Hi,
Many yonks ago, I made a model of Barbara's Reliant Sabre 6 361WYD (Google for images) to a scale of one millimetre equals one inch (approx 1/25th).
I started with a length of 1" x 2" PAR timber, cut into four short lengths, which were fret-sawn to the side elevation, then glued together. I then carved that block to shape with a Stanley (craft) knife, and finished off with sand-paper. The head lamps were drawing pins
Not a bad representation, if I say it myself.
No, I didn't finish it ... I couldn't find any one inch diameter wire wheels. OK, maybe I didn't look very hard. Or maybe I could have got somebody to turn me a set of "steel" wheels on a lathe.
I made two such bodies, both of which keep turning up, in odd corners of the house, nearly forty years later.
Whatever ....!
I'm pondering on making a 1/12th scale model of an SWB S2 chassis frame, out of brass bar (£££). That will be about 12" long, 1/4" wide side rails, but I haven't yet measured the depth of the chassis rails ... and nor have I checked the factory "coach builder's" drawing - it's virtually illegible, and anyway, it's a 109" which has deeper rails.
I haven't yet found drawings of the cross-members, nor out-riggers, but they can be cut off a scrap chassis, and measured on the bench. Even a decent photograph could be enlarged, and scaled. Everything to be soft soldered.
Once the chassis is complete, I'll ponder on springs, axles and wheels.
The embrionic plan is to copy the chassis drawing in the Green Bible (Hey, it passes the time!) and enlarge it to the required size. Then empty my garage, and erect my work bench. So don't hold your breath.
If anybody can suggest where to find a better/usable chassis plan for an 88", I'd be grateful.
602