Gerhard, Antony, Thanks for your nice comments. The participants in the photo, left to right, are: Fred Hecker, Tim Jovick, Tom Stahl, Vince Murphy, Howie Smith, Bob Keeler, Dr. Mike Orgel, & Bill Kammermeyer, [Scott Safranski was missing] Gerhard, I'm not sure I totally understand your question on the City Class funnels but I've attached my reconstruction of the corrected propulsion system schematic (versus Ashley's NPS version) showing the engine steam exhaust entering the boiler