Patience …

… is a gift and usually pays off.

The rough XPS core of the cabin is ready to cover. I hoped to be able to use few pieces of abachi veneer to cover it, but it turned out to be impossible. Thus, I remembered a technique I’ve used several times in rc-models. The basic idea is to use small strips of wood to cover the spherical surface. Take for example the prototypes I made for the S12 (1:6), the Beluga (1:4), and Schneewittchen (1:4):

IMG_0013_s

IMG_9523_s

P1030081_s

The principle is always the same: Use thin strips to cover the surface.  If you try to cover a spherical section with a large sheet of abachi veneer, balsa or plywood, you produce huge shear loads in the sheet and most likely you’ll fail to get a good surface. The reason is that spherical surfaces have gaussian curvature. It’s very easy to cover a cylinder or a cone, because these lack gaussian curvature: Cones and cylinders are curved only in one direction, whilst the other is straight. This is not the case for the cabin of Schneewittchen, which has for sure gaussian curvature.

I used the same technique. The difference is that I have to prefabricate the curved venner sheet before it is cemented under pressure to the XPS core. This is how it looks at the moment:

There are still a couple of few square meters to cover. Though it will take a couple of days to finish, it is a nice relaxing job which is best done with some music, and of course with plenty of patience.

Dieser Beitrag wurde unter Allgemein veröffentlicht. Setze ein Lesezeichen auf den Permalink.

2 Gedanken zu “Patience …

  1. Hi Andres,I haven’t been here for a while,quite a lot of progress!
    Re the sheeting,Vincent123 on the nurfluegal forum has a good technique.He models the shape in cad,opens it out flat and cuts the strips with an auto mill.
    Regards Stuart

    Gefällt mir

Kommentar verfassen

Trage deine Daten unten ein oder klicke ein Icon um dich einzuloggen:

WordPress.com-Logo

Du kommentierst mit Deinem WordPress.com-Konto. Abmelden /  Ändern )

Google+ Foto

Du kommentierst mit Deinem Google+-Konto. Abmelden /  Ändern )

Twitter-Bild

Du kommentierst mit Deinem Twitter-Konto. Abmelden /  Ändern )

Facebook-Foto

Du kommentierst mit Deinem Facebook-Konto. Abmelden /  Ändern )

w

Verbinde mit %s