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Post by Deleted on Mar 11, 2013 21:49:31 GMT
----------- given the current situation I thought that one photo alongside The Flying Scotsman should be enough to for you to choose 3mm as mainframes ??- ---------- OK, OK, lads... that's just a light-hearted observation.... Keep your grease-tops on !!
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jma1009
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Post by jma1009 on Mar 11, 2013 23:51:40 GMT
hi superseven,
you have supplied the solution which i wasnt aware of from the sketchy drawings i have... and also hopefully provides the solution to the frame thickness dilemma allowing 3mm steel to be used for the frames as standard. what a wonderful forum this is for sharing ideas!
my own preference, peter, would be for you to do a set of drawings for a scale 57XX 'tankie', plus a detailed set of drawings for CITY OF TRURO in 5"g.
if you did CITY OF TRURO, i'd buy a set of your drawings plus the castings and start work immediately! the keith wilson ex- kennion drawings are positively awful!
cheers, julian
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taff
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Post by taff on Mar 12, 2013 0:01:16 GMT
Hello superseven and all, 11.38pm. Many thanks for bringing this site to my attention, excellent photo's of 1363 and I am particularly pleased with the photo of its boiler. Your comment about enlarging the barrel is exactly what I was thinking and I'll put my design on the site before long. I am thinking of setting the barrel at 4-3/8" dia if its still available but I'll inquire around first. I've done a rough outline which I'll try to show tomorrow. 4930hagley. many thanks I've put a bid in but please all, still keep them coming, I need more than one.
Taff.
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jma1009
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Post by jma1009 on Mar 12, 2013 11:08:22 GMT
hi peter, if the fullsize barrel is 3' 9" (and 1/8"), then surely 4" tube would be appropriate for the barrel? 4 3/8" tube (even if still available) would be overscale? cheers, julian
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taff
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Post by taff on Mar 12, 2013 11:25:07 GMT
Hello Julien, Agreed, but who is going to know, I won't tell anyone.
Taff
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Post by Deleted on Mar 12, 2013 11:59:24 GMT
hi superseven, you have supplied the solution which i wasnt aware of from the sketchy drawings i have... and also hopefully provides the solution to the frame thickness dilemma allowing 3mm steel to be used for the frames as standard. what a wonderful forum this is for sharing ideas! my own preference, peter, would be for you to do a set of drawings for a scale 57XX 'tankie', plus a detailed set of drawings for CITY OF TRURO in 5"g. if you did CITY OF TRURO, i'd buy a set of your drawings plus the castings and start work immediately! the keith wilson ex- kennion drawings are positively awful! cheers, julian ------------------------Hello JULIAN, }---- and, just for fun, why not re-locate to a "certain place" in YORK and build your City of Truro there ??--- salt, wounds etc ??----- Probally get it done before they would as well ?? ;D ;D
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RLWP
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Post by RLWP on Mar 12, 2013 12:35:11 GMT
------------------------Hello JULIAN, }---- and, just for fun, why not re-locate to a "certain place" in YORK and build your City of Truro there ??--- salt, wounds etc ??----- Probally get it done before they would as well ?? ;D ;D He would have to, they've lost all those skills in Swindon now Richard
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taff
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Post by taff on Mar 12, 2013 17:59:53 GMT
Hello all, Oh no they haven't, Richard !, all the skills are still there within the population but the means to practice them have been removed. Model Engineers are the proof of that.
Taff
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Post by Deleted on Mar 12, 2013 21:06:46 GMT
Hello chaps------- difficult to build anything in a shopping centre these days.. ;D ;D-- apart from a reputation that is !!--------- TAFF, I agree entirely...if the "skills" themselves had gone then the preservation movement per se and other similar set-ups' wouldn't exist...it's the engineering infrastructure that's been ripped-out in a hurry to be "modern".. De ja Vu ??
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taff
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Post by taff on Mar 13, 2013 0:53:44 GMT
Hello all, 00.32am. Julian, I designed and built both "City of Truro"and 3312 "Bulldog" many years ago. You may have seen them at the London Exhibition. Nobody seemed to be interested in my drawings of them so I slung them. I've had a look again at the boiler for 1361 and reckon I could go up to 4-1/2" dia without impinging on the saddle tank, but I'll study all aspects and opinions before finalising anything. One problem I can foresee is the clearance between the top of the inner firebox and the underside of the outer wrapper. Standard dimension for GW belpaire boilers in 5" gauge is 2-1/8" but this seems to me to push the tubes too far downwards. Your observations please folks. Also tubes will come out at about 9" long so guidance re fire tube dia would be welcome. Bedtime now.
Taff,
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taff
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Post by taff on Mar 15, 2013 10:47:57 GMT
Hello all, Just a few words. 4930, many thanks about the "Drop compass", my offer was accepted and I've paid for it now. Having said that I am still in the market for a "drop compass" which carry's a technical pen, they must be out there somewhere.
