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Author Topic: HMS Brocklesby semi scratch build  (Read 166710 times)

spooksgone

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Re: HMS Brocklesby semi scratch build
« Reply #400 on: April 12, 2016, 01:33:19 PM »

Thanks for that Joe. I will try to locate the slide transfers, sounds a better bet. Thanks again Joe.
Phil
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radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #401 on: May 19, 2016, 04:33:57 PM »

Right now my little fun boat is finished I'm getting back to Brocklesby, I don't think it's a bad thing to have a break from a long build, but now carrying on from where I left it doing some of the detailing on the superstructure before spraying the primer, so cast some deck lights and making up some vents and fitted the fly deck supports.
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ballastanksian

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Re: HMS Brocklesby semi scratch build
« Reply #402 on: May 19, 2016, 04:41:55 PM »

Hi Phil,  pennant numbers from BECC also,, I tend to over look draught markings, I did try some on my T42 but in my opinion they stood out too much so I removed them, I know some guys use the slid transfers and then clear varnish the whole hull to lock them in, but varnishing the hull is not something I do,

By rights the gloss varnish should be applied before and after the decals are applied as this prevents silvering which is where diddy air pockets are formed in the matt/uneven surface of the primer and matt paints used under the decal. It also provides a good sound surface on which to apply washes and weathering. Johnsons Klear or Future floor polish is a very popular medium as it is water based but very resiliant to knocks as you would want a floor polish to be:O) You can even airbrush it :-))

Rule of thumb is:

Gloss varnish

Decal solution

Decal

Decal solution to soften decal and get it to go around raised details. In military modelling this could be grilles or anti mine paste (Zimmerit)

Varnish Gloss or Matt
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ballastanksian

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Re: HMS Brocklesby semi scratch build
« Reply #403 on: May 19, 2016, 04:43:07 PM »

Watch out, Joe's got the soldering paste out again!!!! Seriously though, those supports look excelllent.
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Starspider

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Re: HMS Brocklesby semi scratch build
« Reply #404 on: May 19, 2016, 05:30:47 PM »

the drains from the deck look rather nice as well with some very neat radii and neat soldering  :-))
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radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #405 on: May 21, 2016, 03:51:00 PM »

As always thanks for your interest guys,
The task I set myself today on Brocklesby was the curious vertical drop sonar on the front of the wheelhouse, the dome was made by making a mould out of lite ply and heating a piece of .5mm styrene and pressing it over the mould, the rest was just to make it look something like the drawing, standing half way across the workshop eyes half closed it looks close enough. %%
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ballastanksian

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Re: HMS Brocklesby semi scratch build
« Reply #406 on: May 21, 2016, 08:17:12 PM »

You would think that the sound waves would bounce off all the deck fittings etc.
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radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #407 on: May 21, 2016, 08:39:30 PM »

As far as I can make out the cable goes down though a duct and out the bottom of the hull, like I said it is a curious looking bit of kit, some bits of detailing for me is monkey see on drawing, monkey puts on boat.  %% %% %)
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ballastanksian

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Re: HMS Brocklesby semi scratch build
« Reply #408 on: May 21, 2016, 08:43:14 PM »

Oh, so it is the cover of a cable winch and not a dish. Makes sense now especcially as SONAR is a wet thing and not RADAR.

I'm a daft biffer :D
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Netleyned

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Re: HMS Brocklesby semi scratch build
« Reply #409 on: May 21, 2016, 08:50:53 PM »

Is it not a cover to be lowered to seal the opening if the dome needs to be lifted inside the hull.


