What is the appropriate thrust-to-weight ratio for a car?
2 Answers
Car engine thrust-to-weight ratio is appropriate in the range of 4 to 6. Below are the specific details about thrust-to-weight ratio: 1. Calculation formula: Thrust-to-weight ratio equals driving force divided by the total vehicle mass, which is one of the important performance indicators of an engine. 2. Concept: The engine thrust-to-weight ratio refers to the ratio of the thrust generated by the engine at its maximum operating state under standard atmospheric and stationary conditions to its structural weight. It is an important indicator for measuring engine performance and a comprehensive indicator for evaluating the design, materials, and manufacturing process level of the engine. A higher thrust-to-weight ratio indicates that the car can accept more horsepower per unit weight, resulting in better dynamic performance.
As a frequent driver, I believe the power-to-weight ratio of a car usually refers to the horsepower per ton. For ordinary family cars, a range between 10 to 15 is the most comfortable. For example, my old car has about 9 horsepower per ton, providing smooth acceleration during city commutes and good fuel efficiency. If the ratio is too low, say below 5, the car accelerates like a snail; if it's too high, like above 20, the car jerks forward with a light press on the accelerator, consuming more fuel and being harder to control. For economy cars, 7 to 10 is sufficient, while SUVs need a slightly higher range of 11 to 14 to ensure load capacity. Driving safety is the most important—don’t just chase numbers. When choosing a car, consider weight distribution and road conditions. Mountainous areas require stronger power, while flat regions are fine with a moderate ratio.
