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  #11  
Old 02-27-2017, 11:02 PM
vcp vcp is offline
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I like that last image for the view of the black/white split on the hold-down.
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  #12  
Old 02-28-2017, 10:01 AM
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Quote:
Originally Posted by luke strawwalker
What are the David Weeks drawings??



http://www.realspacemodels.com/draw...-1b-drawing-set

I'll have to dig out my I-65 rest area pictures. Forgot about those...


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  #13  
Old 02-28-2017, 10:06 AM
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Quote:
Originally Posted by vcp
Ok, I did all my todo items, and tweaked a bunch of stuff; view of the results attached.

While I can't go there and make measurements, what I do, after getting basic measurements, is to position the 3D view to match the photograph. Then I can size and position the details to match. TLAR method = That Looks About Right. Until someone goes and measures the diameters and positions of the rivets, it works pretty well.

Next, I intend to split the components of the fin, so that it can be 3D printed.

I have the Weeks drawings, and they show very little detail or measurements of the hold-down.



Your model is likely good enough for what I need: 1/70th or maybe even 1/100th scale.

There is talk around here about a 50th anniversary celebration for Apollo 7 and I am looking at 3D printing some sets of fiddly bits for the centerpiece models if we do that again.


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  #14  
Old 02-28-2017, 02:27 PM
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I dug out my David Weeks Saturn 1b drawings and these are the only two drawings
he shows of the hold downs.
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  #15  
Old 03-03-2017, 06:14 PM
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Quote:
Originally Posted by Bill
Your model is likely good enough for what I need: 1/70th or maybe even 1/100th scale.

There is talk around here about a 50th anniversary celebration for Apollo 7 and I am looking at 3D printing some sets of fiddly bits for the centerpiece models if we do that again.


Bill


3D printing would have been a big help back when I was doing one of the A7 40th builds. I made "an attempt" to scratch a good set of pieces in plastic for one hold-down, using photos of the rocket garden display from KSC, then doing an RTV mold from that. Took a few more than eight casts before I got a suitable set...

I don't know which would be easier, if you go the 3D print method -- creating a 1-piece hold-down and brace assembly, or multiple pieces to be glued together. Saying they're "fiddly bits" is an understatement...

Consider printing the whole fin, too. It's not the easiest thing to build up eight identical fins from balsa and cardstock. That was nine years ago this year (incredible!), and today my 55-year-old fingers just don't flex like a kid's fingers anymore, popping and snarling if they come near anything that small. I made a master fin for that build, too, and they came out nice except for the very tip. Putty and sanding sticks...
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  #16  
Old 03-08-2017, 09:12 PM
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I have some images that may be helpful . . .

Dave F.
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  #17  
Old 03-08-2017, 09:21 PM
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Several more . . .

Dave F.
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  #18  
Old 03-08-2017, 09:39 PM
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Still more pics . . .

Dave F.
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  #19  
Old 03-08-2017, 09:57 PM
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Best I could do on short notice . . . I have tons more of data, but it would take time to sift through it . . . ENJOY !

Dave F.
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  #20  
Old 03-12-2017, 12:03 PM
vcp vcp is offline
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Thanks, those pics are great. I had already used a few of those for my CAD model but I see a couple of new details that can improve it.

BTW there's this: www.apollosaturn.com The author says it's just back on the line. Lots of good Saturn photos.
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