Topic: scale (Read 9509 times)

lordfortesque · « **on:** February 08, 2015, 09:44:37 am »

HELP,, if a boat is 12.5 metres x 3.5 metres what would the size be in 1/24 scale
mike.

Netleyned · « **Reply #1 on:** February 08, 2015, 10:03:47 am »

In old money about 20 inches by 5 3/4.

Ned

davidm1945 · « **Reply #2 on:** February 08, 2015, 10:47:19 am »

Got a calculator? Multiply by 100 then divide by 24 - gives you the answer in centimetres.

ie :- 12.5 metres x 100 = 1250 centimeters divided by 24 = 52.1 centimeters.

Dave

lordfortesque · « **Reply #3 on:** February 08, 2015, 05:03:37 pm »

thanks guys
mike.

Hellboy Paul · « **Reply #4 on:** February 08, 2015, 05:16:56 pm »

I use this site, http://jbwid.com/scalcalc.htm Saves overtaxing the grey matter..

Paul

RAAArtyGunner · « **Reply #5 on:** February 08, 2015, 08:52:25 pm »

Quote from: Hellboy Paul on February 08, 2015, 05:16:56 pm

I use this site, http://jbwid.com/scalcalc.htm Saves overtaxing the grey matter..

Paul

Now that is handy, yep the brain will now last a little longer

Colin Bishop · « **Reply #6 on:** February 08, 2015, 09:00:17 pm »

Quote

Now that is handy, yep the brain will now last a little longer

Nope! It's working it out for yourself that keeps the brain functioning!

derekwarner · « **Reply #7 on:** February 08, 2015, 10:14:22 pm »

......must admit RAAArtyGunner....I don't like it either but from a different gripe

It uses cm as a unit of length

...so whilst this may well be the Australian Standard for such units....the Standard was approved by a panel of bean counters

Not one Engineer was appointed to the OZ Metrication Board in the early 60's

Now some may scoff at this....but one Saturday morning we eagerly awaited a CNC produced hydraulic spacer barrel for the Steel industry....the AutoCAD drawing confirmed the spacer barrels were 140 mm in length... but some dingbat during the CNC programming converted this to the Australian Standard........yes you guessed it...the spacer barrel was ten times the original @ 140 cm in length

From my studies

even Noah used mm when fettling timber for his Ark.... Derek

Bob K · « **Reply #8 on:** February 08, 2015, 10:22:56 pm »

The scales that really get me head-scratching as a 1970 onwards all-metric draughtsman is on early warship plans that quote daft things like 1/4 inch to the foot. It might as well be in Barleycorns.

Anyone else confused about ancient imperial units should watch this YouTube clip that nicely explains how easy and rational they were. https://www.youtube.com/watch?v=r7x-RGfd0Yk

RAAArtyGunner · « **Reply #9 on:** February 08, 2015, 10:31:21 pm »

Derek,

Builders must be brainier than engineers

I recall that when metrication was foisted upon us, one of the things agreed to, was that centimetres would not be used in building, only Millimetres and Metres.

The logic being, errors of measurement would be readily apparent and to this day that works well. I never use centimetres.

Colin,
The table will allow me to use my brain for other things

a little longer.

RAAArtyGunner · « **Reply #10 on:** February 08, 2015, 10:42:50 pm »

Quote from: Bob K on February 08, 2015, 10:22:56 pm

The scales that really get me head-scratching as a 1970 onwards all-metric draughtsman is on early warship plans that quote daft things like 1/4 inch to the foot. It might as well be in Barleycorns.

Anyone else confused about ancient imperial units should watch this YouTube clip that nicely explains how easy and rational they were. https://www.youtube.com/watch?v=r7x-RGfd0Yk

Simples really,
1/4 inch is 1:48 scale , 4 Quarters to 1 inch, 12 inches 1 foot, 4 x 12 = 48
1/2 inch is 1:24 scale , 2 Halves to 1 inch, 12 inches 1 foot, 2 x 12 = 24

The youtube clip makes perfect sense to me

davidm1945 · « **Reply #11 on:** February 08, 2015, 10:50:23 pm »

Oh how my sons laughed when poor old Dad used feet and inches. "Come on, Dad, get yourself dragged into the 20th century - we've gone metric, you know". Then they both went into the aerospace industry and had to learn good old imperial standards because that's what the Americans use. Oh how I laughed!!

Dave.

