Regarding your question of June 4th @ at 10.37 a.m.
''Why are all engines shown in cubic inches? Wouldn't it be more sensible to calculate them in fluid ounces?''
Jeb, I can't catch your drift as to what you mean by ''more sensible.'' Most folks would assume that a fluid ounce is used to measure out liquids.
The size of an engine is based on its' explosive gas container size. That gas is explosive because it is air saturated with gasoline.
Obviously there is no objection to measuring either gases or bulks in fluid ounces. But most folks use fluid ounces, fluid pints, or some fluid measure to measure liquids. And most folks use dry pints, dry gallons, or some dry measure to measure bulks. So, most folks use cubic inches, cubic feet, or some cubic measure of linear measure to measure gases.
Jeb, utility companies that run gas pipes to properties, sell their gas by the cu.' to the customer, because it is a gas.
The entire world uses the cu.' for the sale of all gas, because that is the unit used by the Gas, Light, & Coke Co., in 1812 in the first sale of gas to the public in the Town of Westminster, South Britain, United Kingdom.
Jeb, filling stations sell their gasoline by the fl.gal. to the customer, because it is a liquid.