hyper engine
...that the hyper engine was a hypothetical aircraft engine design meant to deliver 1 horsepower from 1 cubic inch of displacement?
...that the <b id="mwAV4"><a href="./Hyper_engine" id="mwAV8" rel="mw:WikiLink" title="Hyper engine">hyper engine</a></b> was a hypothetical <a href="./Aircraft_engine" id="mwAWA" rel="mw:WikiLink" title="Aircraft engine">aircraft engine</a> design meant to deliver 1 <a href="./Horsepower" id="mwAWE" rel="mw:WikiLink" title="Horsepower">horsepower</a> from 1 cubic inch of <a class="mw-disambig" href="./Displacement" id="mwAWI" rel="mw:WikiLink" title="Displacement">displacement</a>?