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Post by Deleted on Dec 21, 2006 13:37:28 GMT
The Gauge 1 section was looking a bit quiet so here is something many railfans may never have seen before; the Swedish F Class Pacific. They were 4 cylinder compounds and one is preserved though not sure if it is operational. My model, built about 15 years ago, is a 2 cylinder simple version with piston valve cylinders. On the prototype I seem to remember that the piston valves controlled both high and low pressure cylinders. As a result the centre line of the valves is nearly over the frame plates and the valves are operated by rocker shafts.
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Post by greasemonkey on Dec 21, 2006 18:27:16 GMT
ummm, lovely. Fantastic detail for Guage 1.
Andy
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Post by baggo on Dec 21, 2006 18:38:01 GMT
Very nice! Any chance of a few more pics?
John
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Post by Deleted on Dec 21, 2006 20:03:57 GMT
Thanks guys, here's another photo. The pressure gauge in the cab is 3/4" diameter, boiler is coal fired and has a radiant superheater. The tender was a real pain to make as the top 10mm or so is parallel and all the rivets were embossed before shaping. The odd blue thing near the front of the tender is a covered re-railing jack, not unsurprisingly bearing in mind the Scandinavian winters the cab roof is covered in insulation. Colour of the loco was a real problem as no one seemed to quite know what they looked like. The story is that the cladding and cab were blued steel though the preserved loco has been painted a sort of flat light blue.. Just looking for another photo of the chassis under construction, back soon!
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Post by Deleted on Dec 21, 2006 20:55:36 GMT
Chassis under construction, as you can see my photographic skills are not in the same league as the engineering department; it took quite a bit of fiddling to get it this good! Part made whistle behind the air compressor, axle pump behind the cylinders which like the wheels are investment cast, displacement lubricator ahead of the cylinders. The motion plate/weightshaft support/splasher doodad is a silver soldered mild steel fabrication. Note the curved weightshaft to clear the boiler, great fun to make. Actually it is dead easy to do with a lathe and oxy/propane torch.
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Post by havoc on Dec 21, 2006 21:12:27 GMT
Aha, some other G1 builders coming out of the woodwork.
This is a beauty. That motion work is fantastic, and then those tiny oilers on the running board... Really inspiring engine.
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Post by Shawki Shlemon on Jan 6, 2007 5:50:46 GMT
To me this is watch making . I am impressed , congratulation.
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Post by Deleted on Jan 9, 2007 21:06:40 GMT
Hi Guys, Cheers for your kind comments, not quite watch making though: how the hell do they do that? I've been rummaging through my negative collection and come up with a couple more pics taken during construction; the boiler and superheater header and a close up of the valve gear during a trial assembly. To give an idea of scale, the screws and nuts holding the crosshead slipper in place are 16BA (0.0312" clearance drill). I'm soo glad I'm working in 3/4" scale now! Much easier on the eyes! Looking through my notes I see that the full size locos were the first to be fitted with roller bearing main axle boxes and I used 2 ball bearings in each axlebox on the model. The difference in rolling resistance is utterly stunning and well worth the effort, just don't leave it unattended on the bench!
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