118 



COMBINED PORTABLE ENGINE 



Fig. 78 represents a stationary winding drum with a small 

 drum for the return cable (Pelous). The shaft of the pulley 

 bears a bevel pinion, gearing with a bevel cog-wheel on a 

 vertical shaft, bearing a double cog-wheel which may be 

 alternately thrown into gear with either drum by means of 

 a lever. 



Fig. 78. Pelous' Capstan with Drum for the Return Cable. 



With a Beauquesne simple winding drum, as worked with 

 an 8 H.P. portable engine at Mr. DeltiPs property at Saint- 

 Sulpice-de-la-Pointe (Tarn)*, the work practically done has 

 been 3 furrows 219 yards in length, 19 J inches in depth, and 

 27 J inches in width per hour, i.e., 16*8 poles per hour. 



From many observations we may admit in practice the 

 following figures relative to the analysis of a day's work : 



Ratio. 



27 per cent., meals and rest... ... 43-4 



11 per cent., anchoring and ordinary 



stoppages during work ... ... 17*7 



62 per cent, useful work (ploughing and 



hauling back) ... ... 10OO 



We may compare simple effect against double effect winding 

 drums, working a balance plough backwards and forwards, 



* Journal (V Agriculture Pratique, 1889, vol. 1., p. 578. 



