Search found 738 matches

by Julian Roberts
Sat Jun 15, 2019 8:14 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

I was going to illustrate completing the switch. Another turnout has taken priority. This is a Y turnout for the fiddleyard so function is the sole criteria. There is no attempt to conceal the joggles. Both roads have a slight bend at the set. I realised that the stockgauge needs to be slightly gaug...
by Julian Roberts
Fri Jun 14, 2019 9:55 am
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 301
Views: 42699

Re: Brimsdown-The last grand project.

:thumb Inspirational work and thread Tony. I'm trying to work out if my eye is deceiving me - are some of the E switches curved on both roads?
by Julian Roberts
Wed Jun 12, 2019 7:23 pm
Forum: Semaphore Signals
Topic: Signals for Hessle Haven
Replies: 23
Views: 3847

Re: Signals for Hessle Haven

:thumb thanks Keith! Would look impressive in P4 Mike....
by Julian Roberts
Wed Jun 12, 2019 4:17 pm
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2425

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

Yes Paul possibly but access to layout is limited timewise and it's a lot easier to make from new at home than stoop over the layout fiddling around making tiny adjustments. (By the way this point was not the one featured in the video; I'm sure people realize that but just thought I should clarify.)
by Julian Roberts
Wed Jun 12, 2019 4:04 pm
Forum: Semaphore Signals
Topic: Signals for Hessle Haven
Replies: 23
Views: 3847

Re: Signals for Hessle Haven

Yes wonderful sights, thank you Mike. I was getting excited to see single semaphore signals still in use at Girvan on the line to Stranraer last Monday! In fact excited that there is still in this day and age a substantial line controlled entirely by semaphore signalling all the way there, with mann...
by Julian Roberts
Wed Jun 12, 2019 8:44 am
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2425

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

Too late Dave I'm afraid! It was felt that other people had problems there too so was worth another go. Nothing wrong with the crossing however.
by Julian Roberts
Wed Jun 12, 2019 7:30 am
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2425

Re: REF: Rail wheel profile and "to do" list update/weight matters!

I had the following written before I saw your post Will. Lots to think about there. From the current Snooze No 212 The Bardfield Chronicles 20190612_074126-1.jpg I think what my approach (disproportionately weighting the leading wheels) does is compensate for all-too-possible track imperfections. I ...
by Julian Roberts
Mon Jun 10, 2019 7:12 am
Forum: Guest Book
Topic: REF: Rail wheel profile and "to do" list update
Replies: 25
Views: 2425

Re: Weight matters!

Re my previous post of around April 25. Re Nadel's formula and Dave Bradwell's analysis, but correctly taking into account the added downward constant force due the vehicle weight, it is clear that rail climbing derailments are reduced by making the vehicle heavier, regardless of the suspension sys...
by Julian Roberts
Sun Jun 09, 2019 6:36 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

Thanks for the advice Dave and Martin - I will do that if I get into doing more Dave. But my next project is a fiddleyard turnout. I think pcb is a slightly underrated medium. This would have been a lot more faff with ply and rivet. Yes Martin I had forgotten for this print out but had a previous te...
by Julian Roberts
Sat Jun 08, 2019 7:19 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

The thread diverted to undercut blades, the alternative to joggled stockrails. I added the photo of two of my turnouts with undercut blades to the previous post. Now back to making a turnout with joggled stockrails as per the opening posts. In fact I'm just making the switch end of an existing turno...
by Julian Roberts
Thu Jun 06, 2019 8:20 pm
Forum: Track and Turnouts
Topic: Gauge widening with C&L plastic track
Replies: 4
Views: 566

Re: Gauge widening with C&L plastic track

I have a pair of the roller gauges supplied by C&L, which do not hold the rail tightly. These seem to be fine for constructing plain stright track with a correct TG measurement, but do not incrporate a gauge widening feature for curves. Many thanks, Liam Hi Liam C&L did do their roller gaug...
by Julian Roberts
Mon Jun 03, 2019 5:13 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/ sideplay effect with undercut blade

Allan I'm glad Tony was able to be more helpful! - I should have said, most of what I know (via the internet as opposed to personal contact) comes also from him especially https://www.scalefour.org/forum/viewtopic.php?f=5&t=5727 Last drawing shows the sideplay of wheels on the diverging switch r...
by Julian Roberts
Mon Jun 03, 2019 8:35 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/horizontal planing of undercut blade

