Colored outer skin with prepreg base


Colored outer skin with prepreg base
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CopSub
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posted 10 Years Ago HOT
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How would I go about making a colored (white) outer skin with a prepreg carbon fiber base.

I need the colored (white) outer skin because the black carbon fiber will absorb too much heat when traveling at MACH 1-2

The parts (nosecone and perhaps fins) will be used on a 5 meter long liquid fueled bi-propellant (ethanol and liquid oxygen) amateur rocket.

Rune Henssel
Copenhagen Suborbitals
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posted 10 Years Ago HOT
Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)Forum Member (34 reputation)
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Posts: 6, Visits: 26
ChrisR (24/04/2015)

The colour won't make a blind bit of difference in the terms you are talking about, it will all be about thermal conductivity of the materials and friction at those sorts of speeds.

The only time the colour will make a difference is heat absorption from the sun when up in the atmosphere , hence why composite gliders/planes are painted white most of the time.

A 2k urethane paint may be OK, something like Durpox white, with testing can be applied directly to the mould during layup but I don't know what it's temperature limit is.



What can I say, I am a practical smurf and not a wiz at the physics part Smile

I will make some tests with different techniques (painting, gelcoat, "self tinted epoxy", etc...) and figure out what works best.

Rune Henssel
Copenhagen Suborbitals
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Colored outer skin with prepreg base
CopSub - 10 Years Ago
     paint or vinyl stickering?!
matthieutje65 - 10 Years Ago
             I don't think that neither paint nor vinyl stickers will be happy at MACH 1 even less so at MACH 2...
CopSub - 10 Years Ago
     https://www.easycomposites.co.uk/clearpol-iso-npg-clear-polyester-gelcoat This? Just use pigment...
panda - 10 Years Ago
             Thanks, my eyes had missed that one.
CopSub - 10 Years Ago
     I have no idea but putting ideas out! The guru's might know BUT could you spray the finished body...
VVS - 10 Years Ago
             [quote][b]VVS (23/04/2015)[/b][hr]I have no idea but putting ideas out! The guru's might know BUT...
CopSub - 10 Years Ago
     The colour won't make a blind bit of difference in the terms you are talking about, it will all be...
ChrisR - 10 Years Ago
             [quote][b]ChrisR (24/04/2015)[/b][hr] The colour won't make a blind bit of difference in the terms...
CopSub - 10 Years Ago
     As stated (Som skrevet står .. :D ) the outside colour of the Nosecone or other surfaces will have...
Dravis - 10 Years Ago
             This stuff looks interesting http://www.buyaerogel.com/
ChrisR - 10 Years Ago
             [quote][b]Dravis (24/04/2015)[/b][hr]As stated (Som skrevet står .. :D ) the outside colour of the...
CopSub - 10 Years Ago
     Nah, I was not thinking a solid foam core, just a foam core layer between an outer and inner "skin"...
Dravis - 10 Years Ago

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