Search found 88 matches

by Simon_S
Thu Jan 14, 2021 3:43 pm
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 466
Views: 98924

Re: Brimsdown-The last grand project.

A trick I was taught is to short a large, charged capacitor across the unwanted short circuit, the theory being that the discharge current would vapourise the fault. It got me out of trouble once but try at your own risk :shock:
by Simon_S
Wed Dec 23, 2020 7:22 pm
Forum: Tim V
Topic: Re: Tim V's workbench - latest shenanigans
Replies: 418
Views: 153529

Re: Tim V's workbench - latest shenanigans

While a lathe is the best way to skim the wheels, it can be done with hand tools: Kitchen table P4 conversion of RTR loco wheels
by Simon_S
Tue Oct 13, 2020 9:07 am
Forum: Chassis and Suspensions
Topic: Kitchen table P4 conversion of RTR loco wheels
Replies: 3
Views: 1251

Re: Kitchen table P4 conversion of RTR loco wheels

Could you post some close-ups of the wheels and chassis in question? If DJ used the same factory as Heljan then there's a good chance that this will work.
by Simon_S
Wed Oct 07, 2020 10:30 am
Forum: Chassis and Suspensions
Topic: CSB for a Single Driver
Replies: 50
Views: 5495

Re: CSB for a Single Driver

Hi Stephan, in my mind the anti-pitch bar can't bear any weight because it is free to rotate in its chassis mounted bearings; a bump lifting the front axle would also lift the rear axle (which might be a problem in itself) and the loco will pitch nose-up to a new equilibrium attitude. Correctly appo...
by Simon_S
Tue Oct 06, 2020 9:10 am
Forum: Chassis and Suspensions
Topic: CSB for a Single Driver
Replies: 50
Views: 5495

Re: CSB for a Single Driver

Been following with great interest. It seems to me that even 30/40/30 might put too much weight on the leading & trailing. Clearly, going too far would lead to oscillating. 1/98/1 for example. But I'm wondering if 20/60/20 would work, or 25/50/25. Stephan I'm picturing an anti-pitch bar - like ...
by Simon_S
Wed Sep 09, 2020 8:32 am
Forum: Starting in P4
Topic: Making a Start - The Peak District Midland / Monsal Dale pre 1903
Replies: 1221
Views: 249321

Re: Making a Start - The Peak District Midland / Monsal Dale pre 1903

The laying of the stones seems much more random and un-coursed than Daves Cotswold version I've done a bit of walling. Stones would by picked up nearby so you get what the local geology gives you to work with - lovely square slabs in the Cotswolds or irregular angular blocks in the Peaks for exampl...
by Simon_S
Mon May 04, 2020 1:05 pm
Forum: Railmotors, Railcars and Multiple Units
Topic: P4 Conversion of Bachmann Split-axle Bogies
Replies: 7
Views: 5598

Re: P4 Conversion of Bachmann Split-axle Bogies

Yes, should work for the EPB too but the length and width may need to differ.
by Simon_S
Fri Mar 13, 2020 5:41 pm
Forum: Railmotors, Railcars and Multiple Units
Topic: P4 Conversion of Bachmann Split-axle Bogies
Replies: 7
Views: 5598

P4 Conversion of Bachmann Split-axle Bogies

Some Bachmann RTR vehicles come with split axles with electrical pick-up through the axle bearings. They run very freely but, unfortunately, some types are too narrow for P4 wheelsets. Here’s how I widened the bogies of a Bachmann/Kernow 4TC. 1. The bogie as supplied: DSC_0998.JPG DSC_0999.JPG 2. Po...
by Simon_S
Sun Feb 09, 2020 5:37 pm
Forum: Chassis and Suspensions
Topic: Kitchen table P4 conversion of RTR loco wheels
Replies: 3
Views: 1251

Kitchen table P4 conversion of RTR loco wheels

There has been much discussion about converting RTR loco wheels to P4 by machining the original tyres on a lathe and press fitting P4 tyres. I thought I would see if this could be done with just hand tools. My guinea pig is a Heljan class 07 0-6-0 diesel shunter with 3’ 6” diameter wheels of a quite...
by Simon_S
Tue Nov 26, 2019 5:01 pm
Forum: On My Workbench
Topic: High Level 03 Chassis Build
Replies: 44
Views: 12265

Re: High Level 03 Chassis Build

Very easy, the only slight difficulty is fabricating the three legged ones; suggest making drilling and bending jigs as there are several to do.
by Simon_S
Thu Nov 14, 2019 9:09 am
Forum: Exhibitions
Topic: Wakefield Exhibition Nov 16/17/18
Replies: 10
Views: 3923

Re: Wakefield Exhibition Nov 16/17/18

The 2019 Wakefield RMS Exhibition is this weekend and we'll be flying the P4 flag with Birmingham Moor Street. Do come and say hello :D

PS. I know there are a lot of shows in Wakefield but how come this year's show is the 58th if 2018's was the 50th?!
by Simon_S
Tue Aug 06, 2019 9:33 am
Forum: Track and Turnouts
Topic: Modern Era Concrete Track
Replies: 26
Views: 4459

Re: Modern Era Concrete Track

Hi Nick,

You might also consider Colin Craig's modern track products.