Ned
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Jerry C

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Re: HMS Brocklesby semi scratch build
« Reply #410 on: May 21, 2016, 08:59:45 PM »

When operating the sonar the transducer is lowered out of the bottom of the hull contained in a rubber dome inflated by fresh water. When not operating the transducer is retracted, the fresh water pumped out thus collapsing the dome into the hull. The whole lot is then covered with the GRP dish like cover you show on deck. This protects the transducer and streamlines the ship.
Jerry. Ex MHDO.

ballastanksian

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Re: HMS Brocklesby semi scratch build
« Reply #411 on: May 22, 2016, 09:03:38 PM »

Thanks for the explanation Jerry. A very clever idea. Does the fresh water also improve detection capability? Brine and fresh water have different densities.
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Jerry C

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Re: HMS Brocklesby semi scratch build
« Reply #412 on: May 23, 2016, 08:27:18 AM »

The transducer needs to be in contact with the medium it is sending the sound waves through to work efficiently, however salt water is harmful to the mechanics hence it sits in freshwater. The sound is hardly attenuated by the dome material itself. Sound travels at a different speed in fresh water than it does in salt. This is allowed for in actual use. When transducer is down when mine hunting the vessels speed has to be kept below a certain level to keep the dome inflated and stop damage. The active rudder/ propellor operation achieves this. The transducer has to be retracted and the cover replaced before full speed can be used.
Jerry.

radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #413 on: May 24, 2016, 01:22:48 PM »

The task today was the two aerial bases on the wheelhouse front, I thought these would be better made solid so they can be drilled for fitting the aerial later, it's getting near to painting the superstructure.
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warspite

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Re: HMS Brocklesby semi scratch build
« Reply #414 on: May 24, 2016, 07:44:27 PM »

So- how do they fit the cover, its on deck, does this mean someone has to dive below the waterline to secure it in position.
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radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #415 on: May 26, 2016, 04:29:20 PM »

No idea Warspite, like I say for some equipment on warships for me it's Monkey see, Monkey do.

Got some primer on the superstructure today so that's all the ply and white styrene gone, they say paint covers a multitude of sins but it can also work the other way round, drops of glue you never noticed before spraying become Ben Nevis, so I've got more prepping to do before top coat but then it is a warship and IMO actually look better somewhat less than perfect just like the real thing.
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SailorGreg

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Re: HMS Brocklesby semi scratch build
« Reply #416 on: May 26, 2016, 10:07:35 PM »

Looking good Joe.  It always delights me the difference a coat of paint makes.  All those different pieces suddenly become a coherent whole and a model emerges.  Not long now until she gets wet.

Greg

Capt Podge

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Re: HMS Brocklesby semi scratch build
« Reply #417 on: May 26, 2016, 10:36:02 PM »

drops of glue you never noticed before spraying become Ben Nevis.

That's true enough - adds a fair bit of time and effort to the build as well.

Still - progressing well Joe. :-))

Regards,

Ray.
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Z750Jay

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Re: HMS Brocklesby semi scratch build
« Reply #418 on: May 27, 2016, 08:58:45 AM »

Her she is in the ship hall
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radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #419 on: May 27, 2016, 10:09:15 AM »

Thanks for that Jay, it's good to see they have decided to keep her in service I believe there was some doubt about this after her pre refit survey when they found cracks in her A frames.
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Z750Jay

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Re: HMS Brocklesby semi scratch build
« Reply #420 on: May 27, 2016, 10:21:59 AM »

Now we are using the Shed for the minesweeper refits we are no so dependent on the weather. It also might be dues to the fact that there is not much work on in the yard at the moment as we are still waiting for the new shore establishment, sorry carrier to arrive so anything to keep us not sat around all day is good
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radiojoe

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Re: HMS Brocklesby semi scratch build
« Reply #421 on: May 27, 2016, 10:35:57 AM »

Well at least a close resemblance, you have to imagine the shed.
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Z750Jay

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Re: HMS Brocklesby semi scratch build
« Reply #422 on: May 27, 2016, 10:40:50 AM »

Nice, just a lot cleaner, tidier and less battered!



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Capt Podge

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Re: HMS Brocklesby semi scratch build
« Reply #423 on: May 27, 2016, 10:14:10 PM »

It's not very often we get to see comparison pictures like that - nice one Jay.

And your model is looking super Joe. :-))

Regards,

Ray.
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Z750Jay

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Re: HMS Brocklesby semi scratch build
« Reply #424 on: May 27, 2016, 10:19:29 PM »

took a photo of the pic in our internal BAE mag.Will keep an eye out for any more
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