Search found 627 matches

by David Thorpe
Mon Jul 19, 2010 6:39 am
Forum: Chassis and Suspensions
Topic: Loco Suspension, fitting CSBs
Replies: 152
Views: 81957

Re: Loco Suspension, fitting CSBs

Thanks, Will - just what I've been looking for. I'm really looking forward to this.

DT
by David Thorpe
Sun Jul 18, 2010 8:26 am
Forum: Track and Turnouts
Topic: Using thick and thin sleepers, togetherish
Replies: 13
Views: 3651

Re: Using thick and thin sleepers, togetherish

Is it reasonably easy to colour match ply and plastic? I've always found that stained ply looks like, well, wood, but that it's very hard to achieve a matching effect with plastic.

DT
by David Thorpe
Sat Jul 10, 2010 2:25 pm
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Re: Problem with Gibson sprung suspension

I'm afraid that Russ's maths are beyond me, so instead I chickened out and merely snipped about a third off each of the springs. Ride height and performance on the test track is now fine although how the loco performs on a real layout remains to be seen.

David
by David Thorpe
Sun Jul 04, 2010 11:04 pm
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Re: Problem with Gibson sprung suspension

Ok, we might be in with a chance. If you can make a small 'open trap' on top of the blocks, the following twin springy equaliser (one on each side of the chassis) is a bit of a bodge for your situation, but might be a way forward. I don't know what weight you can get on top of your drivers, but the...
by David Thorpe
Sun Jul 04, 2010 6:28 pm
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Re: Problem with Gibson sprung suspension

Russ Elliott wrote:David - do you have 1mm clearance between the top of the hornblock and the hornguide?
I can't measure it precisely, but it's about 1mm, possibly slightly more.

David.
by David Thorpe
Sun Jul 04, 2010 5:33 pm
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Re: Problem with Gibson sprung suspension

Thanks Tim, but that would involve cardan shafts, universal joints and other complications which, whatever the advantages, are currently beyond me! :D

David
by David Thorpe
Sun Jul 04, 2010 4:52 pm
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Re: Problem with Gibson sprung suspension

In my book the right answer would be CSBs (Continuous Springy Beams) rather than individual springs, as it is practical, even easy, to change the springs and adjust the ride hight. I did consider that when I started on the chassis. I didn't do it for two reasons; first, I'd never tried CSBs before ...
by David Thorpe
Sun Jul 04, 2010 12:00 pm
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Re: Problem with Gibson sprung suspension

Thanks Keith, that's a very decent offer. Before I put you to the trouble of trying to find the springs, however, I thought I might remove the existing springs,snip, say, a third off them (the amount will probably be a matter of trial and error), stretch the remaining two-thirds until the length is ...
by David Thorpe
Sun Jul 04, 2010 8:28 am
Forum: Chassis and Suspensions
Topic: Problem with Gibson sprung suspension
Replies: 18
Views: 5625

Problem with Gibson sprung suspension

I'm building a Gibson E4 kit and have constructed the chassis as per the the kit, using the supplied Gibson suspension system of spring hornblocks. I'm very happy with the chassis, which runs beautifully. What is causing me great problems, however, is setting an accurate ride height. As I understand...
by David Thorpe
Thu May 06, 2010 12:27 pm
Forum: Tools and Techniques
Topic: Advice on Chassis jigs
Replies: 8
Views: 5212

Re: Advice on Chassis jigs

I invested in an Avonside chassis jig last year. Using that together with a GW Models Wheel Press & Quartering Jig, not to mention a High Level gearbox, I managed to produce for the first time a loco that ran sweetly from the start without the need of any tweaking whatever. Highly recommended. DT
by David Thorpe
Sat Feb 27, 2010 10:38 am
Forum: Starting in P4
Topic: Ultrascale Brass Wheels
Replies: 23
Views: 7425

Re: Ultrascale Brass Wheels

Anymore brass stories out there, or do Ultrascale advertise them as some sort of 'in-house' joke? When I was at the Glasgow model railway show this weekend I spoke to the operator of an EM gauge layout who told me that all his locos (diesel) and rolling stock are fitted with brass wheels (albeit no...
by David Thorpe
Tue Feb 16, 2010 10:38 pm
Forum: Recommendations
Topic: Aldi 160W combi drill
Replies: 0
Views: 2764

Aldi 160W combi drill

For a limited time from 18th February Aldi will be selling a miniature combi drill unit with flexible extension shaft. (http://www.aldi.co.uk/uk/html/offers/2827_13039.htm?WT.mc_id=2010-02-16-11-28) At £12.99 it isn't a bad buy (and nor, at £8.99, is the digital caliper they currently have in stock ...
by David Thorpe
Sun Feb 14, 2010 10:21 pm
Forum: Starting in P4
Topic: West of Scotland Group's "Starters" Build a loco project
Replies: 151
Views: 63154

Re: West of Scotland Group's "Starters" Build a loco project

Tool List buy a caliper gauge, you get very nice digital ones out of places like Liddle at a very reasonable price, once you have one it will surprise you how often you will use it. For anyone who is interested in one of these, Aldi (at least here in Scotland) currently have digital calipers at £8....
by David Thorpe
Sun Feb 14, 2010 10:21 pm
Forum: Steam Locomotives
Topic: West of Scotland Group's "Starters" Build a loco project
Replies: 145
Views: 36118

