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PostPosted: Thu Feb 11, 2010 10:56 pm 
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PostPosted: Thu Feb 11, 2010 11:20 pm 
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I think Tony Bunch uses/used just such a refillable compressed CO2 canister for his airbrushing.

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PostPosted: Fri Feb 12, 2010 12:33 pm 
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Bob a friend of mine uses a nitrogen bottle with regulator. its around $50 to get filled and usually lasts him around 5 years.


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PostPosted: Sun Feb 21, 2010 6:23 pm 
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PostPosted: Sun Feb 21, 2010 6:30 pm 
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Re. starboard side: I must confess that I can't see the platform extension that's under the boat, even when tilting my LCD display to lighten the area - it seems quite an empty space to me! Regardless, it is at least better than the kit part :D

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PostPosted: Sun Feb 21, 2010 9:55 pm 
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PostPosted: Sun Feb 21, 2010 10:01 pm 
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Ah, you're right of course, and I see a hint of that ledge here: http://www.navsource.narod.ru/photos/02 ... 165054.jpg

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PostPosted: Sun Feb 21, 2010 11:49 pm 
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Bob,

Wow....it really is an airBRUSH!!!!! For over 40 years I thought I had a miniature air powered spray gun. Blown away again.

Jim

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aux viewtopic.php?f=59&t=40896

CV-3 viewtopic.php?t=39515&p=263120#p263120

CV-6 viewtopic.php?t=33201&p=201342#p201342


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PostPosted: Mon Feb 22, 2010 4:18 am 
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Great job again Bob.

The extension of the boat deck is a necessity on both sides because at sea, davits are helt in place by securing pins, large diameter steel rods, to avoid the davit (and boat) from going over unwantedly if the winch gives way or the wire breaks (boat is lashed to the davits, so even if the wire gives way the boat sits stuck to the davits. In some cases the boat does tip over if it happens. In fact I think these boats have cost more lives during drills than actually saving them during emergencies...

The reason for the smaller davit and boat on portside is that that boat is not really a lifeboat. It's a rescue boat/ admiral's launch, that means there are different rules regarding their placement and securing. You have to be able to embark the lifeboat and go together with it in the water. For a launch you can just launch it, without people inside (attached with a rope of course and embark it by pilot ladder or similar means), or bring it to deck level and embark there before finally going in the water.

I'm onboard at the moment and I thought I'd share something about these signals with you guys. Here is a picture of the normal light arrangements on a ship. Showing the Christmas tree on the right and the regular navigation lights on the left. N.U.C means "Not Under Command" (when your rudder or engine are broken). Red Flashing Light is only used for dangerous cargo in Japan. The regular Red light, which is switched on in this case, is a dangerous cargo light in the rest of the world (Bravo/Red flag during day time)
For the rest you can see the two anchor lights switched on, as we are at anchor at the moment. Most of these lights can be found on all ships, including warships.


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PostPosted: Mon Feb 22, 2010 7:40 pm 
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PostPosted: Fri Feb 26, 2010 7:17 pm 
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They are actual replacements for each other. The navigation lights should be carried from dusk till dawn, while the daymarks are carried from dawn till dusk. For example the anchoring case, you won't spot any white light during the day, instead, the black ball, which is much more contrasting with any other colors, is used during the day. During night you won't spot any balls, so a light or two (depending on length) is replacing it (daylight, irrespective of length is only 1 ball).
There is not always such a logic in it. Two red lights, not under command, is replaced by two black balls. Sounds logical, three red lights, vessel constrained by draught, is represented by a black cilinder... Where's the logics there?
There are a couple of other cases where the daymarks differ from lights, so practically you really have to learn them case by case.
For warships however you'll get far enough with the basic anchor ball and restricted in ability to manoeuvre. Towing, fishing and others aren't quite important.
Another well known, more in mine clearance operations is the blue-white Alpha flag, which indicates that the vessel or boat has a diver in the water.

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PostPosted: Sat Feb 27, 2010 9:35 pm 
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PostPosted: Thu Mar 04, 2010 7:37 pm 
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Last edited by carr on Tue Jul 02, 2019 8:20 pm, edited 1 time in total.

