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Author Topic: Preserved Mallard “on off” switch.  (Read 508 times)

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Offline oldbill

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Preserved Mallard “on off” switch.
« on: September 10, 2019, 03:51:07 PM »
 Hi, can anyone tell me what the small on/off switch on the front left hand side of the engine does.
Pete

Offline njee20

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Re: Preserved Mallard “on off” switch.
« Reply #1 on: September 10, 2019, 05:11:15 PM »
Give us a clue, got a picture?

On the model (if so, which?) or the real thing?

Edit: I see now this is in “real railway discussion”, apologies!
« Last Edit: September 10, 2019, 06:13:55 PM by njee20 »

Offline ntpntpntp

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Re: Preserved Mallard “on off” switch.
« Reply #2 on: September 10, 2019, 05:47:58 PM »
Maybe referring to this little opening with "open/shut" perhaps?


Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline chrism

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Re: Preserved Mallard “on off” switch.
« Reply #3 on: September 10, 2019, 05:58:18 PM »
Hmm, the lock for a removable access panel, maybe?

Offline mojo

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Re: Preserved Mallard “on off” switch.
« Reply #4 on: September 10, 2019, 06:07:33 PM »
Opens the front smokebox door by crank handle?
Maurice C.

Offline njee20

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Re: Preserved Mallard “on off” switch.
« Reply #5 on: September 10, 2019, 06:13:21 PM »
That certainly seems plausible. Looks like something needs putting in and rotating!

Offline dannyboy

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Re: Preserved Mallard “on off” switch.
« Reply #6 on: September 10, 2019, 06:17:50 PM »
It's where you put the key to wind it up.  :-X
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Offline exmouthcraig

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Re: Preserved Mallard “on off” switch.
« Reply #7 on: September 10, 2019, 06:26:58 PM »
No idea but god does she look good in that blue, in that light, in that picture  :claphappy:

Offline RailGooner

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Re: Preserved Mallard “on off” switch.
« Reply #8 on: September 10, 2019, 06:29:45 PM »
A beautifully framed photo too. :thumbsup:
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Offline ntpntpntp

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Re: Preserved Mallard “on off” switch.
« Reply #9 on: September 10, 2019, 06:53:08 PM »
I found the photo via google, National Railway Museum's twitter account by the look of it.

https://twitter.com/railwaymuseum/status/1156161982732689408
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline PLD

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Re: Preserved Mallard “on off” switch.
« Reply #10 on: September 10, 2019, 08:14:35 PM »
They're not an original feature as far as I can tell but there is one on each side...
From the position almost certainly related to the cylinders or valves, possibly drain valves or lubricators??

Offline Steven B

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Re: Preserved Mallard “on off” switch.
« Reply #11 on: September 11, 2019, 09:14:53 AM »
A photo here https://www.railwaymuseum.org.uk/what-was-on/mallard-75 show Mallard and Dominion of Canada in preserved condition and both have the hole.

Further down the page is a picture of Sir Nigel Gresley with Sir Nigel Gresley which also shows the access hole. Gresley died in 1941 so it's not a post-preservation modification.

Picture of 4486 Merlin here shows the hole.

Similarly for 2512 Silver Fox and 4901 Capercaillie

There's clearly some valve hidden behind the vallance that's accessed via the hole.

Steven B.


Offline NGS-PO

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Re: Preserved Mallard “on off” switch.
« Reply #12 on: September 11, 2019, 09:26:35 AM »
It is for opening and closing the streamlined "Cod's Mouth", I believe

The chap disappears behind the locomotive in this video to operate the mechanism:



« Last Edit: September 11, 2019, 09:28:37 AM by NGS-PO »
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Offline ntpntpntp

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Re: Preserved Mallard “on off” switch.
« Reply #13 on: September 11, 2019, 11:23:08 AM »
We still haven't heard back from @oldbill  as to whether or not this is what he was actually asking about, though?
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline Bealman

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Re: Preserved Mallard “on off” switch.
« Reply #14 on: September 11, 2019, 11:27:49 AM »
No, but all of the above posts and particularly the video, seem to point to the opening of the front (Cod's Mouth).

Interesting, nevertheless!  :beers:
Vision over visibility. Bono, U2.

 

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