than the earlier ship. Suffren was fitted with bilge keels to reduce her rolling. Her crew numbered 31 officers and 637 men as a private ship and 42 officers and 700 sailors as a flagship. Propulsion Suffren was powered by three Indret vertical triple-expansion steam engines, each driving one propeller shaft. The centre shaft drove a three-bladed screw propeller and the wing propellers were four-bladed; each was in diameter. The engines used steam provided by 24 Niclausse boilers at a working pressure of . Rated at a total of , the engines were intended to give the ship a speed of . During her sea trials on 12 November 1903, they produced and gave a top speed of . The ship carried a maximum of of coal which allowed her to steam for at a speed of . Suffren carried of fuel oil to be sprayed on the coal to improve its burn rate. The ship's 80-volt electrical power was provided by two 600-ampere and three 1,200-ampere dynamos. Armament Like Iéna, Suffren carried her main armament of four 40-calibre Canon de Modèle 1893/96 guns in two twin-gun turrets, one each fore and aft of the superstructure. The turrets were traversed by electric motors, but were elevated and depressed by hand. The guns were loaded at an angle of −5° and they had a maximum elevation of +15°. They fired armour-piercing projectiles at the rate of roughly one round per minute. They had a muzzle velocity of which gave a range of at maximum elevation. Suffren carried 60 shells for each gun with each turret holding ready-use racks for 22 projectiles. The ship's secondary armament consisted of ten 45-calibre Canon de Modèle 1893/96 guns. Six of these were mounted in single-gun turrets on each side of the superstructure and the remaining four guns were positioned below them on the upper deck in individual casemates that were sponsoned out over the tumblehome of the sides. The guns fired shells at a muzzle velocity of to a maximum range of . Their theoretical rate of fire was between two and three rounds per minute. Suffren carried 200 shells for each gun. She also carried eight 45-calibre Canon de Modèle 1893 guns in shielded mounts on the shelter deck and on the superstructure. These guns fired a projectile at , which could be elevated up to +20° for a maximum range of . Their