Definition
An airframe construction method in which a welded framework of steel tubing forms the load-bearing structure of the fuselage, and a fabric covering is stretched over the frame and treated to provide an aerodynamic skin. The steel tube frame carries all flight and ground loads; the fabric carries no structural load but shapes the airflow and protects the structure.
Plain English
The aircraft's skeleton is made of welded steel tubes, and cloth is stretched tightly over the outside to form a smooth surface. The tubes hold the airplane together; the cloth just gives it shape and a clean surface for air to flow over.
Context Anchor
Seen in airframe construction descriptions, aircraft inspection discussions, and explanations of older or light airplane designs.
Why Pilots Care
This construction is light, strong, and relatively easy to inspect and repair, but the fabric covering requires regular maintenance to stay airworthy.
Intuition Check
Do not assume “fabric” means ordinary loose cloth. In this construction method, the fabric is stretched tight, coated, and made into a firm aircraft covering.
Example Sentence 1
The Piper J-3 Cub uses steel tube and fabric construction, with a welded steel fuselage frame covered in treated fabric.
Example Sentence 2
Many classic tailwheel airplanes are still flying with their original steel tube and fabric fuselages because the structure is simple to maintain.