A tractor of 19.5 kN weight and 1.8 m wheel base has 70% static weight on the rear axle. It pulls 8 kN drawbar load parallel to the ground through a hitch point located 450 mm above the ground. The dynamic weight on the rear axle of the tractor under operating condition in kN will be __________.
Official Answer Key:
15 to 17
Step-by-Step Solution & Explanation
• Static rear-axle weight = 0.70 × 19.5 = 13.65 kN.
• A drawbar pull acting parallel to the ground at a hitch height h above ground transfers weight from the front axle to the rear axle: ΔW = (Pull × h)/wheelbase = (8 × 0.45)/1.8 = 3.6/1.8 = 2.0 kN.
• Dynamic rear-axle weight = static rear weight + weight transfer = 13.65 + 2.0 = 15.65 kN, inside the accepted range 15–17.
Section 4 — Soil and Water Conservation Engineering
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