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Topic review - Calling all USS Iowa class (BB-61) fans
Author Message
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
chuck wrote:
Where did you get the strake diagrams?


I have to assemble that from a lot of data collected from different places. The mold loft data is frequently unreadable. 3s look like 5's. 6's look like 0s. So I have to do trial and error with data points. I have to debug the points.

Then I have to compare with other plans I have collected.

Attachment:
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From that I generated the diagram shown. I have not finished the entire hull.
Post Posted: Tue Mar 19, 2019 9:41 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Where did you get the strake diagrams?
Post Posted: Mon Mar 18, 2019 11:09 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
In what way is the plating asymmetric? Below or above the WL, for or aft etc? I noticed on Missouri that a different plating was "added" when the booms for the Jacob's ladders were removed. As Chuck pointed out, the internal arrangement is not symmetrical, though the depth of the side protective scheme would tend to reduce such necessity.


So far I have found that the C strake (below the waterline) is different P/S. The difference does not appear to be the result of an opening.

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Post Posted: Mon Mar 18, 2019 5:57 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
Unfortunately it's a matter of removing materials. Does this paint make my Battleship's ass look fat? Some can be added at the bow, but the stern requires major liposuction.


Yeah, and it’s not worth the aggravation. Now if someone were to make a 3D printed drop in place lower stern, that just involved cutting away the molded plastic at the waterline and just behind the #3 turret, and dropping in a new lower stern, then were on to something....
Post Posted: Mon Mar 18, 2019 5:20 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Unfortunately it's a matter of removing materials. Does this paint make my Battleship's ass look fat? Some can be added at the bow, but the stern requires major liposuction.
Post Posted: Mon Mar 18, 2019 4:37 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Having just compared the hull stern area below the waterline of the MENG Missouri to the Trumpeter & Tamiya models, I see now where people are saying the hull is off. Unfortunately my build is to far along to correct, and I wouldn’t attempt surgery anyways. I still think it’s close enough where most folks won’t be noticing.

It would be nice though if someone were to create some 3D printed “drop in place parts” to be glued onto the hull to create a more correct shape.
Post Posted: Mon Mar 18, 2019 1:20 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
In what way is the plating asymmetric? Below or above the WL, for or aft etc? I noticed on Missouri that a different plating was "added" when the booms for the Jacob's ladders were removed. As Chuck pointed out, the internal arrangement is not symmetrical, though the depth of the side protective scheme would tend to reduce such necessity.
Post Posted: Sun Mar 17, 2019 11:37 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
You are saying that the aft hull is asymmetric?


I discovered that the hull plating is not entirely symmetric—and I'm not talking about hull openings.

I have not figured out why yet.
Post Posted: Sat Mar 16, 2019 6:25 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
After a bit of brain circulation figured out what you were referring to. The mold for this hull must have cost many hundreds of thousands of dollars? Perhaps it is just scaled up as you say and CNC'd in a larger size?
Post Posted: Thu Mar 14, 2019 12:35 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
You are saying that the aft hull is asymmetric?


The shape of the hull is symmetric. My meaning is that the slope of the tunnel inside the twin keels is not the same as the the slope of the hull outside.

You can see on the Tamiya and Trumpeter kits that, if you cut the twin keels off, you'd have a constant hull curve upwards. On those kits the bottom of the twin keel is roughly the same width throughout. On the Iowas, the thickness gets much thicker forward and thinner aft.

Refer to the pictures I posted above of the kit and a computer image generated from the Iowa class plans. Compare the shape of the half siding on the baseline in the computer image with the same on the kit.

Here I have a sketch of the flat area at the bottom of the Trumpeter hull in read and below I have the actual shape of the flat area of the bottom of the Iowas as taken off the table of offsets.

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Post Posted: Wed Mar 13, 2019 10:27 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
All information I have shows the hull shape is symmetrical but around the skegs the shapes are complex. At the point where outboard shaft exits the hull, the hull side is straight and inclined above waterline and curved in a convex manner all the way to the keel below waterline. At the of the outboard screw, the hull side is curved continuously in a convex manner to near the level of the screw, when it transition to concave.

