Subtopic: Hitch systems and hitching of tillage implements
Question Statement:
A trailed subsoiler requires a horizontal draft of $P = 15\text{ kN}$. The hitch point on the tractor drawbar is located at a height of $h = 40\text{ cm}$ above ground. The tractor wheelbase is $L = 2.20\text{ m}$. Assuming the line of draft is horizontal, the dynamic weight transferred from the front axle to the rear axle due to this drawbar pull in $\text{kN}$ is ________ (round off to 2 decimal places).
Answer Key:
2.73
Step-by-Step Solution & Explanation
Dynamic weight transfer $\Delta W$ from front to rear axle due to a horizontal drawbar pull $P$ at height $h$ with wheelbase $L$ is:
$\Delta W = \frac{P \times h}{L}$
Given $P = 15\text{ kN}$, $h = 0.40\text{ m}$, and $L = 2.20\text{ m}$:
$\Delta W = \frac{15 \times 0.40}{2.20} = \frac{6.0}{2.20} \approx 2.727\text{ kN} \approx 2.73\text{ kN}$