Search found 101 matches

by Dave Holt
Thu Sep 19, 2019 11:01 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 287
Views: 39332

Re: Crab Comet conversion

Julian. I've just compared my Comet Crab valvegear against the drawing in the Wild Swan profile book. The length of the bottom section of the combination lever, from valve spindle to the anchor link is pretty close, even with a slight joggle - 2' 8 1/2" vs about 11 mm . However, the cross head ...
by Dave Holt
Wed Sep 18, 2019 12:00 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 287
Views: 39332

Re: Crab Comet conversion

Hi Julian. At a guess, I'd say the return crank on your Crab looks about right. Just over 2 mm in advance of the axle at bottom dead centre would be spot on. I agree with you that an impression of reasonable valve gear movement is more important than the exact amount of travel and I generally aim fo...
by Dave Holt
Tue Sep 17, 2019 5:43 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 287
Views: 39332

Re: Crab Comet conversion

Julian. I'm not sure what the relevance is of the eccentric rod being parallel to the connecting rod? The outer end of the return crank should be approximately at right angles to the wheel boss crank, allowing for any difference in slope of the cylinder and the eccentric rod at mid swing. On the Cra...
by Dave Holt
Mon Sep 16, 2019 7:37 pm
Forum: Layouts and Operations
Topic: Bristol Barrow Road
Replies: 96
Views: 10853

Re: Bristol Barrow Road

I'm sure David will be very pleased. It looks to run smoothly and reliably - better, in fact, than my carefully hand crafted Brassmasters version. Sickening, isn't it?
Dave.
by Dave Holt
Tue Sep 10, 2019 7:42 pm
Forum: Steam Locomotives
Topic: Some North Eastern & LNER Locomotive Builds
Replies: 162
Views: 18843

Re: Some North Eastern & LNER Locomotive Builds

Mike, Looks to be a well produced kit and turning into a very nice build. With regard to glass fibre brushes, how do you avoid getting the bristle splinters in your fingers? Whenever I use one, I'm afflicted with painful slinters for days after, even though I try to sweep them off the work tray stra...
by Dave Holt
Sun Sep 08, 2019 9:10 pm
Forum: Steam Locomotives
Topic: Brassmasters Blk5 45284
Replies: 6
Views: 662

Re: Brassmasters Blk5 45284

Generally speaking, I do a lot of planning and scheming to work out when and how to fit various components during loco construction. For parts provided in the kit, I find the instructions are usually a pretty good guide although some deviations might seem appropriate here and there. For additional d...
by Dave Holt
Mon Sep 02, 2019 9:04 pm
Forum: Steam Locomotives
Topic: Brassmasters Blk5 45284
Replies: 6
Views: 662

Re: Brassmasters Blk5 45284

Phew! Very near to a complete disaster today but I think I've just about got away with it. Spent some time finishing off the brake gear by fitting the cross beams, pull rods and crank and securing the brake hangers, which had been left loose in their mountings to the frames. All appeared to have gon...
by Dave Holt
Sat Aug 31, 2019 8:46 pm
Forum: Steam Locomotives
Topic: Brassmasters Blk5 45284
Replies: 6
Views: 662

Re: Brassmasters Blk5 45284

Dave, I hadn't really given any thought at all to the question of diameters of different batches, just assumed all the tyres are machined to the same tolerance, whatever the batch. I'm not familiar with the production process, but can one assume that tyres and moulded centres are made in batches tog...
by Dave Holt
Fri Aug 30, 2019 7:35 pm
Forum: Steam Locomotives
Topic: Brassmasters Blk5 45284
Replies: 6
Views: 662

Brassmasters Blk5 45284

I've put the Ivatt Class 2 tank to one side whilst I figure out how best to deal with the Bachmann body - the question being whether to do major surgery to replace the boiler with a spare DJH cast white metal unit or stick with the moulded plastic version. Suggestions on a post card...... Instead, I...
by Dave Holt
Tue Aug 27, 2019 7:05 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 287
Views: 39332

Re: Crab Comet conversion

Julian.
Yes, sorry to read of your problems. It's so frustrating when a finished model gets damaged or malfunctions like that. It sound as if you have a solution, even if it involves a fair bit of re-work.
Best wishes for a successful repair.
Dave.

PS. Sooo envious of your visit to Chris;s layout.
by Dave Holt
Fri Aug 23, 2019 7:03 pm
Forum: Steam Locomotives
Topic: 9F re-visited
Replies: 12
Views: 1370

Re: 9F re-visited

Please all feel free to carry on any vaguely relevant discussions. My use of the Ultrascale recessed type crank pin bush resulted from a need to have longer thread engagement on the crank pin screw than that provided just by tapping the return crank material. My method is to thin the outer flange of...
by Dave Holt
Mon Aug 19, 2019 1:46 pm
Forum: Steam Locomotives
Topic: 9F re-visited
Replies: 12
Views: 1370

9F re-visited

My BR 9F, built from a Model Loco kit with Gibson milled frames and coupling rods (correct axle spacing), was never my best runner, in terms of slow running due to excess slop in the horn guides and axleboxes, but was OK at line speed until it suffered a major mishap whilst running round Dewsbury at...
by Dave Holt
Mon Aug 12, 2019 12:40 pm
Forum: Other Buildings and Scenery
Topic: Alpha Mill
Replies: 146
Views: 23283

