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Author Topic: Revell Flower class corvette Snowberry 1/72 restarted  (Read 47799 times)

lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #225 on: January 23, 2022, 10:10:47 pm »

Yes with the exception of sudden changes in  speed which happened with the escorts all of the time. Not great billowing clouds of smoke, (Unless they were laying a screen) but still smoke when the fires were stoked with extra oil to build up the needed head of steam. With steam engines nothing happens immediately.


But in any event it is fun to see in the case of many RC ships.
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lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #226 on: January 23, 2022, 10:30:40 pm »

On another side note:
https://twitter.com/i/status/1355264957433188354

By the looks of it, this was made as number of years ago. She is much more advanced in her restoration now.
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lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #227 on: January 23, 2022, 10:41:30 pm »


Hello Kiyo

You were asking what the cabin at the front of the bridge was the other day. Here is a picture, (If I can get it to work):
https://mobile.twitter.com/LeBrunJames81/status/1282660521582395393/photo/1


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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #228 on: January 24, 2022, 11:30:37 am »

Hi Dreadnought and Jim G;
Thank you for your comments. :-)) 





Hi Lou;
Thank you for the information on a small room of the bridge.
As you had mentioned,it was ASW room.
But I have been thinking that this sort of room might have been set in much lower deck of the hull that would have made it easier to detect the sub sound rather than on high deck.... :((


Kiyo
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Rob47

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #229 on: January 24, 2022, 11:44:34 am »

Deck level makes no difference, as sound transmitted electronicaly, so could be anywhere really, as can be seen in Cruel Sea, it was on same level as bridge


Bob
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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #230 on: January 24, 2022, 01:26:44 pm »

Hi Bob;
Thank you for your teaching me the sub detection.


Kiyo
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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #231 on: January 24, 2022, 01:31:39 pm »

Hi all;


I made another smoke spreader to make more realistic smoke generation as seen in the pics below..
The mesh is a bit finer that is to be set upper in a funnel than first coarse-meshed one to expect broader smoking.
But smoke color is not black.... <:(
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lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #232 on: January 24, 2022, 03:29:54 pm »

But I have been thinking that this sort of room might have been set in much lower deck of the hull that would have made it easier to detect the sub sound rather than on high deck.... :((


The actual sonar/Asdic sound head was located at the bottom of the hull under the 4" gun. The original ones were fixed but later they could be turned, but none on corvettes were retractable. The small room at the front of the bridge was a kind of early CIC where ASDIC, Radar, and radio direction finding information were combined and instantly available to the Captain. An idea possibly a little ahead of it's time, especially on British ships.


Here is what the sensor head looked like and where it was located at the bottom of the hull. (The openings have been plated over on the HMCS Sackville.) The other opening was for the depth finder.





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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #233 on: January 25, 2022, 05:35:15 am »

Hi Lou;


Thank you so much for your additional information on the small room of the bridge in detail.
As you said,this room was truly a kind of so called CIC in this corvette.
But this location being at the front of the bridge seems so vulnerable as to be easily, possibly and seriously destroyed or at least damaged largely even by Cal.50 bullets unless protected.... {:-{


Kiyo
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lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #234 on: January 25, 2022, 06:02:10 am »


But this location being at the front of the bridge seems so vulnerable as to be easily, possibly and seriously destroyed or at least damaged largely even by Cal.50 bullets unless protected.... {:-{

Kiyo


I suppose that is true as I see no indication that it was protected in any way, even with splinter mats. But then corvettes were not really known for getting into running gun battles with Uboats or anything else for that matter. Their preferred method of dealing with Uboats on the surface was to ram them. This happened on a number of occasions with the Uboat always loosing I believe. 


