31st May 2023 The next item to be machined is the crack axle separate part and then assemble. Whilst most loco have Right Hand crank leading my research shows that the GWR used in general left hand lead, which is shown on the plans and that is what I will use.. |
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1st June
2023 The photo shows the cranks with their end pieces set in-place. They are now left to set overnight at least. I have found that I have not yet drilled nor tapped the eccentrics for their setting Allen Bolts !!! |
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3rd June
2023 The other parts of the crank angle were machine and after one failure the parts mated up well. In the picture you can see the crank axle the centre and right hand piece are not yet fixed but the left hand has its adhesive applied and is now setting. the the alignment as good as to be expected!!! |
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5th June
2023 The first thing I did to day was to drop the centre part of the crank axle on the floor. After 2 hours and not found I decided to make another. When mde one end was Loctited onto the crank leaving one end open to fit the eccentric centres on in due course. The remaining two centres of the eccentrics were drilled and reamed so all that now need to be done is to drill and thread for a locking Allen screw. |
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7th
June 2023 Eccentrics drilled and tapped for M4 allen screws |
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23rd
June 2023 Sorry for the delay in posting items of engineering but I have been diagnosed with needing a hip replaced so that took priority for appointments etc. Still back at the mill / drill now The photo shows the setting up with the second stage of the edge finder which then when press the 1/2 button showed me how far to move the Y axes to reach the centre. |
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The centre
drill was used first particularly as the drilling was on the
slant. |
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This was
followed by a small drill through the sheave. |
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The drill
holes was cleaned up as there was a burr on the inside of each
sheave and then the set was reassembled. |
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Considering
what other part of have laser cut and have ordered these:- |
5497
connecting rods 7442 Gear grab Saxby 7443 Back gear Saxby 20259 Side Stirrup 20260 Long lift link Saxby 20439 Ash Pan bracket 20441 Boiler top drill template 20453 Splasher inner and outer plates 2054 Splasher top plate 20455 Splasher decorative trim 20754 Outside cranks 20898 Slide bar spacer 20994 Connecting rod 211274 Spring hanger |
1st July
2023 Today I hope to achieve the Axle horns ready t6o fit to frames. The drawing opposite is for the 3 1/2" model. Conversion took some time but the length of the 1" piece on the drawing for 5" model is 1 1/2" still with thickness of 3/16" but depth of 3/8". |
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The axle
horn was measured and the additional piece was first cleaned off
and then coated on the side to be soldered clamped in place. A
strip of silver solder was laid along the joint and then heated
until it fully melted and then was left to cool. That leaves 4 more to do for the leading axle box then more metal bought for the centre axle horns and then they will need soldering and lastly the training axle horns but the length of the pieces needs to be calculated. |
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Both of the
leading axle horn completed except for fettling to make the axle
boxes slide easily in the space. The top on is cooling the lower one is cool!! |
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7th July
2023 Supply of steel arrived so I was able to cut four more pieces and silver solder to the mid axle horns. Also collected from MMES were the issues of Model engineer showing the variations of the parts for the posts value movement. This is the information :- LBSC's drawings produce a locomotive with the outwards appearance of Lion, not a scale model. There is a letter authored by Charles E Taylor-Nobbs on the subject with suggested corrections to produce a more accurate representation in Model Engineer magazine Volume 150, issue 3705, 20 May 1983, page 620. The gab valve-gear as drawn by LBSC cannot be reversed except at certain crank-axle positions. Modifications with dimensioned drawings applicable to 5" gauge Lion locomotives were authored by L A Saxby in Model Engineer Magazine, volume 139, issue 3479, 21 December 1973, page 1222. He also advocates modifications to lock the screwed valve-rod glands and addition of a bridge piece to the end of the rocker-arms to cope with excessive strain. Further comments on the gab valve-gear including an improved valve-rod gland and other suggested improvements are covered in an article in Model Engineer magazine by K C Miller in Volume 150, issue 3707, 17th June 1983, page 714. |
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9th July
2023 The plans showed the 5" gauge trailing axle and the 1 3/8" parts needed. |
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Parts cut
and ready to silver solder. |
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13th July
2023 Leading horn soldered |
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Now both
Silver Soldered |
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15th July
2023 Surplus Silver solder filed away so that the part sits well on the frame steel. |