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Topic review - USS Oklahoma City CLG-5
Author Message
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Rick,

Thanks for the photo. I'll add it to my Cleveland class collection. I knew the different crane types existed, but hadn't studied them enough yet to realize the yard differences. There were a lot of other differences between the 27 Clevelands that were yard specific.

And thanks everyone else for the comments. I am interested in everything about the Clevelands, and not just the CLGs.

Phil
Post Posted: Sun Oct 06, 2019 10:57 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Interesting stuff - is there a specific designation for that type of crane? All the plans I've seen just show "stern aircraft crane" and no specific mark/mod or other designation.

Sorry for slight derail of your thread here Phil.
Post Posted: Sun Oct 06, 2019 7:49 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Ian Roberts wrote:
Interesting that CL-82 has the type of stern aircraft crane usually seen aboard the Baltimore class cruisers?

All 6 Cleveland class units built by Bethlehem Quincy had that type of crane. CLs 64, 65, 66, 67, 82, and 83. Among the Clevelands, this was unique to that yard.
Post Posted: Sun Oct 06, 2019 4:10 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
As I think I have stated before, the USN was trying out several radars during the 1940's prior to the Korean War that were in development at the end of the war. Some of the "new" radars were installed on Carriers, but many were installed on cruisers. The "winners" ended up being serially produced and installed across the fleet.
Post Posted: Sun Oct 06, 2019 1:18 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Great photo (as usual). Interesting that CL-82 has the type of stern aircraft crane usually seen aboard the Baltimore class cruisers?

As a 'radar fit guy' I could stare at these photos for hours!
Post Posted: Sun Oct 06, 2019 12:53 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Phil,

Here is an image I thought you may find interesting. It isn't the greatest photo ever taken, but it does illustrate the variation seen in the radar and RCM suites of the CLEVELAND class cruisers in the late 1940's when they still carried seaplanes.

I need to correct the caption; Should be USS PROVIDENCE (CL-82), USS LITTLE ROCK (CL-92), and USS PORTSMOUTH (CL-102).

Someone got too cute assigning three cruisers all with the last digit of "2" AND being ten numbers apart. :big_grin:

Image
Post Posted: Sun Oct 06, 2019 12:37 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Well, this is going to take a while. This morning the 2D file was 11% complete - it would take about eight days more to finish!

I aborted and started over. The forward radar tower (only) took just under 12 hours to finish. Considering that I want port, starboard, front and aft views, it will be months before the initial drawings are done.

Phil
Post Posted: Fri Dec 07, 2018 11:55 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
I started today to create a fully detailed 2D starboard broadside drawing of the forward superstructure (a 312 Mbyte 3D drawing). The program will save 2D drawings from 3D files, with hidden line removal. I have done some of this before and I knew that the resultant 2D files can be 10x the size of the 3D files - lots of duplicate lines. All those pipes and cables produce bazillions of short line segments. I can also have duplicates removed during the 3D to 2D process, but experience has shown me that this can be a bit too aggressive and necessary lines are also removed.

My normal procedure is to create the 2D file and use it as a template drawing that I trace over on new layers, allowing me to select the lines I want and ignore others. Then, after the trace over is complete I delete the original 2D output from the 3D drawing to reduce file size. It is a lot of work, but I get really good 2D drawings this way.

But ...

I started the 3D to 2D conversion at 1:00 PM this afternoon. It is now just about 7:00 PM, and the program says it is 3% done! At this rate it will take 200 hours (8.3 days) to complete! And this is just one of dozens of 2D drawings I want to make. I'll let it run overnight and see how far it gets.

I may have to do this in many parts, little bits of 2D drawings that I piece together later.

Phil
Post Posted: Thu Dec 06, 2018 9:55 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Fantastic achievement :D

So.. next step - detail drawings?! Can only be a hundred thousand or so parts to draw up in there.... :)
Post Posted: Thu Dec 06, 2018 4:33 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Michael,

I'm not sure it will ever be finally finished. I keep seeing a few more details I could add. There is always the helicopter ...

But for now I am stepping back and starting to plan the build of a 1:96 scale real model.

