Combustion efficiency is the part of the reactants that combine chemically. Combustion efficiency increases with increasing temperature of the reactants, increasing time that the reactants are in contact, increasing vapor pressures, increasing surface areas, increasing stored chemical energy and better catalysts. One way of increasing the temperature of the reactants and their vapor pressures is to preheat them by circulating them around the combustion chamber and throat before being injected into the combustion chamber. Quadricyclene and ozone have high stored chemical energy. In the case of ozone this might be too much, if so maybe one third ozone, two thirds oxygen could be used. Given the combustion efficiency, fuel molar ratio and mixture the amount of unreacted fuel can be calculated.

fuel molar ratio = 1.0 - mixture
mixture oxidizer mix = 1.0 + mixture

unreacted fuel = 0.0
if ( fuel molar ratio > mixture oxidizer mix ) {
    unreacted fuel = fuel molar ratio - mixture oxidizer mix
}

If the combustion isn't ideal:

if ( combustion efficiency < 1.0 ) {

Then the quadratic equation is used to determine the part of each reactant that combines chemically:

    ratio = 9999999.9
    if ( fuel molar ratio != 0.0 ) {
    ratio = mixture oxidizer mix / fuel molar ratio
    }
    unreactability = 1.0 / ( 1.0 - combustion efficiency )
    a = 2 * unreactability * unreactability
    b = a * ( ratio - 1.0 )
    c = ratio + 1.0
    unreacted = 0.5 / a * ( sqrt( b * b + 4.0 * a * c ) - b )
    unreacted fuel = fuel molar ratio * unreacted
}
 
 

This is used in astropolis.html, bipropellantrocket, tripropellant rocket, pumped rocket and rocket cost.
 
 

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