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Here is the right wing main spar. The inboard end is at the bottom of the picture. The rear of the spar is visible in this view.

It comes gold anodized and all assembled. It is practically a work of art, with the gold finish and beautifully done riveting. Unfortunately Terry won't let me hang one on the wall.

The spar is assembled from four pieces. The heart of it is a 1/16 inch thick "C" shaped channel. On the rear side there is a waffle plate that reinforces it.

The outboard end (top of the picture) doesn't carry much load, so the waffle plate only goes to about 3/4 span, and there are lightening holes near the wing tips.



Here is a close up of the waffle plate at the inboard end.

The small holes with no rivets in them will be used to rivet the wing ribs too later.

The big holes at the inboard end (bottom of the picture) are for the bolts that attach the wing to the fuselage.



Here the spar has been turned over to show the front side.

You can see the large bars that reinforce the top and bottom edges. These bars get thinner as they go outboard because the biggest bending loads are at the inboard end.