Part Three - HMS Mersey
In part two much of the construction and preparation work had been completed and the superstructure had been temporarily placed in position along with many of the larger fittings. Other fittings, such as the marker lights, life ring dispenser, deck eye plates and associated marker lights were left till much later in the build, Photo 1.
Some useful aids to building
Before continuing I’d like to mention three of the methods used as aids in identifying parts of the vessel in relationship to the drawings. Photo 2 illustrates a well tried low-tech method whereby photos of the original vessel are ‘Blu Tacked’ as close as convenient to the relevant part on the drawing. I understand that this is not always possible because of availability of photos or access to the vessel but none-the-less it is a very useful aid to building.
Another method gaining favour is in the use of a PC, or laptop, as shown in Photo 3. Pictures can be shown from a CD or those stored on the hard drive and can be brought up for viewing as and when required. There is also the PV or Picture Viewer which retains some of the advantages of a laptop for displaying pictures yet alleviates the need to bring a laptop into a workshop environment. Here pictures of a vessel can be brought up direct from the card / scan disc with individual pictures being selected and displayed as in Photo 4. Having a zoom facility you can go right in to the picture to pick out the fine detail, Photo 5. This in no way replaces the CD or even ‘hard copies’ but it is an additional tool for the job and a less expensive alternative to the PC or laptop, but does have the single disadvantage of only operating with the camera memory card.
One-piece resin moulded crane
Once again and as a reminder Photo 6 shows the stage of construction reached as per last month. At this stage various deck fittings, such as vents can be positioned prior to giving the whole model a primer coat, with Photo 7 focusing on the same position as shown in Photo 6 . Sirmar produce the two distinctive ‘Effer’ type extending jib cranes. This is a one-piece moulding and like much that is resin there is room for enhancing the basic fitting. Photo 8 shows a good view of the crane that is fitted aft. The starting point is to add to the basic seating arrangement. Other item such as hydraulic piping, operating fitments, will to be added later, Photo 9.
Preparation for airbrushing
Mixing the right shade of RN grey can be rather problematic. Modern paints used by the RN have a high degree of reflectivity, so getting the formula right is important to achieve the best results. To circumvent the need to mix, White Ensign produce an excellent range which includes modern RN paint finishes MO-1 light grey and MO-2 deck grey which will be discussed later; both match exactly the shades in current use. Preparation for air brushing follows a well-trodden path where most of the essential deckhouse fittings, as demonstrated in part 2 are fitted into place, Photo 10. For individual fittings the use of short lengths of timber and or a revolving turntable helps in allowing each fitting to be air brushed evenly. The fittings can be mounted on double-sided tape, masking tape or even Blu Tack, Photo 11.
The next stage is to put all of the superstructure temporarily together, Photo 12. Using Photo 13 it will be noted that the open area above the bridge has a glass screen. For the model this was made up using evergreen 1mm sq. strip that forms the screen supports and strips of 10 thou acetate, 4mm wide, and cut to conform with the surrounding edge - being aware the screen slopes outwards, Photo 14.
Deck and deckhouse fittings
Many of the deck fittings such as the bollards and winch can be prepared with each of the bollards and winch gypsies painted in a ‘rust type’ shade to represent that seen in Photo 15 , the results of which can be appreciated in Photo 16. Incidentally none of the deck fittings are positioned until the deck laminate is fitted in place. In part 2 mention was made of the shape of the breakwater (difficult to determine on the drawing). Photo 15 help to define its true appearance. Akin to many ships Mersey has much exposed pipework, ladders and other smaller fittings like bulkhead lights, all of which were fitted prior to painting. A single coat is applied, which can be called a primer coat, but essentially it’s the same paint that will be used throughout the model (see above). Photo 17 shows the results of a single coat with the fittings being highlighted and not submerged as can happen if too many unnecessary coats are applied.
