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Apr 17, 2008 8:42:42 GMT
Post by Shawki Shlemon on Apr 17, 2008 8:42:42 GMT
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Apr 17, 2008 9:35:31 GMT
Post by teakfreak on Apr 17, 2008 9:35:31 GMT
It happened to me on Tuesday! Didn't realise the regulator was open on my 3-1/2" gauge A4 (it was in forward gear, because it is a B*****r to adjust, but with drain cocks open) and suddenly shot off! Luckily someone managed to catch it more or less as in the picture and no harm was done. I have learned my lesson though.
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Apr 17, 2008 9:41:00 GMT
Post by Shawki Shlemon on Apr 17, 2008 9:41:00 GMT
The one in the picture was in US and appears that water flash in the S/H produced enough steam to drive itself as the gear was in FWD and brakes off .
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Apr 17, 2008 10:41:19 GMT
Post by AndrewP on Apr 17, 2008 10:41:19 GMT
From the Chaski forum where this was extensively written up:-
I was there.
Peter believes that the tender brake linkage was adjusted recently a bit too tight, and in the turn just before the turntable, the rotation of the trucks caused a slight bind by tugging on the brake rigging. This caused him to add power as he crept through the turn. The added pressure in the superheater tubes from pulling through the binding turn, suddenly accelerated the engine because the tender trucks straightened out and 'released' the brake. The throttle was quickly closed and the brakes were applied and the LAST axel remained on the bay. The remaining axel was secured with a come-a-long, the engine lifted, and the turntable swung under for rerailing.
The luck came from the pilot beam missing a concrete ring by about six inches, punching through thin asphalt and being stopped in a cushion of sand. Result, almost no damage, the brakes were later loosened slightly relieving the bind, and the engine ran the next day.
Peter now recommends lining up the turntable BEFORE approaching the pit and pushing the engine the last 20 feet!
PS-Water into the superheaters was considered as a cause. (Remember the superheaters are AFTER the throttle IN THIS MODEL, so flashing steam goes straight to the cylinders) Had that been the case it is unlikely the engine could have been stopped before going completely into the pit because of the extent of the surge created when that happens.
Closing the throttle and having the engine accelerate is a very strange feeling!
Leonard Evans/Highiron999
The Peter referred to is the owner and was driving.
Thankfully no major damage and running again the next day.
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Apr 17, 2008 11:13:36 GMT
Post by Tel on Apr 17, 2008 11:13:36 GMT
In two words or less - Nars Tea
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Apr 17, 2008 12:08:47 GMT
Post by Nigel Bennett on Apr 17, 2008 12:08:47 GMT
It really makes you feel sick when it happens; my pal Edwin lost his LNER K3 over the side of the traverser about six years ago. It's only just steamed again (last weekend) for the first time since. Damage was mainly cosmetic - but seeing your pride and joy upside down on a concrete floor doesn't do you any good. It took Edwin a long time to summon up the resolve to repair it - I think it was more that than the actual work involved.
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tbsteam
E-xcellent poster
Posts: 231
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Oops
Apr 17, 2008 15:26:15 GMT
Post by tbsteam on Apr 17, 2008 15:26:15 GMT
it happened to me with my battery electric loco but luckily there was only a slight bend on the edge of the cab roof.
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Apr 17, 2008 16:39:29 GMT
Post by lordsimon on Apr 17, 2008 16:39:29 GMT
Many years ago i was running my mates hunslet. All day it was fine and had no problems but first thing the regulator felt very tight. When we were planning to come off the regulator jamed on my mate as he was going down hill to a bend and you can all guess what happend next, luckly it land on grass on it side near a few people who quickly lifted on its wheel my mate hurt his groin area ouch.
there was only a small bit of damge to the saddel tank and grass every where but we still to this day never found what caused the regulator to jam as it freed its self on impact
simon
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