Author Topic: Glenn Cauley's build of U-505 (Turm IV refit)  (Read 15355 times)

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Offline GlennCauley

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #30 on: 25 Feb , 2014, 09:49 »
Question: How are you going to do the saddle tanks?

The saddletanks tops bridge the gap between the outer hull and the curve of the pressure hull. 
After I drill out the flooding channel holes, there will be a bottom "lip" probably 0.040-0.060" thick... that is what I will glue the edge of the saddletank top to.   So the top of the plastic will be in line with the bottom edge of the flooding channel.

I'll see if I can make a picture to better illustrate this.   :)
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline GlennCauley

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Making PH sections 'Stern' and 'A-B'
« Reply #31 on: 25 Feb , 2014, 10:15 »
I will be posting instructions for making the various pressure hull sections.

Materials needed:
  • 0.080" sheet styrene (for rib)
  • 5/16" plastic rod - hollow  (#230) (for spine)
  • 0.060 x 0.120" plastic strip  (for shelf)
  • 0.010" sheet styrene (for skin)
Tools needed:
  • circle cutter
  • plastic scriber
  • 5/16" drill bit
  • small drill bit (pilot)
  • sprue cutters
  • fine-graduated rulers (0.5mm inc.)
  • fine-tip marker
Here are instructions for making the following pressure hull section:
Hope this helps!
« Last Edit: 25 Feb , 2014, 11:41 by GlennCauley »
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline dbauer

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #32 on: 25 Feb , 2014, 10:24 »
 ;) Sounds good Glenn!
When you are able, please post that on your U-505 site. I am not able to download your last part.
thanks,
Dan

Offline GlennCauley

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #33 on: 25 Feb , 2014, 12:10 »
When you are able, please post that on your U-505 site. I am not able to download your last part.

Done... the instructions for 2 pressure hull sections are now on my U-505 build site, in the "Pressure Hull" section under "Plans."
However, they are incomplete; I still have to complete those sections by adding the thin styrene 'skin' to them.
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline GlennCauley

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Circle cutter
« Reply #34 on: 25 Feb , 2014, 12:46 »
Here is the tool I use for cutting circles in sheet styrene.
It's fairly easy to set and use.

Mind you, the onboard 'scale' is totally useless, and I always set the radius using a good ruler.
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline GlennCauley

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Saddletanks
« Reply #35 on: 25 Feb , 2014, 14:15 »
Question: How are you going to do the saddle tanks?

The saddletanks tops bridge the gap between the outer hull and the curve of the pressure hull. 
After I drill out the flooding channel holes, there will be a bottom "lip" probably 0.040-0.060" thick... that is what I will glue the edge of the saddletank top to.   So the top of the plastic will be in line with the bottom edge of the flooding channel.

I'll see if I can make a picture to better illustrate this.   :)

Here is a picture that should clarify what I intend to do.
« Last Edit: 25 Feb , 2014, 14:20 by GlennCauley »
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline dbauer

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #36 on: 25 Feb , 2014, 15:47 »
 ;D Thanks Glenn!
I have to admit I was scratching my head at first. Now It makes sense!
Thanks,
Dan

Offline GlennCauley

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #37 on: 25 Feb , 2014, 20:01 »
That's the easy part.   LOL

Then I have to add all the thin vertical baffle ribs in the flood channel (atop the saddletanks).   
The main flooding channel is made up of a whole bunch of 1" long slots, but each of those big slots is divided into thirds by the internal baffle ribs.  All those have to be added. 

Gonna be lots 'o sheet styrene used up on this puppy.    :P
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline SmallRivets

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #38 on: 26 Feb , 2014, 07:16 »
Glenn,

all this internal structure "ribs" can be photo-etched in fact. are you going to make set of drawings for it?

