Eppler 817 Main Foil Prototype


#1

Hi All,

I’m not officially starting a build yet but as I’m wanting to try out a new vacuum bagging technique on another project, I decided to try the new idea out on a main foil. I have based the dimensions of the foil on those proposed in the "Optimum wing " thread. I have uploaded a full set of .STL’s and also the Fusion 360 file to Thingiverse so that others can modify the model. My plan is to vacuum bag the PLA printed core with a few layers of CF. As I state in my Thingiverse text, this wing is completely untested

My vacuum bagging will be fairly conventional except that I will be using an 0.2mm silicone film mounted in a frame as the vacuum bag. I’m confident this will mean I can skip the peel ply and most of the synthetic wadding used in most vacuum bagging setups. The silicone should stretch and most importantly, not stick to the epoxy. The foil will be my guinea pig as it’s relatively small and simple in shape.

I will keep you updated on my progress in this thread.

BTW, I am located in NSW Australia for those of you who are curious. :upside_down_face:


#2

Benonymous,

Very very nice. What about a nice rectangle hole in the middle piece to allow for some flat metal piece to insert for much stronger screws ?


#3

Love it! Looking to 3d Print my whole Foil on a Micromake C1 in Pla and then Fibreglass it for strenght! Keep us updated!


#4

Hi philgib, yes, for an insert. I could just make an updated center section for that. As it stands, I was going to through-bolt it but a plate with threads would mean only one set of draggy bolt heads :slight_smile:


#5

Yes. We just did the same, printing MaB foil and cover it with carbon, but without prior inserting a strong metal central piece before covering with Carbon, and it looks to me as a mistake.


#6

I have added a new centre section with a recess for a 5mm thick metal plate that can be drilled and tapped for mounting the wing.