Scalefour Forum

Dave Holt wrote:Do Gibson not supply a 3 mm axle wheel that is suitable?

Not in his listings unless the 5'3" Ivatt wheels (16sp) would do. The 3F/4F wheels have 2.5 mm axles.

I would suggest getting the 1:8 turnout bases for the turnout and the double slip, easier than individual timbers. You need a triangular track gauge, item 190, not the i97 gauge, the latter is Ok for checking platform clearance and buffer height, not much use for building track. The 192 gauge is a s...

I haven't bought any wheelsets recently but previous experience was that they usually came a little long and needed to be shortened, given the variety of wheel bosses, supplying the axles at the longest rather than the shortest seems prerferable.

That Abbotford diagram has the text for FPL 14 in a confusing place, looks as though it refers to point 26 when it should be for point 29. I presume you mean Andoversford, Keith. FPL 14 does relate to 26; the branch is single, and the blue line behind it is a siding [probably a lie-by], 29 being th...

I think I would drop disc 14, no need for it. Well, not if you are happy that all the loco crews will notice that 13 has been reversed, somewhat risky IMHO. That Abbotford diagram has the text for FPL 14 in a confusing place, looks as though it refers to point 26 when it should be for point 29. And...

re item 1. See the diagrams for Melksham and Limply Stoke Tim posted, both follow the convention Noel recommended. re shunt signals, I would swap the numbers for 14 and 15 to keep the entry signal lever next to its crossover..To protect moves over 13, then (my number) does need to apply to all the s...

I am not at all sure that you are right to allocate 11 to both ends of the trailing crossover, and same for 13 for going into and out of the shed yard. Indeed this is a no-no, setting up a head on collision on the main lines. Each of those 4 shunts should have its own lever, usually either side of ...

Tim, Both the diagrams you put up have shunt signals reading over trailing crossovers up to the section signals, which bit is not GWR? Having two discs? 14 reads to the turntable, 13 to the up as there are two possible routes over the crossover. having one disc read either way is an option usually p...

He doesn't have a route wrong direction on the Up main, 13 reads in the up direction towards signal 3 which would be the section signal.

Standard GWR practice would see 15/20 as a crossover, with 20/24 as another crossover. Yes, that's how I would do it, hence my first comment. But FPL 25? Not needed. And where are the two routes 13/14? I can only see one route there into the yard. If you were pulling 13 off to run along the up main...

Is this a prototype numbering plan or one you have developed? Just that I would not expect the slip to be set like that, but some prototypes were unusual! And I can see some benefit if moves on and off the turntable are significantly more frequent than use of the trailing srossover via the slip. I d...

Thanks Andy, that will help me sort out the bits I have.

Ah,
The really new type, my bits are the Bernard era mark 2.

I would also like instructions, I'm sure I had some once! But I do have some parts so can probably help if you can work out what's missing.

I am also mindful of the implications regarding the static deflection when the beam is under the axle, that is to add the static deflection 0.5mm to the distance between the axle centre line and the carrier tag hole. The static deflection at the axle is upwards, so as I see it the 0.5 mm would be a...

Doesn't matter which way round it is, it converts a pull on one side to a push on the other regardless of orientation so just needs to be half way along the rodding run.

All the vids show it being used without a guard, be easy to lose a finger like that. There is a perspex guard with it as its shown on the pic with a PCB and in the photo of contents. They really should be using it in the vids.

Chris explained that in some detail just 2 posts back.

Interesting report that, a litany of incompetence.

I do remember a suggestion being made in relation to the P4/Studiolith 2:1 gearboxes that 2 shafts could be used, one rotating in each direction. It meant using two such gearboxes,and I doubt anyone tried it.

As built most 16T minerals had the white line running from the edge of the vertical framing next to the side door to the edge of the vertical framing next to the end door, at the level of that door's hinges, but without going onto any part of the framing, i.e. the ends were vertical, not at right a...

Can you not buy 3/32" rod and just cut to length?

I expect that was normal 00 fine at 16.5. The Problem with that is the need for a wider back to back than that offered by RTR. Hence the 16.2 is to get the finer flangeways and still allow use of RTR. I don't think that 16.2 was in the picture in KX Models days, and the RTR was not what we have toda...

Blade filing jigs are a luxury rather than a neccessity, I have always done a TErry suggests and used a sawcut in a ply or MDF offcut to hold oneside of the foot while the other side is filed down.. The planing length is shown on the Templot diagrams and easily marked on the offcut as a filing guide...

The reason for my original query, the value of gauge widening needed, is that I’m considering various CAD/CAM methods to produce both the harbour and non-scenic trackage with maximum accuracy – so as mentioned above, I'll need to include gauge widening at the design stage. I suspect ypou are being ...