Enter the "Dairymaid"


Well, brother beginners and those other good folk who want an engine which they can get on the road with the minimum of time and labour, let me introduce you to the Dairymaid, otherwise the small edition of the Urie-Drummond 4-4-0. She collected up a nickname naturally enough, the initial letters of Urie-Drummond immediately calling to mind the milk combine (United Dairies), so there we are ! I give herewith a general outline of the engine part, with a detailed sketch of main frames incorporated with it; and between you me and the gatepost, it took no end of a lot of wangling out, as you all know by this time Im no fist with a pencil. My usual plan is to build the engine first, and then make sketches, etc., afterwards; but in this case having only just got my little workshop ready for action again, I've had to follow the old stereotyped stunt of first putting it on paper, incidentally, it has made me realise why it is that so many published designs are full of snags; but if any come to light in this lady I'll be one of the first to find them out. I intend to get busy on the engine at the earliest possible moment in order to catch up and pass the written description, so I can revert to my old familiar style and offer a "guaranteed job," especially as regards cylinders, motion and valve setting. I have put in for permission to utilise a vacant "lot" close to my garden for the purpose of erecting a long track; and if it comes off shall build a 3-in. gauge "Dairymaid", otherwise it will have to be 2-in. Let's hope for the best! I prefer the bigger one.

If you compare the sketch with the photograph, you will see that there is some slight difference in outline and details. I've no use for the "scale model" antic, but just design and build an engine to do a specified job to the best of its ability, sacrificing "scale details" and suchlike for the benefit of greater efficiency. This is so in the case of the "Dairymaid". The main frames slope upwards at the front end to get increased strength over the leading bogie wheels; and when the cylinder flap is on, the steam-chest lubricator will be rendered inconspicuous. However, if anybody wants to cut out the extra bit they are welcome. The frames also are much higher above the running board than on the original, and the boiler is bigger in diameter and pitched higher, owing both to its own size and the "larger than scale" driving wheels which are given to please many brothers who wanted an engine to run like -- well, a deer, shall we say? I have kept the wheelbase as short as possible so she will traverse all ordinary curves at a good speed; but the extended smokebox, a feature of the original, will prevent her looking stumpy.

The constructional series appeared in The Model Engineer between 13th November, 1930 and 9th July, 1931.
The Association can supply photocopies of the constructional series to members.

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This page was last changed on 08/05/2016