I have seen photos of one incidence where the entire structure was ripped off in rough seas, I assume with the loss of everyone inside!  <:(  But then there is a possibility that the room was not fully manned at that time as in weather that rough ASDIC is pretty useless. Luckily, while we may run our corvettes in weather like that, we won't really run the risk of loosing crew members. :-))
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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #235 on: January 25, 2022, 06:23:19 am »

Hi all;
I am too poor to buy a true lathe and have not encountered the chances to use such nice machine so far. Instead,this time
I "made" temporarily a home-made "vertical lathe" to make a metal main mast for the Snowberry . {-) %% :embarrassed: %) :-))
As the kit -furnished main mast seems so flexible and weak, which is not suitable when setting the rigging work on.....
By this drilling machine modified "lathe",I could have succeeded in making a tapered mast part,though not so good.. {-) ;D
However,it must be better to file the copper rod with this machine rather than doing with only manual work..at least .. O0 %%
1;Test filing ,to begin with, to check if the "lathe" should work properly...at low revolution. Seems OK! :-))
2;Even this humble jig did its job.! {-)
3;Under filing
4;Almost done. The rest will be sanding.!
5;The result is so and so for me as usual.
6;The rest will be sanding and making a final shape as in the kit.
7;Thank you for your cooperation with me and see you if you are required for my model making.!
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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #236 on: January 25, 2022, 08:25:34 am »


Hi all;


I added another smoke spreader to make more realistic smoking which I think OK with this level.
Smoking looks to thick on the table test,but on the water it does not look so much with some reasons as you can see
in the attached video of my HMS Fencer experience.
That's why I adopted double smoke spreader in the funnel to broaden the smoking. :-))
1;From the top view
2;From the bottom view
3/4;The effect of the double smoke spreader...moku moku moku
5/6;Smoking test of HMS Fencer on a table test. looked too thick though..
7/8;Coud be seen like these...Unless smoking is visible,meaningless... {:-{


Following video will show you actually how the smoking looked on the water..which were sooo zoooomed up.. {-) %%
HMS Fencer 1/96 under trial run on June 26 after launched. - YouTube







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lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #237 on: January 25, 2022, 09:53:24 am »

Looks like you have made a very nice mast Kiyo


Years ago I had to do the same thing and i do not own a lathe either. I made mine by fitting smaller and smaller sections of brass tubing inside each section and soldering them into place for the right length and thickness. It has held up well over the years.


Your carrier seems to have just the right amount of smoke coming from the stack.
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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #238 on: January 26, 2022, 03:09:19 am »

Hi Lou;
I have studied some kind of skill to finely file the soft metal rod to form a far better taper than by a manual work
ever done. {-) :-))
Kiyo







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Geoff

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #239 on: January 26, 2022, 05:08:30 pm »

If you have a lathe it is or course easier but you can use an ordinary drill mounted on its side and put a brass rod in the chuck. Either way to stop the piece bending I constructed a piece of wood with a square groove about half the diameter of the rod which supports the rod on its side for most of its length. You then use a file to file the taper on the piece - this works well. You then turn the piece round and do the other end. Its surprisingly easy to get a good match.


If making davits you can leave a lump at the narrow end then file it flat and drill through for the end fitting, and/or anneal it and flatten it out and bend to shape.


This process works well with all metals


Cheers


Geoff
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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #240 on: January 27, 2022, 02:30:17 pm »

Hi Geoff;


Thanks for your useful comment on making tapered rod.
I wish to try in your way in case it should require to make such a tapered rod.


Kiyo
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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #241 on: January 29, 2022, 11:49:57 am »

Hi all;


A little progress as per the kit instructions for today.
With this work,I have passed through page 29 of whole 45 pages of the kit instruction manuals. O0
And nearly 3 months have passed since resuming this build.
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JimG

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #242 on: January 29, 2022, 06:51:33 pm »

To help it look more like a working ship you can turn the cowl vents so they don't face forwards. They would be turned to face the direction the wind was coming from to improve the ventilation to the boiler room.
Jim
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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #243 on: January 30, 2022, 04:55:04 am »

Hi Jim G;
Thank you for your advice.
Frankly speaking,I am ashamed to say that I did not know the cowl vents could be movable to the directions of wind.!! :embarrassed: :o {-) <:(  But I wonder how...that large structures..?


