upper longerons of the fuselage, respectively. Control is by means of a single central steel tube, which operates the warp and elevator, whilst a pivoted foot-bar actuates the rudder.
The chassis is of a very simple form, and consists of two pairs of ash struts, each pair forming a V. Two stub axles, which are pivoted on another pair of V struts, and work in slots between the chassis struts, are sprung from these by means of rubber shock absorbers.
The tail planes, which are of rather unusual shape, as well as the tail skid, are illustrated by one of the accompanying sketches.