Shin Gou wrote:
http://www.greenengtech.com/index.htm

Click on the "English" button on the left.

The company claims it's a revolutionary six-stroke rotary engine.
120hp, 60lbs. Are they kidding me or what?

Actually, the answer to that question is helpfully provided in their
FAQ, question 5, "What will consultants probably say when I ask them
about the Green Engine?" With answer "They will say we are smoking
crack."

Well, actually, their answer is a bit more long-winded:

There is an engineering phenomenon that most all consultants disagree
with each other, and there is a great deal of prejudice or competition
between any of the various technologies. (I.E. Turbine specialists
discount piston technology and vice versa). Furthermore, few
consultants will give a positive report on any technology they are not
directly involved with because of liability. Also, any consultant has a
limited expertise dependent on their actual "hands on" experience, and
outside experts can only get very limited basic information about a new
technology which is being under development (Normally the most
important technology would never be showed by owner). It seems that you
ask a steam engine expert for questions about the jet engine.