Type U 19 submarine

Type U 19 was a class of U-boats built during World War I by the Kaiserliche Marine. Type U 19 U-boats were the first U-boats with Diesel engines for surface propulsion and charging the batteries for the electrical engines. Originally the preceding Type U 17 submarine was intended to be the first diesel U-boat, but delays in developing these diesel engines meant that these two Type U 17 U-boats received Kerosene engines instead. Other improvements included the change from 45-cm to 50-cm torpedo tubes for launching the G6 torpedo, and the installation of a deck gun.^[3]

Class overview
Builders	Kaiserliche Werft Danzig
Operators	Imperial German Navy
Preceded by	Type U 17
Succeeded by	Type U 23
Completed	4
Lost	1
General characteristics [1][2]
Displacement	650 t (640 long tons) surfaced 837 t (824 long tons) submerged
Length	64.15 m (210 ft 6 in)
Beam	6.10 m (20 ft 0 in)
Height	7.30 m (23 ft 11 in)
Draught	3.58 m (11 ft 9 in)
Propulsion	2 shafts 2 × MAN 8-cylinder two stroke diesel motors with 1,700 PS (1,677 bhp; 1,250 kW) 2 × AEG double modyn with 1,200 PS (1,184 shp; 883 kW) 320 rpm submerged
Speed	15.4 knots (28.5 km/h; 17.7 mph) surfaced 9.5 knots (17.6 km/h; 10.9 mph) submerged
Range	9,700 nmi (18,000 km; 11,200 mi) at 8 kn surfaced 80 nmi (150 km; 92 mi) at 5 kn submerged
Test depth	50 m (164 ft 1 in)
Complement	4 officers, 31 men
Armament	4 × 50 cm (19.7 in) torpedo tubes (2 each bow and stern) with 6 torpedoes 1 × 8.8 cm (3.5 in) SK L/30 gun (from 1916 2 ×) or 1 × 10.5 cm (4.1 in) SK L/45 gun (from 1917)

The four Type 19 U-boats were ordered on 25 November 1910 from the Kaiserliche Werft Danzig shipyard.^[3]

Design

Type U 19s had an overall length of 64.15 m (210 ft 6 in) The boats' beam was 6.10 m (20 ft 0 in), the draught was 3.58 m (11 ft 9 in), with a total height of 7.30 m (23 ft 11 in). The boats displaced 650 tonnes (640 long tons) when surfaced and 837 t (824 long tons) when submerged.^[1][4]

Type U 19s were fitted with two MAN 8-cylinder two-stroke diesel engines with a total of 1,700 metric horsepower (1,250 kW; 1,677 bhp) for use on the surface and two AEG double-acting electric motors with a total of 880 kW (1,196 PS; 1,180 shp) for underwater use. These engines powered two shafts, which gave the boats a top surface speed of 15.4 knots (28.5 km/h; 17.7 mph), and 9.5 knots (17.6 km/h; 10.9 mph) when submerged. Cruising range was 9,700 nautical miles (18,000 km; 11,200 mi) at 8 knots (15 km/h; 9.2 mph) on the surface and 80 nautical miles (150 km; 92 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged.^[1] Diving depth was 50 m (164 ft 1 in).^[4]

The U-boats were armed with four 50 cm (20 in) torpedo tubes, two fitted in the bow and two in the stern, and carried six torpedoes. The boats' complement was 4 officers and 31 enlisted.^[1][4]

Ships

Name	Fate[1]
U-19	Surrendered on 24 November 1918. Scrapped in 1919-20 at Blyth
U-20	Stranded on 5 November 1916 at Jutland. Broken up in 1925.
U-21	Sunk 22 February 1919 whilst on her way to internment
U-22	Surrendered on 1 December 1918. Scrapped in 1919-20 at Blyth