Just starting to watch when a thought came through. I served on a Knox Class Frigate in the early '70s. It had a 1200psi steam plant with superheat at (I think) 975 degrees. This was an efficiency measure (the Knoxes had a single screw while the preceding Garcias had, I seem to remember, twin screws) that was not too troubled during my service. Older ships were running the 692 (Sumner/Gearing) class steam powerplant (the one I trained on), at 600lb pressure (I forget the superheat temp on that one). The Sumner powerplant was pretty trouble free as far as those things go. The Knox class had a reputation for springing all but invisible, life threatening, leaks, but I never had one happen while I was there as a machinist's mate striker. I read much later that high pressure steam plants were part of the German to USA tech transfer that took place after the end of WW2.
Don't forget, in between - in the early '60's part of the Brooke class actually had the "German designed" P-fired boilers (with a "supercharged" firebox like the report describes - and they were truly awful. We used to stand on the pier and listen to them try to light off. It sounded like they were trying to start a jet that was prone to flame-outs. They spent a lot of time tied to the pier. The DD's went to 1200 psi with the Forest Sherman's in the early 50's.
I question the translation…atomization steam is used to well, atomize the fuel as it is sprayed in the boiler. Fans are used to send pressurized air in the windbox and exhaust fans are used to keep the firebox lower. It is crucial to keep the windbox higher pressure than the firebox. We are talking inches of water pressure. I think they are talking about that when they translated to supercharging
Actually, the US built some of these - calling them P-fired Boilers - they had what looked like a giant turbocharger - with an electric motor between the exhaust and intake spools - so, literally a centrifugal "supercharger" blowing into a relatively small combustion chamber that operated at a very high pressure (I forget the exact number but it was measured in PSI not inches of water.) There were serious issues - they only built 4 of them.
German DDs caught no breaks at all. Hunted by _HMS Warspite,_ bombed by the Luftwaffe, pounded by arctic seas, and of course mechanical gremlins made their overall performance in WWII pitiable.
I've always wondered why Gernman DD's performed so poorly when compared to U.S., British and Japanese DD's. Yes, I did learn something new today!
Just starting to watch when a thought came through.
I served on a Knox Class Frigate in the early '70s. It had a 1200psi steam plant with superheat at (I think) 975 degrees. This was an efficiency measure (the Knoxes had a single screw while the preceding Garcias had, I seem to remember, twin screws) that was not too troubled during my service. Older ships were running the 692 (Sumner/Gearing) class steam powerplant (the one I trained on), at 600lb pressure (I forget the superheat temp on that one). The Sumner powerplant was pretty trouble free as far as those things go. The Knox class had a reputation for springing all but invisible, life threatening, leaks, but I never had one happen while I was there as a machinist's mate striker.
I read much later that high pressure steam plants were part of the German to USA tech transfer that took place after the end of WW2.
Don't forget, in between - in the early '60's part of the Brooke class actually had the "German designed" P-fired boilers (with a "supercharged" firebox like the report describes -
and they were truly awful.
We used to stand on the pier and listen to them try to light off. It sounded like they were trying to start a jet that was prone to flame-outs.
They spent a lot of time tied to the pier. The DD's went to 1200 psi with the Forest Sherman's in the early 50's.
850 super heat on Sumner and Gearing class.. m type boilers duel furnace.
Thank you 👍
They look like an early design concept for the Fletchers.
I question the translation…atomization steam is used to well, atomize the fuel as it is sprayed in the boiler. Fans are used to send pressurized air in the windbox and exhaust fans are used to keep the firebox lower. It is crucial to keep the windbox higher pressure than the firebox. We are talking inches of water pressure. I think they are talking about that when they translated to supercharging
Actually, the US built some of these - calling them P-fired Boilers - they had what looked like a giant turbocharger - with an electric motor between the exhaust and intake spools - so, literally a centrifugal "supercharger" blowing into a relatively small combustion chamber that operated at a very high pressure (I forget the exact number but it was measured in PSI not inches of water.) There were serious issues - they only built 4 of them.
an interesting tangent to go off on...
Have you ever talked about the various sponson guns found on pre-WWII US battleships that were usually removed at some point on this channel before?
@@pukalo I have not. It could be a topic one day, but it is not on my list.
German DDs caught no breaks at all. Hunted by _HMS Warspite,_ bombed by the Luftwaffe, pounded by arctic seas, and of course mechanical gremlins made their overall performance in WWII pitiable.
Did other naval units like the Scharnhorst & Graf Spey also suffer mechanical problems due to the same causes you covered in this video?
at 2:28 L M A O