Yet another superb 3D file set thanks to the creative talents of Randy Sanders. 
 
The X class was a World War II midget submarine class built for the Royal Navy during 1943–44. Known individually as X-Craft, the vessels were designed to be towed to their intended area of operations by a full-size "mother" submarine – usually one of the T class or S class – with a passage crew on board, the operational crew being transferred from the towing submarine to the X-Craft by dinghy when the operational area was reached, and the passage crew returning with the dinghy to the towing submarine. Once the attack was over, the X-Craft would rendezvous with the towing submarine and then be towed home.
 
The craft was about 51 ft (16 m) long, 5.5 ft (1.7 m) maximum diameter and displaced 27 long tons (27 t) surfaced and 30 long tons (30 t) submerged. Propulsion was by a 4-cylinder Gardner 4LK 42 hp diesel engine, converted from a type used in London buses and a 30 hp electric motor, giving a maximum surface speed of 6.5 knots (12.0 km/h; 7.5 mph) and a submerged speed of about one third of that. 
 
The weapons on the "X-Craft" were two side-cargoes – explosive charges held on opposite sides of the hull with two tons of amatol in each. The intention was to drop these on the sea bed underneath the target and then escape. The charges were detonated by a time fuse. The craft were fitted with electromagnets to evade detection by anti-submarine detectors on the sea bed and also with sonar and a periscope.
 
This set of files will allow you to print out your own hull for a beautiful representation of this craft in 1/24 scale, netting an overall length of approximately 650mm (25.6") and with a beam of 84mm (3.3"). This size makes it perfect for the Nautilus Drydocks 250 Series EasyDriver for RC operation.
 
Max part height is 160mm.