Simon
by Simon_S
Fri Mar 08, 2019 9:13 am
Forum: Semaphore Signals
Topic: close up photos of GWR tubular signals
Replies: 13
Views: 3263

Re: close up photos of GWR tubular signals

Thanks for the answers. Honeybourne is just down the road from me. There were several boxes for its incredibly complex set of junctions, maybe this signal was repeated in a box the other side of the bridge.
by Simon_S
Thu Mar 07, 2019 1:14 pm
Forum: Semaphore Signals
Topic: close up photos of GWR tubular signals
Replies: 13
Views: 3263

Re: close up photos of GWR tubular signals

Just curious, what's the rectangular box with wires going in to it?
by Simon_S
Sat Feb 09, 2019 9:54 am
Forum: Steam Locomotives
Topic: GWR 1366PT - Heljan Model
Replies: 27
Views: 7154

Re: GWR 1366PT - Heljan Model

I'm converting a Heljan 07 diesel dock shunter at the moment. I expect this has a similar chassis to the 1366. The 07 has 3'6" wheels so I'm grinding the Heljan wheels down to 13mm diameter which allows me to press on Gibson coach wheel tyres. So far, so good!
by Simon_S
Thu Dec 27, 2018 3:38 pm
Forum: Tools and Techniques
Topic: UV cure adhesives
Replies: 0
Views: 855

UV cure adhesives

My dentist now uses UV cure fillings which seem a much simpler process than the previous two-part epoxy ones so I thought I'd see if there was something similar publicly available. The most popular product seems to be '5 second fix', readily available on Amazon and eBay for less than £3. It comes as...
by Simon_S
Fri Aug 24, 2018 12:02 pm
Forum: John Donnelly
Topic: Structures for South Pelaw Junction
Replies: 33
Views: 10049

Re: Structures for South Pelaw Junction

I'm not sure, I just happened to come across this article on riveted structures that mentions the hole clearance in the 20 August comment by 'p'. Perhaps a rivet can achieve a higher tension than a bolt. After all, you don't see many bolted together ship's hulls or boilers. Coincidentally, I am in a...
by Simon_S
Thu Aug 23, 2018 12:50 pm
Forum: John Donnelly
Topic: Structures for South Pelaw Junction
Replies: 33
Views: 10049

Re: Structures for South Pelaw Junction

There should be clearance between the rivet and the hole after the rivet head has been formed. The rivet's job is to create friction between the parts being joined by pulling them together, not to align or reinforce the joint.
by Simon_S
Fri Aug 03, 2018 8:40 am
Forum: DCC
Topic: Intermittent running, Hornby J15 on Gaugemaster Prodigy EXpress
Replies: 8
Views: 5869

Re: Intermittent running, Hornby J15 on Gaugemaster Prodigy EXpress

Intermittent running sounds more like a pick-up problem than a DCC chip issue to me. My first step would be to check for obvious faults, then replace the chip with the blanking plug and make sure it ran properly on DC. It may be as simple as the loco needing a long run to bed in bearings etc. Where ...
by Simon_S
Mon Jul 16, 2018 9:39 am
Forum: Steam Locomotives
Topic: Dapol LSWR B4 0-4-0T
Replies: 23
Views: 7051

Re: Dapol LSWR B4 0-4-0T

This post has links to changing the tyres on Heljan loco wheels and might provide some pointers for the Dapol conversion. I need to do something similar for the Heljan 07 shunter so will be interested in how you get on too.
by Simon_S
Wed May 16, 2018 8:21 am
Forum: Tools and Techniques
Topic: How not to break a 16BA Tap?
Replies: 24
Views: 6234

Re: How not to break a 16BA Tap?

Can you drill a recess then solder a nut inside?
by Simon_S
Tue May 08, 2018 10:19 am
Forum: Electrics
Topic: Pentroller repairs
Replies: 50
Views: 14469

Re: Pentroller repairs

I expect the burnt resistor acts as a current sensor and provides an input to the control circuit, needs replacing with a higher wattage rated part as suggested.
by Simon_S
Tue Apr 10, 2018 8:26 am
Forum: Electrics
Topic: Pentroller repairs
Replies: 50
Views: 14469

Re: Pentroller repairs

Could it be the same as the one next to the switch on your working controller? Mind you, that one looks 'thermally challenged' too...
by Simon_S
Wed Jan 10, 2018 3:46 pm
Forum: Diesel and Electric Locomotives
Topic: Dapol Class 68 conversion
Replies: 6
Views: 2406

Re: Dapol Class 68 conversion

Hi Tony,

I've had success using a 2mm ID, 2.5mm OD sleeve for the gear loctited to a 2mm axle, saves altering the bearings.

Simon

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