Okay, was working on some detailed .msh for the addon I'm making, but ran into an issue. I didn't know how big a feedline would be. I thought up a way to calculate, but I want to know if it has any faults.
Okay, first stage uses RP-1 (
.806 g/ml)/LOX (
1.141 g/cc).
First stage engine has a Isp of 338 (vacuum) and 309 (sea level) and produces a force of 12400 kN at sea level. So:
Mass flow - 12,400,000/9.81/309 =
4090 kg/s. The engine has a O/F ratio of 1:2.6, so oxidizer flow is
1136 kg/s and fuel flow is
2953 kg/s.
With the given densities of the propellant, this amounts to
3,663,771 cm3/s for RP-1 and
995,617 cm3/s for LOX, using
this calculator.
So using
this calculator, the RP-1 feedline is
0.69 meters in diameter and the LOX feedline is
0.36 m in diameter.
Any thoughts?