For this purpose, Junon's hull was given a "fish-like" shape, with a wide beam at the bow of the ship, and a tighter aft.

The design proved to provide poor sailing qualities: Junon had to be weighted with iron ingots for her stability, and lost six 18-pounders of her lower battery and several guns of her upper gundeck.

[1] In 1752, she departed Toulon for a campaign off Tripoli, under Captain du Revest.

[1] In 1756, she took part in the Battle of Minorca under Captain Beaussier de la Chaulame.

[1] In January 1757, Junon sustained serious accidental damage in Port Mahon, and was used as a hulk there.