+ my like! some notes: The diameter of the holes is sufficient for the bolt heads but not for the top part of the fuselage that connects to the main wing. The fuselage will press its edges against the wing. Even with four layers of fiberglass and one layer of carbon, it cannot hold the load. The leverage at that point is approximately 30 times (40/1.27). If you suddenly press the tip of the wing against the ground with your weight (80 kg), it will create a force of 2400 kg distributed over an area of 20x0.2 cm where the fuselage edge touches the wing surface. I don’t think the laminate can hold it. The wood under the laminate will eventually be compressed and deformed. For my wing, I removed all the wood under the fuselage and tapered the walls, shaping the orifice like \__/ (wing bottom up). Then, I filled that cavity with cut fiberglass compound. This created a firm and reliable platform for the fuselage connection.
This step wasn't horrible for someone with ZERO experience with fiberglass. After having to measure my epoxy by volume as opposed to weight, I regretted not spending the extra money on the Entropy resin. Luke also makes fiberglassing look sooo easy. Experience definitely helps. Also, take your time sanding so you don't burn through you sealer coat, it can be hard to tell how thick it is.
it seems from all the vids I watched that everyone adds fiberglass and carbon fiber, why are the fiberglass and carbon fiber added, wouldn't it work fine if u just used it without adding anything? iam completely new to this btw so I may not know obvious stuff
You could, but eventually with wings and most importantly any connection point would fail. The foil comes under a lot of stress and force so glass is used for added strength (with a high strength to weight ratio)
carbon is not possible i have tried. fiberglass is easy and convinient because it bonds the edge and you dont loose shape. but carbon and my 100W laser is not possible to cut through fibers.
+ my like!
some notes:
The diameter of the holes is sufficient for the bolt heads but not for the top part of the fuselage that connects to the main wing. The fuselage will press its edges against the wing. Even with four layers of fiberglass and one layer of carbon, it cannot hold the load. The leverage at that point is approximately 30 times (40/1.27). If you suddenly press the tip of the wing against the ground with your weight (80 kg), it will create a force of 2400 kg distributed over an area of 20x0.2 cm where the fuselage edge touches the wing surface. I don’t think the laminate can hold it. The wood under the laminate will eventually be compressed and deformed.
For my wing, I removed all the wood under the fuselage and tapered the walls, shaping the orifice like \__/ (wing bottom up). Then, I filled that cavity with cut fiberglass compound. This created a firm and reliable platform for the fuselage connection.
Nice, how is that full composite strip holding up?
This step wasn't horrible for someone with ZERO experience with fiberglass. After having to measure my epoxy by volume as opposed to weight, I regretted not spending the extra money on the Entropy resin. Luke also makes fiberglassing look sooo easy. Experience definitely helps. Also, take your time sanding so you don't burn through you sealer coat, it can be hard to tell how thick it is.
Yeah does take some practise :) Good points for other viewers though. Very common to oversand the sealer coat when learning :)
And don't wear your beautiful Ocean Rodeo jacket wear the worst clothing you own
it seems from all the vids I watched that everyone adds fiberglass and carbon fiber, why are the fiberglass and carbon fiber added, wouldn't it work fine if u just used it without adding anything?
iam completely new to this btw so I may not know obvious stuff
You could, but eventually with wings and most importantly any connection point would fail. The foil comes under a lot of stress and force so glass is used for added strength (with a high strength to weight ratio)
My friend you must invest in a high end HEPA air purification system when doing this kind of work. Samsung AX90 would be my recommendation.
For sure, important to do this is a highly ventilated area.
Did you know you can cut carbon and also glass fiber cloth on a cheap CO2 laser in really complex shapes without any fraying
Yeah nice! For a project this small probably not needed though :)
carbon is not possible i have tried. fiberglass is easy and convinient because it bonds the edge and you dont loose shape. but carbon and my 100W laser is not possible to cut through fibers.