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Great Central Models Robinson GCR Class 8B Atlantic LNER C4, Инструкция по сборке

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Page 21 GCR Class 8B

Page 21 GCR Class 8B

Valve Rods

Start with the valve gear for the right hand side.

Remove

Valve Rod Right Outer (187)

 and

Valve Rod Right Inner

(188)

 from the fret. With a small piece of wet and dry paper ease

out the large holes to 5.7 mm so that they revolve easily round
the brass eccentric plates (Drwg. 215).

Remove

Outer Rod End Strips (189,190)

 and

Outer Rod Spacer

(193)

 from the fret and using a 0.3 mm piece of brass wire locate

these parts as shown and solder up.

Remove

Inner Rod End Strips (195,196)

 and

Inner Rod Spacer

(199)

 from the fret and using a 0.3 mm piece of brass wire locate

these parts as shown and solder up.

Eccentric

Note

Since these parts are the ones that tend to get either lost in the
carpet or are difficult to solder together a rear tag with an extra
locating hole is provided for them.

For the eccentric itself (201,204) drill out the holes at each end to
0.6 mm. These will fit on to the Lifting Arms.

Remove the eccentric parts 201-212 from the fret, complete with
their extensions and use 0.3 mm wire to locate them and solder
together as shown in the diagram.

Clean up as much as possible and cut and file the rear of the
eccentric assembly to shape.

Lifting Arms

For Lifting Arms (213-216), Rotation Arms (217-220), Rotation
Arm End Spacers (221,224) drill out the smaller holes to 0.5 mm
and the larger holes in the bottom end of Lifting Arms (213-216)
to 0.7 mm. This is the end that is locked through the centre of
the eccentric.

Steam Chest Rods

Remove

Valve Rod Ends (226,227)

 from the fret and roll round a

piece of 1.6 mm brass rod on which the ends have been filed flat
over a length of 2 mm, drill through the locating holes and fix in
place by soldering. The flat should be such that the width of the
finished sub-assembly is no greater than 1.6 mm.

At this stage with a little judicious fettling it should be possible
(but only just) to slide this up and down the eccentric. It may be
easier to leave this in the fully up or fully down position since
they may never move when the engine is running.

Fit short lengths of 2.4 mm brass tubing (ideally this should be 4
mm long) into Valve Guide Support Spacer (19 or 19EM) and
using some 1.6 mm brass rod, align it through the Cylinder
Spacers (7,8) ensuring that the rod slides very easily.

Brass Plates

In Drwg. 215 Eccentric there are four plates which fit either side
of Valve Rod Outers (185,187) and Valve Rod Inners (186,188).
There is Eccentric Template (230) on the fret which can be used

17.Valve Gear Eccentric

18. Final Eccentric Shape

19. Lifting Gear

Main Eccentric (203,204)

Eccentric Bracket 205,206)

Eccentric Short Brackets (209,210)

Lifting Arms (213-214)

Rotation Arms (217-218)

Rotation Arm End Spacers (221,222)

20. Valve Rod

Valve Rod End

(226)

1.6 mm Brass Rod

21. Overview of eccentric and lifting gear

Содержание Robinson GCR Class 8B Atlantic LNER C4

Страница 1: ...Railway locomotives Great Central Models Ltd is registered as a Private Limited Company 7355519 Further details www greatcentralmodels co uk Enquiries to sales greatcentralmodels co uk or via the con...

Страница 2: ...he whistle from the cab top onto the boiler happened for the same reasons of loading gauge As always a good picture is the best guide provided the dating is accurate For guidance according to RCTS dat...

Страница 3: ...hen they all became black again Under LNER management the beading was always unpainted and usually unpolished Tenders when built for 192 194 were the GCR 3 250 gallon version but these were soon repla...

Страница 4: ...g things While there are traditional etched springs on Sheet 3 for this kit the centre springs have been printed using 3D CAD technology They are fitted to the horn blocks Note that these are heat sen...

Страница 5: ...ce when the fret is etched TABS are on the parts to fit into SLOTS in the corresponding parts In many areas on the fret TAGS have been arranged so that they fit onto TABS solely to help minimize any p...

