Did Bristol's aircraft-engine line start with the Jupiter?
Short answerThe Jupiter entered service first, but development work on the smaller Cherub had begun earlier.
NotesAn audience member asks whether Bristol's engine history began with the Jupiter. The two-cylinder, 32-horsepower Cherub was the earlier project, but a check of the notes clarifies that the Jupiter entered aircraft service sooner even though work on the Cherub had started earlier. The distinction shows why an engine family's first development effort and its first operationally visible product need not be the same machine.