Darjeeling frames

Advert

New Replies

Report Bug

Help/FAQs

Darjeeling frames

This topic has 17 replies, 7 voices, and was last updated 16 January 2011 at 11:13 by Donald Mitchell.

Viewing 18 posts - 1 through 18 (of 18 total)

Author

Posts
14 June 2010 at 16:24 #52646
Roger Page 1
Participant
@rogerpage1
I am considering the Darjeeling as a new project. Is anyone supplying laser cut frames?

Edited By Roger Page 1 on 14/06/2010 16:25:16
Advert

14 June 2010 at 16:24 #955
Roger Page 1
Participant
@rogerpage1
1 July 2010 at 16:05 #53046
peter ravenscroft
Participant
@peterravenscroft57700
blackgates said that they where i have e-mailed them about castings etc but have not had a reply yet

i am bulding it in 3 1/2 gauge and i am up todate wth the latest issues not found any problems as of yet

regards

peter
12 January 2011 at 17:10 #62307
millinghead
Participant
@millinghead
NOT FOUND ANY PROBLEMS

started cutting out frames ,drawings have missing dimensions .

at the rear of frame centre line ofrear axlebox to centre line of what i dont know,

I thought this was the centre of the shape at the top of the frame but visually

the (centre line) looks way off centre .

that’s when work on this project stopped.

I look on this website regularly but no postings since shortly after the article started.

Iam beginning to think that other people started this project but after they have seen the

host of drawing errors, missing dimensions, (always the crucial one’s)

and have given up
12 January 2011 at 18:03 #62312
JasonB
Moderator
@jasonb
Posted by millinghead on 12/01/2011 17:10:30:

I look on this website regularly but no postings since shortly after the article started.

Maybe look a bit more carefully, this is the thread that has most of teh errors in it discussed

http://www.model-engineer.co.uk/forums/postings.asp?th=41333&p=1

J
12 January 2011 at 19:27 #62318
David Clark 13
Participant
@davidclark13
Hi There

I am not aware of many errors on this loco.

What ME issues are the errors in.

regards David
12 January 2011 at 21:19 #62327
JasonB
Moderator
@jasonb
Maybe I should have said errors & queries, as there seem only two errors mentioned in the thread I linked to one was the extra 1 1/2″ added by the ME draughtsman and the other the 0.780″ thick spring.

Don’t know what millingheads errors/ size queries are.

Jason.
12 January 2011 at 23:31 #62346
Donald Mitchell
Participant
@donaldmitchell68891
Millinghead,

I take it from the tone of your mail that you are somewhat disgruntled by, and I quote, “the host of drawing errors, missing dimensions, (always the crucial one’s)” you seem to have encountered in the B Class drawings.

As far as I am aware there have only been two errors printed, as already quoted by JasonB, 1. the dimension added by the ME draftsman incorrectly and 2. the similarly wrongly quoted thickness of the top spring leaf. Neither of these errors can be attributed to the designer, Raymond McMahon.

I am having some difficulty in understanding exactly what dimension you claim to be missing from the drawing, I quote from your mail:-

“at the rear of frame centre line ofrear axlebox to centre line of what i dont know,

I thought this was the centre of the shape at the top of the frame but visually

the (centre line) looks way off centre”

If you could clarify your query, I will take up the question on your behalf with Raymond and get the definative answer for you.

Raymond does not use the internet, I am in constant conversation with him and I have his authority to post to this forum on his behalf.

Raymond spent many months doing nothing but checking and double checking the drawings before giving the project to ME for publication, he is very nearly certain that there are no missing or wrong dimensions on the drawings – and most certainly not a “host”

I can advise that quite a few B Class engines are being made, a good number of them are right up to date with the series as it is being published. Very few problems are being reported, in fact only two so far.

Please don’t just bad-mouth the project; if you need some clarification on any point of the build, ask the question and I’ll get an answer quickly from Raymond.

The finished B Class engine is a real beauty and it will be very well worth the effort.

