Recent Posts

Pages: [1] 2 3 ... 10
1
Non Model discussions / Re: PHOTO RESOURCE
« Last post by 42rocker on 15 Jul , 2018, 11:50 »
Interesting sub pic. 
 

2
Non Model discussions / Re: PHOTO RESOURCE
« Last post by 42rocker on 15 Jul , 2018, 09:54 »
A still working link. Near the bottom of this link there are some great sub pics if you want to see some of the area between the pressure hull and the deck. 
 
http://www.histomil.com/viewtopic.php?f=338&t=3918&sid=ed78b8367e9c45d580b00da07127baf1&start=1620 
 
Later Tim
3

Unfortunately they had to remove the hard cast as the parts were not matching correctly, redid the whole thing without cast and she got a lot of painkilling medicines and as usual a lot of side effects. But we are doing fine and shall be back next week.
Tore
4
Hello Mr. Tore,


Of course, you and your wife enjoy the beach and the weekend... How is her broken hand? Is it in a hard cast or a bandaged wrapping?


Regards,
Don_
5
Don
I`ll look into it soonest, but for the week end I take my wife to the coast to relax after a hectic week for an old man. Hopefully back on monday.
6
Hello Mr. Tore,


I uploaded Skizzenbuch with corrected pages 125, 126, 127, 128, 426, and 427 into Dropbox... Again let me know if it is OK?


Regards,
Don
7

Don
We did not use any CO2 cannisters while schnorcheling, in fact generally the air quality improved as the diesels consumed the very quickly the fouled air. The problem were more individually some could not take the pressure fluctations, a few even experienced a bursted eardrum. Another experience was people with bad toothfillings experienced overpressure under the fillings creating some pain.
Tore
8
Hello Mr. Tore,


As stated by U-480's captain, they had to use many CO2 canisters while schnorchelling (I guess they were under water more than on the surface). In that situation, I would assume they had to run both ventilation blowers. Did you experience the large use of CO2 canisters while onboard of U-995?


Regards,
Don_
9
Don.
You are right in stating the major air restriction is in the float air intakevalve and the schnorchelmast, however the new system improvement was connecting the smaller schnorchel air pipe to the diesel air trunk close to the diesel air main intake valve thus eliminating the long narrow schnorchel airpipe all the way to the main inlet valve in the engineroom. The sketch might be a bit misleading with regard to the new system as it does not show very clearly the airpipe from the schnorchel mast is entering the large dieselair trunk close to the dieselair main inletvalve thereby utilizing the dieselair trunk also for possible waterintrusion. I am enclosing a revised image below. When schnorcheling you had, as you state, a limiting factor as to the speed and load of the engine. Speed because of the strength of the mast, dieselload (generator load)  because of the airconsumption. The control was monitored by the barometic pressure in the compartments, the pressure fluctuation you could feel in your airdrums.
10
Hello Mr. Tore,


Page 125 - My intent on that page was to show the huge size of the diesel air intake trunk (dark blue in Simon's drawing). Then to compare the smaller schnorchel air feed line attachment to the diesel air intake trunk. The schnorchel head air intake feeds air through the mast to a bend (newer design) or a pipe on the port side of the forward bridge (older design). Either way, the air intake from the schnorchel mast is limited in volume as compared to when running on the surface and taking air via the diesel air trunk. In addition, the compartmental air intake and exhaust stacks are shut when the schnorchel is in use; further limiting the air supply to the U-Boat.


Therefore, the air resource is limited when the schnorchel is in use...


Should I add some of the above comments to clarify and to better understand page 125?


Regards,
Don_
Pages: [1] 2 3 ... 10