> >Hi All > I have a very old and (not complete) set of plans for the KR2 and >noticed that they call for 1" foam ribs on the wings but looking at all the >pics on Kr sit like Mark/L no ribs are used. >Albert. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
If you are building your wings in the conventional method ( by the plans), I highly recommend using the foam ribs. If not supported, the foam will sink over the long spans under the weight of the sanding board. The foam near the edges, where it is supported, will sand quicker. When the board is removed, the foam springs back and you end up with a wing with a hump in the center. The secret to get a nice wing is to get the foam base done well. If you get the foam right the rest is a piece of cake. Larry Flesner
