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[chingdevil]

I have a drawing of a tug which I want to start as my next build. On the drawing it states the overall length of the tug is 25.945 metres in length, the drawing also shows what it calls station spacing at 2.33 metres, I presume these are the same as frames. Well according to the drawing there are 16 of these stations, which adds up to an overall length of 37.28 metres without the bow and stern.

If anyone has Autocad or Turbocad and can have a look at this drawing to check I am not going mad, it is in .dwg format I would be very gratefull


Brian

[Bryan Young]

I know I keep banging on about "Frames" and "Stations". Two entirely different things! PLEASE look at some earlier posts on this subject. "Frames" are what are actually fitted (in steel) by the ship-builder and give the hull a shape and a base for the hull plating. "Stations" are a purely architectural thing on the drawing board. "Stations" are drawn up at regular intervals along the length of a hull, with sub-divisions at the ends. For a short model "stations" are quite adequate. "Frames" are generally in the region of 2ft spacing.
If you had simply gone to "search" frames and stations you would not have needed to ask the question. BY.

[AlanP]

Yeah, thats told you       

[chingdevil]

Bryan

I asked the question because on this drawing there are marked up St -0.5 all the way up to St 10 16 of them, so how does the spacing of the station add up to more than the length of the hull, which BY is what I asked in the first place if you had bothered to read my posting.

[Malcolm Reade]

Chingdevil

I have AutoCad on my computers.  If you want to E-mail me a copy of your DWG file, I will save a copy of it as a PDF and E-Mail it back to you.

PM sent with my contact details.

Regards, Malc

[John W E]

hi ya there Brian

On your drawing of the tug, where it states 'overall length' does it state 'overall length - waterline length' or 'overall length - between perpendiculars' ????

To me, it sounds when you have read 'overall length' it is actually referring to either the 'waterline length' or 'length between perpendiculars'.

It is easy enough to check for the waterline; but, to explain perpendiculars - we havent go enough room on the forum 

aye
john e
bluebird

[Bryan Young]

Start off in the middle (longitudinaly) and you'll find the stations equidistant over the length. When the hull starts to get a bit complicated then the stations are halved and then quartered. I have no desire to upset you , but this question has come up so many times that it's become a bit repetative. Why not try cutting out the station profiles and just slide them along the "backbone" until the lines become "faired"?  Obviously the leading edges (at the front) will have to be champhered (and the reverse at the back end). But please never again confuse "frames" with "stations". BY.

[chingdevil]

Hi Bluebird

In the description of the tug I have seen it states the tug is 26.5 metres overall, slightly longer than what the drawing states this could be due to the large rubber fender fitted to the back of her. The picture is a screen shot from the drawing, as you can see the water line length is less than the overall length

[chingdevil]

Thanks to everyone who gave advice on my drawing problem, a very big thank you to Malcolm Reade who put the dimensions on the drawing for me and showed me what I could not see for looking.


Brian