Classic Airframes' 1/48 scale
GAF Canberra Mk.20

Part One - Construction

by Brett Green

Classic Airframes' 1/48 scale Canberra will be available online from Squadron

For a detailed examination of the contents of Classic Airframes' 1/48 scale Canberra, see the in-box review elsewhere on HyperScale.

It was a pleasant surprise to see the Australia Post courier pull up outside our house on a Saturday afternoon in early April. I have only ever seen these couriers working on weekends on the two Saturdays leading up to Christmas so it was completely unexpected.

When I saw that the contents of the box was Classic Airframes' new Canberra, it seemed to be further evidence that Christmas had come very early.

We had a busy day that Saturday but I dropped everything on Sunday and got cracking, first photographing sprues for the review, then preparing resin and plastic parts and, at last, assembling.
 

Parts Preparation

I was lucky enough to receive some of the earliest sprue shots for this kit. The plain USPS box contained grey styrene, resin, clear canopy parts and decals. Instructions and one set of clear parts (with wing tip and landing lights) were not available at this early stage. Even so, these minor omissions were not going to stop me from building this kit straight away.

The absence of instructions meant that I spent a little more time than usual familiarising myself with the plastic and resin parts.

I started by cutting off all the plastic parts and cleaning up the sprue connector points. This proved to be a very fast task as there are only 42 parts, although some of these are very large!

Next, I took to the resin parts. Some of the casting blocks are quite stout, so this time I decided to use a grinder attachment in my Dremel motor tool for this task. I ran an extension cord outside, brought along a container of water to keep the resin parts wet (to reduce dust), donned a respirator mask and started work. Properly prepared and with this power tool, the casting blocks were off in no time at all. Even with the resin parts damped down, however, there is a lot of flying resin dust so, if you plan to use a motor tool for this job, I strongly recommend that you do so outside and wearing some form of face mask.

Wings

Construction started with the wings, as the resin gear bays are one of the more challenging areas that I like to work on early.

Once the excess resin is removed from the top of the resin gear bays, they fit inside the thick Canberra wings without further preparation.

Trailing edges looked a little thick so I scraped the insides and gave them a sanding before assembling the wings. The big wing halves mated up quite well considering the absence of locating aids. I had a little overhang (top wing over bottom wing "overbite") on one wing, but it was easily sanded to shape. I sanded the trailing edges again after assembly to improve the appearance of this area.

Cockpit

Next was the cockpit. This is made up of a well-detailed jumble of resin and plastic parts, including two ejector seats. I checked some of my own reference photos to confirm locations of bulkheads and details, as kit instructions were not included with this early test shot. The angled front of the rearward-facing navigator's position was quite rough where I had ground off excess resin, so I covered the scarred surface with thin plastic sheet.

The interior parts received a coat of Tamiya Flat Black, followed by some restrained dry brushing with dark grey and medium grey. Details were picked out in white, yellow and red paint. Instrument lenses were filled in with semi-gloss black. The navigator's station is a real work of art in resin, but the position is so well hidden that I decided not to install the seat here. I still painted up the instruments though - at least we can see it in the photos! The seats are beautifully detailed, by the way, with harnesses and oxygen hoses cast in place. The resin control yoke is a delicate jewel too.

Click the thumbnails below to view larger images:

The resin forward wheel well features gorgeous detail. This part is glued to the rear cockpit bulkhead and the main cockpit floor.	After painting and several rounds of test-fitting, the cockpit components are installed in the port side nose half.	The floor had to be reduced in width to permit the two halves of the nose to fit without gaps.

Fuselage and Airframe Assembly

With all the cockpit elements prepared and painted, I found the best place to start assembly was the rear bulkhead.This is glued to the forward wheel well, which sets the angle perfectly.

I then glued the cockpit floor to the front bottom lip of the rear bulkhead. This wheel well / bulkhead / floor assembly was glued to the port sidewall. Now, the pilot's position was slid, without glue, into the opening under the instrument panel. I test fitted the instrument panel bulkhead on the sidewall and, when I was happy with the position, I simply ran liquid glue along the join on the sidewall. There was still a little play in the resin pilot's position, allowing the bottom to be carefully lifted with a toothpick. A spot of super glue was applied under this part to secure the resin to the floor. The last major cockpit component was the bomb aimer's position in the tip of the nose. This was glued to the floor and the port sidewall. The remaining cockpit parts - control column, pump handle etc - were installed at this stage.

