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Post by spamcanman on Sept 16, 2010 21:05:10 GMT
well it looks like after 5 years since he started a Modelworks Britannia kit our club member has finished it so we should see it at our track next season britanniabuilder.com/  |
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Post by Jim on Sept 16, 2010 21:56:49 GMT
It looks fantastic too and a tribute to John and his dedication in keeping his website up to date on the build.
Jim
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Andrew C
Part of the e-furniture
Posts: 447
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Post by Andrew C on Oct 31, 2010 10:39:37 GMT
John your comment about a whistling noise from the front end on your web site. Check the tightness of the inlet pipesin the smoke box. I had exactly the same problem last week during an initial steam test of my Brit. On investigation there was a distinct cleane ring round the joint between one of the superheaters and the pipe that goes through of the smokebox. Andrew C.
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Andrew C
Part of the e-furniture
Posts: 447
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Post by Andrew C on Nov 4, 2010 14:30:38 GMT
It's nice to find out the it is possible to get one of these engine to work.
It's also nice to find a web site that's actually useful!
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Post by Deleted on Nov 4, 2010 17:28:11 GMT
It's also nice to find a web site that's actually useful! I agree that John's web site is a first class reference, and I've met him at home and seen the model in the flesh: he is a real gentleman. However, did you mean to imply that this website isn't useful? DJ! This man needs a talking to! JB |
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Jason
E-xcellent poster
Posts: 204
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Post by Jason on Nov 4, 2010 18:06:24 GMT
It was John’s website that inspired me to have a go at a Modelworks kit :-), the only problem it was the ill fated Duchess :-( !!!! I should have followed John’s example with the Britannia. But now seeing John’s superb finished engine does make me consider one of the un-fished Britannia’s or 9F’s that come up for sale could be a worthwhile purchase!!!  |
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Andrew C
Part of the e-furniture
Posts: 447
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Post by Andrew C on Nov 6, 2010 7:48:27 GMT
Ok point taken. It was actually a twerpagraphical error ( me being the twerp) it should have read web sites. Jason Station road steam have a 9F in bits for sale. Thats where my Brit came from. It is another usefully site. www.stationroadsteam.com/ok ok that three! but you know what i mean  |
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Andrew C
Part of the e-furniture
Posts: 447
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Post by Andrew C on Nov 12, 2010 17:12:56 GMT
I notice from jj's web site he has changed the rings on the piston valves to ptfe ones. Sound like he has ended up with a different engine, no whistle and no leaking. That's really good news. Bad News for me though. Means new ptfe rings on mine too  . But looking on the bright side, the hard work of tracing the whistle has been done . Thanks John |
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Post by Deleted on Jan 21, 2011 11:13:57 GMT
My Modelworks Britannia is on display on the North London SME stand at the Alexandra Palace exhibition from today until Sunday.  |
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Post by Deleted on Jan 21, 2011 14:29:39 GMT
John,
I hope that you have a secret recorder running to capture the puritanical (read nonsensical) comments that will surely come forth!
JB
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Post by Deleted on Jan 21, 2011 19:25:23 GMT
That's a beautiful looking loco that you have there jj .... Pete |
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pault
Elder Statesman
Posts: 1,502
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Post by pault on Feb 28, 2011 14:20:02 GMT
Hi John
I enjoyed your website on the building of your Britannia, very informative it just a shame you have had the problems that you have had through no fault of your own. Well done for getting through them. One point stuck me about your post on 14/11/10, you said that you pushed the loco along in mid gear with the regulator open and had steam coming from the drains and chimney. This may not indicate a problem with the valve rings. When the loco is in mid gear the valve is still being moved by the combination lever. Part of this movement can be to provide lead steam, which is admitted to the cylinder before the piston reaches the end of its stroke. Whether lead steam is provided is down to the design of the valve gear and valves etc, however it normally is provided. If the steam from the relative drain cock is only blowing(rather than being pushed out by the piston) when the piston is just around front or back dead centre and the steam from the chimney is just wafting out or very weak puffs it may well just be the lead steam causing it. Try moving the loco small amounts at a time as the piston will push the steam out of the drains giving the impression of a continuous blow, and observe the drains. From what you have said I would run it, enjoy the fruits of your labours and let everything bed in and settle down before you make anymore changes.
Paul
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Post by Deleted on Feb 28, 2011 16:07:00 GMT
Hi Paul
Thanks, I'm glad you enjoyed my website.
I'd rather assumed that when the valves are in mid-gear they shouldn't admit steam to the cylinders at any point in the revolution - I thought that the inside edges of the valve heads should just move up to the inside edges of the port, but not open over them. My valves move about 8mm in mid-gear, which I think agrees to that interpretation.
I think that the steam that I'm seeing when pushing the engine along in mid-gear is caused by the fact that the PTFE rings don't cover the whole length of the valve heads, so there is a couple of mm of valve bobbin between the inside edge of the head and the ring which is a close fit but not steam-tight, so that some steam escapes to the ports even in mid-gear as the PTFE ring opens over the ports. However, it's no big problem and as you say I shall run it and enjoy it before I change anything else!
Kind regards
John
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Post by Jim on Mar 10, 2011 12:30:15 GMT
As you know John I've been following your web site for some time and use it as a constant reference as I slowly head towards completing Boadicea.
Now to see your finished model on display is frankly just fantastic.
Congratulations John.
Best wishes
Jim
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Post by Deleted on Oct 6, 2011 19:58:39 GMT
Here's a short video of my Britannia last Sunday at full throttle on the steepest part of our North London track, the first time that I'd tried pulling two coachloads. It seemed to thrive on the extra load. www.youtube.com/watch?v=gOUUkwWHQt8 |
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Post by Jim on Oct 6, 2011 21:09:15 GMT
Magnificent John, just like the real thing racing up grade toward Ipswich.
You should be one very happy man. Well done!
Jim
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Post by jgb7573 on Oct 6, 2011 21:45:09 GMT
Cracking! And I bet it'll take more trolley's yet.
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Post by spamcanman on Oct 7, 2011 7:01:17 GMT
I saw John's Britannia on Sunday and it absolutely stunning especially with the extra detail he's done. I think it proves that Modelworks did make engines that work, yes I know he's had to do some fettling and other jobs on it to get it to this standard but he's got there finally and we at the club are proud of him.
Well done John Imlec next!
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Post by Deleted on Oct 7, 2011 8:16:26 GMT
I second Tony's comments, you have a great looking loco there John and I was lucky enough to get a ride around the club track with you. Top stuff... Pete |
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Post by standardsteam on Oct 7, 2011 9:32:43 GMT
I did think Modelworks were occasionally unfairly maligned sometimes because, admittedly with some care, if you put locomotives together thoughtfully enough, they did and could work well. That's not to say it was straightforward or easy and there was a certain expectation presented they would work "out of the box". I don't think it's worth going over that again, but with another Modelworks Brit winning IMLEC, with some tweaking they can certainly be made to go well, and John's meticulous approach to documenting his build has helped a great number of Britannia builders and others. I saw John's Britannia on Sunday and it absolutely stunning especially with the extra detail he's done. I think it proves that Modelworks did make engines that work, yes I know he's had to do some fettling and other jobs on it to get it to this standard but he's got there finally and we at the club are proud of him. Well done John Imlec next! |
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. But looking on the bright side, the hard work of tracing the whistle has been done 