Phil
Post Posted: Thu Nov 01, 2018 11:18 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Phil,

Since the Oct 2 "FINALLY" posts, we have been waiting and watching and hoping for the "...but just one more little thing..." that might herald a resumption of the project, but a month has gone by and it is starting to look like the project is really, really, really done. Can it be?

It is the core thread of this forum. We are all going to be a little lost without it. Congratulations and thank you again for your brilliant, inspired and relentlessly accurate work! Beginning to end, year after year: the CAD masterpiece. Michael
Post Posted: Thu Nov 01, 2018 11:11 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Fabulous work here. I've followed this for several years now and this project has always really inspired me!
Post Posted: Wed Oct 03, 2018 7:40 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Congrats on your results, those renderings look great :thumbs_up_1:
Post Posted: Wed Oct 03, 2018 6:11 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
This is incredible, and what an amazing reference you've created. Congratulations on this accomplishment. The great ship lives again!

Jodie Peeler
Post Posted: Wed Oct 03, 2018 5:21 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Congratulations!

This is really an impressive 3D model! And for sure a very helpful resource for building the model!
Post Posted: Wed Oct 03, 2018 12:09 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
FINALLY!!!!

It's done (mostly)! Here are images of the finished CAD model of the USS Oklahoma City CLG-5 in the configuration of the summer of 1971. After 14 years and many hundreds of hours the model is basically finished. I need to add the SH-2 Seasprite helicopter, and I suppose there are still some small details I will discover, but it is good enough to start on the drawings for the 1:96 model.

These images are composites of four images for each view angle - the hull and the forward, midships and after superstructures. I pasted them together in Photoshop. I still haven't combined all four files into a single whole ship file - that will be several days work. Generating images from the whole ship file will take many hours.

The four files add up to 1.071 gigabytes, but there are a few overlapping elements in the superstructure files that will be removed. The whole ship file will be still be about a gigabyte. There are 2.86 million objects in the files, and a bit more than 22 million points. You can find many more detail images here:

https://www.okieboat.com/CAD%20model.html

Phil

PS: Before anyone gets excited about creating 3D prints from the model, keep in mind that almost all of it was created with zero thickness surfaces that will not print, and not solids. The model can be used to create real solids that would print, but that would take more years of work.


Attachments:
ship stbd beam small.jpg
ship stbd beam small.jpg [ 132.28 KiB | Viewed 439 times ]
ship port quarter small.jpg
ship port quarter small.jpg [ 119.65 KiB | Viewed 439 times ]
ship stbd quarter small.jpg
ship stbd quarter small.jpg [ 134.11 KiB | Viewed 439 times ]
ship stbd bow small.jpg
ship stbd bow small.jpg [ 136.9 KiB | Viewed 439 times ]
ship bow stbd small.jpg
ship bow stbd small.jpg [ 134.85 KiB | Viewed 439 times ]
ship stern small.jpg
ship stern small.jpg [ 124.87 KiB | Viewed 439 times ]
Post Posted: Tue Oct 02, 2018 11:08 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
P. R. Dobson,

Thanks. I didn't have any CAD tools for cable routing, and it was (is) tedious!

I have seen your CAD model of the KGV and it is excellent. You started on it in 2004, the same year I started on the OK City model. It has been such a long and continuous part of my life I don't know what I will do when it is actually finished!

P. R. Hays
Post Posted: Sun Sep 16, 2018 12:53 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Here are some images of the (almost) finished after deck house that sat on top of the missile house. The deck house, missile house and launcher file is 303.89 megabytes, with 917,261 entities and 6,839,679 points.

I say almost finished, because I thought it would be finished after I reworked the SPS-30, AS-979 and AS-791 antennas. But while I was on the ship I took some black and white photos specifically to capture details in case I someday wanted to create a model of the ship. I forgot about these pictures and the negatives were hidden away in a foot locker in the garage until a few years ago (after the original aft deck house 3D CAD model was completed). Now I have scanned them and I used them for the latest antenna updates. But I noticed a few more details missing from my model while I was placing the revised antennas on the after tower. So I guess there will be one more round of scrutinizing these photos to fill out the details on the after deck house.

