The arms of this triangle are bent inwards, and the two ends, carefully aligned to one another, make the axle which works in the metal straps. These latter straps are placed against the holes of the bolts and marked off, taking great care that the rudder post is carefully aligned on the stern post. It is separated from the latter at the lower end by 40 mm. to 50 mm. and at the upper end by 10 mm. to 15 mm.
An opening cut in the sides gives access to the nuts of the bolts which fix a 2-mm. plate of steel on to the piece of hard wood. Little pieces of aluminium sheeting .6 mm. in thickness, and some wood screws, close these openings.
The T holds the eye between metal and rubber washers, which are held from moving by the two bolts which join the T to the rudder post. The rudder post is fastened to the rudder by the aid, of four strips of 2-mm. metal which are bolted to it. At the spot where the bolts will pierce the rudder post, one will have strengthened it with a filling of hard wood, greased with wax or paraffin. The washers of metal and of rubber absorb the shock of the straps on the collar.
The metal strips are also fixed on to a tube of 24 mm. length by a bolt. A rudder shock absorber of 12-mm. section, 500 mm. long, joins the rudder post to the base of the stern post, passes under a metal fitting, and is fixed by a plate and two big wood screws. The two ends of this shock absorber are pushed inside the fuselage through a 30-mm. hole cut in the bottom at a distance of 100 mm. from the stern post.
It is lightly stretched in such a manner that the weight of 30 kilos. placed on the fuselage begins to make the metal straps move.
The rudder post of 24 mm. diameter is pushed into the T of 24 mm. x27 mm. section. Make this a good fit by smoothing up with a file and emery cloth the en the tube; the fit should be a close one. The two bolts will keep the one from turning the other.
The tube in 21 mm. x 24 mm. material is welded square on the tube. Two rivets of 4 mm. fix the axle in the tube. These rivets will be flush with the tube.The wheels are made out of two discs in 1.5 mm. material, which are embossed by a hammer, and joined along their circumference by twelve rivets of 4 mm., taking care that they are properly centred on the tube.
You can do this quite easily by hammering a sheet 200 mm. x 200 mm. on a piece of wood which has been hollowed out, using a round-faced hammer. After have hammered out the material, you can then describe a circle.The tube, with its ends slightly flared by hammering with little blows on the top of an anvil, goes through the middle of the wheel, and then one flares the other end in the same way. It would be a very good thing to weld all this together.