Value of Octane Numbers in Flying 370173

THIS paper represents an attempt to illustrate the values of octane-number improvements in aviation gasolines in terms of increased earning power of current-type transport airplanes when proper provisions have been made in the original designs. The procedure consists in computing the change in earning power of a gallon of gasoline when octane-number changes are reflected in altered fuel consumptions or take-off load capacities. In general it appears that:
  1. (1)
    Depending upon operating conditions the potential revenue earning power of one gallon of gasoline may be increased from 2 to 8 cents per octane-number improvement.
  2. (2)
    If the octane-number improvement involves a decrease in energy content, the apparent improvement must be discounted by about 2 octane numbers for each reduction of 1 per cent in heat content below that of gasoline.
  3. (3)
    The economic necessity for high-octane number fuels is particularly apparent when long-range operations are involved.
  4. (4)
    It is evident that the earning power of octane-number improvements is so great that, within practical limits, cost cannot influence the trend toward higher octane numbers to any appreciable extent.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.