web analytics



BAC Eagle B(PR).Mk1 scale model aircraft

26 Apr
2012

BAC Eagle B(PR).Mk1 scale model aircraft,army model kits

To avoid going over ground covered in other journals, the main emphasis of this article will be on the use of three after-market sets released for the Airfix TSR.2. Not wanting to depict one of the prototypes, I chose to portray a BAC Eagle B(PR).Mk 1 (well, that’s what I’m calling it) as it might have appeared early in its career. A limited release for use that did not extend to the carriage of external stores or permit inflight refuelling is assumed, hence the ‘clean’ airframe. Except for replacing the ejection seats, my original intention had been to build ‘from the box’, but this changed with the first parts worked on, the intakes, which are poorly moulded and have an unrealistic duct interior. Concurrently CMK released a set with replacement intakes so, rather than trying to correct the kit, I decided to go the resin set route and ended up purchasing two CMK sets and one from Pavla.

The primary items in the first CMK set (Photo 1) are the replacement intakes (which have openings for the auxiliary inlets) and jet pipes. There are FOD guards for both of these, but to fit superior parts only to cover them seems rather self defeating, and I feel these are best

BAC Eagle B(PR).Mk1 scale model aircraft,building model planes
BAC Eagle B(PR).Mk1 scale model aircraft,jet model airplane

used on a model that has the kit components. The second CMK set (Photo 2) has replacement airbrake components and tailplanes together with separate wing and tailplane flaps. Photo 3 shows the main items of the Pavla cockpit set post priming. The three cockpit transparency sections (not shown) are included in the same, but with only one example of each.

Items from a fourth resin set appear in

BAC Eagle B(PR).Mk1 scale model aircraft,model plane shops BAC Eagle B(PR).Mk1 scale model aircraft,model aircraft association

some of the photographs, these being Red Beard and WEI77 bombs. This set is by Belcher Bits and contains all five of the free-fall nuclear weapons of British origin fielded by the RAF and Royal Navy. The Belcher Bits Red Beard is better than the Airfix example, but requires some correction of its nose shape.

Construction – the fuselage

Fine steel tubing was used instead of the kit pitot probe and pitot head. A plasti-card disc was fitted inside the radome to support the probe. A piece of brass sheet superglued into a slot (Photo 4) was substituted for the kit part in order to represent the undernose UHF aerial. The weapons-bay doors were fitted closed because the bay interior is devoid of detail. A structure of plasticard was built within the bay to support the doors, thin strips of this material also being super-glued to extend the doors’ forward ends because they are both slightly shorter than the bay. The fuselage surface immediately aft of the bay is not level with the doors so the area was filled and the ends of the doors represented by engraved lines.

Just about every photograph of prototype XR219 on the ground shows the undercarriage doors closed, and this is how they were fitted on the model. To support the main gear doors, pieces of plasticard (highlighted in ink) were fixed around the edges of the wheel bay (Photo 5). The kit’s nose gear doors were too narrow to be used, so a piece of plasticard was substituted. This was shaped to the required form and the joint between the doors represented with an engraved line. Test fits of the fin showed that the contour of its base did not match the fuselage, the main reason being that it fouled a projection on the rear fuselage. Their relative positions are correct, but a short portion of the base of the fin above the projection is not slightly angled as it should be.

It had been hoped that the Pavla windscreen section would have corrected one of the kit’s faults, but this was not so. The problem is that the recess for the pilot’s canopy and windscreen is too long and is also at the wrong angle (Photo 6). If the canopy is put in place and the windscreen section held against it, the forward edge of the screen is raised compared to its correct position. To overcome this, strips of plasticard were built up on the cockpit edge (Photo 7), trimmed back after the windscreen was fitted and Milliput applied to fair in the screen. This exercise was not without its difficulties and, although the side profile of the nose and canopy now match the drawings of the TSR.2 in SAM, the form of the area beneath the windscreen quarterlights may not be quite correct.

BAC Eagle B(PR).Mk1 scale model aircraft,1 16 model

Had optical characteristics been the governing factor, the Pavla transparencies would have been used, but with open canopies their edges would have been unrealistically thin. In their place, the kit canopies, which are closer in scale thickness to the real thing, were fitted. Another reason was that a robust windscreen was needed in view of the work described immediately above.