Donald Mitchell
Castle Douglas
Bonnie Scotland
13 January 2011 at 19:34 #62404
millinghead
Participant
@millinghead
on page618

centre line of rear axlebox , distance to the centre line in question , at the top of the drawing is4 1/4 BUT lower down just above the hornslot the distance is 4 5/16 ?

my question is . Is this centre line the centre of the top cut out 7/8 deep as it does not look to be in the centre .

chassis bracket on page 675

plan view why not put a dimension to show how far the outside of the bracket is from the frame (sorted this one by doing my own drawing ,full size) !
13 January 2011 at 19:54 #62405
JasonB
Moderator
@jasonb
Yes it does look like the centre lines have been given two different dimensions, I’d say its probably an ME draftsman rather than the original drawings.

Probably the 4 5/16 is axle to the row of 4ba holes and the 4 1/4 should be to the middle of the 2 13/16 springing points for the curves but as you say even then its way off centre but then again we have had this before on other engines where dimensions were altered but not the drawing.

Jason

Edited By JasonB on 13/01/2011 19:58:31
13 January 2011 at 21:19 #62410
David Clark 13
Participant
@davidclark13
Hi There

Yes, the illustrator joined the lines up as they were in line.

I missed this on the drawings as both dimensions were correct.

regards David
14 January 2011 at 16:02 #62443
peter ravenscroft
Participant
@peterravenscroft57700
hello millinghead

if you send me your e-mail address i’ll send you all the faults that i have found so far i am nearly keeping up wih the published artical but have fallen back a bit due to the cold weather my e-mail address is peterravenscroft@blueyonder.co.uk

regards

peter
15 January 2011 at 15:15 #62510
Donald Mitchell
Participant
@donaldmitchell68891
Hi Millinghead,

I regret I am unable to understand your last post, made on the 13th January at 19.34

You say:- on page 618 – centre line of rear axlebox etc.,

On page 618 of my M.E., Raymond is dealing with the cylinders ?

and you further talk about:-

Chassis bracket on page 675 – on page 675 of my M.E., there are drawings of bits for a Maudsley engine ?

Confused !

Donald Mitchell
Castle Douglas
Bonnie Scotland
15 January 2011 at 16:37 #62515
JasonB
Moderator
@jasonb
Look at the drawing on page 618

In the middle of the drawing at the top there is “C/L” from the right of this line to the axle ctr line is given as 4 1/4″

Further down the drawing between the same two ctr lines is a dimension of 4 5/16.

Regarding the bracket on page 625, I don’t feel there are any other dimensions needed, you have the radius of the bracket and where the curve starts and ends so its just a case of setting the dividers to the radius, swinging two arcs and where they cross is the point you mark the curve from, simples

J
15 January 2011 at 16:38 #62516
David Clark 13
Participant
@davidclark13
Hi Jason

It is only simples if you know how (or are a Meercat).

regards David
15 January 2011 at 16:54 #62517
Donald Mitchell
Participant
@donaldmitchell68891
There isn’t a drawing on page 618 – only four pictures of the cylinders.

and on page 625 there is stuff about the van Rennes engine ?

That is, unless you lot have a different M.E, issue number 4391 from the one I have. ?

Donald Mitchell
Castle Douglas
Bonnie Scotland
15 January 2011 at 17:16 #62520
Nicholas Farr
Participant
@nicholasfarr14254
Hi Donald,

I believe the page numbers are in reff of issues 4378 and 4379 vol 204.

Regards Nick.
16 January 2011 at 11:13 #62559
Donald Mitchell
Participant
@donaldmitchell68891
Nick,

Thank you for your explanation, all is now clear.

I had failed to remember that the page count returned to 1 when the new volume 205 started with issue 4381 in July 2010

Do the members of this forum agree with me, that it would be a good idea if contributors, when quoting a page number, would also add the issue number? – Especially when discussing something which appeared some issues previously.

I do also wish that some contributors would add a bit of punctuation to their posts, some are next to impossible to understand !

Donald Mitchell
Castle Douglas
Bonnie Scotland
Author

Posts