" Surely the switch blades are not going to bear the whole weight of the wheel until the switch blade is wider than the wheel tread? Allan F Allan - most ideas I have on this subject (at least, via the Internet) come from Templot Real Track... http://templot.com/companion/real_track.php Screen...
by Julian Roberts
Sun Jun 02, 2019 9:21 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/Undercut blade horizontal planing

How long is the blade of Dave Bradwell's drawing - is it an A, B, C....? Well, given that the extra slope towards the tips is 7 inches the drawing nearest equates to a B blade as far as I can work it out, using a vernier on the image on the screen. I thought I'd draw out the two types of horizontal ...
by Julian Roberts
Sat Jun 01, 2019 11:47 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/undercut blade considerations

Dave (Bradwell) there are two gradients on the blade tip of your elevation drawing. How far below rail level is the tip of the blade on your drawing, how far is it till it is at full height and how far along does the first gradient end? Hi Julian, Here are some better quality scans. Bear in mind th...
by Julian Roberts
Thu May 30, 2019 9:01 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

Hi Julian, My sketch was intended to show that IF the tip is reduced to zero width at the gauging depth, then the gauge is unaffected and no joggle is needed. And that it can have a finite thickness below that depth in a practical model switch without affecting the measured track gauge. It wasn't i...
by Julian Roberts
Thu May 30, 2019 8:42 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

zero_tip_end.png
zero_tip_end.png (29.24 KiB) Viewed 1800 times


Martin your sketch is showing an undercut switch with the top of the tip at the gauging line 18/32" below rail top level with an effective width of zero. Tony describes this tip top to be 23/32" below rail level.
by Julian Roberts
Wed May 29, 2019 7:18 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/undercut blade considerations

The gauging point of 9/16" below rail level in Martin's diagram is 18/32" (scale 0.19mm). The reduced rail height described by Tony of 1/32" under 3/4" is 23/32" (scale 0.24mm). The difference is 5/32", scale 0.05mm, or 0.002". Tony has the rail height rising to f...
by Julian Roberts
Mon May 27, 2019 7:54 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/undercut blade considerations

Interesting discussion, I must admit I was shown how to file switch blades many years ago and read similar in the magazines since. The NER drawing seems to confirm my way of doing things too, I have shown others how I do it over the years for all three 4mm gauges and have been seen to work, any der...
by Julian Roberts
Mon May 27, 2019 4:13 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

That looks similar/identical? to the diagram further down on your link earlier Martin from a contributor Richard R.

http://85a.co.uk/forum/view_topic.php?i ... d=6#p19571
by Julian Roberts
Mon May 27, 2019 9:34 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

Dave (Bradwell) there are two gradients on the blade tip of your elevation drawing. How far below rail level is the tip of the blade on your drawing, how far is it till it is at full height and how far along does the first gradient end? I assume the answer to the 2nd and 3rd question varies accordin...
by Julian Roberts
Sat May 25, 2019 5:29 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/undercut blade considerations

I'm extremely grateful, Martin and Tony, for your responses to my questions on this thread. To me you are the ultimate authorities on track matters. I see no paradox if there is a minute subtle disagreement between you, on the height of the undercut blade at its tip. So I'm writing this simply to po...
by Julian Roberts
Fri May 24, 2019 10:21 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails/undercut blade considerations

Just to make the point that if we have gauge narrowing of say 0.1mm at the tip (because the thickness of a B switch blade can't be as little as 0.33, which is little more than the width of a piece of foil) the reason we can often get away with it is our nice generous standards. If we have maximum BB...
by Julian Roberts
Thu May 23, 2019 10:03 am
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 6504

Re: Joggled Stockrails

Hi Martin I absolutely take on board what you say and followed your filing instructions on previous turnouts. However as I filed the chamfer ever thinner towards the tip, what happens is that it begins to slightly lose height... :idea: exactly what is needed! It's perfectly simple! - though to get r...
by Julian Roberts
Wed May 22, 2019 9:17 pm
Forum: Track and Turnouts
Topic: Turnout construction - Question here please.
Replies: 126
Views: 20367

Re: Turnout construction - Question here please.

:D :D In PG Wodehouse land?


20190522_230412.jpg
Still no butterknife.


I wonder what he uses to eat The Gentleman's Relish ;)

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