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A four bottom 40 cm MB plough has a working depth of 15 cm and draft of 1600 kg. It is working at a speed of 15 cm and draft of 1600 kg. it is working at a speed of 4.5 km/hr with field efficiency of 70%. What will be the drawbar power?

(a) 14.9 KW

(b) 19.6 KW

(c) 18.7 KW

(d) 17.6 KW

This question was posed to me in class test.

The above asked question is from Numericals on Mouldboard Plough in chapter Tillage, Disc Plough & Numericals of Farm Machinery

1 Answer

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Best answer
Right option is (b) 19.6 KW

For explanation I would say: Total furrow cross section = 4*40*15 = 2400 cm^2

Unit draft = 1600/2400 = 0.66 kg/cm^2

Drawbar power = \(\frac{Draft*speed}{1000} = \frac{1600*9.8*4.5*1000}{1000*60*60}\) = 19.6KW.

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