The air-conditioning system outlets beneath the engine intakes and the boundary-layer bleed duct vents on the upper fuselage were opened up. The latter are a poor depiction of the original because the forward step should rise to be level with the fuselage upper surface. They were modified by applying and shaping Milliput (Photo 8). Although only a small change, this made a significant improvement to the realism of this area.

Fitting the resin sets

The leading edge of the CMK intakes was flat, so their interior face was sanded down to produce a sharp lip. When fixing them to the fuselage their position in the vertical plane is most important because it affects the junction of wing, upper fuselage and intake. Establishing this was not helped by their height being 1 mm less than the kit parts (compared to SAM’s drawings, Airfix got it right). They were mounted slightly high and the underside of the fuselage adjacent to the intake sanded down to eliminate the step that was present. 10-thou plasticard was used for the plates that fit between intake and fuselage side (Photo 8). To get the port intake shock cone to fit correctly, some material had to be removed from its inner face (Photo 9). To provide a secure mounting for the auxiliary inlet doors, pins were fitted and inserted into holes drilled in the intake wall (Photo 10). 0.2-mm diameter plastic-coated wire was used for the actuating links (Photo 11).

The replacement jet pipes are a straightforward fit into the rear-fuselage ‘boat tail’ fairing (Photo 12) and their corrugated liners (Photo 13) add a worthwhile touch of realism. This set also has replacements for four small fairings mounted on the upper rear fuselage. From the SAM drawings it could be seen that the locating holes for the foremost pair are too far aft.

To fit CMK’s wing flaps, sections of the wing’s lower surface have to be cut away. To define the cutting line the resin replacements were clamped in place and the boundary between kit and replacement part marked with a knife blade (Photos 14 & 15). With upper and lower wing sections held together, the resin parts were then tacked in place along their joint with the lower section (Photo 16). On the wing upper surface the sections of the trailing edge highlighted in Photo 17 were removed, a secondary benefit of doing this being the elimination of the kit’s overly thick trailing edges.

Fitting the flaps was not as straightforward as shown in CMK’s instructions, and by the end of the exercise it was concluded that CMK did not intend them to be fitted drooped. The rear edge of the wing upper surface projects beyond the corresponding edge on the underside (Photo 18) with the consequence that the flaps have to sit partially beneath the upper surface. If they did not, their trailing edges would be too far aft (i. e. not in line with the wingtip sections) and there would be a gap on the underside. To overcome this, the underside of the wing upper surface was scraped and sanded down over the area shown in Photo 19 until a sharp edge was formed. This, along with some sanding of the flaps and adjustment of their actuator fairings, allowed them to sit in the correct position and be fixed at a 20° setting. This, the type’s minimum flap setting, was the greatest that could be achieved without undertaking more drastic surgery, which,

BAC Eagle B(PR).Mk1 scale model aircraft,model helicopters radio controlled

most probably, would have resulted in the fairings having an unrealistic appearance. Also, there was interference between flap inner edge and fuselage due to the fuselage possibly being slightly too wide.

CMK’s instructions for fitting their airbrake housings indicate that the rear bulkheads on the kit parts need not be cut away, but this is not so. In Photo 20 the port lower unit has been fitted and most of the joints sanded down. The sides were left until the fuselage had been assembled. Contrary to the instructions, the area between the airbrake pivot arm slots has to be cut away. Having done so a gap exists that was filled by superglueing in place pieces of resin cut from a casting riser.

For the upper airbrakes the instructions show the areas to be cut from the fuselage upper decking (part 23) and main fuselage section as separate tasks, but it is best done with the decking in place. Photo 21 shows the use of plasticard to reduce the excessive width of the pivot arm slots. On a visit to XR220 small plates that fill the upper airbrake hinge slots were noted. With the airbrake open these are slightly raised and their upper edges tucked beneath the airbrake panel (Photo 22). Four small resin pieces are provided for these (although I elected to use 10-thou plasticard), but their purpose had escaped me until the visit. There are no equivalent plates on XR220’s lower airbrakes, the slots seemingly being left open, which is something that is just dis-cemable on inflight images of XR219.