Kiyo
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derekwarner

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #244 on: January 30, 2022, 06:32:30 am »

Kiyo......these cowlings vents have a hobbed rack gear ring & rotation handle  [the model shows this as just a ring] so when the wind was blowing from a certain direction, the MEO [Marine Engineering Officer] would direct the ventilator cowlings be turned and set to face the nominated direction of the prevailing wind to catch whatever volume of air was required/desired for optimal boiler combustion


A few of the Engineering Ratings gathered on the upper boiler deck casing, and adjusted/rotated the vertical tube so the bell mouth faced the directed position....[your image from January the 24th, show this]


So this is the purpose on Flower Class vessels with an early 3 cylinder triple expansion engine. The ventilators on later or newer design vessels went on to have forced draft boiler fans, so the ventilators added the ability to provide an engine room with a positive atmosphere.......but lets not go there as the Flower Class * edit did not have this design facility


Derek   
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Derek Warner

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Backerther

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #245 on: January 30, 2022, 09:44:39 am »

Hi Derek;
Thanks a lot for your kind and detailed explanation of the cowl ventilation system.
Attached pic is so informative on this cowl vents.
But all of the pics of cowl vents I saw so far regardless of ships kinds were facing forward,by which I understood the cowl vents had been fixed on the decks.
So I thought the air taken into the hull via cowl vents was dependant upon entirely by the speed of the ship.... {-) %% :embarrassed: :embarrassed: :embarrassed: :embarrassed: :embarrassed: {-) {-) {-)


Thanks,Derek!


Kiyo

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derekwarner

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #246 on: January 30, 2022, 11:20:16 am »

Kiyo..........


1. Engine Room Space............one of the interesting points is that pairs [stdb or port] of cowling vents can be turned to face the wind, then the opposite side pair face away at 180 degrees from the wind.....then the wind creates a venturi effect and draws hotter air from the *edit engine room space


2. Boiler Room Space..............the general process outlined above does not generally apply as a common use


3. Pressurized Engine Rooms ..the same process applies as from 1. above and the engine room air pressure can be raised by a few PSI.......this doesn't sound a lot, however is sufficient to assist  or direct the elements of an exploding charge <<<< <*< outward <*<  >>>> from the PER

Again, to my knowledge, the Flower Class vessels [irrespective of progressive refit/upgrade] did not use a PER

Derek
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Derek Warner

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #247 on: January 30, 2022, 12:53:01 pm »

Hi Derek;


I am again surprised to know that you have lots of knowledge about the inside structures of hull of a real ship,
as if you were once a sailor man or ship designer !! :o :-)) :D


Thanks


Kiyo
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derekwarner

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #248 on: January 30, 2022, 01:37:28 pm »

Kiyo........possibly the best explanation is having the fortunate, or unfortunate experience of more than 2/3 of a working lifetime directly involved with marine engineering & ships.......from 150,000 tonne Ore Carriers to 5,000 tonne Naval Frigates....[and everything in between]

Essentially shore based, however study, with the occasional trip outside provided the privilege in attaining a little marine engineering knowledge .

The good point is that I do not suffer from any form of motion sickness. :o


Derek
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lmagna

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Re: Revell Flower class corvette Snowberry 1/72 restarted
« Reply #249 on: January 31, 2022, 06:29:47 am »

Thank you for the added information Derek


Interesting to note that the positive air system supplied by the cowlings being turned into the airflow was not considered a forced draft system even though it did, or was capable of supplying a positive air pressure to the engineering spaces and therefore the boiler fireboxes. Airflow over the fires was also affected by the height and shape of the funnel on ships of this type.


It was also good of you to explain that the goose neck funnels could also be turned in a manner that allowed air to be channeled through the engine spaces so that in hotter climates or conditions the hot air could be drawn off and the engineering spaces could also be kept cooler.


I do not remember ever reading anything about corvettes being good cold or warm weather ships. Some warships are very poor warm weather ships, even to the point of crewmen preferring to sleep on deck rather than below. Happened a lot on US ships in the South Pacific.   
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