Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: rickles23 on June 15, 2013, 02:57:46 pm

Title: More scale headaches
Post by: rickles23 on June 15, 2013, 02:57:46 pm

Hi,
 
I am making some 1:72 scale cabins and decks.
 
My problem is that I have been given the plans in 1:200 scale.
 
The original ship was
 
L = 372' 7"
W = 49'
 
How do I reconvert the plans?????
 
Regards

Title: Re: More scale headaches
Post by: TailUK on June 15, 2013, 03:09:41 pm

Multiply all dimensions from the 1:200th scale plan by 2.77 and that will be the dimension in 1:72nd scale.

Title: Re: More scale headaches
Post by: rickles23 on June 16, 2013, 08:50:13 am

Hi TailUK (http://www.modelboatmayhem.co.uk/forum/index.php?action=profile;u=9256), 
Thank you
 
Regards

Title: Re: More scale headaches
Post by: html on June 16, 2013, 02:36:10 pm

I always multiply by the plan scale, and then divide the answer by the scale you are working in.
 
Brian

Title: Re: More scale headaches
Post by: rickles23 on July 04, 2013, 09:24:41 am

Hi all,
 
I have done that but a lot of the results are like 2.4333.
 
So do I just use the first whole number?
 
Regards

Title: Re: More scale headaches
Post by: malcolmfrary on July 04, 2013, 09:35:05 am

Quote from: rickles23 on July 04, 2013, 09:24:41 am

Hi all,
 
I have done that but a lot of the results are like 2.4333.
 
So do I just use the first whole number?
 
Regards

If the units are mm, round to the nearest half mm, your example would give 2.5.
In all probability, you will find that this represents the thickness of the line on the drawing, and it is unlikely that you would measure from the original to anything tighter than the nearest mm anyway unless you use something like digital calipers.

Title: Re: More scale headaches
Post by: TailUK on July 05, 2013, 08:46:23 am

Quote from: rickles23 on July 04, 2013, 09:24:41 am

Hi all,
 
I have done that but a lot of the results are like 2.4333.
 
So do I just use the first whole number?
 
Regards

Round up or down accordingly.  For example if the number is say: 2.24 round it down to 2.0.  If it's 2.76 round it up to 3.  if it falls between 2.26 - 2.74 average it out at 2.50

Title: Re: More scale headaches
Post by: rickles23 on July 05, 2013, 09:18:09 am

Thank you for your help.
Regards

Title: Re: More scale headaches
Post by: hammer on July 05, 2013, 09:00:22 pm

Having built a few boats to a different scale than that of the plans. Not being good at sums (unless I have a £ in front ) I make a rule to the scale of the plan, marked in red. On the other side mark the scale required for the model, mark in black. 

Title: Re: More scale headaches
Post by: john44 on July 06, 2013, 07:10:36 am

I get the plans enlarged, then I can measure straight from the plan,
much,much easier.

john