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July 12.
Nothing has happened of note during the past few days. My engine developed a disquieting knock and its vibration was suggestive of a threat to shake my Spad to pieces so I went over it with the mechanics and found enough to order a new power plant installed. As the Engineering Officer of the squadron remarked, "You might fly a lot of hours with the bus but any ill moment a connecting rod might go through the crank case and quit with a jiffy's notice" It [[underline]] would [[/underline]] be rather inconvenient to have that happen while chasing a Bosche on a glide behind his own lines.
The 180 HP Hispano Suiza is a powerful brute and it fits into the Spad with a snugness that suggests the care in its design.

Transcription Notes:
confirmed Spad a type of ww1 aircraft confirmed Hispano Suiza a type of engine used in SPAD aircraft