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An Unconventional Monoplane

An Unconventional Monoplane May, 1932 AIRCRAFT ENGINEERING 111 A Low-Wing Four-Seater with Mono-Spar Wings and Fuselage and Tw o Pobjoy Engines N the August, 1929, issue of AIRCRAFT tub e on each side sloping u p a t an angle t o meet th e ENGINEERING appeared the first technical spar fittings a t th e wing roots. Triangular frames I description of his single-spar wing, con­ are formed on each side by strut s between the to p tribute d by Mr. H . J. Stieger himself. The Mono- an d bottom members and, in a horizontal plane, Spar wing ha d the n only just made its appearance, b y two tubes connecting the outer ends of the an d a specimen, showing the principles of the girder to th e botto m fuselage longerons. The outer invention, was the n creating great interest at the sections of th e wings are constructe d on th e familiar Olympia Aero Show, on a stand which was visited Mono-Spar system, illustrated in one of the illus­ by every aeronautical engineer who came to th e tration s reproduced from Mr. Stieger's article in exhibition. The Air Ministry had already shown AIRCRAF T ENGINEERING already referred to. The its interest in th e wing, and official tests carried ou t built-u p steel-girder main-spar is braced on the on an experimental wing to its order were referred king-post system by compression tubes passing to by Mr. Stieger in his article. throug h it at right angles horizontally, from the extremitie s of which swaged rods are take n to th e Soon afterwards, the Mono-Spar Company to p and bottom flanges of the spar. The other Limited was formed and an experimental three- diagra m shows th e ingenious manner in which th e seater machine with two 40 h.p . Salmson engines false spar of th e aileron is used in conjunction with wa s built to th e firm's order b y th e Gloster Aircraft th e main wing-spar to triangulat e th e oute r portion Company. This machine made its appearanc e last of the plane—a method which Mr. Stieger also summer . Meanwhile, as a result of the original forecast in his article . The leadin g edge is a channel- tests , the Air Ministry ordered a wing for the section girder in duralumin bolted to th e compres­ Fokke r VII.3.m machine it possessed, in order sion bracing tubes. tha t a direct comparison of weights with a wing of conventiona l design and construction might be Th e ailerons are built up round deep channel- made . sectioned spars with channel-section ribs at in­ tervals . On March 4, 1931, General Aircraft Ltd. was formed, with Mr. Stieger as chief engineer and designer and joint managing director, to build machines in a factory a t Croydon aerodrome. The Th e Fuselage first of six machines laid down by thi s company is on the point of completion and will shortly be Th e fuselage is in two portions. The front read y to go to Martlesham Heath for its official portion is of shallow section on normal box-girder typ e certificate tests. lines with duralumin-tube longerons. Behind the cabin, which is mounte d as a superstructure on th e I t is interesting to note that this machine con­ forward section, the rear section of the fuselage forms to a considerable extent to th e requirements is on th e Mono-Spar principle, much on th e same of an "ideal " aeroplane for the private owner lines as th e wings, attached to th e front section at tentativel y laid down in a leading article in th e th e point where a series of triangula r tubes, forming issue of AIRCRAFT ENGINEERING for September a rearward extension of th e fron t portion, meet a t a 1930, with the added advantage that it has two vertica l knife-edge. The centra l girder of th e rear engines. portio n thus forks a t its front end t o join the tw o side frames of the front box-girder portion. The Th e Main Plane side members arc tubes, mainly in duralumin, to which th e extremities of the king-post tubes arc Th e Mono-Spar monoplane is a four-seater with attached , the main girder member itself being th e seats arranged in a comfortable completely formed of built-up to p an d botto m channel-section enclosed cabin with glass roof, sides and front from member s connected by vertical an d diagonal struts. which an exceptionally good view—which was on e of the point s stressed in th e leading article referred Th e undercarriage is divided, with a Dowty to—in all directions is obtained. compression leg beneath each end of the centre section. Apar t from the wing-construction, perhaps the chief feature of the machine is th e centre section, Two 75 h.p . seven-cylinder Pobjoy "R " geared which forms a single unit with the engine bearers air-cooled radial engines are fitted, mounted on and undercarriage members. The to p member of each side, above the undercarriage units. The thi s centre-section girder runs through the fuselage fuel tanks, of which there are four, are situated in t o the engine housing on each side. The bottom th e wing in pairs on eac h side, one i n front and one membe r is in three portions: a tube across the behin d the wing-spar, the total capacity being 42 fuselage connecting the bottom longerons, and a gallons. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

