Aircraft Spruce is a leading supplier of aircraft-grade Sitka spruce, birch plywood, capstrips, ribs, veneers, adhesives, and coatings. The wood is selected for strength, consistent grain, durability, and … Aircraft spruce, specifically Sitka spruce (Picea sitchensis), became the gold standard for wooden aircraft construction. Its straight grain, uniform texture, and excellent strength-to-weight ratio made it … This document provides information on wood used in aircraft construction. No other specie can match its exceptional strength to weight ratio. Serving certified, experimental, and homebuilt aircraft worldwide. Jan 15, 2025 · In modern times, Sitka spruce, with reputedly the greatest strength-to-weight ratio of any wood, took to the air. The famous Spruce Goose amphibious airplane, built by millionaire ….