Making of ultra-light carbon fiber helicopter rotor blades. Core material: XPS Carbon fabric: Spreadtow Nose weight: 2mm titanium rod Resin: L285 Weight of one 700mm blade: 50g
Add mold release agent to the mold. Batter the carbon fiber in epoxy resin mix. Add grommets Reinforcement with battered unidirectional carbon fiber strips Reinforcement with iron on leading edge More reinforcement with uniD Fiberglass/denim/or kevlar middle Cure 24-48 hrs Seperate top halves, rough surfaces Clean with MEK or acetone Prepare fresh mix of epoxy/resin Coat removed top and bottom layers Add top and bottom layers to final form mold (he uses a press mold without vacuum degassing[weaker quality]) Cure 24-48hrs Check for bubbles or deformation and delamination Balance rotors *On a propeller balancer Balance by wet sanding to remove epoxy from heavier side Powder coat at 3-8 microns Check for even coat, Remove drips if any Rebalance while polishing with a polishing compound (not shown)
Titanium or nickel is also typically used on the leading edge, steel is just cheaper. I want to try nitinol for strength and a nichrome heating element to be able to control (variable) pitch. To decrease pitch slightly for heavier loads by heating the propellers from within. The carbon fiber strands would have to wrap around the propeller like a muscle in a bird wing to be able to flex in that direction without delamination. But I think it's possible.
@@kizzjd9578 Kinda. For good torsion stiffness you would use a bidiagonal layup with +- 30° or something like that. Depending on how much bending force you are expecting at the same time. Using a normal (flat) 1x1 at 45° isn't ideal but it's a good mix between torsion stiffness and ease of layup. At least that's my guess for why it was laid down like that.
![CFK PROPELLER LAMINIEREN - ALU-FORMEN AFT19EVO & AFT25EVO FLORIAN SCHAMBECK LUFTSPORTTECHNIK [4K]](http://i.ytimg.com/vi/ZsKYSFx3GNo/mqdefault.jpg)
![Eminem - Like My Shit [Official Audio]](http://i.ytimg.com/vi/vx_IMvFkrfA/mqdefault.jpg)
Sehr schönes spin-off zum Bau des Ultraleicht-Helis. Danke!
Coole Sache, find ich toll was ihr handwerklich könnt. Schönes Projekt👍
Any chance of a video on how you made your mold
Beautiful blades! How do you balance the blades after you take them out of the mould?
It would be great if you can explain the process with text overlay
Add mold release agent to the mold.
Batter the carbon fiber in epoxy resin mix.
Add grommets
Reinforcement with battered unidirectional carbon fiber strips
Reinforcement with iron on leading edge
More reinforcement with uniD
Fiberglass/denim/or kevlar middle
Cure 24-48 hrs
Seperate top halves, rough surfaces
Clean with MEK or acetone
Prepare fresh mix of epoxy/resin
Coat removed top and bottom layers
Add top and bottom layers to final form mold (he uses a press mold without vacuum degassing[weaker quality])
Cure 24-48hrs
Check for bubbles or deformation and delamination
Balance rotors
*On a propeller balancer
Balance by wet sanding to remove epoxy from heavier side
Powder coat at 3-8 microns
Check for even coat,
Remove drips if any
Rebalance while polishing with a polishing compound (not shown)
Titanium or nickel is also typically used on the leading edge, steel is just cheaper. I want to try nitinol for strength and a nichrome heating element to be able to control (variable) pitch. To decrease pitch slightly for heavier loads by heating the propellers from within. The carbon fiber strands would have to wrap around the propeller like a muscle in a bird wing to be able to flex in that direction without delamination. But I think it's possible.
What for, rc blades?
@flyingchrisRC are them semi-symmetrical? or symmetrical blades? I'm interested on which rotor head are you using on your main disc. Nice videos!
May I ask what material the logo in the mold is made of?
Gotta add weight to the blade tips
Pls. teach me how to make the mold?
What is the white material core you used there?
I think that is extruded polystyrene foam www.homedepot.com/b/Building-Materials-Insulation-Foam-Board-Insulation/XPS/N-5yc1vZbaxxZ1z0w1xo
Buongiorno sono Sergio (Italy) lo stampo delle pale di che materiale è costruito ???? Grazie e complimenti
how to make dye ?
Why is the fibre direction on a 45° angle?
To increase torsion stiffness
@@KevinATJumpWorks wouldnt you want it different directions
@@kizzjd9578 Kinda. For good torsion stiffness you would use a bidiagonal layup with +- 30° or something like that. Depending on how much bending force you are expecting at the same time. Using a normal (flat) 1x1 at 45° isn't ideal but it's a good mix between torsion stiffness and ease of layup. At least that's my guess for why it was laid down like that.
Yea not good how to make video