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[Edmund]

  Thanks Ian, looking at the pics again I think they are plumb.

Ed

[Edmund]

  Hello (again)

On a model is it done the same way as below on the real thing then?  Where the little tapered liner is does that just fill with glue I spose?  It will be very tiny.

Oh and would the lap joint be between frames please , not fastened to the frame ?

thanks, Ed.

[Edmund]

  Hello, just received details from NMM about plans for these boats, can someone please tell me if a shell expansion plan would show the bottom of the hull too ? or just the sides

thanks ,
Ed 

[dreadnought72]

The shell expansion should show the plates from keel to gunwale. There's a photo of a chunk of the one I had, here.

Andy

[Edmund]

  Thanks, I will send fer it then.

Ed.

[Edmund]

Well me plating expansion plan came this week, very interesting stuff, just need to figure it out now  In particular the propellor tunnels look very confusing.
Does anyone please know how to convert plate gauge in Lb's per square foot into a thickness in inches etc? they are all given as 8lbs , 10lbs etc on the plan

  ta, Nick.

[Bryan Young]

Edmund, dear soul. You have been given more advice on plating a ships hull than the average real ship builder needs. And you still want more! It's all well and good asking about plate density and so on, but do you not think that a University "think tank" may be more suited to your needs, as opposed to a forum that builds "model" boats with scant regard to the actual density of the steel plating. I could well be very wrong here, and if I am then I apologize, but I think you are "milking" this, and just doing a "wind-up". There are many books on the subject of plating. I suggest you go out and buy one. BY.

[dreadnought72]

Hi Nick,

A plate thickness is listed in pounds-per-square-foot. So an 8lb plate masses 8 lbs per square foot. How thick's that?

Thickness in inches = 0.0245 * number of lbs

... About a fifth of an inch.

Andy, not being Bryan Youngish 

[Edmund]

Thanks Andy, that's all I wanted to know a formula, I read somewhere that 10lb  was  ¼" thick so this tallies.  Ed.

[BarryM]

Nick,

The Imperial figure a Naval Architect would use for mild steel is 490lb/cub. ft.  Knowing that, you can calculate the thickness for any given steel weight.  8lbs/sq.ft. is indeed for all practical purposes 0.2" and 10lb/sq.ft is 0.25".

Having said that, the only people for whom this is relevant are shipbuilders/repairers who want to quote on a job or for naval architects performing stability calculations. At our scales, I would argue that differences in plate thicknesses are marginal and, I would suggest, that in most cases 'if looks right, then it is right'. Trust your instincts and your eyeballs.

Hope this helps,

Barry M (Definitely not Victor Meldrew)