In 1892 they accounted for 68 % of all electricity generated in Britain , dominating this market until the advent of steam turbines .
Willans engines ran at 350 to 500rpm and could be direct - coupled to generators .
In 1892 generators accounted for 68 % of all electricity generated in Britain , dominating this market until the advent of steam turbines .
Willans engines ran at 350 to 500rpm and could be direct - coupled to generators .