[Fremsley]

Hands up, I know zip about thermodynamic/fluid dynamics etc. My background is in mechanical engineering and editing. That article doesn't pretend to be a technical masterpiece, but instead is 'WEB' written, and serves solely as an introduction to a relatively unknown design and concept. Which, consequently, is available to buy should anyone wish to pull it to bits and have a look at the internals, which is something I wouldn't mind doing!