Re: Alpha Mill

Ralph.
Congratulations. The representation of the engine looks very nice and, glimpsed through the engine house windows, creates just the right effect.
Looking forward to seeing the whole thing in the flesh at Scaleforum.
Dave.
by Dave Holt
Thu Aug 01, 2019 10:46 am
Forum: Layouts and Operations
Topic: Bristol Barrow Road
Replies: 96
Views: 10853

Re: Bristol Barrow Road

Robin.
All looking very impressive - and realistic. I especially like the internal shots. It just needs a 100 years of soot and grime (and a turntable deck), but I'm sure you've got that all planned.
How is the fiddle yard and wiring coming along?
Dave.
by Dave Holt
Mon Jun 17, 2019 7:12 pm
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Re: Ivatt Class 2 2-6-2 tank

Mike,
They're filed down brass lace makers pins. Just held in a pin-chuck and rotated over a file to reduce the diameter and then thinned down.
Dave.
by Dave Holt
Sun Jun 16, 2019 8:39 pm
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Re: Ivatt Class 2 2-6-2 tank

After a period of reluctance to actually do anything, I've finally roused myself to make and fit the cylinder drain cocks and operating mechanism to the cylinder/valve gear unit. To be honest, my efforts probably fall into the "artistic impression" category, rather than a scale reproductio...
by Dave Holt
Thu Jun 13, 2019 8:24 pm
Forum: Layouts and Operations
Topic: Brimsdown-The last grand project.
Replies: 287
Views: 40137

Re: Brimsdown-The last grand project.

All very impressive, Tony. As a matter of interest, how many tie bars/stretchers does a set of E switches have and how many functional ones do you intend to fit?
Dave.
by Dave Holt
Wed May 15, 2019 9:57 am
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Re: Ivatt Class 2 2-6-2 tank

As Philip says, the body moulding is rather old (and not much improved on the latest version, as I understand) and is definitely not up to current RTR standards. Interestingly, on another web site, Larry Goddard made one of these tanks by replacing the boiler unit (not sure if it included the front ...
by Dave Holt
Mon May 13, 2019 7:42 pm
Forum: Chassis and Suspensions
Topic: Chassis Speed Building - Records and Methods
Replies: 17
Views: 1330

Re: Chassis Speed Building - Records and Methods

Mmm... Definitely not the quickest - the Ivatt 2 tank chassis I've almost finished was started in 1995! Perhaps the slowest build ever? Actually, I had it running years ago, so not the whole 24 years to reach the stage Knuckles specified. Since I model purely as a hobby, speed is not a consideration...
by Dave Holt
Mon May 13, 2019 7:29 pm
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Re: Ivatt Class 2 2-6-2 tank

Julian. Sorry if I've caused any confusion by using different terminology but the method of springing is exactly the same as the Crab, or rather the Crab is the same as this, as this was the first loco to use the diagonal hair pin springs (also recommended by Brassmasters for their Ivatt truck etch)...
by Dave Holt
Sun May 12, 2019 2:22 pm
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Re: Ivatt Class 2 2-6-2 tank

The chassis is almost complete, now. Just the cylinder drain cocks to represent. Needless to say, rather like the injectors, I cannot find any suitable commercial product for these. Brassmasters do a very neat cast brass LMS drain cock casting, but unfortunately they have a different operating arran...
by Dave Holt
Thu May 09, 2019 2:57 pm
Forum: Other Buildings and Scenery
Topic: Alpha Mill
Replies: 146
Views: 23283

Re: Alpha Mill

[quote="ralphrobertson"]Howard Bolton and Dave Holt have already provided details about the engines and Howard has provided his 3D animation shown earlier in this thread for us to produce the engine - if we can. Many thanks gentlemen for your help on this. One of our members, Chris Morgan,...
by Dave Holt
Sat May 04, 2019 8:39 am
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Re: Ivatt Class 2 2-6-2 tank

Hi Andrew. The coal bunker is off at present. It's a separate moulding and hadn't been well aligned at the factory on my model. Luckily, I managed to prise it off without damage, to be re-fitted later. I wouldn't worry about the injectors. To be honest, from a couple of feet away, you can't really m...
by Dave Holt
Fri May 03, 2019 7:44 pm
Forum: Steam Locomotives
Topic: Ivatt Class 2 2-6-2 tank
Replies: 18
Views: 1974

Ivatt Class 2 2-6-2 tank

Having completed the BR Standard 2 tank recently. my attentions have turned to finishing the Ivatt version, which I actually started before the Standard. For some years it has remained as a running loco but devoid of the finer details but I have now made some progress towards completion. The model c...
by Dave Holt
Thu Apr 18, 2019 2:16 pm
Forum: Jeremy Suter
Topic: Turning a chimney
Replies: 19
Views: 1948

Re: Turning a chimney

Presumably, one could use the ball cutter to remove the bulk of the material and then use a smaller cutter, file, or burr to create the smaller radius and blend in to the larger? Still looks a lot easier than trying to do it all by hand.
Dave.

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