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PostPosted: Mon Dec 11, 2023 9:35 pm 
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Woodstock74 wrote:


Saw it yesterday. Very exciting. Especially with the hull break that could potentially make STRETCH, SIDECAR and NOTCH more easily possible :)

Planning on doing screws for it (and others I might have mentioned)?

Cheers,

Dave


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PostPosted: Tue Dec 12, 2023 5:02 pm 
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ssn705 wrote:
Woodstock74 wrote:


Saw it yesterday. Very exciting. Especially with the hull break that could potentially make STRETCH, SIDECAR and NOTCH more easily possible :)

Planning on doing screws for it (and others I might have mentioned)?

Cheers,

Dave


Always a possibility of course. As for the Oscar I and Akula suggestion. The Akula was fairly straight forward but I haven't printed a production level yet, only a handful of prototypes. The Oscar is a pickle and I've been working on it on and off since the summer; without photos to go off of I'm using the Victor screw (the tandem-fixed screw like on the Mike) as a surrogate. And I'm struggling to get anything I like and for now avoiding reevaluating the Mike while I'm at it (but once I crack the Oscar I'll probably look at reworking the Mike).


it is unlike the Mike and more like the Victor but for now I just can't get it to look 'right'. And I'm avoiding reevaluating the Mike, and it'll probably need it once I crack the shape issues I'm running into with the Oscar I. And the shame of it all is that using the Victor screw as a surrogate, there are actually tons of photos from different angles and what I'm running into is a hardstop on my CAD abilities I think, for now.


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PostPosted: Wed Dec 13, 2023 8:33 pm 
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I appreciate you considering the things I proposed and putting so much work in. Unfortunately pictures of OSCAR I screws are few (and are probably all screencaps from the same movie). I'll keep looking.

Cheers,

Dave


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PostPosted: Thu Dec 14, 2023 9:47 am 
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Location: Ayer, Ma. USA
Dave, Mike,
Here are the Oscar propellers photos I have, and are Oscar II.
Oscar I is reported to have (depending on the source) either 4 or 5 blade non-skew screws. Probably similar to the Delta III and Papa 5 blade screws below
These are from Vepr's collection. He would probably answer himself but is busy on his research work.


Attachments:
Oscar stern-4.png
Oscar stern-4.png [ 630.26 KiB | Viewed 21453 times ]
Oscar stern-2.jpg
Oscar stern-2.jpg [ 109.98 KiB | Viewed 21453 times ]
Oscar stern -3.jpg
Oscar stern -3.jpg [ 133.05 KiB | Viewed 21453 times ]
Oscar blade tip shape.jpg
Oscar blade tip shape.jpg [ 48.12 KiB | Viewed 21453 times ]
Oscar stern from deck.jpg
Oscar stern from deck.jpg [ 94.62 KiB | Viewed 21453 times ]
File comment: Delta III 5 blade screws
Delta III class screws.jpg
Delta III class screws.jpg [ 426.93 KiB | Viewed 21450 times ]
File comment: Papa 5 blade screws
Papa in drydock.jpg
Papa in drydock.jpg [ 538.9 KiB | Viewed 21450 times ]

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Tom Dougherty
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"Project Azorian: The CIA and the Raising of the K-129" Book
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Last edited by Tom Dougherty on Thu Dec 14, 2023 10:10 am, edited 1 time in total.
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PostPosted: Thu Dec 14, 2023 9:56 am 
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And the Yankee Class screws, which were not skewback and probably emitted a significant "blade rate" low frequency for US sonar detections.


Attachments:
Yankee class SSBN props.jpg
Yankee class SSBN props.jpg [ 62.78 KiB | Viewed 21452 times ]
Yankee SSBN Screws.jpg
Yankee SSBN Screws.jpg [ 127.81 KiB | Viewed 21452 times ]
Yankeee class screws.jpg
Yankeee class screws.jpg [ 126.92 KiB | Viewed 21452 times ]

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Tom Dougherty
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https://www.amazon.com/Azorian-Raising-K-129-Michael-White/dp/B008QTU7QY
"Project Azorian: The CIA and the Raising of the K-129" Book
https://www.usni.org/press/books/project-azorian
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PostPosted: Thu Jun 13, 2024 2:45 pm 
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Russian Nuclear-Powered Submarine Arrives in Cuba:

https://www.themoscowtimes.com/2024/06/12/russian-nuclear-powered-submarine-arrives-in-cuba-a85388

It's the Yasen Class Submarine Kazan. Wonder what is the black flag / symbol she is displaying on the side of her sail? Re-posted for ease of viewing, copyright rests with original owner:

Attachment:
AFP__20240612__34WH3EC__v1__HighRes__CubaRussiaWarships.jpg
AFP__20240612__34WH3EC__v1__HighRes__CubaRussiaWarships.jpg [ 306.53 KiB | Viewed 17398 times ]


A dragon perhaps? As that features in the coat of arms of the city of Kazan?


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PostPosted: Thu Jun 13, 2024 8:59 pm 
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Here's a close-up of that flag, posted by Capt_Navy on Twitter and credited to Alexandre Meneghini of Reuters. Resembles some kind of Spartan or other Ancient Greek hoplite with a Swordfish on the shield.


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Kazan flag from Reuters.jpg
Kazan flag from Reuters.jpg [ 411.54 KiB | Viewed 17387 times ]

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PostPosted: Sat Jun 15, 2024 8:42 pm 
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Not as cool as USS INDIANA's Bad Ass Battle Bass, but still pretty sweet.

Dance


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PostPosted: Sat Jul 06, 2024 12:06 pm 
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Timmy C wrote:
Here's a close-up of that flag, posted by Capt_Navy on Twitter and credited to Alexandre Meneghini of Reuters. Resembles some kind of Spartan or other Ancient Greek hoplite with a Swordfish on the shield.


Good stuff Timmy. That answers that! Thanks.


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PostPosted: Thu Dec 05, 2024 12:35 am 
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Takom has released a 1/350 Project 658M (Hotel) SSBN: https://www.1999.co.jp/eng/11135558

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PostPosted: Fri Dec 06, 2024 1:50 pm 
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Wow, I'm impressed, that actually looks quite good. I suspect they used these plans, which I believe are quite accurate:

https://i.imgur.com/nDoI73K.png

Jacob

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PostPosted: Sun Apr 13, 2025 7:46 pm 
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Am I correct to think that the small maneuvering propellers the Russians use are "variable" geometry? That is, they can be planed/rotated for use, and they rotated so the blades are parrallel to travel direction (and lower drag)?


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PostPosted: Tue Apr 15, 2025 3:38 pm 
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Woodstock74 wrote:
Am I correct to think that the small maneuvering propellers the Russians use are "variable" geometry? That is, they can be planed/rotated for use, and they rotated so the blades are parrallel to travel direction (and lower drag)?


There is a photo of the Komsomolets wreck that shows one of the secondary propulsion motors (note these are essentially only for emergency use, like their U.S. and British counterparts):

https://i.imgur.com/Ge0m7OA.jpeg

The blades are rotated to feather as you mentioned, and you can see a circle at the blade root, which is highly suggestive of a controllable pitch propeller.

Jacob

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