A Pound of Retention
RAY: Sometime in the late 1930s, German and perhaps other countries' aeronautical engineers were working on a device which did the following: It took water vapor, which is one of the products of gasoline engine combustion, and would condense it into water and save it.
“Not such a big deal,” you say. Well, it would save it in an interesting way. It would save it in such a way that the amount of water saved would be exactly the equivalent in weight to the amount of fuel that the engine burned. So as the engine burned a pound of fuel it would save a pound of water and discard the rest. Why would you want to do this?
Think you know? Drop Ray a note!
[ Car Talk Puzzler ]