An Unconventional Monoplane

Aircraft Engineering and Aerospace Technology , Volume 4 (5): 1 – May 1, 1932
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Emerald Publishing
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Copyright © Emerald Group Publishing Limited
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0002-2667
DOI
10.1108/eb029541
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Abstract

May, 1932 AIRCRAFT ENGINEERING 111 A Low-Wing Four-Seater with Mono-Spar Wings and Fuselage and Tw o Pobjoy Engines N the August, 1929, issue of AIRCRAFT tub e on each side sloping u p a t an angle t o meet th e ENGINEERING appeared the first technical spar fittings a t th e wing roots. Triangular frames I description of his single-spar wing, con­ are formed on each side by strut s between the to p tribute d by Mr. H . J. Stieger himself. The Mono- an d bottom members and, in a horizontal plane, Spar wing ha d the n only just made its appearance, b y two tubes connecting the outer ends of the an d a specimen, showing the principles of the girder to th e botto m fuselage longerons. The outer invention, was the n creating great interest at the sections of th e wings are constructe d on th e familiar Olympia Aero Show, on a stand which was visited Mono-Spar system, illustrated in one of the illus­ by every aeronautical engineer who came to th e tration s reproduced from Mr. Stieger's article in exhibition. The Air Ministry had already shown AIRCRAF T ENGINEERING already referred to. The its interest in th e wing, and official tests carried ou t built-u p steel-girder main-spar is braced on the on an experimental wing to its order were referred king-post system by compression tubes passing to by Mr. Stieger in his article. throug h it at right angles horizontally, from the extremitie s of which swaged rods are take n to th e Soon afterwards, the Mono-Spar Company to p and bottom flanges of the spar. The other Limited was formed and an experimental three- diagra m shows th e ingenious manner in which th e seater machine with two 40 h.p . Salmson engines false spar of th e aileron is used in conjunction with wa s built to th e firm's order b y th e Gloster Aircraft th e main wing-spar to triangulat e th e oute r portion Company. This machine made its appearanc e last of the plane—a method which Mr. Stieger also summer . Meanwhile, as a result of the original forecast in his article . The leadin g edge is a channel- tests , the Air Ministry ordered a wing for the section girder in duralumin bolted to th e compres­ Fokke r VII.3.m machine it possessed, in order sion bracing tubes. tha t a direct comparison of weights with a wing of conventiona l design and construction might be Th e ailerons are built up round deep channel- made . sectioned spars with channel-section ribs at in­ tervals . On March 4, 1931, General Aircraft Ltd. was formed, with Mr. Stieger as chief engineer and designer and joint managing director, to build machines in a factory a t Croydon aerodrome. The Th e Fuselage first of six machines laid down by thi s company is on the point of completion and will shortly be Th e fuselage is in two portions. The front read y to go to Martlesham Heath for its official portion is of shallow section on normal box-girder typ e certificate tests. lines with duralumin-tube longerons. Behind the cabin, which is mounte d as a superstructure on th e I t is interesting to note that this machine con­ forward section, the rear section of the fuselage forms to a considerable extent to th e requirements is on th e Mono-Spar principle, much on th e same of an "ideal " aeroplane for the private owner lines as th e wings, attached to th e front section at tentativel y laid down in a leading article in th e th e point where a series of triangula r tubes, forming issue of AIRCRAFT ENGINEERING for September a rearward extension of th e fron t portion, meet a t a 1930, with the added advantage that it has two vertica l knife-edge. The centra l girder of th e rear engines. portio n thus forks a t its front end t o join the tw o side frames of the front box-girder portion. The Th e Main Plane side members arc tubes, mainly in duralumin, to which th e extremities of the king-post tubes arc Th e Mono-Spar monoplane is a four-seater with attached , the main girder member itself being th e seats arranged in a comfortable completely formed of built-up to p an d botto m channel-section enclosed cabin with glass roof, sides and front from member s connected by vertical an d diagonal struts. which an exceptionally good view—which was on e of the point s stressed in th e leading article referred Th e undercarriage is divided, with a Dowty to—in all directions is obtained. compression leg beneath each end of the centre section. Apar t from the wing-construction, perhaps the chief feature of the machine is th e centre section, Two 75 h.p . seven-cylinder Pobjoy "R " geared which forms a single unit with the engine bearers air-cooled radial engines are fitted, mounted on and undercarriage members. The to p member of each side, above the undercarriage units. The thi s centre-section girder runs through the fuselage fuel tanks, of which there are four, are situated in t o the engine housing on each side. The bottom th e wing in pairs on eac h side, one i n front and one membe r is in three portions: a tube across the behin d the wing-spar, the total capacity being 42 fuselage connecting the bottom longerons, and a gallons.

Journal

Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: May 1, 1932

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