#Sommergibili u boot install

The use of snorkel in combat ready U Boats. The Duce aboard the H3 observing the Ferretti's snorkel image004.png (139.42 KiB) Viewed 2623 times Ufficio Storico della Marina Militare.ĭoes anyone have any idea if there was any connection / contact between the works of Ferretti, Walter and the Dutch? TIA. The concern of the technicians was that a small variation in depth by steering errors, cause the closure of the intake pipe, causing such shortness of air that the entire crew would be poisoned by gas. In September 1943 a system of retractable snorkel was mounted attached to the conning tower of the U 235 and U 237. The tests showed that under normal sailing conditions no damage was suffered by the crew. The Directors Middendorf and Immich built and assembled the prototype in just three weeks on the U 57, which carried out sea trials in August 1943. The construction was alloted to the firm Deutsche Werke AG in Kiel. As a result of the work of Gabler and Hoper of June 8, 1943, was ready a project for a prototype which would be attached to the U 57 and U 58. There Walter proposed attach a ventilation system to the periscope of a submersible type II and after obtaining experiences standardize the system to all operating submersible. Walter wrote to Dönitz on the progress of his work and intervention on the Director of Naval Construction, Dr Fischer and the High Office for Ship Building (Hauptamt für Kriegschiffbau). But before they could draw conclusions about it, the system was dismantled.įinally, in a letter dated Dr. This system fell into German hands after the conquest of Holland in 1940 when they seized the Dutch u boats. However suddenly the Submarine Command decided to remove the snorkel system in 1937.Īt that time (early 30s) the Dutch began working on a similar project and patented an extensible mast for air intake for the diesel engines while the boat was submerged (I do not know if they knew the work of Ferretti or developed it by its own).

#Sommergibili u boot install

In the early 30s Ferretti improved his design and in 1934 the Royal Italian Navy decided to install it in the new submersible 'Sirena' Class. The device was tested in November 1925 and on April 13, 1926, during maneuvers off the coast of Tripoli was shown to the Duce. The prototype was built in the shipyard of Taranto and installed on the submersible H3 by the local shipyard in Naples.

This device was equipped with dynamic valves, which rotated when opening, thus preventing the flooding by centrifugal action. This is what U-629’s emblem actually looked like.During the 20s (twentieth century) Major (Corps of the Navy Engineers) Pericle FERRETTI proceeded to design and to built a real snorkel device through a tube properly positioned in the conning tower of the submarine. Un periodico con interessanti articoli dedicato agli appassionati di sommergibili tedeschi nonché ai modellisti.ĭie letzten Fotos und die letzte Fahrt von Kptlt. Disponibile il volume 18 di questa serie realizzata da Axel Urbanke con foto inedite (alcune anche a colori) di U-Boot in azione durante il secondo conflitto mondiale.