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Post by Deleted on Sept 18, 2014 6:42:15 GMT
Hello John--------- have just been looking at Maxitrak's video of their latest offering ( The 5"g 94xx Pannier Tank ) and thought of you------------------------ see first wagon in the freight train............. www.youtube.com/watch?v=BrqXxhxJG6M ------------ |
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Post by ejparrott on Sept 18, 2014 8:00:03 GMT
Jump ahead to 2:00
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Post by Roger on Sept 18, 2014 8:05:28 GMT
Thanks for that one Alan, that's a nice little locomotive and to my untrained ears it seems to run very sweetly and evenly. It seems to be blowing off all the time so it's obviously got plenty of capacity. If a locomotive does that too readily, what's the usual course of action? Notching back on those long stretches won't make it draw as much fire but then it won't use as much steam. Adding water or coal are going to quieten it down or I suppose you could open the firehole door. Excuse my ignorance on these things, it's not a situation I've had to deal with yet.
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Post by Deleted on Sept 18, 2014 8:23:14 GMT
Don't put as much coal in in the first place!  |
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Post by Deleted on Sept 18, 2014 8:45:09 GMT
Fame at last! Wrong spelling though Nice loco and a nice track. Wonder where it is? John |
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Sept 18, 2014 9:50:34 GMT
as this a commercially built loco, perhaps a few pertinent comments are in order?
doesnt seem much of a test to me - driver and a few wagons. valve setting decidedly off and the exhaust not sharp. exhaust steam very wet (no superheaters?) loco very jerky.
the tyres on the wheels look decidedly thin to me.
no whistle? (or at least not used in the clip)
cheers,
julian
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Post by Roger on Sept 18, 2014 10:37:58 GMT
There you go, it shows how little I know, it sounded ok to me. Lots to learn!
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Post by ejparrott on Sept 18, 2014 10:52:45 GMT
It sounds O K, and to be fair, its hard to make an engine that doesn't run. What Julian says I largely agree, its commercial so it has to be built to a price, detail slips as a result, but there's no excuse these days for valve events to be perfect. Sounds a bit wooly to me. Your 15XX should be better the amount of effort you're putting in.
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Sept 18, 2014 11:21:09 GMT
hi roger,
you need to 'train' (no pun intended) your ear to hear such things as the valve setting or slight or more severe wheel slip. any musician or Church bellringer change ringing on large numbers of rings of bells will know about such things!
some years later i then had to do the reverse and learn how to deliberately create syncopation when learning how to play the ukulele banjo George Formby style!
cheers,
julian
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Post by Roger on Sept 18, 2014 12:30:21 GMT
You're a man of many talents Julian! I'll listen to that sound track again and see if I can make out what you're hearing
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Post by Deleted on Sept 18, 2014 13:36:47 GMT
To my ear it sounded at times like someone has stuck the soundtrack of a real one over the top! Way too deep a chuff for a 5 inch engine and then suddenly it sounded like a miniature one again, odd!
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Post by Deleted on Sept 18, 2014 14:08:10 GMT
Maybe they copied Pansy's valve gear |
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Post by Deleted on Sept 18, 2014 21:30:47 GMT
You're a man of many talents Julian! I'll listen to that sound track again and see if I can make out what you're hearing -------------- ROGER}-as a rough guide, with this type of GWR loco there are 2 cylinders between the frames which are double acting so you'll get 2 x 2 = 4 events per revolution.....When the wheels rotate keep your eye on the front crankpin..... and as it goes past each quater there should be a sharp exhaust blast..... Thus one revolution will sound like}---- 1whoosh---2whoosh----3whoosh----4whoosh..etc, etc, etc....Each being of equal duration and of equal strength..........Not all locos will give this as it's dependant on the number of cylinders and the layout of the crankshaft..eg}---- An A4 has 3 cylinders set at approx 120 degrees and they are double acting....So 3 cyls. x 2 ( double acting = 6 exhaust events in 1 revolution....... The Castle and Kings have 4 cylinders which are double acting = 8 events but the 2 cranks are set at 90 degrees to one another so that 2 cylinders are exhausting together at any one time.....Thus they sound identical to the smaller locos .... |
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Sept 18, 2014 21:43:13 GMT
alan - 'whoosh'?
GWR locos never went 'whoosh'!!
they had a characteristic 'square' exhaust 'chonk'!
cheers.
julian
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Post by Deleted on Sept 18, 2014 21:46:04 GMT
You forgot Lord Nelsons and their 4 cylinders with 135 degree cranks! |
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smallbrother
Elder Statesman
Errors aplenty, progress slow, but progress nonetheless!
Posts: 2,269
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Post by smallbrother on Sept 18, 2014 21:59:12 GMT
alan - 'whoosh'? GWR locos never went 'whoosh'!! they had a characteristic 'square' exhaust 'chonk'! cheers. julian Wish I'd been around to hear one! |
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Sept 18, 2014 22:01:57 GMT
pete,
youve heard one of my GWR loco in miniature and it doesnt go 'whoosh 'whoosh' but has the characteristic GWR 'bark' 'square' exhaust!
cheers,
julian
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Post by Deleted on Sept 18, 2014 22:02:33 GMT
Have a look at this Castle pulling away on an incline with cold stock etc........Go straight to 5.13 to cut out the crap------The piece at the end is the photographers second camera being shaken by the passing train.........http://www.youtube.com/watch?v=3WNsjCYiggk -------------------------------------------- meanwhile there's THIS to enjoy >>>>>>>>>>>>>> www.youtube.com/watch?v=ilC2SPnX7lQ |
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Sept 18, 2014 22:11:12 GMT
i remember standing in 1985 on newport (south wales) station watching (and listening to) GWR George V 6000 leaving the station with the old driver winding back the reverser fast as soon as the train started to move and the explosive exhaust caused the hairs on the back of my neck to stand up! absolutely fantastic!!
for those of you not familiar with newport station it causes quite an echo in such circumstances!
there is nothing quite like a proper GWR exhaust!
alan's youtube clip of 5043 is just the thing to stir all GWR fans!! (jump to 5.40 and 7.34, with both 2 of the 4 cylinders exhausting at exactly the same time in GWR fashion!!)
cheers,
julian
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Sept 18, 2014 22:27:38 GMT
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