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  #41  
Old 03-09-2022, 07:16 AM
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Quote:
Originally Posted by mbauer
I have some seriously expensive photo paper. Slickrock Metallic Silver 300 is super expensive and weighs 300gsm while the cardstock weighs 162gsm.

What would I want to use this heavy stuff for?

Well for only a few parts, the Apollo spacecraft, the CSM and Stabilizer Fins, plus engine bells.

Why would I use this $4.65 per 11"x14" size sheet?

Check out the photo for this answer. Yes, it is Paper and ink. You can see standard cardstock version in the background. There is no gloss coating on the paper, it is just paper and ink-same color as background version-this photo paper really is some cool stuff.

Mike
That looks fantastic, Mike!
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  #42  
Old 03-09-2022, 07:38 AM
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Mike, when my son built his cardstock Little Joe II, we printed a template and he built the tower lattice with wooden dowel stock. With your models being much larger than the usual 1:100, it won't be hard to build the towers and you can roll the escape motor, skirt, and NC with paper.
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  #43  
Old 03-09-2022, 10:08 AM
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Very impressive, especially being cardstock.
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  #44  
Old 03-09-2022, 08:52 PM
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Default Escape Towers

Quote:
Originally Posted by tbzep
Mike, when my son built his cardstock Little Joe II, we printed a template and he built the tower lattice with wooden dowel stock. With your models being much larger than the usual 1:100, it won't be hard to build the towers and you can roll the escape motor, skirt, and NC with paper.

Yes, you found my weakness. Haven't done very many of the escape towers. My air rockets wouldn't go very high with them. This is the main reason all the staging system and details are drawn on my rockets, not an actual part like the Estes version.

I do have a 1/12 size Mercury Redstone Tower. Just haven't posted anything on it. Used lollipop sticks to make. Buy them in different lengths, diameters from any place that sells candy cooking supplies.

The Saturn Apollo Tower is fairly easy to design. I'll look into it once these two fly, and after I do a Saturn 1b, get my 6ft long F104-Starfighter finished, half done, the Sonex Jet project flying. Oh, Jason (Blackshire) is getting me going on my old wind turbine project, been bugging me about thoughts he has on how to get past a couple of hurdles. He's right. If I can get past them, it has the highest priority. Will be ready for production.

Need a perfectly balanced 2" wide per side equal triangle shaft 3ft long with centered 3/4" round shaft at the ends.

Final hurdle is a UV protectant for a type of paper that nobody has a product that will stick to it.

I found some superglue that does, and has been working since 2010 when the prototype was built. Still have it.

Yupo Synthetic Papers gave me a full pack of the paper when I told them what it was going to used for. Their engineering department even helped with the look for the UV protectant.

Jason mentioned the color black on a shade or shroud/augmenter. Black got me to think of something else. Black Primers might stick, then UV on top. Worth a try. UV sprays I tried all peeled off within a week. Primers are different though.

Mike

Last edited by mbauer : 03-09-2022 at 09:27 PM.
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  #45  
Old 03-09-2022, 09:19 PM
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Quote:
Originally Posted by ghrocketman
Very impressive, especially being cardstock.


Thanks!

Should say that the Slickrock is a very high end Photo Paper.

Hoping they fly.

Mike

Last edited by mbauer : 03-09-2022 at 09:35 PM.
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  #46  
Old 03-10-2022, 11:33 AM
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As long as you have the CG/CP relationship correct they should fly.
Drag will be a huge limiting factor trying to fly on a little D12 though.
If you have to stick to Estes BP power, I'd cluster 4 D12's minimum.
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  #47  
Old 03-10-2022, 12:21 PM
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Quote:
Originally Posted by ghrocketman
As long as you have the CG/CP relationship correct they should fly.
Drag will be a huge limiting factor trying to fly on a little D12 though.
If you have to stick to Estes BP power, I'd cluster 4 D12's minimum.

A D48 doesn't match well with thin paper rockets unless you're into RUD's.
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  #48  
Old 03-10-2022, 04:54 PM
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Default D Size Limits

Quote:
Originally Posted by ghrocketman
As long as you have the CG/CP relationship correct they should fly.
Drag will be a huge limiting factor trying to fly on a little D12 though.
If you have to stick to Estes BP power, I'd cluster 4 D12's minimum.


Agree on the D limits.

That is why the smaller lighter one is getting built. The larger one I have some E12-4 that I plan to use-almost 4-ounce safety factor.

Then time to cluster. Liked the C sizes you mentioned earlier.

Mike
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  #49  
Old 03-10-2022, 05:02 PM
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Default Thin Shell

Quote:
Originally Posted by tbzep
A D48 doesn't match well with thin paper rockets unless you're into RUD's.


Yes, you are correct.

Basically the shell is just a wrap. To make the wrap work, there are round 3/16" foamboard bulkheads to maintain the round shape. A total of 5. Three for Stages 1& 2.

One in the middle of the reducing cone to Stage 3, a final one 4.5" from the top of Stage 3 to create space for a parachute.

The upper LM Shell and CSM have a cardstock bulkhead in each to help maintain their shape. Connected by a center tube. Strong and lightweight.

The main body of the rocket "oil-cans" when you lift. Easiest way to carry is by gripping the third stage bulkhead area.

The fins are balsa wood and inserted into the bottom bulkhead before gluing.

On the larger model will be adding a fourth bulkhead to Stages 1&2.

Been taking plenty of photos while building. Plan to do a full build thread once they fly.

Mike
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  #50  
Old 03-10-2022, 09:59 PM
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A 3xC5-3 or 4xC5-3 cluster may work well.
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