BAC Eagle B(PR).Mk1 scale model aircraft,diecastBAC Eagle B(PR).Mk1 scale model aircraft,build scale models

To fit the Pavla cockpit the existing mounting lugs have to be removed (Photo 23). To mount the pilot’s instrument panel and coaming a compromise was required, which resulted in the panel being fitted with just enough room for the control column, and the coaming being cut back to fit in the space beneath the windshield. A compromise was also required in the rear cockpit because if its instrument panel (Photo 24) was fitted where it should be relative to the cockpit aperture it was too close to the seat. I suspect that the ejection seats are somewhat over size. In each cockpit a shaft behind the seats and a linkage to their right was added, as well as the canopy actuating rams, these being made from telescoping hypodermic tubing (Photo 25).

BAC Eagle B(PR).Mk1 scale model aircraft,remote controlled model airplanes

Fitting the wing

The kit part 42 forms a segment of the upper fuselage and sits in the notch between the leading edges. The instructions show it being fitted before the wing, but it is best left until afterwards. Test fits showed the wing upper surface to stand proud of it and, when compared to the SAM drawings, the absence of the slight under-surface leading edge camber that should have been present. To overcome this, the forward part of the ledges onto which the wing sits was filed down (Photo 26). With the wing dry-fitted to the fuselage, the upper and lower parts were joined, but only along the flap hinge region because, had the leading edge also been joined, the wing would have been too stiff to be bent down at the inboard leading edge. The wing was then fixed to the fuselage, ensuring that it adhered to the revised contour of the mounting ledge. The upper section was then pressed down onto the lower component and the leading edge joined. Gaps and the inevitable ledges along the joint could then be filled as required using superglue.

BAC Eagle B(PR).Mk1 scale model aircraft,rc model planes for sale BAC Eagle B(PR).Mk1 scale model aircraft,build model kits

Elements of part 42 curve down either side of the fuselage and form a joint with the intakes. Their undersides were sanded down to eliminate the worst of the steps present. The aft end of this part sat slightly proud of the wing. To provide scope for adjustment, plasticard shims were glued to its underside and sanded down as needed. The section of upper fuselage was slightly rounded down at the interface with the forward fuselage and was built up with Milliput and the panel lines re-engraved. Milliput was also used to fair in the intakes. Although a seemingly long-winded process, overall I feel an acceptable appearance was ultimately achieved (Photo 8).

Instead of being a continuous flat surface, the joint between wing and aft fuselage was slightly concave. This situation was accepted, because to try and eliminate it would have required the application of a large area of filler with probably detrimental consequences.

BAC Eagle B(PR).Mk1 scale model aircraft,scale model stores

Undercarriage

The kit undercarriage looks unrealistic. My first thoughts were to obtain white-metal replacements, but they were no longer available. It is not necessary to fix the main gear in place early in the build as the instructions show, it being possible to leave it until later by cutting away the forward mounting lug on the inner wall of the wheel well.

Detailed painting and the addition of a missing linkage substantially improve the appearance of the main gear wheel unit. On the real thing there are numerous metal and flexible hydraulic lines on the legs, too many and too fine for all to be reproduced at this scale. However, to add a little realism, units fitted on the legs were represented with small pieces of plasticard; four lengths of fuse wire and four strands of 0.2-mm diameter plastic-coated copper wire were also added and holes were drilled in the anti-torque links. Photos 27-29 show the gear at various stages of the build. A simple jig was improvised to ensure correct fore/aft and vertical wheel unit alignment when they were fitted to the legs (Photo 30). Stretched sprue was used to represent the missing door actuating link.

The extensible nose gear leg that is available in another resin set was not obtained because it seems that it was unlikely to be fitted on production aircraft. Steering rams, hydraulic lines and a shaft at the front of the leg were replicated with hypodermic tubing, plastic-coated wire and stretched sprue, respectively. The wheel hub bosses were drilled through and the tubes into which the towing bar was fixed were represented with lengths of steel tubing (Photo 31).

Painting and decals

A camouflage layout based on a BAC drawing marked ‘preliminary’ has been used in another magazine and by Hannants. It has a high demarcation between upper and lower finishes resulting in white flanks that would have

BAC Eagle B(PR).Mk1 scale model aircraft,build a plane

compromised the camouflage. For this reason I suspect it would not have been adopted for service and instead I used a scheme based on another high-wing bomber design, the Valiant. It was also assumed that the radome, SLAR and antenna dielectric fairings would have been black, and that the intake shock cones and intake leading edges would have been equipped with anti-icing heaters and also finished in black.

Hannants Xtracolor enamels were used, preceded by a coat of Humbrol enamel varnish. Parafilm was used to mask the upper surfaces (Photos 32-34).