Test fitting showed that the cockpit floor was a bit too wide to permit the forward fuselage halves to meet, so the side of the floor was thinned and trimmed until a gap-free result was possible. This is not difficult, just an exercise in trimming, sanding, test-fitting and repeating until the nose halves fit properly.

The long main fuselage halves came next. I test-fitted the halves and the fit looked so good that I decided to apply liquid glue along the top seams there and then. The fit of these big chunks of plastic is perfect with no additional work after cleanup.

The engine nacelles will also fit well after a bit of trimming and sanding of the intakes and the leading edge of the wings. Once again, patience will be rewarded with a gap-free and (almost) step free result. I found that there would be a step where one intake met the wing nacelle, so I used a short length of sprue as a spreader. This eliminated the step prior to assembly.

Click the thumbnails below to view larger images:

The leading edges of the wing were sanded to blend in the "shoulders" of the intake inserts, the result being no gaps and no steps.

Classic Airframes supplies two wing spar rods to secure the big wings to the fuselage. The holes for the spars in both the wings and the fuselage were partially flashed over, so I reamed them out with a rat-tail file. I also sanded the mating surfaces of the wings to ensure that they sat flat against the fuselage. I fed the spars through the fuselage and attached the wings to either end using super glue, effectively tacking them in place. Tamiya Extra Thin Liquid Cement was then flowed into the upper and lower seams at the wing root. The fit was once again very good, with almost no gaps and absolutely no steps on the upper surface, and only narrow and very manageable gaps on the lower joins.

At this stage, the angled horizontal tail surfaces were assembled. Holes were drilled for brass rod spars, and these were also secured to the fuselage using super glue. Tamiya Liquid Cement finished the job once the correct dihedral was set. There is a small gap at the top and bottom of the stabilisers, but these will be quickly despatched with a line of Gunze Mr Surfacer.

So far so good. Now for the most important join on the model - the nose to the main fuselage. Comparing these parts showed a slightly different cross-section on each mating face. The sides of the nose section were slightly "bulged" compared to the main fuselage. This would result in an unsightly step without remedial action. I would rather do almost anything other than filling and sanding, so I took some preventative measures. I installed a spreader bar from plastic sprue in the front of the main fuselage section. I trimmed the piece of sprue until the cross-sections of the nose and the main fuselage matched.

The undercarriage of the Canberra sits quite a long way forward, so I installed lead weights in the rear of the nose (behind the rear bulkhead) and in the forward fuselage. Even so, these five large lead weights will not be enough to keep this big model on its nose gear.

I marked datum points on the middle top of the nose and the fuselage, then applied a spot of super glue on each inside lip of the kit nose. I slid the nose section onto the fuselage and applied a spot of accelerator to tack the assemblies in the correct position. A final stronger bond was achieved using liquid glue along the join line. Despite my preparations I still I wound up with a slight step at the bottom of the port side. This step was bridged with Milliput and sanded flat. Panel line detail was restored before painting.

Next time I will probably glue each front nose half to each main fuselage half before installing the cockpit components and joining the fuselage halves. By using this method, it should be possible to perfectly align the nose and fuselage parts.

After assembly, I found that I had enough room to install another three weights in the Navigator's position behind the pilot. Lucky I did not install that ejection seat earlier! I painted the large weights flat black before gluing them into place. Finally, there was enough weight to keep the nose down.

 

In little more than ten hours, I have the basic airframe of this classic British bomber completed.

My impressions at this stage are pleasant surprise and satisfaction, both at the model's large size, and also due to the speed of assembly. The fit is generally sweet too, assuming parts are properly prepared and some time is taken to test fit and trim in the areas I have mentioned above.
 

Continued in Part Two

Model, Images & Text Copyright © 2006 by Brett Green
Page Created 04 April, 2006
Last Updated 02 May, 2006

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