The MVVS 2.5R-58 was an extremely successful product of the State-run MVVS workshops in Brno, Czechoslovakia (now the Czech Republic). The engine was developed in 1957, winning the 1957 World Control-Line Speed Championship in the process. With a few minor modifications it was the 1957 winning engine which appeared in 1958 as the MVVS 2.5R-58. Although an excellent and extremely well-made engine with a remarkable performance, it was nontheless narrowly defeated in the 1958 World Control-Line Speed Championships by the newly-introduced MOKI S-1 motor from nearby Hungary, which took the first two places at that event. It's a tribute to MVVS that the design of the MOKI S-1 appeared to be largely based upon that of the MVVS 2.5R-58.
This model was later put into limited production at the MVVS workshops, the result being that some 2,000 examples ended up being manufactured in total. For the complete story of the early MVVS engines, including the 2.5R-58, see my earlier article on the subject which may still be found on Ron Chernich's "Model Engine News" (MEN) web-site. A full review and test of the MVVS 2.5R-58 may be found elsewhere on this website.