Model Boat Mayhem
Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: Stavros on August 03, 2007, 06:29:55 pm

Right you clever lot out there,if I get a tug plan which at the present is 1/30th which gives a hull size of 770mm and up the hull size to 1145mm which is one and a half times the original size,what scale would the tug end up cheers Stavros

What I did is multiply 770 by 30, then divide the answer by 1145 gives you near as damn it 20,
so my answer is 1/20 th ???

Sounds dammed logical to me but as I am not a logical person(Robert carefull !!!!)but it sound good any other bright ideas Stavros

Near enough right, but your initial maths isn't! Oneandahalf times 770 is 1155, not 1145, which will give you exactly 1/20th.
Rick

As stated above it's 1/20th. Try this for size (pun intended):
1/30 x 3/2 (that's 1 and a half as a vulgar fraction) give 3/60 = 1/20.
this method will work for any variation although some results will be neater than others depending on the input.
HTH
Doug

Hi I agree, use fractions, it's much easier. I was just about to post the same, decimal may be easy for some things but give me fractions any day.
regards Roy

Gents, dont know if i am missing something here but, Stavros said
Right you clever lot out there,if I get a tug plan which at the present is 1/30th which gives a hull size of 770mm and up the hull size to 1145mm which is one and a half times the original size,what scale would the tug end up cheers Stavros"[/
Weeeel, 770 x 1.5(1 1/2)=1155. now i know that only makes 10mm difference, but it can make a difference. not being pedantic, just want to make sure my adled brain hasnt totally crapped out.
also, if the scale is 1/30th, wouldnt one and a half times bigger be 1/15th. Pleeese tell me where my thinking has gone wrong.
Confused
colin

That will give a scale of 1:20,
Worked out like this: 30x770mm = 23100mm
23100/1145 = 20.17
hence scale is 1:20th.
It works for me anyway!
Ian

1:15 is twice as big as 1:30
30 divided by 2 = 15

As stated above it's 1/20th. Try this for size (pun intended):
1/30 x 3/2 (that's 1 and a half as a vulgar fraction) give 3/60 = 1/20.
Doug
Doug your calculation should have read 30/1 x 2/3 = 60/3 = 20 therefore 1 : 20
Or maybe not

ooooooops, had a very bad day yesterday. single brain cell couldn't handle the simplest of tasks at work, obviously rolled over in to R&R time. realized walking home.
just practicing my senile dementia,
ta
colin

As stated above it's 1/20th. Try this for size (pun intended):
1/30 x 3/2 (that's 1 and a half as a vulgar fraction) give 3/60 = 1/20.
Doug
Doug your calculation should have read 30/1 x 2/3 = 60/3 = 20 therefore 1 : 20
Or maybe not
Dicky
It all depends whether you are going up or coming down ;D ;D ;D
Doug

Right ???

I was going to moderate this thread as I couldnt understand a thing ;D ;D But on re reading its basic maths and I can actually see what is what !
Shane

Thank god somebody can ::)

Try this for size !!!!!!!
http://www.sfmbc.net/scalecalc103.zip
Save a lot of hassle  works a treat :)
Iain

That link deserves a permanent place in any FAQ section that might happen.