> ...
>> > Nothing is going to ignite until it is gas; that's what the intake
>> > and compression strokes are for.
>
>> ummmm.... no, the intake stroke is to pull the air into the
>> cylinder. the compression stroke is to generate compression. you're
>> right that nothing will ignite in liquid form, however, atomising
>> liquids into hot cylinders tends to liquefy them rather quickly.
>
> Most of the fuel vaporization takes place during the intake stroke.
>
> The compression stroke is to get the piston back to the top so the
> ignition has something usefull to do.
>
> Squirting LOX into a cylinder will tend to cool everything off
> rather quickly, and perhaps too quickly.
This one's better:
formatting link
Cheers! Rich