Bob K · « **Reply #12 on:** February 09, 2015, 03:58:14 am »

Come on, when did two feet five and seven sixtyfourths adequately convey a visualisable distance?
It is merely a concatenation of several incompatible medieval and inconsistent measurement systems.
Even the Americans went Metric eventually. We went Metric in 1970, and I for one never shed a tear for the demise of letter and number drills and the plethora of countless other oddball systems. ie £ s d money !!!

A scale of 1/4" to the foot is a leftover from the days when drawing instruments included a set of various scale rules so you did not have to calculate out every single thing you measured.

RAAArtyGunner · « **Reply #13 on:** February 09, 2015, 06:02:16 am »

Don't be too hasty and throw away those scale rules as they all come in handy

when looking at old plans/drawings particularly when adding to or altering something constructed using the imperial system, such as pre metric ships.

Bob K · « **Reply #14 on:** February 09, 2015, 07:05:34 am »

If only ! Sadly my drawing instruments all went long ago. These days I prefer to work off plans scaled 1:1 with what I am building. That way I measure in mm, and can build in the same.

Netleyned · « **Reply #15 on:** February 09, 2015, 08:51:49 am »

WOW
The guy only wanted to know the length and beam of his model

Ned

RAAArtyGunner · « **Reply #16 on:** February 09, 2015, 10:58:07 am »

Wasn't it a long one with a big beam requiring lotsa input

After all we gota live up to our name

roycv · « **Reply #17 on:** February 09, 2015, 11:53:32 am »

Hi you lot! I have not really gone decimal let alone metric and get on very well with fractions.
Anyway industry is only paying lip service to it look at a jar with a pound of jam in it or is marked 454 gramms just the sort of number commonly used?
I buy 2.272 litres of milk in a container marked 4 pints, now that was a bit of luck!

Go to a French market (I mean one in France!) if you want 1/2 a kilo of whatever, you ask for a pound.
For the small stuff I have an electronic pair of calipers and when measuring something I switch to th enearest sensible whole number.

Those Luddites were a nice bunch of guys who just got sacked by poor quality management.
regards Roy

Mad Scientist · « **Reply #18 on:** February 09, 2015, 10:06:44 pm »

I finally finished all those little jobs around the house. The last one was the replacement of some baseboards. Some were an exact # of mm long, others came out to an exact 1/64". So, I just used what was more convenient, and imagined my old Engineering profs finding out about my mixing of systems - their heads would have exploded! - Tom

davidm1945 · « **Reply #19 on:** February 09, 2015, 10:23:36 pm »

Quote from: Mad Scientist on February 09, 2015, 10:06:44 pm

I finally finished all those little jobs around the house. The last one was the replacement of some baseboards. Some were an exact # of mm long, others came out to an exact 1/64". So, I just used what was more convenient, and imagined my old Engineering profs finding out about my mixing of systems - their heads would have exploded! - Tom

You build baseboards to 1/64 of an inch? Respect...

Dave.

CGAux26 · « **Reply #20 on:** February 09, 2015, 10:32:19 pm »

I like light years for length. Fortnights for time. So light years per fortnight for speed. Or maybe furlongs per fortnight for slower speeds, like model tugs. R-I-G-H-T.

Are we having fun yet??

derekwarner · « **Reply #21 on:** February 09, 2015, 11:04:13 pm »

....."So light years per fortnight for speed".......goodness that's a big number

.....

186,000 ^ [24^60^60^14] = 2.249856 ^10 to the 11th power lYpF

....can't sort of get my mind on this value or its use......

Derek

david48 · « **Reply #22 on:** February 11, 2015, 12:05:56 am »

How come this measurement thing is so hard that's what the right rule for the right jobs for . My Dad was A carpenter / joiner /wheel right and some Woden boat repairs used to live on the Solway firth Coast . He said CM were for talors MM for engineers ,and when he measured timber it went a bit like this 2' 3" 1/2" 1/4 and a 1/16 don't know what it adds up to but if it's read of the rule like that it's easy to remember . All meant in good fun
David

vnkiwi · « **Reply #23 on:** February 11, 2015, 12:43:15 am »

all makes sense to me

davidm1945 · « **Reply #24 on:** February 11, 2015, 12:31:07 pm »

They should never have got rid of cubits!

1 cubit = 45.72 centimetres, easy ennit...

Dave

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Author Topic: scale (Read 9509 times)