I'm interested too, and we haven't really gotten down at all as to the "why or how" of it here yet. Sounds like a project from the ancient past, of my old university "propulsion" classes I've forgotten more than I learned about. But over time we may get more "anecdotal" evidence as to thrust values but it will be just anecdotal until some sort of accurate testing can be done. As with all things, the devil is in the details.