Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: Scale as a percentage  (Read 3194 times)

Capt Podge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,443
Scale as a percentage
« on: December 16, 2015, 05:00:34 pm »

I've acquired a set of plans.
 
The GA profile is 1/48 scale
The GA deck view is 1/48 scale
The lines plan is 1/16 scale.
 
Contacted the print shop to ask about getting the lines plan reduced from 1/16 to 1/48 - the answer I got was "yes, we can do that - what percentage do you want it reduced by" ?
 
....well, that struck me dumb, can anyone give me the answer please ?
 
Apologies in advance if this has been covered before.
 
Regards,
 
Ray.
 
Logged

inertia

  • Guest
Re: Scale as a percentage
« Reply #1 on: December 16, 2015, 05:25:08 pm »

Ray
1/48 is a third as big as 1/16 (3 x 1/48= 3/48 = 1/16) so percentage BY is 66.66% (2/3), whereas percentage TO is 33.33% (1/3). That will probably confuse the bejesus out of them, so just tell them you want it 33.33% (or a third) the size of the original. Bet they still get wrong!
Dave M
Logged

Capt Podge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,443
Re: Scale as a percentage
« Reply #2 on: December 16, 2015, 05:30:58 pm »

Thanks for that Dave. I was thinking along those lines myself but was concerned my sums were out. :embarrassed:
 
Regards,
 
Ray.
 
Logged

reg

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 48
  • Location: west essex
Re: Scale as a percentage
« Reply #3 on: December 16, 2015, 06:01:55 pm »

I just draw 2 lines on the plan the size I want  the hull to be and tell the guy to get on with it
if thay can't do that I go to another copy shop
    Reg
Logged

Capt Podge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,443
Re: Scale as a percentage
« Reply #4 on: December 16, 2015, 06:13:00 pm »

Yep, that makes sense Reg - thanks for that.
Unfortunately there aren't that many in the area with the equipment to deal with a 14ft long roll of paper. It's something to do with the scanner memory capacity, so I'm told.
It may be that I'll have to cut it...we'll see.
 
I'll update on here when I've got the job done. O0
 
Regards,
 
Ray.
 
Logged

Netleyned

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,051
  • Location: Meridian Line, Mouth of the Humber
    • cleethorpes mba
Re: Scale as a percentage
« Reply #5 on: December 16, 2015, 06:26:13 pm »

Before the plan is scanned, draw a line on it
in a few places along the roll of exactly 30 inches.
The reduced plan should show these as 10 inches.
Measuring these will show the linear accuracy on
a 14 ft length of scan.


Ned
Logged
Smooth seas never made skilful sailors
Up Spirits  Stand fast the Holy Ghost.
http://www.cleethorpesmba.co.uk/

Capt Podge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,443
Re: Scale as a percentage
« Reply #6 on: December 16, 2015, 06:47:43 pm »

Ned - that's brilliant, simply brilliant.
 
That way I'll be sure they have got it right - nice one. :-))
 
Regards,
 
Ray.
 
Logged

grendel

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,948
  • Location: Canterbury, Kent, UK
Re: Scale as a percentage
« Reply #7 on: December 16, 2015, 08:34:07 pm »

There may well be some stretch on the length of the plan, these scanners are generally rated to about 0.5% accuracy (1mm every 200mm, so the finished result can be slightly off we generally reckoned about 5mm over an A0 plan. they can be calibrated to better accuracy, but the copy shops hate doing it as it costs time and money. draw a line in both directions and measure both of them. then expect to print a second copy to get it spot on.
Grendel
Logged

Capt Podge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,443
Re: Scale as a percentage
« Reply #8 on: December 16, 2015, 08:44:12 pm »

That's another good point Grendel - I'll ensure that gets done as well. <*< :-))
 
Regards,
 
Ray.
 
Logged

essex2visuvesi

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,148
  • Location: Finland, England, Finland!
Re: Scale as a percentage
« Reply #9 on: December 17, 2015, 08:13:04 am »

When you draw the reference lines make sure you do them in both directions (ie horizontally and vertically)
Logged
One By One The Penguins Steal My Sanity
Proud member of the OAM  (Order of the Armchair Modeller)
Junior member of the OGG  (Order of the Grumpy Git)

Capt Podge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,443
Re: Scale as a percentage
« Reply #10 on: December 17, 2015, 04:42:03 pm »

When you draw the reference lines make sure you do them in both directions (ie horizontally and vertically)

 :-)) :-)) :-))
Logged
Pages: [1]   Go Up
 

Page created in 0.112 seconds with 22 queries.