CONTENTS xiii 



CHAPTER XXI. 



PAGE 



WATER PERFORMANCE 179 



Condition for getting off. 



CHAPTER XXII. 

 A TYPICAL MACHINE 182 



General Body resistance Wing characteristics Propeller per- 

 formance curves Machine performance curve Ceiling Speed 

 range at altitudes Climb Times to altitudes Best cruising 

 altitude against a twenty-mile wind Cruising range at 6000 feet 

 against a twenty-mile wind. 



INDEX . . 205 