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PostPosted: Fri Mar 05, 2010 1:34 am 
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Bob, from my scale plans which I obtained while in Moskva visiting my family, the props angle back towards the stern as in your drawing "A"
The props also do not have the normal bullet shape spinner but have what I would describe as four flanges.To explain it,it simply looks like the end of a masonary drill bit has been added to the spinner shape. I hope you undertsand what I am trying to descibe?
I am about to scratchbuild the " ПЕТР ВЕЛИКИЙ", Peter the Great in 1/200 scale and I am about to begin the hull. I will build the basic superstucture from lexan which will be laser cut to specs.The rest mainly scratchbuilt but I have a contact in Russia that has casted many parts from resin for his own scratchbuilt version which he will cast up for me.
They are beautiful ships and look even more spectacular in 1/200 scale.


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PostPosted: Fri Mar 05, 2010 3:31 am 
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cunumdrum61 wrote:

The props also do not have the normal bullet shape spinner but have what I would describe as four flanges.To explain it,it simply looks like the end of a masonary drill bit has been added to the spinner shape. I hope you undertsand what I am trying to descibe?

That certainly explains what I see in the picture! I was trying to figure out why the port spinner appeared so square against the bright background, and now that I look closer, I can see the same with the starboard spinner.

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PostPosted: Fri Mar 05, 2010 4:07 am 
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The spinner looks almost identical to this prop from a model of the Akula class sub.
I hope this helps.
Here's the link: http://www.scaleships.biz/images/akula/akula21.jpg


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PostPosted: Fri Mar 05, 2010 4:37 am 
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carr wrote:
Greetings,

I'm trying to get all the major pieces of the superstructure assembled prior to attaching the whole thing to the deck. The next area of concentration is the after most boat deck. There are two boat decks, one forward and one aft, separated by a large support pillar (the large rectangular object to the far right). Here is a view of the actual area. It's kind of cluttered and hard to see. I've studied many photos, cross-checking shapes and relative sizes.

Image

Note that the deck has several extensions of varying size. I've outlined them in heavy white lines in the next photo.

Image

With this in mind, here is the kit part placed loosely in its position. Note that the shape does not match the photos. Now you just know I'm going to remedy that!

Image

Here is my scratch built, corrected piece also placed loosely in position. Note the difference in shape.

Image

Here's a side by side comparison of the kit's boat deck and mine.

Image

While I'm nosing around the boat deck, I've noticed that the davits are incorrectly represented. Note that the real davit is a two piece affair with an upper piece that holds the boat and, when released, slides down the lower support, then tips out over the water. Here is the same original photo with heavy white lines showing the angles and pieces of the real thing. You may want to refer back to the first, unaltered photo to get an unobstructed view of the davits.

Image

Now compare the above davit to the kit part shown below. Again, you know I'll be scratch building a replacement in the future.

Image

By the way, the preceeding discussion applies only to the starboard side. The port side is quite different. In fact, although I haven't given it a final scrutiny, it appears to have no boat deck, at all, even though the kit has both sides being almost identical. On the ship, the boat is a different style from the starboard one and the davits are a different type, being about half the size. Here's a photo of the port side. Compare it to the starboard side in the first photo above.

Image

Work continues. Enjoy.

Regards,
Bob


Bob,
You are correct. This boat " Командирский Катер" or captains boat it would be called in English does not have a platform under or behind it.It only supported by the divitts. Your reseach is correct and your scratchbuilt boat deck is almost perfect to my drawings. Excellent work.


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PostPosted: Fri Mar 05, 2010 9:04 am 
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PostPosted: Fri Mar 05, 2010 5:37 pm 
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Actually the tip of the blade goes towards the bow, well actually it ends up nearly perpendicular to the longitudinal axis. Case C is the most correct I suppose.
This is to reduce the load on the prop tips and to have less water going in a vortex rather than going straight backwards. Unless I understand your case the wrong way of course. Try to contact EJ Foeth on this matter, he's a world famous prop specialist AND he's a member of this forum!

The centre hub is what they call a Vortex Attenuator, the normal bullet shape is more efficient, but allows for a vortex formation which causes noise. The "cross" in the centre, as can be seen on most Russian ships, disturbs this vortex formation and causes a more silent propellor. Be it at a cost of x% in propellor efficiency. (The other type of vortex attenuator is a more or less reversed conical shape, as can be found on the original six blade prop of the U212 submarines)

One note must be made here though, the Peter the Great has received new propellors a couple of years back, I think around 2005 or so, I can look the article up if you want. A brand new type of propellor, I'm not sure if this is the new or the old prop... If it's the new one, then you have a problem of course :heh:

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PostPosted: Fri Mar 05, 2010 5:50 pm 
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