Tores mailbox VIIC and VIIC/41 operation and technical details

[NZSnowman]

I was thinking about linking the Auxiliary Lubricating Oil Pump funnel to the FO Collecting Tank


You can see a small funnel next to the pump.


I was thinking the piping might look something like this? What do you think?

[tore]

Simon.
The aux fueltransfer pump is a reserve luboil pump as well and when you change from fuel to lub oil and vice versa you have to drain the pipes and pump properly when you change. It could be the pump is drained through "k" via the funnel to the fuelcollecting tank or "k" are sniffers which are opened to let in air so fuel or luboil can be drained via the normal pipes to either in case of luboil to the luboil storagetank or in case of fuel to the fuelcollecting tank. I don`t think the pump has an ordinary driptray drainage. In any case I don't think the system is hooked up to the pressure side of the hoseconnection for the hand pump. I shall try to figure out something tomorrow as it is a bit late now
Tore

[tore]

Simon
The reserve luboil pump can be drained to the luboil storage tanks ( when bunkering luboil) as indicated on the below system sketch. In that case the cocks "k" act as sniffers e.g. letting air into the pump for easy drainage, I guess the drain would go OK by gravity. As a fueltransfer pump however I believe the fuel in the pump is drained via the two "k"s to the fuel collectiontank. In both modes the "k" pipes would go into the funnel you have indicated. The pipes from the funnel would end up in the fuel collecting tank. I don`t think there is a connection to the handpump. As to the luboil mainfilters I am in doubt, anyhow they should not be hooked up with the drainpipes from the "k" funnel as a filterdrain would probably be to low for gravity drain. I should leave a possible filterdrain at this point.
Tore

[NZSnowman]

Tore, do these just drained into the bilge?

[tore]

Simon.
 Fueltank compensating water drain.
The pipes you indicates are drain for the seawater for fuelcompensation and goes to the bilges.
Tore

[NZSnowman]

Tore,

New layout and I have added the missing piping for the Fuel Oil Compensating System.

On plate 10, the forward pipe from the tank, is it open to the sea?

The aft pipe from the tank, where does it go? Does it goto the muffler? Valve 'E' open to the sea?

http://www.uboatarchive.net/U-570Plate10.htm

[tore]

Simon.
The forward pipe of the headertank is the outletpipe open to the sea. The aft pipe is the supplypipe from the exhaustcooling coming from the aft end of the silencer. Valve "e" is the draincock/valve of the exhaustpipe going to overboard.
Tore

[NZSnowman]

Tore,

In these three photo

[tore]

Simon.
I am not sure if these pipes are the drains from the headertank.
I should think the drain and the outlet from the headertank could basically be any place within the casing and I don`t see any particular reason for having the end of the pipe flush with the casing side. I don`t remember seeing water gushing out from the casing while the engines were running. I`ll have a closer look at my photos and let you know if I have any ideas.
Tore

[tore]

Simon.
I have checked with all my photos and cannot find any confirmation of wateroutlet flush  with the casing side. I would suggest you place the outlet inside the casing and not flush with the casing side as long as we don`t have proper evidence otherwise.
Tore

[NZSnowman]

Simon.
I have checked with all my photos and cannot find any confirmation of wateroutlet flush  with the casing side. I would suggest you place the outlet inside the casing and not flush with the casing side as long as we don`t have proper evidence otherwise.
Tore

Tore,

I have decided to move the position of the piping for the Port and Starboard MB & RFO Tank 2.

I decided to move this section of piping because...

• As it reduces the total length of the piping by about 2 m.
• It makes the piping simpler as it does not need to go around the aft battery hatch.
• I was able to location small deck hatches above those outlet.

[NZSnowman]

If you used a 3-way valve like below and a handle you can open/closed the valve.

In the quick 3D drawing the pipe runs just under the decking and then steps down, the small deck hatch allow access to the valve, the straight through piping run even with the side casting surface, and the other pipe run to the side of the saddle tank.

[NZSnowman]

I am able to shorter the piping by about 6 m

[tore]

Simon.
I guess this shall work  OK.
Tore

[NZSnowman]

Simon.
I guess this shall work  OK.
Tore

I started to more the piping for the Port and Starboard MB & RFO Tank 2 but the Blowing System for MB & RFO Tank 2 valves is in the way

So, I will keep them in there original and just realign the piping a little