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.
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.
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
Delta III 5 blade screws
Papa 5 blade screws
Last edited by Tom Dougherty on Thu Dec 14, 2023 10:10 am, edited 1 time in total.
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:
A dragon perhaps? As that features in the coat of arms of the city of Kazan?
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.
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.
Under Construction:
1/350 Typhoon
1/350 Skate
1/350 USS Nautilus
1/350 Tang
1/350 November
1/350 Hotel II
1/350 Alfa
1/350 George Washington
1/72 Type VIIC
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)?
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):
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
Under Construction:
1/350 Typhoon
1/350 Skate
1/350 USS Nautilus
1/350 Tang
1/350 November
1/350 Hotel II
1/350 Alfa
1/350 George Washington
1/72 Type VIIC
Woodstock74 wrote:The cross section on the IronShipwrights model appears like a horizontal oval. It looks very odd. Is this correct?
The outer hull cross-section should be approximately circular like the drawing shows, so that looks way off.
Jacob
Under Construction:
1/350 Typhoon
1/350 Skate
1/350 USS Nautilus
1/350 Tang
1/350 November
1/350 Hotel II
1/350 Alfa
1/350 George Washington
1/72 Type VIIC
Woodstock74 wrote:The cross section on the IronShipwrights model appears like a horizontal oval. It looks very odd. Is this correct?
The outer hull cross-section should be approximately circular like the drawing shows, so that looks way off.
Jacob
Hi Jacob,
The plans posted show a Project 945 boat (Sierra 1), while the kit posted is the Project 945A boat (Sierra 2). The Sierra 2 hull is 6.7 feet wider than a Sierra 1, as well as 8.5 feet longer, (40.3 foot beam and 351.6 foot length for the Sierra 1, 47 foot beam and 360 foot length for the Sierra 2) with the same vertical height. This will show the cross section to be oblong along the y-axis when viewed from the bow rather than somewhat circular with the Sierra 1 viewed from the bow.
The plans posted show a Project 945 boat (Sierra 1), while the kit posted is the Project 945A boat (Sierra 2). The Sierra 2 hull is 6.7 feet wider than a Sierra 1, as well as 8.5 feet longer, (40.3 foot beam and 351.6 foot length for the Sierra 1, 47 foot beam and 360 foot length for the Sierra 2) with the same vertical height. This will show the cross section to be oblong along the y-axis when viewed from the bow rather than somewhat circular with the Sierra 1 viewed from the bow.
Jon
No Russian source I have mentions any difference between the beams of the Sierra I and Sierra II; both have the same beam of 12.2 m (40.0 feet). Where did you get the 47-foot figure? I don't see any evidence for this in drydock photos or drawings.
Jacob
Under Construction:
1/350 Typhoon
1/350 Skate
1/350 USS Nautilus
1/350 Tang
1/350 November
1/350 Hotel II
1/350 Alfa
1/350 George Washington
1/72 Type VIIC
