USS Minneapolis C-13 - Page 4 - RC Groups
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Jul 31, 2017, 07:17 AM
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tghsmith's Avatar
laminated stock for the main cabin structure sides and ends, the armored bridge tube and cabin sub-deck.. the needed curved and tube sections were molded in or around waxed pvc pipe(the bridge tube will take a spin on the lathe to level it out) the hull will take a trip in the test tank to determine total model weight allowed..
Last edited by tghsmith; Jul 31, 2017 at 09:08 AM.
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Jul 31, 2017, 12:55 PM
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tghsmith's Avatar
a few strokes with a rasp to knock off the drips and high spots, chucked the pvc pipe in the lathe, a drill chuck in the tailstock made a great center cone.. a few tool passes and some fine sandpaper.. one razor saw cut to release the part from the tube.. this was fun.. , this way all the hull and main structures will be of the same materials (nothing should pop apart at a glue line later )
Jul 31, 2017, 03:20 PM
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mariner02's Avatar
Looks good- light and strong!
Aug 01, 2017, 07:09 PM
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tghsmith's Avatar
surfed a new to me photo, does show the deck plank joggeling..
Aug 03, 2017, 07:16 AM
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main cabin sides,ends and armored bridge tube joined to the main sub-deck,, gave everything a light sanding, rough sanding in areas where the hull half were joined.. shot it with a light coat of sanding primer to highlight spots that need filling or sanding.. some of the hull rail sections didn't cast well.. those will sanded flush and replaced with same half round plastic stock that was used on the master.. after a little more early topside work it will be time turn her over to get running gear and bilge keels installed..
Aug 04, 2017, 06:06 PM
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tghsmith's Avatar
bilge keels started, the balsa blocks are holding position of a fiberglass strip.. spot welded with CA. A fillet of resin with mixed with fibers and thickener.. once cured the blocks get knocked away and a coat of resin is added to the other side..
Aug 04, 2017, 06:28 PM
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Tim B.'s Avatar
You have come a long way !

Looks good ~
Aug 05, 2017, 07:13 AM
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Tigh,
Your work is inspiring. I don't know if these will help you, but the Smithsonian has the Hart collection of glass plate negative which are downloadable in huge files. They allow incredible resolution on enlargement. The link to the collection is: http://www.loc.gov/pictures/related/...=true&op=EQUAL

I found images on pgs 14, 26 and two on 36.
Jonathan
Aug 05, 2017, 11:37 AM
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tghsmith's Avatar
I've had them downloaded and copied onto CD's for while..
Aug 05, 2017, 03:38 PM
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tghsmith's Avatar
cleared a couple blocks just to check method..
Aug 08, 2017, 07:06 AM
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sub-decks were trimmed out this morning, roto-zip bit, dremel sanding drum and air powered nibbler.. (shop vac running and dust mask) bilge keels need final sanding.. the waterline will get marked and a trip to the test to figure displacement.. more 3D printed predred parts ..https://www.shapeways.com/shops/3dbo...14+US+Navy&s=0
can't thank this designer enough.. should really speed things up when its time to clutter the hull..
Aug 08, 2017, 11:51 AM
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she floats,, 18lbs 8oz puts her to what I would call max waterline.. looking at completed weight of around 15.5lbs to give a little room for trimming ballast.. everthing was good and dry inside so it time to put around 100 holes in the hull...
Aug 10, 2017, 03:44 PM
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shaft tubes made.. have to make a jig to solder the wing shaft strut unit.. the wing shafts are angled in to of the three planes.. should be "fun" little bit to get correct.. the closest pvc pipe for the curved sections of the oblong shape stacks was just a bit to small, made up a stack section with some and will use it as form to lay-up glass around,, will have to be neater this time as a quick spin on the lathe can't happen like the conning tower.. but should have nice light and strong stacks..
Aug 11, 2017, 11:20 AM
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mariner02's Avatar
Of course they couldn't have just gone with round stacks... had to be difficult.
Aug 11, 2017, 03:33 PM
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tghsmith's Avatar
its worse than that, the two ships of this class were first designed for three stacks, the minni ended up with two fat stacks while the columbia had four round slender stacks , going to need some good clean-up but the wing shafts strut unit got silver soldered today,, close to getting the shafts into the hull and building the rudder, tube and steering gear..


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