Could someone do a calculation for me? and maybe show me how?

[ohlookabirdie]

the calculation that i want done is this:

how much fuel do 8 LV-1R engines need to burn for exactly the same length of time (at full throttle) as one RT-10 solid booster.

and the same question but for 8 Rockomax 24-77 engines.

I would love to know how to work this out for myself, so if you could show me your working, and what equations you used that would be great

[Taki117]

It seems like a simple fuel flow rate problem.

From the Wiki :

Fuel con.sumption (LV-1R) (1 atm) 0.37 l/s

(vacuum) 0.28 l/s

I'm going to round to .35 for the purposes of this calculation. Meaning that 8 LV-1Rs uses about 2.8 l/s

The Fuel consumption for an RT-10 is (1 atm) 15.09 l/s

(vacuum) 14.14 l/s

Again, I'm going to round to 14.5 l/s The Burn time for the RT-10 is (1 atm) 28.7 s Or about 29 sec.

(vacuum) 30.6 s

So, our 8 LV-1Rs need about 28 units of Liquid Fuel, and an appropriate amount of Oxidizer, but for what it's worth you might as well just reduce the thrust of the RT-10.

[PlonioFludrasco]

Fuel flux x time, but remember that the flux is not exactly constant, and if you want more accurate results, do:

Solid fuel mass / solid fuel flux = SRB time

SRB time = LFE(liquid fuel engine) time

LF/OX mass (total!!) = fuel flux x LFE time

Cheers!!

[FleshJeb]

And in case it matters to you: 11 units of oxidizer per 9 units of fuel

http://wiki.kerbalspaceprogram.com/wiki/Liquid_fuel