Search found 718 matches

by Julian Roberts
Wed Sep 18, 2019 8:38 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

Thanks both Daves you've answered my questions enough for me! Something I asked earlier in this thread was whether a straight line from the valve spindle in the cylinder should meet the pivot of the expansion link. If so the kit didn't really do that. The pivot was a bit high. I laboured quite a lot...
by Julian Roberts
Tue Sep 17, 2019 8:31 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

Dave many thanks. I would have to ask an awful lot of questions to properly understand that...but I think or hope the way I had it set already was good enough really...? As far as I know the crank is the right length and the wheel crank throw is also correct. This shows the parallel situation of ecc...
by Julian Roberts
Tue Sep 17, 2019 11:00 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

I could well award that an ok.... DaveB Well I'll take that as high praise indeed Dave, coming from you! Yes and thank you for pointing out the issues. Of course the loco has already run successfully. The shims I thought acted as the missing bush flange between wheel boss and rod and I thought any ...
by Julian Roberts
Sat Sep 14, 2019 6:19 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

I've thanked Allan for his post above. I might start a new thread on that subject. Friday 13th gave me some time to bite the bullet with the possibly wrecked return crank. I was fearing I would have to make another one. To my surprise, application of the soldering iron to the remains of the crankpin...
by Julian Roberts
Sun Sep 08, 2019 7:00 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

Belt and braces I think Tim! Thanks, yes I have thought the same as you but I think time does things. These wheels seemed less difficult to remove from the axle than I expected and I have wondered if on some older locos (say eight years or so) things move. Talking about Gibson wheels by the way. But...
by Julian Roberts
Sun Sep 08, 2019 5:22 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

Having eventually a suitably calm mentality and spare two hours I've successfully removed and disassembled the Crab middle axle. I was surprised how easily the wheels came off the axle which I thought I'd attached securely with 24 hr Araldite and a cross-pin. (Page 4, 15th Dec '17) So in advance of ...
by Julian Roberts
Sun Sep 08, 2019 5:01 pm
Forum: Electrics
Topic: Can I drive a Seep motor from a lever frame?
Replies: 8
Views: 469

Re: Can I drive a Seep motor from a lever frame?

Very many thanks both Martins.
by Julian Roberts
Sun Sep 08, 2019 7:00 am
Forum: Electrics
Topic: Can I drive a Seep motor from a lever frame?
Replies: 8
Views: 469

Re: Can I drive a Seep motor from a lever frame?

I'm very grateful for your replies, particularly Martin for your very detailed one. I must confess I'm really asking on behalf of someone else, and although this is all quite simple I'm sure I have not personally made a layout since a 00 one 20 years ago, where I had a single Capacitor Discharge Uni...
by Julian Roberts
Sat Sep 07, 2019 1:54 pm
Forum: Electrics
Topic: Can I drive a Seep motor from a lever frame?
Replies: 8
Views: 469

Can I drive a Seep motor from a lever frame?

A probably very basic question. With a Seep or Peco or similar design point motor, only a momentary pulse of power is needed to throw the point. An "electric pencil" is a convenient way to apply this pulse of power, where one just touches the "pencil" to a stud to briefly make th...
by Julian Roberts
Thu Sep 05, 2019 7:09 pm
Forum: Track and Turnouts
Topic: Joggled Stockrails
Replies: 65
Views: 5873

Re: Joggled Stockrails

Somewhat delayed by a busy summer the half point (switch and closure rails section of A6 turnout) for Calderside is now ready for installation. 20190826_124646.jpg I regauged the diverging stockrail to be +0.1 at sleeper 2, and +0.2 at the stockgauge. 20190826_125014.jpg From there on to the rail jo...
by Julian Roberts
Wed Aug 28, 2019 1:51 pm
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

20190827_093735.jpg Allan and both Daves, thanks for your thoughts! I was going to say, and Dave B you have beaten me to it by asking, yes the Gibson crankpins were Araldited (24hr stuff) in place. They're absolutely immovable, that stuff really works. Not quite sure whether to continue the convers...
by Julian Roberts
Tue Aug 27, 2019 10:14 am
Forum: Steam Locomotives
Topic: 9F re-visited
Replies: 12
Views: 1366

Re: 9F re-visited

Thanks Dave for your comprehensive explanation, and also to Richard. I've just had my own return crank disaster but instead of hijacking your thread any further I've posted on the Crab thread. Absolutely inspirational 9F Dave I omitted to say in my early morning first post.
by Julian Roberts
Tue Aug 27, 2019 10:09 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

Yesterday I started the process of properly fixing the RHS return crank for small scale exhibition next week. Main thing was getting the correct amount of shims to bring the crank to the correct height/orientation when fully screwed down. And, to get rid of all the oil that was going to prevent a th...
by Julian Roberts
Mon Aug 26, 2019 10:55 am
Forum: On My Workbench
Topic: Wemyss Private Railway - Scott's Road - Allan Goodwillie
Replies: 167
Views: 23808

