FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1960
1960 - 0115.PDF
FLIGHT, 22 January 1960 115 ivh.D fan-cooled type 678/4, equipped with two Zenith Stromberg^uretters twin Scintilla magnetos, an AC fuel pump and Bosch lerator and starter-motor. The maximum r.p.m. is given onmaker's plate as 4,600, with a reduction gearing of 1.98:1 to output shaft The Flottorp controllable-pitch propeller hasto our knowledge, been previously employed in a British- signed aircraft. This one is of 5ft 6in diameter, and isaically controlled from a winding handle in the cockpit Final drive to change the pitch of the wooden blades is^jversally jointed shafting driving a pinion and toothed wheel i the back face of the sted hub. It is simple and light, weighingnnlv 301b with control gear, and is considerd preferable to a not- miite-rieht, fixed-pitch propeller for initial test flying. An optimumfixed-pitch setting may be chosen later to keep costs down on ^Structure, almost all metal in L72 material, is impressivelylieht An outer wing, less aileron, weighs only 411b and one tail boom 2Hlb. Simple angle and T-section extrusions are usedfor wing spar booms and tail-boom corner-members, but the bulk Right in the cockpit, seots are cantilevered on each side of the central keel, which also supports instru- ment panel, control yoke, rudder-pedal beam and nosewheel mounting Left, these structural de- tails illustrate the use of nylon, balsa, thin-gauge skins, foam stabilization of skin panels and the mounting of the main undercarriage legs and tail booms at the wing rear spar. AH sketches on these pages are by "Flight" artist Arthur Bowbeer of the rib-work, skin, and local stiffening is in 30s.w.g- sheet, 24 s.w.g. being resorted to only on the tread way skin of the centre-section and in therear part of the tail booms. The fore-part of these is skinned in 18 s.w.g. (which is regarded atStapleford as real plate-work). Ribs are at about lft intervals, the skin of the torsion box beingstiffened by a hard PVC foam 0.25in thick stuck to the inner surface by a Titanine adhesive. Eachwing skin is two rib-bays in width and wrappcd- round in one piece from the trailing-edge to thelower surface of the front spar. Wing-tip fittings are already provided for "stores" up to 3001b inweight. The structure in way of the cockpit is at pre-sent restricted to the central box-keel member and associated central beams. PVC foam-sandwich SPAA. I Turin Dooms and tail assembly: control surfaces are Covered with terylene and the elevator quadrant has a nylon centre leaf. Control cables run in fairleads on the inboard face of the boom Above, propeller pitch control, showing the universally jointed shaft from the cockpit driving a pinion and toothed wheel around the propeller hub
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
