42 L. HARGRAVE. 
The feed pump is the exact thing required. There is a pestle 
shaped knob on the lower end of the pump rod. This works in 4 
cup at the bottom of the hollow pump ram. The ram is held 
against the pump rod by two springs. When the fire is fairly 
lighted and the pump crank on the top centre, the ram can be. 
worked by hand till the engine starts. 
The following table shows the approximate capabilities of No. | 
21 motor. The revolutions are only recorded when the engi’ 
causes sufficient vibration to give a tremor to the pen of the : 
chronograph. 
Results of some of the Trials of No. 21 Motor. 
3 ae 7 eo 
Pa eee ae Na: . | 26 pa 
Sal ai] 2 12 | aa S| 584| 
3 g soe . Sg 523 Screw Propellers. 2 23 3 : 
gz| 22 | BS | 83 | Bee 3 | geo) 
Z| oa OF Gn | 46a Pant eS 
2| 1°78 | 10°81 80 “4 Twin screws 39° e 
3 | 173 5 95 "5 Twin screws ... ro OO fe 
4| 2 11245 | 128 5 Twin screws ... | 30° 
5 | 26 | 11:245 | 107 | -75 Single screw, 31” diam.) 30° 
6 | 26 | 11-687 | 100 ‘625 |Single screw, 31” diam.| 30° 
| 7| 26 | 1884 |145 | 1-0  |Single screw, 31” diam.| 30°; 300 | 
8| 26 | 1557 | 130 | -64 [Single screw, 27” diam.| 39°} 329 | 
10| 26 | 12°64 85 fi Single screw, 34” diam.| 36° 300 
11| 26 | 908 | 66 | 15 — |Single screw, 34” diam.| 30° 7 
12| 26 | 144 | 106 | +75 [Single screw, 34” diam. 30°| 30 | 
The experiments are now being carried out at Stanwell Park, . 
situated about thirty-two miles south of Sydney. This somewhat : 
isolated locality is favourable for kite flying when the wind is 
from the eastward, between S.S.E. and E.N.E. In spite of 
unavoidable delay and interruptions some progress has been made. 
The kites are expected to provide a handy means of lifting the 
experimenter and flying machine from the ground, and to afford 
a safe and easy descent. : 
The cellular kite is the germ that has been modified amd 
developed, and in all probability it wili prove to be the permane™™ 
