FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1917
1917 - 1123.PDF
OCTOBER 25, 1917. The Burchall Monoplane.ONB of the most enthusiastic members of the Finsbury Park and District Model Aero Club is Mr. C. J. Burchall,and many model makers will doubtless be interested in the following description and the drawings of one of his verysuccessful models. The main plane, it will be seen, has a span of 49 ins., butthe leading edge is only 44 J ins,; the chord is 5 ins. at the centre and 6J ins. at the ends. For the front and back of the plane£ by $ birch, with one edge rounded off, is used, while the ribs are also of birch, • in. by Tlg in- in section. One of thesketches shows the way in which each rib is fastened at the front and back by little angle plates of aluminium or tin,bound with cotton well saturated with seccotine or liquid glue. In order to assist the main planes to maintain theirshape a strip of wood T ]j in. thick is let into the tops of the ribs; each joint should be smoothed down flush, and thebottom edges should be rounded off to lessen resistance. It should be fastened in place with glue and cotton. Whenthe framework is complete, the spaces along the main spars between the ribs are filed awav to the dotted line shown in The tail is made of 20 gauge steel piano wire with the joints'bound with fine iron wire and soldered, the ribs are attached in the same way.One of the sketches shows how the tail is clipped between two pieces of birch TB, in. by •& in., the ends of which arelashed to the rear of the body—which is cut away to take them—by glue-soaked cotton. The fin or rudder is madein a similar way to the tail, anc' it is lashed by the two hooks to the top piece of birch. Both the tail and fin are coveredwith the same material as the main plane. The chassis is made of 18 gauge wire, and its shape isclearly shown in the drawing. The joints are made as in the tail. It is hinged in front by a strip of aluminium bent doublewhich is lashed to the body at the same time as the bearing which carries the propeller. At the back, the wire is formedinto a hook which slips into a loop, and permits of a shock- absorber effect being obtained should the model make abad landing! The wheels are made of two pieces of mahogany with the grain at right angles. They are shaped as shown andglued together. The hub is formed of a piece of brass bye- pass tubing, and a washer is soldered on each side. Front Vieur 0/chassis Length o/'Sady J6"i •Depth 1 ~m Attachment forChasus dt "ET fi Fm to bogy H H S H H E EH H SI H a 0 Plans and details of Mr. C.J. Bur- chall's mono- plane. H El E 0 0 E 0 El H B H H El 0 0 0 H 0 H H H the section. The plane is then covered with proofed silk,stretched tightly from the centre to the end of the plane. • • The backbone of the model is made from two pieces ofsatin walnut, 3 ft. long by 1 in. by \- in. ; they are clamped together and first shaped from an oval section in the centreto a smaller oval at the front and a circular end, then after being hollowed out as much as possible they are glued togetherand well clamped up between two boards until the joints are set. The outside can then be sandpapered and finished. The saddle piece is carved out to carry the plane, and on tothis is fixed a boxwood guide for the rubber to run through apd keep it clear of the plane, the forked ends of this fittingare glued to the saddle. The propeller, to Mr. Burchall's own design, which hasproved successful not only on his own model but on those of other members of the club, is carved from satin walnut£ in. thick. It is 14 ins. in diameter, and is of compound pitch.The model weighs 6 ozs. complete, carrying six strands of A. E. Jones rubber, weighing J oz. With 600 turns of thepropeller the model has flown well over 400 yards. Probably some of our readers may care to build a similarmodel, and should experience no difficulty after studying the drawings and sketches. In conclusion, it may be pointed outthat all the materials used were obtained from Messrs. A. E. Jones, Ltd. "A* -
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