Re: Wemyss Private Railway - Scott's Road - Allan Goodwillie

Great to see and read of progress happening Allan. I'm looking forward to the subtleties of colour of autumn you were talking about earlier. May I venture to suggest that sort of thing - the overall impression that's so much to do with the way it's painted, so that is, your artistry! - is at least a...
by Julian Roberts
Fri Aug 23, 2019 1:17 pm
Forum: Steam Locomotives
Topic: 9F re-visited
Replies: 12
Views: 1366

Re: 9F re-visited

Hi Pete and Dave Pete I haven't used the Ultrascale recessed crankpin thingy as its 14BA thread was incompatible with the Gibson crankpin 1M thread. So I can't say from experience how it should be used and don't want to misrepresent how Dave thought it should. I fear I am causing confusion and may b...
by Julian Roberts
Fri Aug 23, 2019 9:01 am
Forum: Steam Locomotives
Topic: 9F re-visited
Replies: 12
Views: 1366

Re: 9F re-visited

Hi Pete

This is what I got for future builds. So I haven't used it for a return crank yet. Obviously it's meant to be for leading wheels but Dave kindly suggested it for a return crank on my Crab thread.

https://www.ultrascale.uk/eshop/product ... CAT020/467
by Julian Roberts
Thu Aug 22, 2019 4:08 am
Forum: Steam Locomotives
Topic: 9F re-visited
Replies: 12
Views: 1366

Re: 9F re-visited

Yes as Ian just said, thanks for sharing Dave. I've been revisiting MRJ 28 & 29 for Chris Pendlenton's Hal O The Wynd articles. He mentions using steel crankpins and homemade steel threaded return crank whereby he can screw it down with enough torque for it to never come unscrewed, without need ...
by Julian Roberts
Fri Aug 16, 2019 2:26 pm
Forum: Chassis and Suspensions
Topic: Chassis kits for CSB
Replies: 37
Views: 2480

Re: Chassis kits for CSB

Bob what I didn't want to provoke was another of those useless arguments that people can waste their time with on this Forum, by saying anything more ill-considered or that could be construed in the wrong way. What I meant by putting up that Ted Talk was in a way addressed to myself, as well as for ...
by Julian Roberts
Mon Aug 12, 2019 4:21 am
Forum: Chassis and Suspensions
Topic: Chassis kits for CSB
Replies: 37
Views: 2480

Re: Chassis kits for CSB

I completely see that Dave. I hadn't clicked Bob who you were and that we met each other recently. I hope Kings Cross is nearer having a new home? I think to reconvene the party with Dave too at the Queens Arms for another delicious pint is called for sometime! Meanwhile here is a quite inspirationa...
by Julian Roberts
Sun Aug 11, 2019 4:46 am
Forum: Chassis and Suspensions
Topic: Chassis kits for CSB
Replies: 37
Views: 2480

Re: Chassis kits for CSB

Hi Jol, Chris, Bob - I posted the question partly as a way of answering the OP Jol. I didn't expect you Chris to answer but thanks for the good news! Bob I'm grateful for your suggestions. In fact I intend to try CSB with this chassis as it's designed in with no compensation option. Everything I've ...
by Julian Roberts
Fri Aug 09, 2019 8:04 pm
Forum: Chassis and Suspensions
Topic: Chassis kits for CSB
Replies: 37
Views: 2480

Re: Chassis kits for CSB

Does anyone know how development for the High Level chassis kit for a J50 is coming on? Apparently it is going to be CSB only.
by Julian Roberts
Sat Jul 27, 2019 3:33 am
Forum: Steam Locomotives
Topic: Crab Comet conversion
Replies: 282
Views: 38925

Re: Crab Comet conversion

To more or less wrap up this thread here is a video of the Crab stretching its legs at a certain iconic location that some may recognize. 7 coaches were handled with no slipping on the 1:100 gradient. I wasn't running at max speed just in case of any mishap (which did not occur) while I was distant ...
by Julian Roberts
Wed Jul 17, 2019 5:13 pm
Forum: Guest Book
Topic: N7 Chassis Question
Replies: 20
Views: 1573

Re: N7 Chassis Question

Without meaning to contradict the sound advice given above WT07OjFIKic SWB wagons, 16 ton and 21 ton types, even with fixed buffers, go perfectly well round 2' reverse curves pulled and propelled at the separation distance of AJ couplings mounted in the standard way. Some other videos there show a l...
by Julian Roberts
Sun Jul 14, 2019 4:43 am
Forum: Guest Book
Topic: N7 Chassis Question
Replies: 20
Views: 1573

Re: N7 Chassis Question

Just to corroborate Philip's reply really but with my own perspective. I don't take anything on trust after my first P4 loco wouldn't go round a 4' bend having used P4 spacers. I work out the sideplay required for that radius with the versine, and the EM spacers are normally what I use now. ( For a ...
by Julian Roberts
Tue Jul 09, 2019 6:54 am
Forum: Chassis and Suspensions
Topic: Methods for Removable Loco Wheelsets.
Replies: 40
Views: 2733

Re: Methods for Removable Loco Wheelsets.

Third - and this was a major consideration – on small chassis, where the frames are not deep, sometimes no more than a few millimetres of material above the cut-outs, the lack of any bracing at the underside would seriously compromise strength. Compare a chassis to a saloon car turned upside down –...

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