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Modeling in General: Advice on...
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Using Scale Drawings
gunnerPhil
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Virginia, United States
Joined: April 06, 2007
KitMaker: 30 posts
Model Shipwrights: 6 posts
Posted: Tuesday, April 14, 2020 - 11:18 AM UTC
Hello,
I am slowly accumulating things for a project and have a question about scale drawings. I am going to attempt build a Japanese CV in 1/350 scale. most of my drawings are 1/400 or 1/200 scale. How do I shrink or enlarge them to 1/350 scale ?? Thanks in advance.
Dioramartin
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New South Wales, Australia
Joined: May 04, 2016
KitMaker: 1,340 posts
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Posted: Tuesday, April 14, 2020 - 02:14 PM UTC
Hi Phil, someone ought to check my math but using a good photocopier (if any Copy-shops are still open) you could enlarge/reduce as follows;

Reduce the 1/200 drawings by 57.14% and Enlarge the 1/400 drawings by 112.5%

If you can稚 change the plan sizes anywhere I guess you値l just have to use those conversion figures for each part you make! Mind-bending & if I知 wrong it only goes to show I知 no engineer, but at least I tried!
AussieReg
Staff MemberAssociate Editor
AUTOMODELER
#007
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Victoria, Australia
Joined: June 09, 2009
KitMaker: 7,677 posts
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Posted: Tuesday, April 14, 2020 - 02:53 PM UTC

Quoted Text

Reduce the 1/200 drawings by 57.14% and Enlarge the 1/400 drawings by 112.5%



Tim, your numbers are spot on but the wording should be reduce to and enlarge to (rather than by).

Pedantic, I know, but the results are very different!

Cheers, D
Dioramartin
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New South Wales, Australia
Joined: May 04, 2016
KitMaker: 1,340 posts
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Posted: Tuesday, April 14, 2020 - 03:22 PM UTC
Thanks Damo! I知 quite shocked actually, so now I知 good to do a scale model of the Tacoma Narrows bridge right?! Yep you're right I began to think I should have said 鍍o after I posted but I was too exhausted to log back in until I壇 had a nap
AussieReg
Staff MemberAssociate Editor
AUTOMODELER
#007
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Victoria, Australia
Joined: June 09, 2009
KitMaker: 7,677 posts
Model Shipwrights: 151 posts
Posted: Tuesday, April 14, 2020 - 03:43 PM UTC

Quoted Text

Thanks Damo! I知 quite shocked actually, so now I知 good to do a scale model of the Tacoma Narrows bridge right?! Yep you're right I began to think I should have said 鍍o after I posted but I was too exhausted to log back in until I壇 had a nap



Fair call Tim, you can't rush these things and naps are important. I should have realised that's where you were and left it a bit longer before I commented
gunnerPhil
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Virginia, United States
Joined: April 06, 2007
KitMaker: 30 posts
Model Shipwrights: 6 posts
Posted: Wednesday, April 15, 2020 - 05:18 AM UTC
Thanks for the help...have a nap and a beer on me
MrchntMarine
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Louisiana, United States
Joined: February 11, 2020
KitMaker: 55 posts
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Posted: Saturday, May 02, 2020 - 09:33 AM UTC
if this helps....

https://drive.google.com/file/d/1ZWbd5zPMO1U5A4cpeLnBvvpjePw7A50P/view?usp=sharing
Removed by original poster on 05/02/20 - 22:05:55 (GMT).
gunnerPhil
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Virginia, United States
Joined: April 06, 2007
KitMaker: 30 posts
Model Shipwrights: 6 posts
Posted: Sunday, May 03, 2020 - 11:06 AM UTC



Hey,
Thanks a lot I had this along time ago in a magazine article and it disappeared over time and my many moves. I is now saved on my computer.
jon_a_its
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England - East Midlands, United Kingdom
Joined: April 29, 2004
KitMaker: 1,309 posts
Model Shipwrights: 11 posts
Posted: Sunday, May 03, 2020 - 09:42 PM UTC
My favourite tool is Frank Krenshaws Scale Calc

Easy to use, you can go from known to known scales (1:96 to 1:35, etc) or from known length on drawing, to desired output length, Metric, Imperial or mixed! it will give you the %age enlargement needed.

The above takes the whaa??? out of it for those of us mathematecally challenged.