CHAPTER VIII.

HINTS ON THE BUILDING OF MODEL AEROPLANES.

§ 1. The chief difficulty to overcome. § 2. General design--The principle of continuity. § 3. Simple monoplane. § 4. Importance of soldering. § 5. Things to avoid. § 6. Aerofoil of metal--wood--or fabric. § 7. Shape of aerofoil. § 8. How to camber an aerocurve without ribs. § 9. Flexible joints. § 10. Single surfaces. § 11. The rod or tube carrying the rubber motor. § 12. Position of the rubber. § 13. The position of the centre of pressure. § 14. Elevators and tails. § 15. Skids _versus_ wheels--Materials for skids. § 16. Shock absorbers, how to attach--Relation between the "gap" and the "chord" 93