They do. Natural Gas fueled generators are practical at 50MW capacity. GE basically sells a 747 engine (CF6) driving a generator, known as the LMS6000<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;General_Electric_LM6000" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;General_Electric_LM6000</a><p>[1] <a href="http:&#x2F;&#x2F;www.geaviation.com&#x2F;marine&#x2F;engines&#x2F;military&#x2F;lm6000&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.geaviation.com&#x2F;marine&#x2F;engines&#x2F;military&#x2F;lm6000&#x2F;</a>