Sitka Sprucehas been used in the making of aircraft since the beginning of human flight, and for good reason, Spruce is very strong great flexural rigidity and relatively light and the Rolls Royce of Spruce (softwood) is Sitka Spruce.
We offer a selection of square and rectangular sections to RC Aeromodellers for use as spars and other components. This is the real stuff. The Sitka Spruce we import is from Sitka Alaska, not just Common Spruce. Now a protected species only forest natural fell timber is harvested and milled.