>Hi Karol. >What you have circled on your first drawing is one wall of the >air vent up from the boiler room. The solid line to the left >of it is the air screen. The dashed line to the left of that >is the actual uptake. On most drawings the air screen is more >prominent than the uptake. > >At one point in Mr. Pounder's pg19 drawing, what he has marked >as an air screen is just one wall of an air vent. > >I think the various parts we are looking at are: >-The boiler room casing is part of the ship's structure. It >starts from the outer funnel and is formed by the bulkheads >from the fiddley top down to E deck. That deck, the bulkheads >outside of the fan rooms, F deck, and the hull complete the >enclosing of the boiler room. >-Against the fore and aft walls of the casing are the draft >air ducts down to the fan rooms and the vent air ducts back >up. The draft duct is formed by the casing down to E deck and >a divider down to F deck. The vent air duct is formed by that >same divider and the divider you pointed out starting up from >G deck. As you say it shows on the side to side cross section >drawings but not on the fore-aft drawings so I am not sure how >it runs. There are walkways and pipes that might interfere >with it. It may also be part of that extra wall you pointed >out on the side bunkers. >-The uptake starts from the boiler front and runs in a >streamlined shape all the way up the funnel. >-The air screen closely encases the uptake from the top of the >cleanout doors on the boiler front up to the fiddley top. > >Probably what we need here is an isometric drawing to sort the >shape of the vent air duct at G deck. > >Bill
Good Evening Bill.
I'm not sure if i fully understand what you wrote. But if i understand you correctly, red lines create the actual uptakes, orange are air screens, light blue is a fidley wall right on top of air screen and green is vent shaft supplying fresh air to stokehold fans.
As far as i know the boiler uptakes are some kind of double-layer structure. The actual uptake is inside the steel structure of simillar shape but bigger. The air gap between those 2 structures serves as some kind of 'air insulation' to prevent overheating the surrounding space. Correct me if what i wrote is wrong.
In term of this isometric view - i'm affraid something like this does not exist. I think we would need to create something like this by our own.