CHAPTER X.

THE LAUNCHING OF THE MODEL.

§ 1. The direction in which to launch them. § 2. The velocity--wooden aerofoils and fabric-covered aerofoils--Poynter's launching apparatus. § 3. The launching of very light models. § 4. Large size and power-driven models. § 5. Models designed to rise from the ground--Paulhan's prize model. § 6. The setting of the elevator. § 7. The most suitable propeller for this form of model. § 8. Professor Kress' method of launching. § 9. How to launch a twin screw model. § 10. A prior revolution of the propellers. § 11. The best angle at which to launch a model 109