worked out, but and used Breguet-Laval turbines that were very troublesome and caused Léopard to be enter service two years late. The turbines were designed to produce , which would propel the ships at . During their sea trials, the turbines generated and they reached a maximum speed of for a single hour. The ships carried of fuel oil which gave them a range of at . Fuel consumption at high speeds was excessive and the range was only at . The ships were fitted with two turbo generators in the forward engine room. In addition, two diesel generators, one of and the other of capacity, were located in the central superstructure. Armament The main armament of the Chacal-class ships was originally intended to be mounted in a mix of single and twin mounts, but the twin-gun mounts proved unsatisfactory so the ships were armed with five 40-caliber Canon de 130 mm mle 1919 guns in single mounts, one superfiring pair each fore and aft of the superstructure and the fifth gun abaft the aft funnel. The guns were numbered '1' to '5' from front to rear. The mounts had a range of elevation from -10° to +36°, which gave the gun a range of at maximum elevation, and the guns could be loaded at any angle below +16°. They fired armor-piercing projectiles at a muzzle velocity of at a rate of five to six rounds per minute. The fore and aft magazines had a total capacity of 802 shells. Each mount had a ready rack holding 24 shells, except for No. 3, which had a larger supply of 30 rounds because it lacked an ammunition hoist down to the magazines. The NGS deemed this gun obsolete shortly after the first ships were laid down, but the gun that it wanted to use, the Canon de 138 mm modèle 1923, was not yet available, so they planned to replace the 130 mm guns later. The guns and their larger hoists were ordered well before any of the ships were completed and had to be written off when it became apparent that the ships' stability was too marginal to tolerate the additional top weight. The initial plan was to fit each ship with a director that fed data to the Mle 1923B electro-mechanical fire-control computer, but development was protracted and it was not ready in time for the first four ships.