function WrightAI::GetEngineDaysInTransit(engine_id, fakedist)
{
    local days_in_transit = (fakedist * 256 * 16) / (2 * 74 * AIEngine.GetMaxSpeed(engine_id));
	return days_in_transit;
}

function WrightAI::GetEngineRouteIncome(engine_id, cargo, fakedist) {
    local running_cost = AIEngine.GetRunningCost(engine_id);
	local capacity = AIEngine.GetCapacity(engine_id);
	local days_in_transit = WrightAI.GetEngineDaysInTransit(engine_id, fakedist);
	local income = capacity * AICargo.GetCargoIncome(cargo, fakedist, days_in_transit) - running_cost * days_in_transit / 365;
	return income;
}