Close subsequent _exemination showed that the sleeves, which are made of special metal, were not worn. El consumption—and those motorists who. remember how sleeve-valved engines in motor cars used to drink all after a few thousand miles will be astonished to read th steadily asthe hours Aquila sleeve-valved engines were in Stalled for endurance testing in Bull-ind Bullpup single.seat fighter biplanes. The engines were run for ong periods at full throttle and high output to discover any weakness in design or construction. Subsequent scrutiny of every part showed that the general condition of the engines was excellent.
Text read from the printed page and cleaned; old type leaves the occasional error.