Enlarging plans

[Paul Morris]

Hi fellas.
Hopefully a quick question here if you had a set of 1/25 scale plans and wanted them enlarged to 1/6 scale what percentage enlargement would you need to ask for at the printers to get it spot on??
Cheers Paul

[leesellars]

Hello Paul

That is where inacuracys come in. Dont go there.Work out from the dimentions from whatever scale up to 1:1 and then back to the scale you want ie 1:6th. That is the best thing to do.

Lee

[Paul Morris]

Hi Lee.
yes thanks for that, and that is what i would normally do myself but... in this instance i have a book that contains all the parts to produce a card model in 1/25 scale so i just wanted to get the parts enlarged on paper and then make the 1/6 scale parts myself which sounded easy till i started to try and work it out ha ha.
On another note i have not phoned you about anything else because as you see i am sat at home now hope you know what i mean talk soon thanks again Paul

[Adrian Harris]

I make it 416.6666% recurring, so you're not going to get it accurate.

As Lee says, photocopiers introduce errors in the copying process, and it's usually worse in one direction than the other, so you'd probably end up with a part which was 1/6th scale wide but 1/6.5 scale long

Adrian.

[Paul Morris]

Hello Adrian.
Thanks for taking the time but as you both say it looks like i might end up going the old tried and tested way, just thought i had seen a chance for a short cut.
Thanks again Paul

[Richie Wignall]

Hi paul
My brother in law works at BAE systems as a designer, and he's also well up in the engineering ,he as done some scaling plans down and up. He used to work at weekends at steam town, Carnforth, and he has done models from the 1/1 scales down to 0 gauge - perfect and he,s mad abaut steam ect.
I could ask him when I see him, as I know he's done plenty of things like that, but he's on holiday at the moment for 3 weeks.
Richie

[Joe Boylan]

Hi Paul:
I have made a scale converter chart in excel, it converts all decimal measurements for - 1/35 - 1/16 - 1/8 to 1/6th and convert 1/6th to full scale and full scale to 1/6th. If you would like it send my your e-mail address and I will send it to you. Very small file - 32K.

It's true about the scaling in copying - you can measure your print if you are sure its to scale or buy the model and scale off the parts themselves.

Joe

[Allan Webster]

Instead of copying you could re-size the image in an image editing programme such as Adobe Photoshop. This should create an image which is exactly the right size and in the right proportions. You would then need to find a print shop that can print to a suitable size of paper.

If, for any reason, you don't get Joe's excel file then let me know and I will create one and send it to you.

On a calculator use the following procedure :

1. type in your measurement, say 17.5
2. multiply by the scale, for example 25 for 1/25 or 32 for 1/32 (in the example this gives 437.5 for 1/25)
3. divide the result by 6 (in the example 72.92)

[leesellars]

Hello Chaps

I would stick to doing it the old way useing calculus.Unless you have the real thing of coarse. Books are a good source. But on some Plastic models they arent what they seem.If you want 100% accuracy take off the real thing. Or you make do and have modelers disgression.

Lee

[Paul Morris]

Hello Richie.
Sorry i missed your reply last night mate, thanks very much for the offer we can have the crack about it this weekend see you Sat looks like a waterproof job again eh? we must just be lucky

Joe.
Thank you also i saw your reply this morning, i would very much like a copy please my e mail is pjtigerman@aol.com thank you very much.

Alan.
Again thanks very much for your time if i get stuck i will certainly give you a shout.
Thanks to you all.
Kind regards Paul