When you have a week to spare try reading this.
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Good find, basically it is one of many write ups of ongoing research at the time about how to improve the efficiency of a pump.
Shame there was no mention of the Perkins TS2 horizontally opposed two stroke diesel engine as a comparison.
Edit:- to make my reply make sense and readable, my excuse is I was a little light headed to be posting so soon after reading the article.
assumption is the mother of all f*** ups.
for that mate old stuff but good stuff