Search found 1434 matches

by Will L
Fri Jun 14, 2019 9:37 pm
Forum: Tools and Techniques
Topic: Track cleaning
Replies: 51
Views: 1621

Re: Track cleaning

Interesting, looks like the guy may have invented graphene. I've never been convinced by the suggestion you would significantly damage your rails with an light abrasive cleaning method. A view reinforced by exhibiting a layout for 15 years about 4 times a year with regular use in-between shows. Plen...
by Will L
Fri Jun 14, 2019 11:12 am
Forum: Tools and Techniques
Topic: laser welding
Replies: 11
Views: 462

Re: laser welding

Oh I don't know, but nothing you couldn't do just as well with one of the spot welders at a much lower price?

You do wonder what happens if you let your finger et in the way.
by Will L
Thu Jun 13, 2019 3:04 pm
Forum: Semaphore Signals
Topic: Signals for Hessle Haven
Replies: 23
Views: 2883

Re: Signals for Hessle Haven

You do have to admit that the NER weren't afraid of interesting pointwork
by Will L
Tue Jun 11, 2019 10:18 pm
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 1555

Re: REF: Rail wheel profile and "to do" list update

I think there is little doubt that sufficient weight is necessary to stop the leading wheel from climbing the rail on corners, This is the implication of Nadal's formula, not to mention the real world accident investigations that Julian is fond of quoting. None the less, to assume that just because ...
by Will L
Fri Jun 07, 2019 2:31 pm
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1121

Re: Waisted bearings for Bedford sprung W irons?

... So far I’ve had no success in making such a large slot without damaging the casting; perhaps the outer face of the bearing could also be filed down a bit? Yes you can file off much of the bearing. Think about it,the waisted bearing should have exactly the same size hole on the inside as the sta...
by Will L
Thu Jun 06, 2019 4:48 pm
Forum: Wagons
Topic: Waisted bearings for Bedford sprung W irons?
Replies: 23
Views: 1121

Re: Waisted bearings for Bedford sprung W irons?

Interested to know how much of a problem the slight slop is .... is it visible when the wagons are running on the track? I suppose a tad of slop it could be argued might be a good thing? I have used Gibson waisted bearings on my wagons and have not noticed a discernable problem .... I will look mor...
by Will L
Wed Jun 05, 2019 7:26 pm
Forum: Layouts and Operations
Topic: Onward from Ambergate
Replies: 99
Views: 27234

Re: Onward from Ambergate

Doing the timbering under the Tandem is going to be interesting.
by Will L
Tue Jun 04, 2019 3:37 pm
Forum: Railmotors, Railcars and Multiple Units
Topic: Why the big windows?
Replies: 23
Views: 2216

Re: Why the big windows?

I was amused by the apparent subtle differences in the attitude to track side safety for the track maintenance gangs.
by Will L
Mon May 27, 2019 6:45 pm
Forum: Exhibitions
Topic: RAILEX 2019
Replies: 54
Views: 4856

Re: RAILEX 2019

Perhaps those doing demo's at Scaleform had better remember to bring their own lighting?
by Will L
Fri May 10, 2019 12:16 pm
Forum: Other Buildings and Scenery
Topic: Alpha Mill
Replies: 130
Views: 18171

Re: Alpha Mill

Just a thought, but couldn't you get Howard to re do the animation as viewed from the windows and just install a small screen?
by Will L
Fri May 10, 2019 12:04 pm
Forum: Chassis and Suspensions
Topic: Singles and suspension
Replies: 14
Views: 613

Re: Singles and suspension

I have all but ruled out CSBs, as a solitary driven axle doesn’t bode well with them... Why? I know that conventional wisdom on CSBs has suggested in the past that you need the centre of three axles slightly softer than the outer two to prevent porpoising (rocking around the centre axle) but experi...
by Will L
Fri May 03, 2019 7:35 pm
Forum: Signals and Control Systems
Topic: Arrangement of levers in a signal box (calling at the Quintinshill disaster, use of collars and setting back)
Replies: 52
Views: 3549

Re: Arrangement of levers in a signal box (meandering into the Quintinshill disaster)

I recall one P4 layout, relatively recently (but can't recall the name), where Single Line Working was shown. I think that was the only time I've ever seen it done in model form. Possession of the up line, Knutsford East, at Scalefour North in 2013, perthaps? Yes John (see I can get it right) and t...
by Will L
Sat Apr 27, 2019 10:41 am
Forum: Starting in P4
Topic: Problem Arising From My First Morgan GWR Underframe
Replies: 13
Views: 1205

Re: Problem Arising From My First Morgan GWR Underframe

Jeremy may well be right and you may have assembled something the wrong way round. However there is another possible explanation. As we have discuses else where (see below), the combined length of axle and pinpoint bearings can be a bit variable, so you should not be too surprised if this sort of th...
by Will L
Mon Apr 22, 2019 10:39 pm
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 1655

