Re: Carbon (Kevlar) Prop Outlines

From: <mkirda_at_sbcglobal.net>
Date: Wed, 19 Dec 2012 21:40:26 -0000

Or just put boron on the top and bottom of some square 0.025" 4# balsa.

Form the outline around the form, glue on the boron, soak for a bit, then put on the prop block. Add top boron after it all dries. Easy-peasy...

Regards.
Mike Kirda



--- In Indoor_Construction_at_yahoogroups.com, themaxout@... wrote:
>
> One would think an easy way to mold fiber prop outline would be to carve
> the upper surface of the desired prop from a block. Then, use the outline
> and that surface as the prop jig. Wax the form and the prop outline would
> be made from whatever fiber/etc. Using that carved form as the jig then
> makes it seem fairly straightforward.
>
> Rick Pangell
> Editor of "The Max-Out" Newsletter of
> The Magnificent Mountain Men FF Club of Colorado
>
>
> In a message dated 12/19/2012 1:25:55 P.M. Mountain Standard Time,
> lauren.rezac_at_... writes:
>
> I have been reading about the Kevlar and Carbon prop outline method by
> Lutz Schram, described in INAV 121 and 123. They describe the construction
> of the outlines but talk very little about the forming jigs. Since the
> method cures the twist of the blades during construction of the outline, the
> method for including the appropriate twist into the forms would be a key
> issue. Is there somewhere I could find further discussion about the construction
> of the forms? The forms in Issue 121 seem to be flat (no spanwise twist)
> while the forms in issue 123 seems to have significant twist. Also, the
> forms are assembled using fasteners. Is this done to create a trough to layup
> the carbon/Kevlar? Were the construction forms molded on a prop pitch
> block?
>
>
>
> ------------------------------------
>
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Received on Wed Dec 19 2012 - 13:40:28 CET