Hey Dave, I have multiple experiences with manufacturing carbon fiber parts. I watched how you made it. It's one way to do it. BUT: You did it on the hard way ! What I always do is to lay down the complete carbon fabric onto a plastic film. No cutting before resin is on the fabric! Apply the fabric to a plastic film. Now fix the fabric on the film by tape all around the fabric. Now apply the epoxy resin onto the fabric on the film. The resin now sticks the fabric onto the plastic film. Now it’s time to cut the peece in that form and dimension you need. The fabric is fixed by the resin on the plastic film and the plastic film holds the fabric in perfect position. By this way of preparation you get yourself made “prepreg”. Now it’s time to bring the first layer of “prepreg” into or onto your waste body or your negativemould. When the position is correct and the wet fabric has contact to the surface of the mould, you rip off the plastic film. Now you can repeat this process layer by layer. This way of working is the professional way to do it. This way guaranties that the flat woven roving’s stay in a flat orientation and get not rounded. This way guaranties that the edges of each fabric part is not rabbled out. About me, I designed and produced the rigid wing IMPACT, made from carbon fiber as you can see on my channel. If you need more help and use easy ways of working with carbon and glas fiber you are welcome to ask me. Regards, Olaf from Hamburg
@greypvaus8343
3 жыл бұрын
A vacuum switch that is adjustable reduces the negative pressure to a level that will not destroy the part you are laminating. It is used similar to a thermostat which turns on and off a heater. The vacuum is regulated by turning off the pump before it gets to high and turns back on when vacuum is low. Without regulating, a vacuum pump will destroy all but solid objects. Another method that I use that works reasonably well for softer parts is just to use peel ply and absorbent towel then wrap the while thing tightly with pallet wrapping plastic (100mm wide roll). This works well for laminating FG/CF over a foam blank for rc fuselages. Not a perfect finish but quick and easy and nothing a bit of filling and sanding cannot fix. Good luck.
@sotirpopov3533
5 жыл бұрын
Thanks Dave for sharing it with us!
@SVSky
5 жыл бұрын
I want one but gosh, I don't think I can afford it considering how labor intensive it is!
@designbydave
5 жыл бұрын
No way I will make another one with this technique (well aside from the one to make up for this fucked up part.) Definitely too much labor. For the amount of hand labor I could have made a proper CNC aluminum mold and make the parts with prepreg.
@elaeroplano
4 жыл бұрын
And now when i watched the complete video, I se the next mistake. Between peel ply and breathing tape, bring a layer hole film. This plastic film as thousands of holes and allows the resin to flow into the breathing layer. It makes it much easier to rip off the peel when the resin is hardened. One more advice. To get to waste body, use roof mate foam. Cut it and sand it to the perfect shape. On that foam waste you apply the fabric. It is strong enough against the vacuum forces. After curing, rip off the plastic vacuum bag. Rip off the breathing layer. Rip off the hole film Rip off the peel play if there is one. Now sand your carbon part. After sanding drill a hole in the carbon Now fill in acetone to dissolve the polystyrene foam (Roofmate) Now you has the perfect carbon monocook
@malibu188
5 жыл бұрын
The construction methods used for the fuselage on FAI F5 class racing gliders use carbon/kevlar vacuumed techniques. The dimensions and shape also look similar. Best regards.
@NoTengoIlusiones
5 жыл бұрын
Thank you Dave, for such entertainement video, beautiful editing. And having as background Willy Wonka Candy factory is even better ! :) My question is ( excluding the fun and cool looks), why? I mean carbon is perfect for many things, but for nose.... in a whack, since there's no flexibility in the material the changes of cracking are quite high. Cheers and keep showing us those projects. Fly safe.
@designbydave
5 жыл бұрын
First thing, don't whack. There's also going to be an expensive camera on there so I'm much more concerned with the camera breaking then the mounts. In fact, I'd much prefer the mount to crack/break as I can just make another one. Carbon is a perfect material for this type of application and the part is also a perfect part to try out this technique.
@NoTengoIlusiones
5 жыл бұрын
@@designbydave Thanks for reply. Wacking is "part of the game". There's no HG pilot with a clean sheet 😉 I was thinking in gopro in a good case, rather expensive SLRs. Just come to my mind including in the design a weak link ( replaceable?) Elbow shape or something. And may ask to Dustin Martin for help/tips. I believe he was making the PODs for instruments. Cheers
@EphiBlanshey
5 жыл бұрын
Interesting project! When doing wet layup of carbon fiber I believe each layer should be done individually, to let the epoxy saturate and cure fully, otherwise it will penetrate unevenly and sacrifice strength. Overall cool video though!
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