The hyper engine was a NUMBER@1 study project of the ORGANIZATION@1 , an effort to develop an aircraft engine capable of delivering NUMBER@2 horsepower per cubic inch -LRB- NUMBER@3 kW/L -RRB- of engine displacement .

The hyper engine was a possible aircraft engine model that could produce NUMBER@2 horsepower per cubic inch of engine displacement . The term hyper engine was used only in the LOCATION@1 , where the ORGANIZATION@2 gave people money to make a hyper engine that had an area of NUMBER@4 cubic inches .
