Ten megawatt price is the cost of a pump with a power of ten megawatts. The gold plated cost is for a custom built, temperamental, no expense spared bureacratic monstrosity, like the space shuttle main engine turbopump. The inexpensive cost is for an off the shelf, mass produced pump. The baseline power density for cost calculations is one hundred and sixty thousand watts per kilogram, which is the power density of the space shuttle main engine turbopumps.

Rocket pumps are about as sophisticed as aircraft turboprops; but, are far more expensive because they're manufactured in tiny quantities. A ten megawatt pump will give a pressure boost of seventy atmospheres in a three hundred ton rocket. The ten megawatt price is used along with pump density scale, pump power, pump power density and structure mass to calculate the pump cost.

pump cost = pow( ( pump power density / 160,000 ), pump density scale ) * pow( ( pump power / 10,000,000 ), structure mass scale ) * ten megawatt price
 
 

This is used in rocket cost.
 
 

Feedback   Free Electronic Nation Home    Rocket   GNU Free Documentation License