Страница 6: ...hen heated to solder them together Take care to hold parts carefully with insulating material where needed and to let them cool properly before handling This is especially true if annealing parts so t...

Страница 7: ...y for P4 modellers and less so for EM modellers This rear boss should be removed from Alan Gibson wheels Potential purchasers in the fine scale gauges are urged to consider these points There are as a...

Страница 8: ...linder Head Sheet 3 53 Safety Loop Sheet 1 54 Safety Loop Sheet 1 Brakes 55 Brake Frame Mount Sheet 1 56 Brake Frame Mount Sheet 1 57 Brake Frame Mount Sheet 1 58 Brake Frame Mount Sheet 1 59 Brake Fr...

Страница 9: ...eet 1 165 Hex Bolt Head Sheet 1 166 Hex Bolt Head Sheet 1 167 Bogie Spring Hanger Sheet 1 168 Bogie Spring Hanger Sheet 1 169 Bogie Spring Hanger Sheet 1 170 Bogie Spring Hanger Sheet 1 Cross Heads 17...

Страница 10: ...2 supplied cast items 18 Drwg 258 Smoke Box Door 1 supplied 19 Drwg 260 Martkits M4HRKWDs 12 Supplied 20 Drwg 261 MarkitsRAXFBsq601 axle boxes 4 supplied 21 Drwg 262 GC Smoke Box Handle Markits M4SBD...

Страница 11: ...b Sheet 4 46 Inspection Cover Sheet 5 47 Inspection Cover Sheet 5 48 Inspection Cover Sheet 5 49 Inspection Cover Sheet 5 50 Inspection Cover Sheet 5 51 Fire Box Brace Sheet 5 52 Fire Box Brace Sheet...

Страница 12: ...cing Aids EM Sheet 5 136 Footplate Assembly Aid Sheet 4 137 Cab Assembly Aid Sheet 5 138 Cab Assembly Aid Sheet 5 139 Fire Box Support Aid Sheet 5 140 Fire Box Support Aid Sheet 5 141 Belpaire Filing...

Страница 13: ...et 2 to practice Drill out the frame stiffener locating holes to 0 3 mm in Frame Left 1 and Frame Right 2 see picture right Measure the short handrail tails which will be used for the springs they wil...

Страница 14: ...oles to 0 3 mm Remove these parts from the fret and with the aid of some 0 3 mm brass wire locate and solder into place on the inside of both frames Locate parts Valve Guide Support Spacer Stiffener L...

Страница 15: ...Frame Spacer Brace 13 or 13EM Solder these in place checking the width of the frames carefully after each one 16 20 mm for P4 and 14 80 for EM Once these are fitted and you are certain the frame is w...

Страница 16: ...ing and fitting as normal Drill the two small holes in Cylinder Heads 49 52 to 0 45 mm Drill the large centre hole to 2 4 mm or for the Markits crosshead 2 1 mm Remove Cylinder Heads 49 52 from the fr...

Страница 17: ...uld be used unless you are confident of great accuracy in which case the half etch layer may be left out Remove the two sets of Cross Head parts 171 184 from the fret and align each set locating them...

Страница 18: ...er crank pin holes to suit your crank pin bearings The front crank pin is rather shorter than on the other axles if the crank pin nut is reversed Drill out the coupling rods to suit your choice of cra...

Страница 19: ...the draw plate slot Fit Drwg 216 Rear Buffers in place and solder Secondary Frame Push out the rivets if required in Rear Frames 236 237 and remove them from the fret Bend so that the half etch is on...

Страница 20: ...re needed and solder into place Remove Couplers 34 35 from the fret and solder into the front buffer beam Brake Cylinder Support Remove parts Brake Cylinder Supports 28 29 from the fret drill the smal...

Страница 21: ...out the smaller holes to 0 5 mm and the larger holes in the bottom end of Lifting Arms 213 216 to 0 7 mm This is the end that is locked through the centre of the eccentric Steam Chest Rods Remove Valv...