BAC Eagle B(PR).Mk1 scale model aircraft,wood model airplanes

Above: Keith’s jig consisted of flat board, two square-section bars, one of which was secured to the board itself, and pencil lines drawn on the board to aid alignment. With the wheel units on the legs, finger pressure was applied to the top of the wheels to bring them to the vertical and the right-hand bar was lightly pressed against the starboard leg. This bar and the fuselage were then aligned fore and aft using the pencil lines and held in place until the five-minute Epoxy being used to join the parts had set. (all Keith Peckover)

The frames moulded on the windscreen are too wide. Had this been spotted before it was fitted they would have been sanded away. It being too late to do so they were ignored and the frames masked off by reference to photographs. The window recesses in the pilot’s and navigator’s canopies are of the wrong size and shape. Both canopies were sanded down to eliminate the recesses and were then masked appropriately. The glazing was not given a gold tint, due to the absence of this feature on the prototype’s forward-facing transparencies and lack of definitive information on its applicability to production machines. To provide a guide when masking the radome (the joint line having been eliminated when correcting the disparity in radome/ fuselage diameters) four strips of masking tape were applied (Photo 35). The rear fuselage was finished using three shades of Alclad and black decal stripe

Resin sets

CMK 7132, Exterior Set for TSR.2 CMK 7133, Control Surfaces for TSR.2 Pavla C72053 (TSR.2 cockpit set) Belcher Bits No. BL3, British Nuclear Weapons (with Red Beard and WE177)

was used on the intake interior to represent the anti-icing heater.

The decals were provided by Xtradecal X72059 Pt 1, Modeldecal, the original kit and my ‘decal bank.’ The national markings were laid over Fantasy Print Shop backing discs, and sections cut from white decal strip were used as backings for the fin markings. In line with the Valiant scheme no markings were applied to the under surfaces, which were weathered with a mixture of artist water-colours, pastel chalks and MIG pigment. A 50:50 gloss/satin mix of Humbrol varnish was applied overall, with Hannants matt varnish being used on the radome, intake leading edges and shock cones.

Conclusions

The use of the resin sets has resulted in the model displaying an unrealistic configuration with auxiliary inlets, flaps and tailplane at take-off settings but canopies and airbrakes open. Whether they enhance it is in the eye of the beholder. The accuracy of the wing leading edge has also been questioned; however, a check against XR220 leads me to think that it is realistic. Shortly before this model was finished CMK released an undercarriage set. Unfortunately this was too late for me, but I recommend its use, especially if the kit is being built with an open weapons bay. Being designed to do the same job, the TSR.2 is often compared to the F-lll. The equivalent exercise with kits could be this one with Hasegawa’s F-lll series. Although the latter predates the Airfix effort by nearly 20 years, the TSR.2 is far short of the same standard. It will be interesting to observe the quality of any future new-mould releases.

Caveats aside, it was excellent to see Airfix release a kit of the TSR.2, to my eyes

BAC Eagle B(PR).Mk1 scale model aircraft,plastic model kits uk BAC Eagle B(PR).Mk1 scale model aircraft,jet model plane BAC Eagle B(PR).Mk1 scale model aircraft,electric rc gliders

To make the masks a photocopy of the painting scheme was made at 1:72 scale. Parafilm was laid over it and cut along the □ark Sea Grey/Dark Green boundaries (Photo 32). The masking sections were then lifted from the paper and laid on the model, which in Photo 33 has been masked from the intakes aft, the tailplanes also being shown. The Parafilm, which clings firmly in place without adhesive, was lifted off immediately after the green areas had been sprayed (Photo 34).

one of the most aesthetically appealing warplanes ever built. A series of well-known events precluded it from ever entering squadron service, replacing the bombers of the V-force and keeping the RAF in the strategic nuclear deterrent business. Come on, surely you didn’t believe that line about the TSR.2 being a Canberra replacement!

Keith Peckover

BAC Eagle B(PR).Mk1 scale model aircraft,flying model planes BAC Eagle B(PR).Mk1 scale model aircraft,plastic aircraft model kits

Connected themes: model plane parts, model helicopter kits, plastic helicopter, BAC Eagle B(PR).Mk1 scale model aircraft, model tanks, electric rc airplane, model airplane rc.

Related posts:

Comments are closed.


The website contains material from different sources. Content on the website is provided for informational purposes. All trademarks mentioned in the website belongs to their owners or companies.