[Holtzauge]

drgondog, In these types of discussion I find it irrelevant who has and who does not have a degree. There are a lot of knowledgeable persons out there who do not have degrees but who can hold their own in these types of discussions anyway. I only pursued the matter of education since you bought it up in a previous post and leaned on it for credibility.

For your benefit: I happen to have an Msc in aeronautical engineering myself specialising in aerodynamics and structures. It's from the Royal Institute of Technology in Stockholm, Sweden. I worked in the Swedish aerospace industry for about 14 years for companies like SAAB and Ericsson Radar Electronics on systems for the JA37 Viggen and JAS39 Gripen fighters before leaving the industry to pursue other goals.

So if we now can leave the discussion of degrees behind us, I still think you need to reconsider your position on the usability of Harri's thrust formula and the importance of exhaust thrust.