Δv计算器 — 公式
## The Tsiolkovsky Rocket Equation
**dv = v_e * ln(m0 / mf)**
- *v_e* = effective exhaust velocity (or Isp × g0)
- *m0* = initial mass with propellant
- *mf* = final mass after burn
- *ln* = natural logarithm
The mass ratio m0/mf determines how much velocity change is possible.
**dv = v_e * ln(m0 / mf)**
- *v_e* = effective exhaust velocity (or Isp × g0)
- *m0* = initial mass with propellant
- *mf* = final mass after burn
- *ln* = natural logarithm
The mass ratio m0/mf determines how much velocity change is possible.
计算示例
A stage: v_e = 3000 m/s, wet mass 100 000 kg, dry mass 10 000 kg.
- dv = v_e × ln(m0 / mf)
- Mass ratio = 100000 / 10000 = 10
- ln(10) ≈ 2.3026
- dv = 3000 × 2.3026 ≈ 6 908 m/s