NEWNES PRACTICAL MECHANICS
Damp the longerons with a piece of rag soaked in water over one metre's length for ten minutes starting from the rear point. Join them together in a point with a wood screw of 4 x 40, with a countersunk head, taking care to interpose at 440 mm. from the back a piece of 20 mm. x 20 mm. x 410 mm. Place into position the planking of the tool chest, and also two stops of hard wood fixed by two screws of 4 mm. x 40 mm. with round heads, spaced at 40 mm., supported on the inside with plates of 3-ply of 3 mm. with the grain running vertical.
Cut out the two metal pieces in mild steel of 1 mm., which will be bent. One will do to fix to the rear points, by means of screws with round heads 4 mm. x 15 mm and the other to the stem post made of hard wood 15 mm. x 40 mm. x 450 mm.
Place on the back piece the laths (Fig. 11), then the longerons, which are fixed on in front by two gussets, and joined together in the rear by a screw, with the crossbar of 410 mm.as for the lower point. The second piece of metalwork will join them on to the stern post.
During this work take care that the stern post is not out of line with the fuselage. Plane it and file it until it is exactly vertical with the fuselage. The upper crossbar is fixed on to the longerons by two gussets at 350 mm from the bar.
In addition, this crossbar carries a piece of hard wood, screwed and glued. The whole is pierced with a hole of 7 mm. Carry on in a like manner with the cross piece, which carries a piece pierced with two holes of 6 mm., spaced 40 mm. apart. Place in and glue into position the bulk head furnished with laths. Bevel off with a file the plywood on the sides, following the shading so that you can apply over it, without getting the extra thickness, the plywood sides of the rear of the body, which will be at this spot similarly bevelled. With the help of several nails apply a piece of 3-ply on each side. Mark it off, out off and. nail it after having glued it everywhere. When you are gluing on the second panel, see that the stern post is kept quite straight. After it is dry, finish off all the rough edges nicely with a plane or file. The construction then appears as in Fig. 11.
You can close up the box by the lid which is pierced with a 7 mm. hole. Take the screws out of the rear blocks and mark their places exactly on the sides. Now lace the bottom of the box into place and pierce with holes right up to the seat.
The piece of 3mm. plywood which will form the base between the crossbars can be made ready, and will be placed in position later. The fuselage is now finished, It weighs 156 kilos.
The Landing gear.
The rear end of the longerons is joined by a metal strap, 2-mm. material, by three screwed rods (Fig. 14) of 5-mm. metal.
The pivot post of the rudder is of mild steel tubing. It turns freely with a play of 1 mm. in the metal strap which is closed by a little tube, 24-mm. material, fastened by a bolt. This tube is obtained by rolling in the vice a piece of material of 2 mm. around a rod of 6 mm.
The other end of the rudder post is inserted into a T, which carries the small axle for the wheels (Fig. 16). This T turns (with a play of 1mm.) diameter , heated to red heat and bent into an eye., or welded with the bar.