The 100 Ton Gun was created by Sir W C Armstrong at Newcastle-on-Tyne in 1870 and was one among twelve engineered. Eight were produced for the Italian Navy, 2 were sent to Malta, and 2 to Gibraltar. The one hundred Ton Gun located at Napier Battery is the best preserved.
The 17.72 in. rifled muzzle loader, or 100 Ton Gun, features a barrel length of thirty two.65ft, of that thirty.25ft are rifled and was capable of firing up to eight miles. Hydraulic power generated by a external-combustion engine was three elevate and traverse the Gun. It took a minimum three hours to produce the required amount of steam to work the guns mounting although this was quite acceptable since it took a Spanish warship a minimum of 3 hours to enter the bay of Gibraltar once it was sited off the point of Tarifa in Spain.
The one hundred Ton Gun projected a 2000lb shell with a velocity of around 1540 feet per second. This needed 450lbs of gun powder to fire and gave the projectile a smashing impact of 33,230ft/ton, permitting it to penetrate twenty four inches of solid iron. The rate of fire for the Gun was one round fired every four minutes and it needed thirty five men to operate the Gun.
The 100 Ton Gun is located in Rosia Bay in the South District, near the Gibraltar Royal Police headquarters and next to the exclusive Anchorage residential development. The easiest way to get there is to jump onto the route 3 bus which has a stop right next to the 100 Ton Gun.
After you have finished visiting the Hundred Tonne Gun, you can take a short five minute walk to Camp Bay where you can have some refreshments at the cafe there and enjoy the views and beach or alternatively you can walk for a further five minutes through the tunnel and be at Europa Point where you can enjoy views of Africa, visit the lighthouse, Church and Mosque aswell as the visitors centre and cafe which are situated at Europa Point. There is also a large safe playground for children.
You can catch bus 3 as mentioned above, it really is the easiest way to get there and you can simply ask the driver to tell you when to get off!