Torpedo data computer

propbeanie · 01-28-18, 05:57 PM

Aktungbby has a quote there: "THIS ALLOWED FOR CONSTANT POSITION UPGRADES The position keeper solves the equations of motion integrated over time. The result is a continuous prediction of where the target is at any instant. Successive measurements of the targets' position are compared to the position keeper predictions and corrections for error are introduced with the hand cranks. The predicted target position becomes more accurate as more measurements make the corrections smaller. It is typical to get an accurate track on the target after about three or four observations under good conditions."

... and the diagram shows the inputs on the left and near the top for several "real-time" data updates that flow through the "Receiver" section, with multiple choices for data flow and inputs, whether periscope, hydrophone, whatever, along with updates of the subs own course and speed - looks to me, anyway. It also looks like any "adjustments" made with the hand cranks at the receiver fed back to the "measuring device" stations. The Mark 18 is a copy of a German electric torpedo found onshore US in 1942 (although the US had been working on one already, and the Mark 4 came out in 1943... one of my "searches" brought up a revovly link, which is nothing more than the wikipedia.org article on the mark 18, and it showed "The Mark 4 was developed to support the Mark 18 torpedo...", but I could not find that in the text itself (old eyes??)...

If you're anywhere near Washington state (Keyport), it might worth the while to visit
http://www.navalunderseamuseum.org/permanent/

They say they have a Mark 4 there in the Silent Victory exhibit.

Nikdunaev · 01-28-18, 08:24 PM

Sadly enough all those places are really too far away from me to visit in person.
I am on the other side of the Atlantic

But I think I get the overall idea...

What is interesting though is why is there so little material on the Mark IV out there? Given that it was logically considered an improvement over the old version and was installed on the new boats including those built some time after the war and also probably over time retrofitted to the older ones...
Should it not be more common today in both the surviving boats and the documents than the Mark III?

Anyway if there is any chance to get a scan or just the text or any digital version of the OP1442/1442A/1056A pamphlets... That would be absolutely amazing!

aanker · 01-29-18, 11:01 AM

Maybe try explaining your interest in an email to USS COD. There is a webmaster link and I'm pretty sure they could forward you to the right people.

I've found that these types of sites - real WWII submarine restoration & basically museum sites are more than happy to share what they know to serious people such as yourself.

It's worth a try and the worst that can happen is they say, 'no' - but I don't think they will do that.

Don't give up!

01-28-18, 05:57 PM	#1
propbeanie CTD - it's not just a job Join Date: May 2016 Location: One hour from Music City USA! Posts: 10,098 Downloads: 451 Uploads: 2	Aktungbby has a quote there: "THIS ALLOWED FOR CONSTANT POSITION UPGRADES The position keeper solves the equations of motion integrated over time. The result is a continuous prediction of where the target is at any instant. Successive measurements of the targets' position are compared to the position keeper predictions and corrections for error are introduced with the hand cranks. The predicted target position becomes more accurate as more measurements make the corrections smaller. It is typical to get an accurate track on the target after about three or four observations under good conditions." ... and the diagram shows the inputs on the left and near the top for several "real-time" data updates that flow through the "Receiver" section, with multiple choices for data flow and inputs, whether periscope, hydrophone, whatever, along with updates of the subs own course and speed - looks to me, anyway. It also looks like any "adjustments" made with the hand cranks at the receiver fed back to the "measuring device" stations. The Mark 18 is a copy of a German electric torpedo found onshore US in 1942 (although the US had been working on one already, and the Mark 4 came out in 1943... one of my "searches" brought up a revovly link, which is nothing more than the wikipedia.org article on the mark 18, and it showed "The Mark 4 was developed to support the Mark 18 torpedo...", but I could not find that in the text itself (old eyes??)... If you're anywhere near Washington state (Keyport), it might worth the while to visit http://www.navalunderseamuseum.org/permanent/ They say they have a Mark 4 there in the Silent Victory exhibit. __________________ "...and bollocks to the naysayers" - Jimbuna

01-28-18, 08:24 PM	#2
Nikdunaev Sailor man Join Date: Jul 2014 Posts: 43 Downloads: 4 Uploads: 0	Sadly enough all those places are really too far away from me to visit in person. I am on the other side of the Atlantic But I think I get the overall idea... What is interesting though is why is there so little material on the Mark IV out there? Given that it was logically considered an improvement over the old version and was installed on the new boats including those built some time after the war and also probably over time retrofitted to the older ones... Should it not be more common today in both the surviving boats and the documents than the Mark III? Anyway if there is any chance to get a scan or just the text or any digital version of the OP1442/1442A/1056A pamphlets... That would be absolutely amazing!

01-29-18, 11:01 AM	#3
aanker Pacific Thunder Join Date: Apr 2004 Location: Yellow Sea Posts: 1,896 Downloads: 236 Uploads: 14	Maybe try explaining your interest in an email to USS COD. There is a webmaster link and I'm pretty sure they could forward you to the right people. I've found that these types of sites - real WWII submarine restoration & basically museum sites are more than happy to share what they know to serious people such as yourself. It's worth a try and the worst that can happen is they say, 'no' - but I don't think they will do that. Don't give up!