100 mm/45 (3.9") Models 1891, 1892, 1893, 1897, and 1917

These older guns differed from later versions in that they fired separate rather than fixed ammunition. Performance of all these guns was similar. SAP projectiles weighed 35.3 lbs. (16.0 kg) and had a muzzle velocity of 2,306 fps (703 mps). Guns reworked for various reasons before World War II had "T" suffixes added to their designations.

In the late 1930s, a shortage of new 100 mm (3.9") guns forced the re-use of these old guns on smaller warships.

100 mm/26 (3.9") Model 1892

Actual bore length was 26.2 calibers. SAP projectiles weighed 35.3 lbs. (16.0 kg) and had a muzzle velocity of 1,673 fps (510 mps). Used on minor warships.

100 mm/45 (3.9") Model 1933

Not in service, this weapon was intended for the De Grase class cruisers as originally designed and for the "1,010 tonne" L'Agile class torpedo boats. This was to be used in twin base ring AA mountings. Weighed 1.48 tons (1.5 mt) and fired a 32.8 lbs. (14.9 kg) shell at 2,493 fps (760 mps). The mounting for L'Agile class would have been 29.3 tons (29.8 mt) with -10 / +90 degree elevation limits. The guns were to be individually sleeved, axes 25.6 in (65 cm) apart and each had a pusher hoist with mechanical loading.

100 mm/34 (3.9") Model 1936

A lighter weight gun intended for submarines of the Aurore, Roland Morillot and Emeraude classes, but only Aurore herself ever saw service. The gun weighed 0.98 tons (1.0 mt) and the gun and mounting together weighed 3.0 tons (3.05 mt). Recoil was 22.4 in (57 cm) and elevation was -5 / +30 degrees. The fixed round was 31.7 inches (803 mm) long.


Data from:

  • "Naval Weapons of World War Two" by John Campbell
  • "Navies of the Second World War - The French Navy" by Henri le Masson
  • "Destroyers of World War Two: An International Encyclopedia" by M.J. Whitley


  • "The French Navy under Steam" picture essay in "United States Naval Institute Proceedings" Vol. 80, No. 7, July 1954

Page History

28 December 2008
25 February 2012
Added photograph of Bouclier