Taff.
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RLWP
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Post by RLWP on Mar 15, 2013 13:24:53 GMT
A compass like that would be half an hour's work in the workshop for a man of your calibre, surely?
Richard
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Post by Deleted on Mar 15, 2013 15:00:51 GMT
A compass like that would be half an hour's work in the workshop for a man of your calibre, surely? Richard ------------ not if he can't draw it first ?? Catch 22 ?? ;D ;D
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RLWP
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Post by RLWP on Mar 15, 2013 15:09:07 GMT
That won't stop him, just draw it out at ten times scale and use ordinary compasses
Richard
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taff
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Post by taff on Mar 16, 2013 12:30:51 GMT
Hello Richard and all, I note all of the comments but as for ten times full size I agree but it is a question of space, I cannot get a 20ft long drawing board in my drawing office !. Ha Ha. I also agree with you 4930hagley, but that is alright if I could actually get into the workshop now. Its strange because for years I have been using a pen holding compass but the loss of it has caused me to return to the old type of ink carrier as in the one at the one on Amazon. I had forgotten how good they were and far superior to the ink pen type so much so that I think I'll return to them permanently. Progress backwards is not such a bad thing is, it !. Still drawing, but nothing from you all about tube sizes yet. I've tried set outs at 3/8" and 7/16" dia and must say the the 3/8" dia set out looks good.
Taff.
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RLWP
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Post by RLWP on Mar 16, 2013 16:42:46 GMT
Going massively off-topic - The CAD manager at Shorts explained what a difference it made to be able to draw aircraft cabin sections on computers. Previously they would have had to draw seven or eight concentric circles, full size, with a pen and trammel bar. That meant one man to draw the line, one man to hold the point of the trammel in place, and another man to hold the trammel bar as the draughtsman shuffled forward. Best part of a days work for three men
Anyway, this GWR loco of yours...
Richard
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smallbrother
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Post by smallbrother on Mar 16, 2013 21:12:19 GMT
Hello all, Just a few words. 4930, many thanks about the "Drop compass", my offer was accepted and I've paid for it now. Having said that I am still in the market for a "drop compass" which carry's a technical pen, they must be out there somewhere. Taff. Am I missing something - would a plastic template with holes in it do just as good a job? Pete.
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jma1009
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Post by jma1009 on Mar 20, 2013 11:32:21 GMT
hi peter, such a shame you no longer have your CITY drawings i dont remember the CITY but remember your PRINCE CHRISTIAN at one of the london shows....a beautiful loco! boiler tubes... i like plenty of free gas flow area through the tubes. so i would go for 7/16" dia flue tubes and 2 x 3/4" superheater tubes. don young's No.1 RAILMOTOR has quite a short boiler but has 7/16" dia tubes and the boiler steams incredibly well. however if you apply jim ewins' formulae to it, it shouldnt be a good boiler. a good example of where one can be easily led down the wrong path by applying theory and science too much, whereas empirical results show something quite different. cheers, julian
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taff
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Post by taff on Mar 20, 2013 13:24:02 GMT
Hello Julian and all, I had intended to wait a little longer before another post but I feel I must give an answer to Julian. Julian, I owe you an apology. In an ealier post you stated that the footplating covered the tops of the frame and I contradicted you in a later post. Now that I am working on the top edges of the frame and boiler I can see that the footplating does indeed cover the top of the frame. Please accept my apology and thanks for being a gentleman in not taking me to task about it. Re City of Truro all I have left of the sereies of drawings is one of my G.A.'s which I did for the engine and tender which shows the original cast iron chimney. It probably wouldn't take much work to re-draw the "City" after all the tender drawings are done and are the same as for the "Dean Single" while the cylinders and valve gear are the same as the Dean while the Standard No 4 boiler already exists as part of my series on the "Saint".and engines with thirty inch stroke cylinders. I still have most of the patterns therefore the "City" may be something to think about in the future. Re the Biler flu tubes I think you may be right but I haven't finalised that by any means and I'm still open to advice. "Prince Chrisdtian" !, good lord above, your memory is good, that was over 30 years ago, Silver medal and J. N. Maskelyne cup etc and all that !. Richard and Pete = Cad operated machines ! plastic templates etc ! Fellas you are frightening me they haven't invented them yet have they. Hmmmm.
Taff.
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smallbrother
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Post by smallbrother on Mar 21, 2013 12:54:01 GMT
Pete, Taff, I am talking of a plastic template that costs less than a fiver. It has holes of varying radius in it that you centre up, stick your pen/pencil in and draw the circle. How about this:- www.studioartshop.com/acatalog/info_1100.htmlThat thing you use came out of the ark, and not the steam driven one either. Pete also a Taff
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