Sorry for the inactivity of Submarine Matters Intelligence (SMI).
Pete's been in hospital for 10 days (heart) arriving back on November 27. Owing to this unwanted situation Pete has been given 2 more medications to add to his existing 7 per day.
Ulilizing my frequent traveller status (short quarantines. Tested for Covid every day in Germany and Australia) and that it was an emergency I was/have been given special exemption under Australia's Covid laws to visit Pete.
We will again be publishing 2 articles a week.
You can now send comments as No Comments below articles has been lifted.
We will be doing 2 Reports to Donors in December to make up for November's inability.
Petra
9 comments:
My comment was intended with humour. I apologise I didn’t realise the Petra/Pete distinction at first, I thought it was Pete doing the travelling, and the jest was made with tongue-in-cheek envy.
As I stated first, I am delighted that Pete is recovering, and I was not taking any form of confrontational position.
Again, I apologise for any offence, I assure you any such was emphatically not intended.
I wasn’t aware of the nomenclature shift from 214 to 218 was for linguistic cultural reasons in Singapore, that is very interesting, thank you for that insight. I am aware of the evolutionary relationship of the 218 to the the 214. My point is that the final 214TN seems have evolved in a parallel way to an end state remarkably similar to the Singaporean one. Do you have any further comments on the design evolution and operational reasons/implications of the increased MH tankage of the derivative as the final Reis design evolved from the original HDW-MFI/TKMS CERBE specification?
Great to have you back, Pete! Hope you're keeping well and wish you the best of luck on the road to full recovery.
Thats OK Clive
We don't hold a grudge over an honest error.
We've also removed our angry comment.
On Turkey's submarine programs the only Unclassified comments we can add fall short of your overt knowledge.
How bout you write a 5 short para comment with hyperlinks on Turkey's programs then we'll publish it as a SubMatts article?
Regards
Pete andd Petra
Thanks Gessler [at Dec 1, 2021, 12:12:00 AM]
For your good wishes.
Pete reports that after his heart attack heart specialists, in Canberra, conducted an UltraSound of Pete's heart.
2 days later a larger team conducted a through vein to the heart Angiogram aka
https://en.wikipedia.org/wiki/Angiography
Fortunately they saw Pete's heart chambers, veins and arteries had not sufficiently narrowed to require stents and/or open heart surgery.
A close call.
Pete, of course, has been briefed and studied what to do, and what Not to do, to prevent a heart attack recurrence or potentially fatal escalation.
Still heart disease is a lifelong condition that Pete's Dad https://en.wikipedia.org/wiki/John_Coates_(general) died of in 2018.
Petra
I recently stumbled on below interesting article re Turkish 214TN "Reis" program, or more usefully as the article explains, "REIS-2"
It has a number of interesting nuggets re construction methods, hull strengths and supply engagement issues (EG: design flaws, pressure hull plates coming from Austria as local industry could not produce HY100 to required std)
Also some great insights into the development revisions of the design, with the final signed off in 2017 being over 2M longer than original, and largely detached from the length published in the glossys.
But the bit that grabbed me was that the final design increased the number of MH cylinders from 6 x 6 (6 rows of 6 cylinders each) to 7 x 6. This is a substantial increase (c. 16%) which PRESUMABLY will extend AIP operational windows.
I say presumably because, although the article isnt very clear, its implied the LOX storage is unchanged. This is open to intepretation, but made me wonder if, for example, there are consumption ratios between the two component fuels that change under usage scenarios - EG: does running a PEM at v.low or v.high power output affect the ratio of Hydrogen/O consumption - if so that would inform some interesting speculation on the mission profile the Turks envisage for these new boats.
The answer may lie in whether PEM's can be "throttled" intra-cell by varying fuel flow thereto, or if they only really run in binary state (on/off) and the power provision is governed by varying the total number of cells in use. A lot of digging and I've found a lot of contradicting info on this: it seems fuel-cells in general CAN be throttled, but they do have a specific peak-efficiency point, and in the Sub context of seeking maximum power extraction, the question is left hanging.
On balance I suspect that LOX capacity HAS increased inline with MH, and the author just didnt make this point crystal clear (or didnt know) but the general question of how PEM's are governed/throttle on subs, still stands.
It also begs the question of whether the Turks (a) want longer endurance or (b) need to compensate for hotel load of their indigenous systems. Or both. Of course this we'll never know, nor does it really matter, but fun to speculate.
Finally, it made me wonder if anyone had any idea of the number of tanks in use on the very comparable (in terms of displacement) 218SG. In other words, is this the extra capacity in the Resi-2 really novel, or not.
https://www.defenceturkey.com/en/content/type-214tn-reis-class-tcg-piri-reis-submarine-3827
Une excellente nouvelle. Longue vie à Peter !
Thanks Clive [your Dec 1, 2021, 4:50:00 PM]
On Turkish Reis subs.
We plan to turn your comment into an article tomorrow.
Cheers
P & P
Thanks Eric
For your good wishes.
I hope I live to the 2040s (ie. when I'm 80). In time to see the Aussie SSN operational.
Pete
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