Subtopic: Power efficiencies and measurement, engine performance curves
Question Statement:
A tractor diesel engine develops a rated torque of $T_{\text{rated}} = 195.3\text{ N}\cdot\text{m}$ at rated engine speed of $2200\text{ rpm}$. When pulled down under heavy drawbar load, the engine develops its peak maximum torque of $T_{\max} = 238.5\text{ N}\cdot\text{m}$ at $1400\text{ rpm}$. The torque reserve percentage ($TR = \frac{T_{\max} - T_{\text{rated}}}{T_{\text{rated}}} \times 100$) of the engine is ________ (round off to 1 decimal place).