The guy is actually Alfred Frank. As far as I know he is a small operation, but he has specialised in the larger turbines. I recall that he had a friend at a university who help with some of the design work. He developed his own chambers with the aid of a glass outer cover that enabled him to see the combustion. He was one of the first to have internal Kero start. For what it is worth the name use of the surname is like Wright bros, de Havilland or Rolls Royce. Alfred is a very hard worker, he only speaks German and as a result has sold mainly to German speaking countries. The engines are favoured by those who want a large powerful engine for large planes. I have done repairs to 2 of his engines and they were very nicely made. If I was to buy an engine from him I would get a german speaking friend to do it for me and ring him up. He has been in business a long time and is often at the German meetings supporting his customers.

John