Alprech lighthouse

cults3d

Hello, The lighthouse has been designed and slightly modified from the original in order to print it without supports other than those under the steps of the lighthouse foundations. The modified points are: a spiral reinforcement at the end of the stairs. 10 reinforcements instead of 4 under the platform. These are modifications designed for a complete print of the lighthouse without any support except the foundations. Designed without the new technology (Antennas) Filament printing: the lighthouse is 200mm high at 100% scale. I got it down to 75% with no problem. In resin: see photo example printed at 80% scale. Excerpt being printed: https://youtu.be/ADy88cG22IY Information found at: http://www.cote-dopale.com/tourisme/phare-d-alprech Nautical characteristics Geographical coordinates: 50°41.9' N - 001°33.8' E (WGS 84) Total height: 62 meters (62.35 m ASML) Light: white scintillating light. Rhythm: 3 flashes grouped in 15 s Lantern: Standard lantern Ø 2 m metallic Sautter-Harlé ESM n° 24150 Optics : 6 panels at 1/6, focal length 0,25 m. Range: 26 miles (48 kms) Alprech Lighthouse Description The Portel lighthouse or Alprech lighthouse is one of the six lighthouses in the Pas de Calais department. . It is located on the site of the former semaphore of the Cape of Alprech. It is a land-based lighthouse that despite its modest size of 17m culminates at the highest altitude (62.35 meters above the sea) of all the lighthouses in Pas de Calais. History The first lighthouse As early as the 18th century, there was a military semaphore at the place where the current Alprech lighthouse stands today. From the 1st of December 1818, a fire was lit there every evening. In 1825, the lighthouse service asked the Navy to cede the site of the old semaphore in order to build a lighthouse there, following an instruction linked to the general lighting programme. A ministerial decision of 14 June 1830 will ratify this request. The old semaphore buildings were restored and at the beginning of November 1830, a lighthouse with a fixed white catoptric light was put into service; it reached 10 m above the ground, i.e. nearly 50 m above sea level. It is equipped with an electric lamp lighting (power 3000 candles) supplemented by a petroleum vapor lamp of a similar intensity. The modernization of the first lighthouse The lighthouse service will then test a system allowing to give coloured flashes to the fixed lights, thus allowing to identify the origin of the light. Thus from July 1842, the Alprech lighthouse will have a fixed white light varied by red flashes every 2 minutes with a focal length of 0.15 m. The body of the lighthouse is described as "a square turret 10 m high with an adjoining storehouse forming a group with the semaphore". On 15 March 1896, a new light was installed. It has a red flash every 5 seconds, focal length 0.1875 m; it will be replaced by a light with the same characteristics but more powerful in August 1902. On January 27, 1906 it will be replaced again by a light with 3 white flashes every 15 seconds as well as a new burner with incandescence by oil. In 1928, the fire was electrified and its power increased. This new light will give 3 grouped white flashes every 15 seconds and will have a 6 panel optic at 1/6, focal length 0.25 m. The lighthouse will be destroyed during the summer 1944 by the Germans. The current lighthouse A temporary lighthouse on a metal pylon was first put in place after the Second World War (1947) before a new lighthouse was built and put into service in June 1962 . It takes the form of a white metal column surrounded by an external spiral staircase which leads to a footbridge bearing a black painted lantern. The lighthouse is 17 metres high and rises to 62 metres above the level of the open sea. It emits a signal defined as a group of 3 white flashes every 15 seconds. The optics are made of moulded glass with 3 lenses with a focal length of 0.35 metres. Its lighting is provided by an incandescent halogen lamp with a power of 650 watts. Its range is 26 nautical miles. It is coupled to a radio lighthouse whose code is "PH = .-. ...." and which carries to 30 nautical miles. It was automated in 1977. It has been listed in the supplementary inventory of M.H. On 30/12/2010. The DRAC recalls in its inventory sheet the list of fuels used: Vegetable oil: 1830 Mineral oil: around 1873 Petroleum steam: 1906 Electrification: 1928. Automation: 1977.