hat
Active Member
Posts: 48
|
Post by hat on Sept 18, 2007 11:39:07 GMT
I want to scale down some drawings from 5inch to 3.5 and my maths is a bit rusty. Can anybody give me a simple factor or formula to do this.
Hat
|
|
jackrae
Elder Statesman
Posts: 1,333
|
Post by jackrae on Sept 18, 2007 12:15:20 GMT
take the 5" dimension shown and multiply it by 7 then divide the answer by 10 to get the 3.5" dimension
For example :
say a 5" loco dimension is given 3.256"
times 7 = 22.792"
divided by 10 gives 2.279"
so the 3.5" scale dimension is 2.279"
regards
jack
|
|
hat
Active Member
Posts: 48
|
Post by hat on Sept 18, 2007 20:20:12 GMT
Thanks for that Jack - now I see the answer it makes me feel a bit thick!!!  Many thanks |
|
Myford Matt
Statesman
There are two ways to run a railway, the Great Western way, and the wrong way.
Posts: 621
|
Post by Myford Matt on Sept 18, 2007 21:02:45 GMT
Simply multiply by 0.7
5 x 0.7 = 3.5
Matt
|
|
barryc
Active Member
Posts: 12
|
Post by barryc on Mar 19, 2008 20:32:32 GMT
If you need scaled drawings on CAD I might be able to help. Let me know via PM.
Cheers
Barry
|
|
hat
Active Member
Posts: 48
|
Post by hat on Mar 24, 2008 11:43:41 GMT
My original request for information related to "Wessie" currently being serialized in Engineering in Miniature which I quite fancy scaling down to 3.5 inch. ( and before hell and brimstone descend upon me I have the necessary copyright permission!) So its still an idea, but thanks for the drawing conversion offer.
Hat
|
|
simonwass
Part of the e-furniture
Cecil Pagets 2-6-2 of 1908. Engine number 2299. Would make a fascinating model....
Posts: 472
|
Post by simonwass on Mar 24, 2008 23:26:23 GMT
I wouldnt think you need copyright permission to scale a design down, in effect you are producing something entirely new.
One of my projects is the Titfield Thunderbolt train (14xx, W&U coach & Toad). I bought the 5" Toad drawing from Doug Hewson and scaled it up, he has a 5" one, mine is 7 1/4". The coach drawing was bought from the GERS, I may produce plans for it, I have no plans to ask permission from the person who drew the 1/2" scale drawing. The 14xx was going to be a Dart but will now be a new scale design.
As far as I know, copyright is like for like, a copy. Scaling something isnt copying. Asking permission or even simply saying what you are doing is nice, but I dont think it is legally necessary. Someones bound to know otherwise!
|
|
|
|
Post by baggo on Mar 25, 2008 0:34:57 GMT
I've often wondered if this is true if you produce your own set of drawings for a particular model (sorry Curly, miniature). I produce my own drawings for the locos I am working on with the 'often necessary' modifications to make everything fit together as it should. Therefore, I am producing a new set of drawings different to the old ones.
As it happens, most of my work is with 2½" gauge stuff and the 2½" gauge Association (of which I am a member) has permission to reproduce anything 2½" related published in ME or English Mechanics. The exception to this is certain drawings held by Reeves, for which they claim copyright (even though they have little interest in the designs) and GLR, who do at least supply castings.
|
|