Re: West of Scotland Group's "Starters" Build a loco project

Tool List buy a caliper gauge, you get very nice digital ones out of places like Liddle at a very reasonable price, once you have one it will surprise you how often you will use it. For anyone who is interested in one of these, Aldi (at least here in Scotland) currently have digital calipers at £8....
by David Thorpe
Sun Jan 24, 2010 12:50 pm
Forum: Guest Book
Topic: EM wheels on P4 track
Replies: 82
Views: 51296

Re: EM wheels on P4 track

The difficulty with your case, Rodney, is that whatever the arithmetic calculations may point to, actual practice seems to produce a different result. You suggest that the use of EM wheels will cause problems. But Martin (Goodall) was specifically asked at one point: "Are you claiming that by u...
by David Thorpe
Sun Jan 24, 2010 11:20 am
Forum: Guest Book
Topic: EM wheels on P4 track
Replies: 82
Views: 51296

Re: EM wheels on P4 track

That's all very well, but Martin Goodall assures us that his track is built to P4 standards: "First, my track is built to P4 standards. Flangeway and check rail clearances are all within P4 tolerances; they have not been adjusted in any way to accommodate the EM-profile wheels". As far as ...
by David Thorpe
Fri Jan 22, 2010 6:44 pm
Forum: Wagons
Topic: Wagon Suspension
Replies: 68
Views: 14675

Re: Wagon Suspension

A little off topic ("Wagon" suspension), but I assume that while rolling stock with EM profile wheels runs on P4 track, the same cannot be said of locos?

David
by David Thorpe
Tue Jan 19, 2010 12:10 am
Forum: Wagons
Topic: Wagon Suspension
Replies: 68
Views: 14675

Re: Wagon Suspension

I dont see why it should IF as Martin states that he isnt using P4 standards. Which he isn't and indeed hasn't claimed he is here. He is just using EM standards set to a wider gauge. As some P4 modellers model Irish gauge its not the gap between the wheels that defines the standard but the wheels a...
by David Thorpe
Wed Jan 13, 2010 2:31 pm
Forum: Chassis and Suspensions
Topic: Split frames
Replies: 37
Views: 8703

Re: Split frames

Thanks for that, Tim. John's method seems eminently logical and sensible, and I shall equip myself with some Brassmaster hornblocks and give it a go. Obviously it can't be combined with Mark's split axle method, so I assume that you just split your chassis frames in the usual way and insulate them f...
by David Thorpe
Wed Jan 13, 2010 12:08 am
Forum: Starting in P4
Topic: West of Scotland Group's "Starters" Build a loco project
Replies: 151
Views: 63154

Re: West of Scotland Group's "Starters" Build a loco project

I'm enjoying this thread very much indeed and (I hope Alan doesn't mind) am printing it out so that i can read it while not at the computer. I wish i could manage two decent running chassis in 10 days - it's taken me all evening struggling with some Gibson sprung hornblocks (I know, I know, but they...
by David Thorpe
Wed Jan 13, 2010 12:08 am
Forum: Steam Locomotives
Topic: West of Scotland Group's "Starters" Build a loco project
Replies: 145
Views: 36118

Re: West of Scotland Group's "Starters" Build a loco project

I'm enjoying this thread very much indeed and (I hope Alan doesn't mind) am printing it out so that i can read it while not at the computer. I wish i could manage two decent running chassis in 10 days - it's taken me all evening struggling with some Gibson sprung hornblocks (I know, I know, but they...
by David Thorpe
Mon Jan 11, 2010 8:25 am
Forum: Chassis and Suspensions
Topic: Split frames
Replies: 37
Views: 8703

Re: Split frames

I have used the John Brighton system of Brassmasters hornblocks over several locos, amended for split frames, with complete satisfaction. Using his methods I can build a working chassis first time and very quickly. I'm afraid I don't know about the John Brighton system, and I haven't used the Brass...
by David Thorpe
Sun Jan 10, 2010 1:42 pm
Forum: Chassis and Suspensions
Topic: Split frames
Replies: 37
Views: 8703

Re: Split frames

LesGros wrote:If the frame is live, then insulation must be required to prevent inadvertant shorts through Loco bodies, buffer beams and metal couplings.
If you use the method I have described above, the frames will not be live and insulation will not be required.

David
by David Thorpe
Sun Jan 10, 2010 12:23 am
Forum: Chassis and Suspensions
Topic: Split frames
Replies: 37
Views: 8703

Re: Split frames

I'm not sure what you mean by "the additional bits around the hornguides". If you use Mark Humphry's method, you first solder a piece of thin PCB on the inside of the frame over the area where the hornblock cut-out is going to be. You then cut out your hornblock slot, ie cutting through bo...
by David Thorpe
Sat Jan 09, 2010 3:48 pm
Forum: Chassis and Suspensions
Topic: Split frames
Replies: 37
Views: 8703

Re: Split frames

wouldn't it be easier to use the plastic Exactoscale hornblocks? Alan I'm afraid that I've never seen or used the Exactoscale hornblocks, so I don't know. The PCB method, however, presents no great difficulty and so I doubt if the Exactoscale hornblocks would be any easier - I've looked at the inst...

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