tissue will be good for covering. Cover the underside of the two planes, and the underside of the triangular framework which is similar to the hull of a boat, and acts as a keel. Test out well as a glider. Put more and less curve to bows, and experiment for poise of model. A small piece of tin on each side of the support will give a good bearing for the propeller shaft. The hole in the wood should be a trifle larger than the shaft. String is run from both ends of d and e to the front end of the framework but is not attachedto f.
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Fig. 229.
When long models are made with single spine, they need some simple wire supports to prevent springing up or down, and from left to right. Fig. 229 is 4′ long and the spine is only 14″×14″ at the small end 14″×38″ at the larger end. A little 116″ oak veneer cut in strips 316″ wide would be very serviceable for the purpose of support in trussing the long spine. It should stand 2″ above and below the spine, and the same amount for the right and left brace, Fig. 230. The wires for these should extend about a foot on each side of these posts, and be attached to the spine with little tin anchors, as shown in Fig. 230, a.
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Figs. 230, 231, 232.