Страница 22: ...chanism Reversing Axle and Balance Weight The Counterweight Weight Drwg 211 will need a 1 2 mm hole drilled in the side halfway along into which can be soldered Balance Arm 225 Note For completeness o...

Страница 23: ...om the fret bend to shape so that Rear Brake Pulls 95 96 will fit between them Remove Rear Brake Pulls 95 96 from the fret and solder together Pin to Brake Cylinder Links 93 94 using a short piece of...

Страница 24: ...on the insides of the frames ensuring the front face is vertical and the inset on the front edge fits just under the bottom of the front buffer beam Front Bogie Note The Adams Bogie rotates around a c...

Страница 25: ...lf etched leaf spring showing Remove Bogie Spring Hangers 167 170 from the fret if required and use a piece of 0 45 mm wire to locate Drill out the bottom holes in Bogie Frame 141 the holes in Bogie S...

Страница 26: ...fully so that they fit as close to the frames as in the prototype Driving Axles side play Front wheel as little as possible since there is only a very small space between the coupling rod and the back...

Страница 27: ...ich lasted until nearly grouping or 1 mm proud for the later blanked off version Note that this NiSi rod should fit inside the 2 4 mm tube if fitted in the cylinder block Centre Axle Spring Drwg 209 i...

Страница 28: ...ark 0 45 mm on Cab Sides 55 57 if you intend to fit a pair of the GCR brass numbers Drill the cab side rail holes to 0 45 mm note that the hand rail was set forwards when side screens were fitted so c...

Страница 29: ...tre slots only The rear tab should overhang the balsa Use Cab Assembly Aids 137 138 as shown to assist in getting these vertical Firebox Note The front of the fire box will need filing to shape there...

Страница 30: ...ection Covers 46 50 from the fret curve to shape and solder in place These are fitted along the centre of the curved part of the boiler and at 3 mm 13 mm and 23 mm from the front of the cab on the lef...

Страница 31: ...n these curved parts will locate on the tabs of the part of the fire box inside the cab Cab Cupboards Solder a couple of Door Hinges 77 80 on each of the Cab Cupboards 75 76 over the holes and add a 0...

Страница 32: ...t and rear sections Curve the T shaped brass and solder to the centre of the roof or centre it at 11 5 mm from the front to be accurate Check the roof fitting but do not solder in place until the cab...

Страница 33: ...steps Remove Rear Step Plate Left 96 Rear Step Left Upper 97 and Rear Step Left Lower 98 from the fret Bend Rear Step Plate Left 96 to shape as shown there is a distinct kink a few inches below the va...

Страница 34: ...ss 8B Page 34 GCR Class 8B curve the valences to suit then solder into place against the foot plate support brackets 34 37 with the steps in position temporarily 56 You are here 1 58 You are here 3 57...

Страница 35: ...early They should be an accurate fit if the footplate is straight Remove Boiler 1 from the fret and roll to shape with the locating marks on the outside The longitudinal ends should meet exactly Remo...

Страница 36: ...ere always fitted on the right hand side Smoke Box Step Drill the hole in Smoke Box Step 8 and the hole in the front of the Smoke Box Frame 4 which is on the lower right side to 0 3 mm Remove Smoke Bo...

Страница 37: ...15 17 Remove Lamp Brackets 15 17 from the fret bend to shape and fit to foot plate using 0 33 mm brass wire to locate them Trim any excess wire and file down Vacuum Pipe Locate the Markits Vacuum Pipe...

Страница 38: ...te The tradition way for modellers to fit this is to attach a couple of small hooks to Foot Plate Connection 124 and a couple of loops to either the tender or locomotive according to preference Fittin...

Страница 39: ...from the fret solder one hinge to door side and use the extension as a support for the hinge mechanism consisting of some very short lengths of 0 8 mm tube and 0 45 brass wire its easier than it soun...

Страница 40: ...Page 40 GCR Class 8B Page 40 GCR Class 8B...

Страница 41: ...Page 41 GCR Class 8B Page 41 GCR Class 8B...

Страница 42: ...ttle more space for vertical movement This is soldered onto the inside of the main frame there are half etch vertical marks to assist in location 110 111 Rear Wheel Spring Mounts should be free to mov...

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