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05-20-2010, 02:10 PM
can anyone please teach me how to put offsets into a computer programme,
& which programme

Peerie Maa
05-20-2010, 02:39 PM
What do you want to do with them when they are entered?
A simple curve fit for preliminary fairing can be done with Excel from that nice Mr Gates, but if you want to do real lines fairing you need appropriate software.

TerryLL
05-20-2010, 03:26 PM
Here ya go.

MS Excel. Feet as decimal to feet-inches-eighths.

=INT(A5/12)&" - "&INT(MOD(A5,12))&" - "&ROUND((A5-(INT(A5/12)*12)-INT(MOD(A5,12)))*8,0)

In the case A5 is the cell where the measurement is expressed as a decimal, say 14.93. Paste this formula in another cell and it will display 1 - 2 - 7.

Pretty slick, eh?

05-20-2010, 04:07 PM
slick, i thought it was greek
what does it mean

05-20-2010, 04:08 PM
Nick, i have faired the lines, i want a 3 d drawing

TerryLL
05-20-2010, 04:20 PM
Excel won't produce a lines drawing. The formula only converts decimal feet to feet-inches-eighths. Probably not what you're looking for.

05-20-2010, 04:33 PM
im using metric, for simplicity, is there a free download for excel, or how much is it

G. Schollmeier
05-20-2010, 04:40 PM
Peter I use Rhino which is a very good 3D modeler. In the past I have entered the offset points into Rhino and used those points to create 3D hull surfaces. Depending on the number of points this can be tedious. Good results requires a fair amount of competency with the software. I have found it easier to draw from scratch. Here is an example.

http://www.boatdesign.net/gallery/data/3280/32_offsets.jpg

http://www.boatdesign.net/gallery/data/3280/32_3D.jpg

05-20-2010, 05:01 PM
thank you G S

donald branscom
05-20-2010, 06:33 PM
im using metric, for simplicity, is there a free download for excel, or how much is it

Metric???? What for?

Feet -inches - eighths, why make 1/8 - 3.175mm ????
Guess you just like more numbers.

Are ALL of your tools metric too????
Just think of all the wasted time converting an entire set of plans to all those 4 digit numbers.

mmd
05-20-2010, 06:41 PM
Imperial measurements are for builders, metric for designers. <wink>

Crunching numbers is so-o-o-o much easier in metric.