As shown last month the davit arrangement comes as a one-piece moulding but as stated above does not consist of the floodlight at the head of the davit. Also added was the pulley wheel for the topping lift, Photo 18. This can be seen from a position looking aft on the starboard side. Note in the foreground the power pack and controls for operating the davit, Photo 19. The partly completed assembly for the davit arrangement can be temporarily put in place. Note the power pack in this photo which is made up from styrene strips and aluminium tube seen to the right in Photo 20.
Further aft on the main deck
Moving aft on the main deck is the opening and stairway down to the cargo deck. Once again all of these fittings are temporarily placed in position, Photo 21. However for those wishing to build one of the River class I’ve included a detailed photo of the area adjacent to the stairway opening. As you can see there is more detail to add. In fact having such pictures can be an advantage or a curse as there is so much that has to be taken into account. The hose dispenser is but one example, Photo 22.
Life raft dispensers and vents
The construction of these was shown in part 2. Photo 23 however shows the frame in detail.
The areas covered thus far can be appreciated in Photos 24 and 25. There are a number of items that are best left until a later stage. For example the large vents seen just beneath the walkway around the uptake. Sirmar/PSShips provide these as part of the fittings pack, Photo 26, and can be prepared using a mix of Humbrol Matt 94 and 180 for the vent panels and Humbrol 11, metallic silver, for the outer frame. The results of this can be seen in Photo 27 with two of the vents set in place. Note the effect of the light conditions on the paintwork.
Fitting out the bridge and glazing
Originally the aim was to just glaze the bridge windows and fit the wiper blades, leaving aside interior fitting, as it was assumed these would be hidden. However on viewing a picture of the bridge it became clear that part of the interior was indeed visible. The reason for this is simple. The interior is fitted out with control consoles finished in a bright blue coating, clearly visible from the outside, Photo 28.
Glazing the bridge windows.
Glazing can become a problem as any adhesive, even Clear Fix, can be seen if exposed on the acetate glazing. The solution was to make window frames that the acetate sheet cut to size could slide into, and the frame sealed in place, Photo 29. The glazing fits between the horizontal members whilst the vertical sections slot tightly into place against the acetate. A very small drop of styrene cement is applied to the back of those joints. No adhesive whatsoever comes into contact with the acetate. Each of the control consoles were made (not accurately I hasten to add) from styrene sheet. So long as they were just visible from outside they would fulfil their purpose. Accuracy here was problematic as much of the real detail is certainly invisible when viewing from the outside, Photo 30. Thus only the bare outline painted blue (Humbrol 25) was necessary. Of course the interior could be taken that one step further but the top of the bridge would have to be removable, which was not considered practical.
The hull was air brushed for a second time and left to dry. Unlike the Humbrol paints WEM enamels are based on a different formula and require no thinners. However the curing time can be as much a six hours. In so doing the preparation for the anti foul did not take place for at least 24 hours. The underside of the hull was made ready to receive the Humbrol 73 (matt wine), the prop end of the shaft was sealed and the hull was given a light rub down with flour paper, Photo 31.
Marking out the position of the anti foul is a straightforward task. Here simple tools are used together with the drawing to set the exact level of the anti foul up the side of the hull, Photo 32. The hull is placed on a level surface and the pencil is used to mark various points along the hull. A low tack tape (Tamiya type) is used with the tape being fed from one mark to the next. At first it may not look at all level but if the hull is on a level surface it will in fact be correct, Photo 33. The upper part of the hull can be covered over with the underside now ready to be coated with Humbrol 73. It’s worth noting that the hull is lifted well clear of the work bench, Photo 34. That’s it for part 3. In the concluding part of this short series there are more tips on finishing, presentation, making a simple carry case and of course the all-important sea trials.
References and AcknowledgementsWHEC 33 Duane; ref. Ships and Aircraft of the US Fleets 13th edition by Norman Polmar, pages 501 to 502.
US Warships of WW2 by Paul H Silverstone, pages 373 to 375.
Furieux; ref. Conway’s All The World’s Fighting Ships 1860 –1905, page 300.
TF 72 Australia – Michael Brown.
First published in Model Boats number 4, April 2007
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