Roadster: from physical limits to vehicle engineeringRoadster：从物理极限到整车工程
Read Roadster: from physical limits to vehicle engineering in order, following the questions developed in each installment.按期阅读《Roadster：从物理极限到整车工程》，沿着每一期的问题逐步展开。
- For whom适合谁
- For readers who want to work backward from Roadster's demonstrations to the forces and hardware they require.适合希望从 Roadster 的演示动作出发，反推受力条件与硬件要求的读者。
- Before you begin已有基础
- Newton's laws, energy and power. Each new quantity is introduced with its units and a concrete example.需要牛顿定律、能量与功率的基础；新的物理量随具体算例引入，并交代单位。
- What you can explain读完能解释什么
- The first two installments connect the force budget to the electric drivetrain: distinguish grip, suction and direct thrust, then compare how power, gearing, mass and downforce change acceleration under explicit assumptions.前两期把整车受力接到电驱系统：先区分抓地力、吸附与直接推力，再在明确假设下比较功率、减速比、质量与下压力如何改变加速。
- PART 01第 1 期 ·
Roadster engineering 01: beyond the tyre limitRoadster 技术拆解 01：突破轮胎限制
Start with a target: reach 60 mph in one second. Derive the required force, compare suction with direct thrust, and make each added system justify its power and mass.先定目标：一秒达到 60 mph。反算需要的力，比较负压与直接推力，再检查每一套新增装置能否挣回自己的功耗与重量。
- PART 02第 2 期 ·
Roadster engineering 02: power or grip for a one-second launch?Roadster 技术拆解 02：一秒加速，先补功率还是抓地力？
More power does not always shorten a launch. Compare the target with the force available at each speed, then test power, gearing, mass and downforce changes against the same model.加大功率，不一定缩短起步用时。把目标与不同车速下的可用驱动力放在一起，再用同一个模型比较功率、减速比、质量与下压力的改动。
Planned installments后续规划
- Part 3第 3 期
Make downforce usable at all four tyres让下压力成为四个车轮可用的抓地力
Replace the single friction circle with four contact patches. Examine load transfer, tyre sensitivity, suspension, sealing and the demands of braking and cornering.把一个摩擦圆拆成四个接触区，考察载荷转移、轮胎载荷敏感性、悬架与密封，以及制动和转弯对它们的要求。
- Part 4第 4 期
Buy impulse with a finite gas supply用有限的储气，换取需要的冲量
Work backward from a thrust-time requirement to gas mass, vessels, valves and nozzles, then account for pressure changes and the cost of refilling.从推力与持续时间反推气体质量、储罐、阀门与喷嘴，再计入放气过程的压力变化，以及补气所需的时间和能量。
- Part 5第 5 期
Coordinate force, grip and attitude让驱动、吸附与姿态控制协同工作
Translate a requested motion into actuator commands. Follow sensing, force allocation, delays and fallback when grip or thrust becomes unavailable.把期望运动分解成执行器指令，沿状态估计、受力分配、响应延迟和故障降级，解释控制系统如何应对抓地力或推力的变化。
- Part 6第 6 期
Make peak performance repeatable让峰值性能成为可重复的能力
Run the whole cycle: prepare, launch, brake and recover. Combine heat, gas, mass and durability budgets to judge what can be repeated, tested and manufactured.串起准备、起步、制动与恢复，合并热量、储气、质量和耐久预算，判断性能能否重复、如何验证，以及制造需要满足什么条件。