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"CB Midget Submarines" Topic


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243 hits since 9 Apr 2022
©1994-2022 Bill Armintrout
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Tango01 Supporting Member of TMP09 Apr 2022 4:44 p.m. PST

"In the 1930s, the aircraft manufacturer company "Caproni" had developed the first Italian midget submarines, the "" class, and built two units. These small vessels armed with 450mm torpedoes underwent a series of trials in which several issues emerged. The navy experts considered the CA too fragile and lacking sufficient manoeuvrability to conduct offensive actions against moving targets. Based on the testing experience, and the proposal for modifications, the Caproni factory developed an improved version of the vessels, which became the CB class. Two prototypes (CB 1 and CB 2) were ordered into production and were ready for sea trials in summer 1940.


The CB submarines had a displacement of 36-45 tons, 15 meters long and 3 meters wide, they could reach a maximum speed of 7,5 knots, emerged, and 6,5, submerged. The maximum depth they could reach was55 meters and their operational range was (emerged) 1000 nautical miles at 5 knots or (submerged) 60 nautical miles at 3 knots. Armed with two 450mm torpedoes, they had a crew of 3-4 men. The propulsion was granted by a diesel engine (90 HP) and an electric engine (100 HP). Compared to their predecessors of the CA class, the CB were bigger, more manoeuvrable and equipped with more powerful engines…."

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