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alan2525
Steam Legend!!
Joined: 02 Feb 2008
Posts: 2529
Location: Essex, UK
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 Posted: Sun Oct 12, 2008 9:44 pm Post subject: |
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On my upgraded MSS it was really annoying to begin with, I had to push it most of the way around the garden, after a few laps it had begun to run in a little and after it managed a lap under it's own steam it's just got better and better each time. These things always take a little time to get into their own.
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syrtismajor
Full member
Joined: 23 Apr 2007
Posts: 793
Location: Salisbury
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| Posted: Sun Oct 12, 2008 9:46 pm Post subject: |
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| Titan wrote: | | syrtismajor wrote: | | Shame it didn't play first time. Any clues to why that bogie wasn't behaving? |
Not really, it was running on air, but locked up on steam. It was fitted with the upgrade kit - not new cylinders, but piston and glands replaced for ones with O-rings. The other end is in fact standard Mamod stuff. A little - or maybe a lot of tinkering will have it going, but with a project of this magnitude I would have been quite suprised if it ran OK at the first attempt!
Quite a lot to do but I am looking forward to it! |
That might be one of the problems since steam will look for the easiest escape route. If one set of cylinders have o-rings and one don't, the steam will favour the side without as they will most likely move easier.
Maybe you could try having one upgraded and one normal cylinder on each bogie so one each side of the loco will have one upgraded and one normal cylinder? This migh equal things out a bit?
Hope you get it all sorted!
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Titan
Steam fanatic
Joined: 19 Jul 2006
Posts: 1167
Location: Derby
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| Posted: Sun Oct 12, 2008 9:47 pm Post subject: |
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It also did not seem that full boiler pressure was getting to the cylinders - it was maintaining about 30 psi, - safety valve set for about 40 psi - which if all of it was getting to the wheels would have meant that the Unmodified Mamod end should have been spinning! Could be there is some restriction as there is a lot of pipework, and the leaks don't help much either, but as I sort the problems out one by one it should be a cracker!
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Titan
Steam fanatic
Joined: 19 Jul 2006
Posts: 1167
Location: Derby
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| Posted: Sun Oct 12, 2008 9:51 pm Post subject: |
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| syrtismajor wrote: | | Titan wrote: | | syrtismajor wrote: | | Shame it didn't play first time. Any clues to why that bogie wasn't behaving? |
Not really, it was running on air, but locked up on steam. It was fitted with the upgrade kit - not new cylinders, but piston and glands replaced for ones with O-rings. The other end is in fact standard Mamod stuff. A little - or maybe a lot of tinkering will have it going, but with a project of this magnitude I would have been quite suprised if it ran OK at the first attempt!
Quite a lot to do but I am looking forward to it! |
That might be one of the problems since steam will look for the easiest escape route. If one set of cylinders have o-rings and one don't, the steam will favour the side without as they will most likely move easier.
Maybe you could try having one upgraded and one normal cylinder on each bogie so one each side of the loco will have one upgraded and one normal cylinder? This migh equal things out a bit?
Hope you get it all sorted! |
In time it will have upgraded cylinders on both ends. I just left the SLK's cylinders as they were as they were known to be good - wheras the others got done as they were known to be bad!
I suppose that I could also run one end on blocks at a time to run it in if needs be - The full power of that boiler on on bogie only might make it spin a bit quick!
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andysleigh
Steam fanatic
Joined: 07 Apr 2007
Posts: 1018
Location: guildford
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| Posted: Mon Oct 13, 2008 12:56 am Post subject: |
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Thats come along rather quickly.
well done!
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