More subtlety, however, references say the orientation of the propeller shafts are not completely symmetrical. The two port shafts exits the hull at a slightly greater angle below horizontal than the two starboard shafts, and the port outboard shaft toes outwards slightly more than the starboard outboard shaft. This is caused by the fact that the turbines for the 4 shafts are located front to back in the sequence of starboard outboard, port outboard, starboard inboard and finally port inboard. So the shaft for each propeller Has a different different length to run to its turbine compared to its counterpart on the other side.
Post Posted: Wed Mar 13, 2019 6:14 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
The hull form lines as shown in "Garzke and Dulin" do not indicate an asymmetry. The original hull form was hollowed out the area in front of the outboard propellers after model basin testing.
Post Posted: Wed Mar 13, 2019 1:27 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
You are saying that the aft hull is asymmetric?
Post Posted: Wed Mar 13, 2019 12:15 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
BTW, this is why the Tamiya has the funny outlets for the outers shafts. Without it, the shafts would be way too long.

The basic misteak is these kits have assumed the upward slope is the same on either side of the twin keels.
Post Posted: Wed Mar 13, 2019 11:52 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Big job!! Good way to do it though.
Post Posted: Mon Mar 11, 2019 9:09 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
For anyone building the 1:200 plastic Iowa class kit, be especially aware of the incorrect below the waterline shape of the kit, especially aft, but also of the forward bulb area. To see how extensive the modifications are reference the NJ build by Hank Strub. If one is going to the extent of replicating the plating, you might as well get the hull contour right. This turned out to be a major project, but Hank's version of the ship during the time which he served on her is quite spectacular and I am sure he is glad he took the effort to correct the hull.

Thousands of hours get put into these ships and a good build often takes longer than the construction of the original, if perhaps only slightly less expensive.

Cheers: Tom



I kept the deck, the center 14 inches of the hull, and about 2 inches of extreme of bow and stern from trumpeter. I built up about 70% of the hull length using styrene plank on bulkhead method using FDD plans for bulkhead shape.
Post Posted: Mon Mar 11, 2019 8:57 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
For anyone building the 1:200 plastic Iowa class kit, be especially aware of the incorrect below the waterline shape of the kit, especially aft, but also of the forward bulb area. To see how extensive the modifications are reference the NJ build by Hank Strub. If one is going to the extent of replicating the plating, you might as well get the hull contour right. This turned out to be a major project, but Hank's version of the ship during the time which he served on her is quite spectacular and I am sure he is glad he took the effort to correct the hull.


It looks like the Trumpeter 1:200 kit hull shape is blown up from the 1:350 Tamiya. The twin keels are add-on's to the hull rather than being an integral part of the hull shape. That causes a number of problems, including the shafts being off.
Image
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Post Posted: Mon Mar 11, 2019 8:42 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
At this scale the paint and tape is good method!
Post Posted: Mon Mar 11, 2019 8:16 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
For anyone building the 1:200 plastic Iowa class kit, be especially aware of the incorrect below the waterline shape of the kit, especially aft, but also of the forward bulb area. To see how extensive the modifications are reference the NJ build by Hank Strub. If one is going to the extent of replicating the plating, you might as well get the hull contour right. This turned out to be a major project, but Hank's version of the ship during the time which he served on her is quite spectacular and I am sure he is glad he took the effort to correct the hull.

Thousands of hours get put into these ships and a good build often takes longer than the construction of the original, if perhaps only slightly less expensive.

Cheers: Tom


I added hull plate detail to mine using the tape & paint method, but didn’t do any hull shape corrections. To my eyes it looks close enough and not worth the effort to modify.
Post Posted: Mon Mar 11, 2019 5:32 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
For anyone building the 1:200 plastic Iowa class kit, be especially aware of the incorrect below the waterline shape of the kit, especially aft, but also of the forward bulb area. To see how extensive the modifications are reference the NJ build by Hank Strub. If one is going to the extent of replicating the plating, you might as well get the hull contour right. This turned out to be a major project, but Hank's version of the ship during the time which he served on her is quite spectacular and I am sure he is glad he took the effort to correct the hull.

Thousands of hours get put into these ships and a good build often takes longer than the construction of the original, if perhaps only slightly less expensive.

Cheers: Tom
Post Posted: Mon Mar 11, 2019 11:57 am

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