Aircraft Fabric Covering

Last updated on July 1st, 2020 at 07:32 am

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Aircraft Aerodynamics, Structures and Systems (3811 Questions)

Category B2 – Aircraft Aerodynamics Exams ( 128 questions 180 min),

easa_part_66_academy Ch03


Chapter 01: Aircraft Structures (70 pages),
Chapter 02: Aerodynamics, Aircraft Assembly, and Rigging (70 pages),
Chapter 03: Aircraft Fabric Covering ( 24 pages),
Chapter 04: Aircraft Metal Structural Repair ( 114pages),
Chapter 05: Aircraft Welding ( 38 pages),
Chapter 06: Aircraft Wood and Structural Repair ( 28 pages),
Chapter 07: Advanced Composite Material ( 58 pages),
Chapter 08: Aircraft Painting and Finishing ( 22 pages),
Chapter 09: Aircraft Electrical System ( 106 pages),
Chapter 10: Aircraft Instrument Systems (86pages),
Chapter 11: Communication and Navigation (78 pages),
Chapter 12: Hydraulic and Pneumatic Power Systems (54 pages),
Chapter 13: Aircraft Landing Gear Systems (96 pages),
Chapter 14: Aircraft Fuel System (62 pages),
Chapter 15: Ice and Rain Protection (32 pages),
Chapter 16: Cabin Environmental Control Systems (62 pages),
Chapter 17: Fire Protection Systems (22 pages),


Aircraft Fabric Covering

Fabric covered aircraft play an important role in the history of aviation. The famous Wright Flyer utilized a fabric-covered wood frame in its design,  and  continued to be used by many aircraft designers and builders during the early decades of production aircraft. The use of fabric covering on an aircraft offers one primary advantage: light weight. In contrast, fabric coverings have two disadvantages: flammability and lack of durability.

Aircraft Fabric Covering

A Technical Standard Order (TSO) is a minimum performance
standard issued by the FAA for specified materials, parts,
processes, and appliances used on civil aircraft. For example,
TSO-15d, Aircraft Fabric, Grade A, prescribes the minimum
performance standards that approved aircraft fabric must
meet. Fabric that meets or exceeds the TSO can be used as a
covering. Fabric approved to replace Grade-A cotton, such as
polyester, must meet the same criteria. TSO-15d also refers to
another document, Society of Automotive Engineers (SAE)
Aerospace Material Specification (AMS) 3806D, which details
properties a fabric must contain to be an approved fabric for
airplane cloth. Lighter weight fabrics typically adhere to the


Fabric strength is a major factor in the airworthiness of
an aircraft. Fabric is considered to be airworthy until it
deteriorates to a breaking strength less than 70 percent of
the strength of the new fabric required for the aircraft. For
example, if an aircraft was certificated with Grade-A cotton
fabric that has a new breaking strength of 80 pounds, it
becomes unairworthy when the fabric strength falls to 56
pounds, which is 70 percent of 80 pounds.


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