Venturing Between the Frames
Our June meeting was held at Phil R's house in Stoke on Trent. This is the first time we have been to Phil's, as far as I'm aware. Despite him providing accurate directions at least two of us managed to get ourselves conclusively lost, despite the rout being "obvious" when you know it. None the less, 11 members were there in good time to enjoy a meeting who's theme was "Inside Valve Gear". As well as a sufficiency of seats and the necessary floor space, Phil provided the brews, chocolate biscuits, and this above and beyond the call of duty, cup cakes. Our thanks are due to him for his hospitality.
Pursuant on our theme, quite a range of inside valve gear was on display. Much of this had a GWR flavour, coming, as it did, from David B's collection, but we also had a mostly completed Brassmasters 4F by John S, and a separate and fully functional driving axle assembly built by Tony S from the Brassmasters etch. The models presented included some with cosmetic and some with working gear, though none of it was reversible! There was even one with a fully featured crank Axel. Much inspection of models both static and in motion led to the view that what ever you did some compromises would be necessary, and the question, why would you want to get into this at all?
The answers seemed to go something like this
1. Because it's there. I am quite persuaded by this argument in general, various bits of my loco's tend to fit with this philosophy, but it was quite clear that on some prototypes the inside gear was all but invisible. The High level pannier chassis springs to mind. Does make you wonder why we fail to model the inside of, say, the smoke box. This discussion led in turn to a little contra concern from Dick about things that are visible but are often poorly represented. He had ash-pans in mind.
2. Because on some Loco's there is a yawning great gap between the frames that does need something in it. Only too true I'm afraid though there are graduations between this and the previous argument. But then you get into the discussion as to whether the gear should be dummy or seen to be working, even if not reversible.
3. Working inside gear really requires a real crank axle which is engineering beyond the kitchen table. So I, at least, wont be going there. The Brassmaster gear cheats a bit and uses eccentrics. The resultant lump of assorted bits on the driving axle left you wondering if the gear would allow full movement of a sprung/compensated suspension, presumably the theoretical answer is yes.
4. Visible dummy gear can be disappointingly static, but possibly not significantly worse than outside valve gear in permanent mid gear and valve spindles which are either stationary or going the wrong way. It does appear to be possible to arrange a U shaped hole through the middle of that mass of detail that allows springing or compensation to work.

- A fairly cruel blow up of the gear on the Brassmaster 4F installed below the boiler. This particular installation is non functional.
- june 4f.jpg (166.4 KiB) Viewed 427 times

- This is the Brassmaster inside gear driving axle assembly. Complicated, a tight fit between the frames, and as assembled here, functional.
- june gear.jpg (201.03 KiB) Viewed 427 times
Intermingled with out themed discussion was further talk about the proposed Knutsford extension. Dick had a pencil sketch of the proposal. Among its features will be a freight loop and a private siding including a further double set of trap points which should amuse those interested in the finer points of track work construction.
Future meetings also got further consideration. Firstly we agreed that, given good weather, our July meeting will be thrown open to our WAGs (this is Cheshire!) and will include a cream tea. Secondly Adrian went over what he planed to cover in his painting and lining session in August. He is expecting to allow us hands on experience and so he wants us to turn up with prepared samples to work with. It all sounds like fun, and just shows you what a good idea area groups can be.