But I am getting closer to being finished! Really!!

Phil


Attachments:
aft deck house 11 Sep 2018 1 small.jpg
aft deck house 11 Sep 2018 1 small.jpg [ 140.12 KiB | Viewed 515 times ]
aft deck house 11 Sep 2018 3 small.jpg
aft deck house 11 Sep 2018 3 small.jpg [ 138.1 KiB | Viewed 515 times ]
aft deck house 11 Sep 2018 5 small.jpg
aft deck house 11 Sep 2018 5 small.jpg [ 141.19 KiB | Viewed 515 times ]
aft deck house 11 Sep 2018 6 small.jpg
aft deck house 11 Sep 2018 6 small.jpg [ 148.92 KiB | Viewed 515 times ]
Post Posted: Sun Sep 16, 2018 12:38 am
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
The SPS-30 did not carry an integrated IFF (Identification Friend or Foe) antenna as some other radar antennas did. An AS-791/UPA-43 IFF antenna was mounted on the aft tower platform close to the SPS-30 and slaved to it so it pointed in the same direction and rotated at the same rate. When the SPS-30 was installed in 1963 a different IFF antenna was installed, but it was replaced by the AS-791 by 1967. This model is approximate. The overall dimensions were taken from data sheets but the details came from some not-too-clear photos.
Attachment:
AS791-UPA43 IFF 1 small.jpg
AS791-UPA43 IFF 1 small.jpg [ 133.06 KiB | Viewed 516 times ]

Also on the aft tower platform was an AS-979/UKR telemetry antenna. I think, but I am not certain, this was the antenna that received telemetry information from Talos missiles in flight. Some missiles had telemetry packages installed that sent back detailed readings of multiple data streams for wing position, engine operation and proximity fuze target detection signals. All Talos ships had an AS-979 mounted close to the SPG-49 Talos target tracking antennas and SPW-2 Talos missile guidance transmitter antennas. The antenna had 12 ground plane elements radiating from the base and a helical antenna inside the truncated cone cover. The model is based upon photoguestimation from several photographs.
Attachment:
AS979 UKR antenna 1 small.jpg
AS979 UKR antenna 1 small.jpg [ 118 KiB | Viewed 516 times ]
Attachment:
AS979 UKR antenna 2 small.jpg
AS979 UKR antenna 2 small.jpg [ 103.62 KiB | Viewed 516 times ]

Here is a picture of the Oklahoma City aft radar tower with the antennas installed, in the configuration of mid 1971.
Attachment:
aft tower 11 Sep 2018 3 small.jpg
aft tower 11 Sep 2018 3 small.jpg [ 128.84 KiB | Viewed 516 times ]

The AS-979 telemetry antenna was initially (1963) installed in the same position on all of the Talos CLGs (USS Galveston CLG-3, USS Little Rock CLG-4 and USS Oklahoma City CLG-5), using the same platform extension on the aft side of the tower platform. Later (1974) on the Little Rock and Oklahoma City the AS-979 telemetry antennas were moved forward on the aft tower platform closer to the SPS-30 and another telemetry antenna was mounted at the AS-979's original position. The Galveston was decommissioned in 1970 before this change was made.

The AS-791 IFF antenna was mounted in different places on the three Talos CLGs. On the Galveston it appears to have been mounted on the main platform behind the SPS-30 when the '30 was installed in 1963. But photos from 1967 appear to show the antenna, or something like it, at the front edge of the midships radar tower. Unfortunately, all pictures I have seen have been low resolution and grainy, and it is not possible to identify these antennas with certainty.

The Little Rock had the AS-791 IFF antenna mounted on a platform extension at the starboard front of the aft tower platform. On the Oklahoma City it was mounted on a platform extension at the starboard rear of the aft tower platform, as shown in the picture above.
Post Posted: Sat Sep 15, 2018 11:56 pm
  Post subject:  Re: USS Oklahoma City CLG-5  Reply with quote
Exceptional! I well know how much of a chore cabling can be in CAD (especially if you're doing this without proper cabling and wire harness tools..?)
Post Posted: Tue Aug 07, 2018 1:15 pm

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