Thanks!
The spars are made by laminating both sides of a sheet of balsa with 19 gsm
prepreg as suggested by Vladimir Linardic.
Ribs are made by laminating the same prepreg on a sheet of wood but this
time curing will not be done on a flat plate but on a simple tool you can
see in the attached picture. There is also a picture of the spar sheets
attached.
Using with prepreg makes it possible to cure the carbon in the same step as
glueing to the balsa, so no additional glue or resin was required. Curing
for both the ribs and spars was done at 120C under vacuum.
The sheets were simply sliced to make the separate ribs and spars.
All sheets of wood were A-grain, such that after slicing either the ribs or
the spars the wood between the carbon is C-grain.
Kevin
Op vr 20 feb. 2015 06:20 schreef Tapio Linkosalo tapio.linkosalo_at_iki.fi
[Indoor_Construction] <Indoor_Construction_at_yahoogroups.com>:
>
> On 20/2/2015 0:20, Kevin Lamers kevin.lamers_at_gmail.com
> [Indoor_Construction] wrote:
>
>
> Hi!
>
> Here some pictures of my experimental wing completely covered with
> carbon. Tips still have to be done. No boron is used. Current weight is
> 0.25 gram. From what I can judge it feels really strong. As it seems now,
> also the stab can be build like this, the possibilities seem endless with
> the new 1.4 gram rule!
>
>
> Wow! I was thinking of this kind of structure for F1M when reading
> about Bill's new Pennyplanes, but did not realize that the structure would
> be feasible also for F1D. From the picture it seems that you have vertical
> grain balsa between the carbons? Do you laminate it to a larger sheet and
> then strip individual spars? If the carbon pre-cured and then glued to the
> balsa core, or do you glue it while laminating?
>
>
>
>
> -Tapio-
>
>
>
>
>
- application/x-ygp-stripped attachment: stored
- application/x-ygp-stripped attachment: stored
- application/x-ygp-stripped attachment: stored
Received on Thu Feb 19 2015 - 23:48:05 CET