A4 Tenders TO67

[dlester]

I've been looking to get details on the eleven streamline corridor tender attached to the A4s (initially 2509-12 + 4491-97). Looking through the details available on

http://www.nationalarchives.gov.uk/a2a

The key document (GA?) is GB 756 2000-7200/R257. One clue that this might be the right tender is that there's a TO67 fitted with Hoffmann roller bearings.

I'm guessing that these tenders constitute Tender Order TO67. What's slightly confusing is that the date is 1936, though the first four would have been in service in Autumn 1935.

Obviously, if I lived near York, I could just drop in. Instead, I'm going to have to rely on mail-order.

[60129 GUY MANNERING]

Have you tried the "60007 Sir Nigel Gresley Society" website, then go to "A Tangle of Tenders".
Might just be of some help.
Regards.

[dlester]

Have you tried the "60007 Sir Nigel Gresley Society" website, then go to "A Tangle of Tenders".
Might just be of some help.
Regards.

Yes, thanks for that; a little google rummaging today turned that up. Sadly a preliminary skim didn't appear to mention Tender Order numbers (the reference mechanism used within the NRM drawing archive).

Howver, GB 756 2000-7200/R291 mentions Skefco bearings for a streamline corridor tender which is deleted from TO67. This seems pretty convincing evidence, as the only 5,000 gallon tender with those bearings was attached to 4493.

Anyway, looks like purchasing the GA (GB 756 2000-7200/R257) and sections (GB 756 2000-7200/R258) could permit me to get the streamline tender top etched.

[gdb]

Anyway, looks like purchasing the GA (GB 756 2000-7200/R257) and sections (GB 756 2000-7200/R258) could permit me to get the streamline tender top etched.

OOoohh, in 7mm scale possibly? I am intrigued that you intend to get just the top etched... might that be for a Finney frame?

regards, Graham Beare

[dlester]

Anyway, looks like purchasing the GA (GB 756 2000-7200/R257) and sections (GB 756 2000-7200/R258) could permit me to get the streamline tender top etched.

OOoohh, in 7mm scale possibly? I am intrigued that you intend to get just the top etched... might that be for a Finney frame?

regards, Graham Beare

Graham,

The sides and rear-end are easy enough to fret out from N/S, so I don't see the point in paying for them to be etched. The hopper can be filled with enough coal to hide the rivet detail. So that leaves the flat part with the water filler, the vertical piece between water filler and coal and the front. Last time I looked at the Isinglass drawing I seem to recall that there might be some differences in curvature between streamline and non-streamline corridor tenders at the front. Will check tonight.

As you guessed, I'm looking at the Finney (in my case 4mm) as a basis for a conversion, as it turns out that many of the most famous and well-regarded A4s were attached to TO67 tenders. (Silver Link, Quick Silver, Silver Fox, Dominion of New Zealand, Commonwealth of Australia, Golden Shuttle, Osprey). Originally, I was motivated by the idea that in early summer 1938, Osprey and Silver King were still in Green and Silver respectively; both attached to TO67 tenders.

Anyway, if I'm prepared to hand out my professional work under the open source GPL 3.0, I can't see why I shouldn't do the same for my hobbies.

[73D]

I hope you realise that the first streamlined tenders attached to 2509 – 2512 differ in quite a few ways to those built later and attached to 4491 - 4497. Something not covered in books!

The drawings you need are for the 1935 version, R-192, 10/1935 General Arrangement, 8 Wheeled Corridor Tender Water 5000 Gallons, Coal 8 Tons.

The 1937 variations can be picked up on: R-288, 3/1937 Tank for 5000 Gallon Corridor Tender.

Once you know the differences they can be picked out in photographs.

Three of these tenders were fitted with roller bearings:
5590 - Timken
5647 - Hoffman
5648 - Skefco

[dlester]

I hope you realise that the first streamlined tenders attached to 2509 – 2512 differ in quite a few ways to those built later and attached to 4491 - 4497. Something not covered in books!

The drawings you need are for the 1935 version, R-192, 10/1935 General Arrangement, 8 Wheeled Corridor Tender Water 5000 Gallons, Coal 8 Tons.

The 1937 variations can be picked up on: R-288, 3/1937 Tank for 5000 Gallon Corridor Tender.

Once you know the differences they can be picked out in photographs.

Three of these tenders were fitted with roller bearings:
5590 - Timken
5647 - Hoffman
5648 - Skefco

Richard,

Thanks for the heads-up, I'm aware of the detail differences (handrail length, coal space mods) mentioned in the Isinglass drawings: is there anything fundamental you're alluding to?

Anyway, thanks for the drawing references,

Dave Lester

[73D]

Dave

As you say the area around the filler is completely different. The 1935 version had a gully between the covered box surrounding the filler and the tender side, with a corresponding narrow division plate. This remained the case even after the cover was removed. Very noticeable on picture showing the top of the tender.

The later version was open with the division plate going right across, as in the 1928 corridor tender. The original rear cover on the 1937 version also covers the entire back area - no gully. The 1937 version also had a different profile for the rear plate.

Both versions had the rear covers removed and also the top front plating cut back to allow more coal to be loaded. The fillers were also shortened at this time. Drawing R288 shows the tank in this condition.

Hope this makes sense!