VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 04-25-2022, 04:46 PM
wirejock's Avatar
wirejock wirejock is online now
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,526
Default Carbon Fiber

Short version... The Air Bits plenum gel coat was chipping. It's all gone. Belt sander! I hate gel coat.
Since it's rough, I'm considering a layer of carbon fiber.
How do I get that beautiful glossy carbon fiber?
Is that urethane clear coat?
__________________
Larry Larson
Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
Reply With Quote
  #2  
Old 04-25-2022, 05:05 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 3,838
Default

Don’t use Peel Ply. Error on the side of more epoxy.

Carl
Reply With Quote
  #3  
Old 04-25-2022, 05:25 PM
thiggins thiggins is offline
 
Join Date: Mar 2020
Location: Saluda,NC
Posts: 130
Default

No expert here at all, but if you watch some of Mike Patey’s carbon fiber YouTube videos, he does use clear coat very often for that purty finish. Darned amazing skills he has there.

https://youtu.be/tqGnlFYAq1I

https://youtu.be/IycGsGzD16k
__________________
Donation 2022 paid
ASEL INST COMM Tail-wheeler
RV-12iS builder (Empennage complete, Wings complete!, Fuselage under way !, finish kit ordered, Garmin avionics ordered, engine order waiting for the global economy to be resuscitated...)
https://eaabuilderslog.org/?blproject&proj=7buPHH99v

Last edited by thiggins : 04-25-2022 at 05:34 PM.
Reply With Quote
  #4  
Old 04-25-2022, 09:48 PM
Taltruda Taltruda is offline
 
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 1,327
Default

I played with carbon a little, I found if you flood it with epoxy, it looks awesome! Probably not the lightest way to achieve your results. Perhaps there’s a UV resistant clear you could spray on?
__________________
Tom
Las Vegas
RV-4 flying…
RV-8 empenage finished 10-2020

Wings Started.. 11-2020
Reply With Quote
  #5  
Old 04-25-2022, 11:37 PM
Dan 57's Avatar
Dan 57 Dan 57 is online now
 
Join Date: Sep 2018
Location: LSZF
Posts: 1,040
Default

Laying the part in a positive form with enough epoxy.
Made an instrument panel for an older French Jodel this way, and it turned out pretty good, though not the lightest.
__________________
- ain't the Destination, but the Journey -

www.aerofun.ch

RV-6.9 #25685, slider, O-360-A3A (carb/dual Lightspeed II), MTV-12-B, HB-YLL owner & lover
RV-4 #2062 HB-YVZ airframe builder
Reply With Quote
  #6  
Old 05-14-2022, 10:26 AM
1001001's Avatar
1001001 1001001 is offline
 
Join Date: Dec 2014
Location: Just Minutes from KBVI!
Posts: 1,418
Default

Quote:
Originally Posted by thiggins View Post
No expert here at all, but if you watch some of Mike Patey’s carbon fiber YouTube videos, he does use clear coat very often for that purty finish. Darned amazing skills he has there.

https://youtu.be/tqGnlFYAq1I

https://youtu.be/IycGsGzD16k
One of the things that Patey does, I think, to get such nice looking carbon fiber weave is to pre-impregnate the cloth with resin. He doesn't explicitly show this step, but he's always applying sheets of cloth that are already wet. You can sometimes see him cutting the sheet from a larger sheet of cloth sandwiched between layers of plastic sheet, which he cuts with a rolling style cutter, usually.

That way, he's not stretching the fabric all over trying to squeegee resin into it while it's lying out on a curved surface, which will probably cause weird stretching and bunching. I'm no expert either, but from what I've seen some composite people do, it's all pre-layed up on a flat surface, impregnated with resin, and between two sheets of plastic to make the resin spread evenly, and make sure the cloth is all filled with no bubbles before ever laying it up into the final shape.
Reply With Quote
  #7  
Old 05-15-2022, 04:11 AM
penguin penguin is offline
 
Join Date: Jan 2005
Location: England
Posts: 1,148
Default

Its all a matter of technique. Use larger pieces of cloth than needed, wet out to the edge and cut back to avoid fraying. If bonding on top use peel ply. If finished part use plastic, but it is difficult to get the plastic to sit down flat if the part has any compound curve. Otherwise clear coat is required = a lot of extra work. Do not approach composite work with a metal mind set. Use more cloth than needed and cut back when still wet. Most composite parts that are not moulded are ground with a sanding disc to reach final size.
Reply With Quote
  #8  
Old 04-25-2022, 11:54 PM
Richard Connell Richard Connell is offline
 
Join Date: Aug 2006
Location: Sydney Australia
Posts: 405
Default

Quote:
Originally Posted by wirejock View Post
Short version... The Air Bits plenum gel coat was chipping. It's all gone. Belt sander! I hate gel coat.
Since it's rough, I'm considering a layer of carbon fiber.
How do I get that beautiful glossy carbon fiber?
Is that urethane clear coat?
One of the main challenges of getting this right is not distorting the weave while you fill it with (heavy) resin.
Two ways to deal with that, either try get hold of some carbon cloth with binder on one side, or brush a light coat of resin onto your surface and when it tacks off, lay your cloth down. As you progress to wetting it out it will now stay in place.

Once that layer has tacked, brush on another layer. Repeat until satisfied and then block it all flat. Clear coat if you like.
As Dan says, this won't be super light, but it'll look good.
Ive made a few bits this way.
__________________
Richard
RV7 VH-XRC Sold :-(
RV10 VH-XRK
Sydney, AUS
Reply With Quote
  #9  
Old 04-26-2022, 08:26 AM
wirejock's Avatar
wirejock wirejock is online now
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,526
Default Epoxy clear

Interesting. There's no UV inside the cowl. Maybe the clear isn't needed. Has anyone used West 207 on carbon fiber? It's a slow hardener but designed to harden perfectly clear. I've made some table tops with it. Time for some testing.
https://www.aircraftspruce.com/catal...xy2_207-SC.php
__________________
Larry Larson
Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.

Last edited by wirejock : 04-26-2022 at 08:36 AM.
Reply With Quote
  #10  
Old 04-26-2022, 09:07 AM
BH1166 BH1166 is offline
 
Join Date: Nov 2017
Location: Eatonton Georgia
Posts: 754
Default

Built a plastic plane years ago. To create some carbon items i took clean, scratch free safety glass, did layups on it, it popped off the glass after curing. Smoooth and shiny! Used same epoxy as all other tasks…nothing special.
__________________
Butch
RV6A Purchased N72TX
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 10:16 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.