Still, the vast majority of models of submarines with rubber motor class EL-500 (500 mm in length) are built on the same scheme. However, the adopted version with the detachable bow and stern parts of the hull has a number of disadvantages. No matter how carefully manufactured parts, the line connectors on the polished surface of “skin” still stand out, which spoils the appearance polyopia. Students involved in a circle of the second year (namely, they calculated the design of class-EL), not under force independently to build the model without the constant help of the leader of the group.
For two years the young athletes of syut Timiryazevsky district of Moscow building a model of another type — with cassette block rubber motor. The main advantage of such boats — easy to debug the plant, the ability to use one cartridge on several models. Case polycopy become monolithic, simplified manufacturing, Assembly and finishing.
The basis magazine is dural tube ø25×1 and a length of 377 mm. a Substantial part of frezeruyutsya or cut in order to an educated window simplified the linkage of the rubber motor hook forward of the lug and the prop shaft. Untouched remain only condowie pipe sections with a length of 25 mm, the cutting depth is 10 mm. the nasal boss is machined from type alloy D16T. Its front end is designed in the form of a shank with thread M8, at the end of a drilled blind hole in it and cut M4 thread under the hook for the rubber motor. The finished part is fixed to the pipe block by means of two M3 screws.