Banter: Eek..

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Eek..

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Forum Name: Banter
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Topic: Eek..

Posted By: lasergurl
Subject: Eek..
Date Posted: 07 Mar 06 at 7:19pm

Hey all..

I have this piece of physics coursework called "research and report" in which we can choose any subject.. so being of the water world.. I have chosen to study the Type 42 Destroyer since I was told "Warships" was a bit broad and somebody else has decided to do sailing.. but... when it came to choosing what areas of physics I would study... I realised.. I don't actually know what material the hull of a Destroyer or any Royal Navy Warship is made of. I considered steel but I'm really not sure and was wondering if anyone knew for definate??

Secondly.. we have to study an area of physics we don't know much about and whilst wikipedia is amazing for most things.... does anyone know anything about hydrodynamics and would anyone be willing to explain a few areas to me? I'm finding wikipedia slightly difficult to understand.

anyone? I'm stuffed if I don't include this area of physics. :(

help. Please?

Emma

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Replies:

Posted By: phantom_iv
Date Posted: 07 Mar 06 at 8:25pm

I've done a bit of fluid dynamics, enough to know that if the wikipedia article on it is difficult to understand, there's probably a reason for that!

Steel seems a safe bet for the hull.

Posted By: CurlyBen
Date Posted: 07 Mar 06 at 9:07pm

I guess this is the Physics AS coursework? Th name of the report sounds familiar. The hull might not be steel, there are some made from aluminium, caused quite a problem in the Falklands (aluminium + salt water = big fire!) but I can't remember the class, I can probably try and dig up some info. Also worth thinking about is we were told not to use Wikipedia as a trusted source as it can be edited by anyone and isn't reviewed by a expert. I still used it to help me understand stuff/find out what to research but didn't rely on it being accurate. Any particular bit of Type 42s you're interested in?

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Posted By: lasergurl
Date Posted: 07 Mar 06 at 9:49pm

Very close guess. it's the A2 piece, the final piece now ... yay!
The main thing I was struggling with was the materials on a Type 42. I couldn't think of any despite having been on them so many times. It's just not something I thought about really.
I believe one or two classes were aluminium but have since been decommissioned. I was fairly sure it was steel and think I will email Swan Hunter or Vosper Thornycroft to find out what grade, if indeed it is steel used.

Thanks fo r the advice on Wikipedia Curlyben. will ensure I verify what I read.

Phantom_iv can I ask what fluid dynamics you've done??

many thanks for the replies *yay*

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Posted By: phantom_iv
Date Posted: 08 Mar 06 at 12:37am

http://www.alfed.org.uk/templates/alfed/content.asp?PageId=1 11

Aluminium alloys were used in the superstructure of some ships, not in the hull. Type 42s have steel superstructures and hulls.

As for the fluid dynamics, I did a course on it last year as part of my degree. It wasn't a huge amount, but seemed like it as there's only so much vector calculus I can do and still preserve the last tattered shreds of my sanity.

Posted By: Bumble
Date Posted: 08 Mar 06 at 4:58am

Try looking at

http://www.foils.org/Archives.html - http://www.foils.org/Archives.html

Full of info.

Posted By: Chew my RS
Date Posted: 08 Mar 06 at 8:34am

T42 hull is steel. Not sure I can reveal the material properties like yield stress, but its not the highest grade. Some more recent RN vessels use higher grade steels steels. If you can get them, there are a series of Defence Standards that would help esp DefStan 02-791. Try http://www.Defstan.mod.uk - www.Defstan.mod.uk , which is public access, or Dent Steels website for general steel info.

Is there a specific hydro question you have, or just a general desire to know more?

Posted By: lasergurl
Date Posted: 08 Mar 06 at 4:47pm

Just in general. we haven't studied it really. I've studied the gas laws like pressure so that's not so bad but just resistance of water and how it affects things. sorry it's vague. I'm not sure what to look for in it at the mo

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Posted By: lasergurl
Date Posted: 08 Mar 06 at 4:48pm

and thank you :) webs were gooooood :)

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