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|Displacement:||2 tons surfaced, approx.
18-20 tons submerged
|Length:||13.5 m (44 ft)|
|Beam:||2 m (6 ft 7 in) (approx.)|
|Draft:||2.9 m (9 ft 6 in)|
|Installed power:||80 hp (60 kW) gasoline truck engine|
|Speed:||8 knots (15 km/h; 9.2 mph) surfaced
10 km/h (6.2 mph) (on land)
|Endurance:||30–80 hours (gas)
10–20 hours (battery)
|Test depth:||50 m (160 ft)|
|Armament:||2 × torpedoes|
Seeteufel (Sea Devil) was a tracked two-man amphibian midget submarine which was designed to solve the vulnerability and technical problems associated with German midget subs that had to be launched at sea - even midget subs as small as the Neger (Negro) one man piloted torpedo.
Seeteufel is also an epithet of Felix von Luckner.
The first and only prototype was available for testing in the summer of 1944. Since there were no diesel engines available, an 80 hp (60 kW) gasoline truck engine had to be installed. It served for both surface propulsion (8 knots (15 km/h; 9.2 mph)) and land propulsion (10 km/h (6.2 mph)). Seeteufel was to be armed primarily with two torpedoes. Mines and possibly either machine guns or flame throwers were also considered.
The trials at Eckernförde showed the vessel to have very good manoeuvering and handling abilities although underpowered. It was subsequently decided that the production series should have a 250 hp (190 kW) diesel engine. It was also discovered that the tracks were too small and would have to be refitted with larger ones.
After testing was completed, a series of standard Seeteufels were ordered at the Borgward factory at Bremen but production never began. The only existing experimental vessel was taken to a facility near Lübeck, and destroyed at the end of the war.
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- "U-Boot mit Kettenantrieb" [Submarine with chain drive]. Einestages zeitgeschichten auf Spiegel Online. Spiegel Online (in German). 10 April 2008.
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