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Old 04-19-2021, 12:38 PM
markcable markcable is offline
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Got a few tricks I use I'd be glad to share.

1. I use the petal method on my own designs, but there's a little cheat that helps with the shape. At the base of the cut on each side of the petal, I add a horizontal slice across the point where the petals meet. it looks like this:



The orange lines represent the cuts. Sorry, crappy drawing. My models look much better than this.

Another trick I use is to apply thin CA glue to the rounded part and sand smooth when dry. I did that with my North Korean HS-16, but the structure uses both stepped cones and petals:


Once the CA soaks into the paper fiber and dries, it becomes hard like plastic, so it can be sanded. Then, I painted the nosecone. This also works to strengthen load bearing structures like the engine truss at the bottom of a Titan or the lattice work between stages on a Soyuz or Long March.
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Old 04-19-2021, 01:08 PM
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dhanners dhanners is offline
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I've also found these -- burnishing tools intended for dry transfers -- to be helpful in pre-curling petals. (Used with a computer mouse pad, of course.)
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How to make spherical shapes?(I'm new)-img_1012.jpg  
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  #13  
Old 04-19-2021, 06:36 PM
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Gil Gil is offline
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Assembly of open petal design tutorial download

Assembly of open petal design tutorial download:

This might help;

http://www.papermodelers.com/forum/v...le&fileid=3332



-Gil
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Old 04-19-2021, 09:12 PM
silverback920 silverback920 is offline
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Quilling, where you roll a strip of paper into a disc, then push the center of the disc downward to form a cone. Carefully work the various layers into a spherical shape then glue. This can be pressed into a dapping block of the appropriate size for a near-perfect sphere.
As mentioned, CA glue and sand for a super smooth surface.
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Old 04-20-2021, 03:09 AM
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Paper Kosmonaut Paper Kosmonaut is offline
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Quote:
Originally Posted by markcable View Post
Got a few tricks I use I'd be glad to share.

[there's a little cheat that helps with the shape. At the base of the cut on each side of the petal, I add a horizontal slice across the point where the petals meet.]

*Jaw drops* This. Is. Fantastic. Ten+ years in the hobby and I never heard that before. To me this is totally new. I never had much trouble with either petals or ring-shaped cones or balls but this little trick is genius. and increases the roundness of the cone significantly. Wow.
Thanks Mark!
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