Claim: Despite the fact that the original materials were not duplicated and the Carlson model is built with a fiberglass fuselage over a welded steel frame, with a tailcone made of 2024-T3 aluminium (an aluminium alloy, with copper as the primary alloying element, used in applications requiring high strength to weight ratio), supported by internal bulkheads, Carlson set out to build his replica as closely as possible to the original, working from the only surviving documents, some sketches, a few photographs and one three-view drawing.
Evidence: The original materials were not duplicated and the Carlson model is built with a fiberglass fuselage over a welded steel frame, with a 2024-T3 aluminium tail cone, supported by internal bulkheads. Carlson set out to build his replica as closely as possible to the original, working from the only surviving documents, some sketches, a few photographs and one three-view drawing. 2024 aluminium alloy is an aluminium alloy, with copper as the primary alloying element. It is used in applications requiring high strength to weight ratio, as well as good fatigue resistance.