A form of the Yarrow boiler has been used in locomotives. One type of which, the Brotan Deffner, was used in Hungary Mav 327 and other classes of locomotives, but apart from one or two picture of the locomotive (see in MAV327.jpg) I can learn little. Most of the records and locomotives were lost during the ‘unpleasantness’ with the late and extremely unlamented Herr Hitler, although I have heard a rumour that a tank locomotive at Kiskunhalas has a Brotan-Deffner boiler but from the pictures I am unsure. Some of them had the Steam Reservoir inside the main boiler tube. I may go and look at it next spring. I have also found some pictures of small shunters which seems to have all the characteristics of a Brotan-Deffner boiler.

Do a Google for Brotan-Deffner and pick the ones that have words you cannot recognise _Hungarian) there are some good illustration, but the Google translation into English is a ‘bit quaint’.

The Brotan-Defner boiler was a modification of the original Botron, but here the steam reservoir was connected directly into the main fire tube boiler. This made the boiler rather tall
There are a few models in the Budapest Transport Museum but weather they work or not i have no idea.

Hungarian Botran-Deffner

 

Hi Phil,

This is how to add pictures.

 

1 Click on “My Photos” (Under “My Account” at top left of Home page.)

2 Click on “Create a Photo Album” (Fill in a name and description for the album)

3 Click on “Create Album”

4 Click on one of the “browse” buttons. (Navigate to the folder and photo you want to upload. They must be in .jpg format.)

5 Repeat this to select up to three more photos then click on “Upload Photos”

6 If you want to add more photos click on “Edit Album Info” and then click on “Add More Photos” (As in steps 4 and 5)

Now you have the pictures in “My Photos” on the website you can insert them into your reply on the forum.

To do this click on the “insert image” button at the top of the “Post a reply” box (Next to last button)
This will show you the albums you have uploaded. Now select the photo you want to insert.

Les.

Hi Kinlet Hall 4396,

 

Where did the boiler on the 5″ gauge model warp and crack? I’m not aware of any of the boiler failures on the full size 10,000.

 

I see the front course of water tubes on the model was made longer front to back than the original boiler’ front course of tubes. Was this done for more heating surface in the model version of the boiler?

 

Thanks for posting the pics. Looks like a nice model in any case, well done to the builder.

 

Now if we could just hear from the original poster Alf (!?)

 

JD

 

There is a very recent book on 10000:

 

 

There is an O-gauge kit for the loco, and at least one very impressive model in that scale has recently been published in the Gauge 0 Guild Gazette.

 

David

“Suggest you read the book suggested by David – from what I remember it gives all the details of why and how the boiler failed”

 

I was hoping for a brief summary of what happened to the model. Books like David mentioned are nonexistant in my local library and I am not interested enough in locomotive 10,000 to fork out a lot of money to buy and ship such a book.

 

A brief summary would be appreciated and may also help Alf the original poster, as he is considering making a Yarrow boiler.

 

JD

Hi David,

 

I would like to buy the book, but in the past when buying books from the UK it can get expensive fast. Added to the purchase price are shipping, brokerage, 13% provincial sales tax, and sometimes duty (since there are different duties payable on certain categories of technical books in Canada where I am, and the rules are almost always misapplied to steam hobby books). With all these “money grabs” the 20 pound amount you mention could easily become 80 or 100 pounds, which far exceeds my book budget. It has happened to me in the past. Maybe if I visit UK in future (I do pass through periodically, flying on business) I’ll make arrangements to get a copy in person and carry it home.

 

JD

I think there has been a 3 1/2 version displayed a few times on the North London Club stand at the Ally Pally show. I don’t know whether it has a yarrow boiler but I recall it is an excellent quality model.