Complex sentence: Two pairs of V-shaped steel tube struts were attached to it at the wing trailing edge and at its foot; the first was horizontal, the other upward sloping, and their rear meeting points were used to support the fabric covered empennage.
Split into simpler sentences: Two pairs of V-shaped steel tube struts, attached to it at the wing trailing edge and at its foot. The first was horizontal, the other upward sloping, and their meeting points were used to support the fabric covered empennage.