Boris

Offline GlennCauley

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Re: Glenn Cauley's build of U-505 (Turm IV refit)
« Reply #39 on: 26 Feb , 2014, 07:59 »
Hi Boris,

No, I just make up adhoc drawings for things as I build.   Even the 'drawings' I am currently making and posting leave a lot to the imagination, and there will still be a lot of adjustments and filling/sanding to be done to make them fit on the actual model.  :D         I don't have the time and/or resources to make accurate drawings of the internal ribbing... considering too that I am not making a cutaway model, I just want things to look as good as they can given the limited amount they can be viewed.
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca

Offline johnd

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Pressure hull idea
« Reply #40 on: 26 Feb , 2014, 10:02 »
Glen, after adjusting the plans in Vom Original to 1/72, I will be using a segment of 2" Schedule 40 PVC pipe for the top of the pressure hull where it is a uniform diameter. The outside diameter of the pipe is 2-5/16 inches approx., which is very close to the drawings. Two foot lengths can be bought at Home Depot for around $5. Fewer bulkheads would be required and the pressure hull would be more stable to work on. On the other hand, weight may be an issue but the segment would only have to be a couple of inches wide. Just an idea, what do you think?
 
John Doherty

Offline GlennCauley

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Re: Pressure hull idea
« Reply #41 on: 26 Feb , 2014, 10:46 »
Hi John,

Yupper!   Ideally it would be great to find lengths of commercially-available plastic piping that can be pieced together... instead of making a skeletal structure with skin.  You're absolutely right... having pieces of solid tubing would be MUCH more solid to work with.

When I made the pressure hull for U-673, I too based a lot of my drawings on reference material books.  However, here's the big catch:  The inside of a plastic hull is nowhere near the proper dimensions compared to original.  The kit hull is made for reasonable accurate exterior finish & dimensions... they could care less about how the inside looks.     By the end with U-673 I had to make a lot of adjustments to the 'ribs' to make the pressure hull fit within the kit hull.     You may experience the same issues using different approaches.

In the end, it all comes down to making the best structures in the easiest possible manner with readily-available materials, so that others may follow and improve upon it.    I will be very happy if someone comes up with easier ways to do this stuff!   LOL

I settled on the 2" OD acrylic pipe between bulkheads B & C because it fits *exactly* inside the kit hull and matches the curvatures of the bulkheads... I totally lucked out on that!
« Last Edit: 26 Feb , 2014, 12:31 by GlennCauley »
Glenn Cauley
President, IPMS Ottawa
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Offline GlennCauley

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Goal of pressure hull sections
« Reply #42 on: 26 Feb , 2014, 12:27 »
Here's where I'm going with these pressure hull "sections" :
« Last Edit: 26 Feb , 2014, 12:31 by GlennCauley »
Glenn Cauley
President, IPMS Ottawa
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Offline GlennCauley

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Plans updated & posted !
« Reply #43 on: 27 Feb , 2014, 11:36 »
Here ya go, folks...

On my U-505 build site, I have posted all the latest files for creating the inner pressure hull & saddletank tops.

This includes:
Remaining (which will take some time):
  • building other internal structures like RIBBING, below-deck stuff, etc.
Enjoy!   ;D
« Last Edit: 27 Feb , 2014, 12:42 by GlennCauley »
Glenn Cauley
President, IPMS Ottawa
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Offline GlennCauley

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PE deck is in da house!
« Reply #44 on: 03 Mar , 2014, 12:01 »
I received Oto's PE deck set recently, and only now am I able to pick my jaw up off the ground.
Whaaaaaaaaaa    :D

There is a LOT of stuff in this set, and many MANY fine details.
I will likely be using my resistance soldering station to put this deck together, that seems the best idea at this time.
Am working out my notes to complement the instructions.
The biggest thing to work out will be how to raise the (thinner) PE deck up to the level of the stock (thick) plastic deck, and provide some support underneath to prevent sagging.

Ahhhhh, the joys of planning a build!     ;)
Glenn Cauley
President, IPMS Ottawa
gc-scalemodels.ca