I did Rick. The last photo in the group is the 2 props together. The 5th photo is the molds off of the prop. It was a CF,S glass, Kevlar mix all hand laid without vacuum simply put together when the 2 halves were still wet. It weighed 1 oz more than the factory prop.
I did it to do it. Just because.
Carbon tubes and ribs or anything could be made with multi part molds.
It's all in the recipe.
Karl
--- In
This email address is being protected from spambots. You need JavaScript enabled to view it., Rick Mullins
wrote:
>
> Did you use a propeller to make your mold?
>
>
> ________________________________
> From: KarlS <kschneider@...>
> To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> Sent: Tuesday, March 6, 2012 11:03 AM
> Subject: [Carbondragonbuildersandpilots] Re: Wing ribs
>
>
> Â
> I mentioned one time I have some experience in composites. I think you can make carbon tubing pretty easy. I made this hollow carbon tube that was in the shape of a prop once. It whizzed around at about 6000 rpm. It was really pretty strong and I didn't break it until I miss judge the slip angle landing and ended up in the top of a tree. This is a 30 in prop on a 150cc twin.
>
> I posted some pictures on our site. Here's the link.
>
> groups.yahoo.com/group/Carbondragonbuild.../1955791425/pic/list
>
> Making a carbon tube assembly that doesn't spin at 6K could be done easily.
>
> Karl
>
> --- In This email address is being protected from spambots. You need JavaScript enabled to view it., "Philip Lardner" wrote:
> >
> > I don't know how Atos fabricate their hollow ribs (I'll take a look at a
> > friends VQ next time we're flying), but one process that might work is to
> > form them around a foam core as already described and then (through a couple
> > of small holes at non-critical locations) to inject a solvent (acetone) to
> > remove the PVC foam, which comes out as a gloopy snot! I read about this in
> > John Wanberg's Composite Materials Fabrication Handbook #1 of 2 (available
> > from Amazon.) I'm not sure the extra work would be worth the effort given
> > the weight of the foam involved.
> >
> > Phil.
> >
> > _____
> >
> > From: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > [This email address is being protected from spambots. You need JavaScript enabled to view it.] On Behalf Of Rick
> > Mullins
> > Sent: 06 March 2012 12:21
> > To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > Subject: Re: [Carbondragonbuildersandpilots] Re: Wing ribs
> >
> >
> >
> >
> >
> > I don't know if you are familiar with the ATOS hang glider. They fabricate
> > carbon fiber ribs that have a hollow box structure and are very light and
> > strong. I always wondered how they make them. I suppose they vacuum form
> > them over a male mold which would give a U shape, Then after removing them
> > from the mold you then somehow do that last surface, but how do you keep the
> > cloth from collapsing without internal support?
> >
> >
> > : Philip Lardner <philiplardner@>
> > To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > Sent: Monday, March 5, 2012 7:55 PM
> > Subject: RE: [Carbondragonbuildersandpilots] Re: Wing ribs 