CHAPTER III.

THE QUESTION OF BALANCE.

§ 1. automatic stability essential in a flying model. § 2. theoretical researches on this question. §§ 3-6. a brief summary of the chief conclusions arrived at--remarks on and deductions from the same--conditions for automatic stability. § 7. theory and practice--stringfellow--pénaud--tatin--the question of fins--clarke's models--some further considerations. § 8. longitudinal stability. § 9. transverse stability. § 10. the dihedral angle. § 11. different forms of the latter. § 12. the "upturned" tip. § 13. the most efficient section 13