Re: rail/wheel profile - prototype has problems too

Consider the horizontal force needed to push a vehicle back into line if it hunts and the leading flanges strike a rail. Using F=ma, the mass decreases (clearly) as the cube of the scale factor and the required acceleration as ... the square of the scale factor? Because the acceleration needed is l...
by Will L
Sun Apr 21, 2019 9:53 pm
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 1655

Re: rail/wheel profile - prototype has problems too

An Easter Day debate revolves in my mind Will. I don't see how the scaling effect of physics favours us particularly. Even though we all know that toy model trains comer unrealistic fast? And that Andy's video clip demonstrates this can also be true for scale wheels? I would have thought that the e...
by Will L
Sun Apr 21, 2019 10:13 am
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 1655

Re: rail/wheel profile - prototype has problems too

A few years ago, the American Passenger Transport Association were evaluating a proposal to adopt a different wheel profile for LRT trains, one with a greater flange-contact angle. The idea was to allow higher speeds on sharp curves. Makes me think that a less-prototypical profile might help our ov...
by Will L
Thu Apr 18, 2019 7:51 pm
Forum: Track and Turnouts
Topic: rail/wheel profile - prototype has problems too
Replies: 22
Views: 1655

Re: rail/wheel profile - prototype has problems too

A few years ago, the American Passenger Transport Association were evaluating a proposal to adopt a different wheel profile for LRT trains, one with a greater flange-contact angle. The idea was to allow higher speeds on sharp curves. Makes me think that a less-prototypical profile might help our ov...
by Will L
Tue Apr 16, 2019 6:50 pm
Forum: Jeremy Suter
Topic: Turning a chimney
Replies: 19
Views: 1577

Re: Turning a chimney

Excellent post as always Jeremy. While I'm not a lathe user, I thought i understood fly cutting but the flair jig was a new one on me. Very clever. I think I see how it works but a bit more detail on how you use it would be interesting. For instance, presumably you need several passes moving the fla...
by Will L
Fri Apr 12, 2019 5:17 pm
Forum: Starting in P4
Topic: P4 wagon Compensation(springing)
Replies: 31
Views: 2114

Re: P4 wagon Compensation(springing)

Gordon Bennett! As there appears to be a stone wall preventing resolution of the bearing/axleguard compatibility issues, I'll go back to my main point which was to use the plastic axleguards, slotted, in order to save a lot of work replacing them and adding castings. What's wrong with that then? Ab...
by Will L
Fri Apr 12, 2019 5:14 pm
Forum: Starting in P4
Topic: P4 wagon Compensation(springing)
Replies: 31
Views: 2114

Re: P4 wagon Compensation(springing)

Any rigid or compensated wagon can live with the W irons flexed away from the vertical. As someone who has quite a lot of both, I wouldn't recommend it. It's likely to result in a vehicle which won't run properly. In uncompensated axles it can result in wheelsets which won't rotate, or which have n...
by Will L
Fri Apr 12, 2019 11:01 am
Forum: Starting in P4
Topic: P4 wagon Compensation(springing)
Replies: 31
Views: 2114

Re: P4 wagon Compensation(springing)

I'm not interested in the variables - And I found them unavoidable, for reasons Bill just pointed out, and as Russ explains in his article to which I linked. The fact is that anybody who starts putting assorted wagon kits together is likely to find that wheel axle/barring fit between W irons is inc...
by Will L
Thu Apr 11, 2019 7:36 pm
Forum: Starting in P4
Topic: P4 wagon Compensation(springing)
Replies: 31
Views: 2114

Re: P4 wagon Compensation(springing)

I'm with Keith on this, and its not just the bearing cups that vary, its the axle length and the "natural" distance between the W irons from kit to kit. None of these should be very big, but taken together can be big enough to be noticeable. Follow this link to the CLAG website where Russ ...
by Will L
Thu Mar 21, 2019 5:35 pm
Forum: Lathe Work
Topic: Inside threaded rod
Replies: 6
Views: 1251

Re: Inside threaded rod

Rather than solder brass nuts on top of brass sheet (not the most secure) I thought I would take advice and the solution seems to be to be as per the picture enclosed. John you could try soldering the nut over a slightly undersize hole and use a tapered tap to extend the thread through the sheet. E...
by Will L
Tue Mar 19, 2019 5:29 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 257
Views: 31820

Re: Crab Comet conversion

We clearly have differing views on this and that's fine. The key thing is to have satisfactorily running locos, whatever the design features. Dave Can't argue with that. However, I'm not sure how having a pony truck sliding on bearing pads, with the axle sprung within the truck with simple wire spr...
by Will L
Tue Mar 19, 2019 12:20 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 257
Views: 31820

Re: Crab Comet conversion

... I don't like to see daylight between trucks/bogies and the loco chassis. This is both visually and functionally un-prototypical for me. You have to agree with that and through keeping the pony truck/bogie in prototypical contact with the main chassis is certainly a fair way to achieve that, I d...

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