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How are the flaps controlled?
Flaps. Flaps are mounted on the trailing edge on the inboard section of each wing (near the wing roots). They are deflected down to increase the effective curvature of the wing. Flaps raise the maximum lift coefficient of the aircraft and therefore reduce its stalling speed.
What methods of fabric testing is approved by the FAA?
The FAA only accepts a pull test from the factory or a lab. But in order to do that, you have to cut off a sample piece of fabric. The Maule tester is the best way to get a good idea of condition in the field.
What is the importance of knowing the general fabric covering processes of an aircraft?
The purposes of the fabric covering of an aircraft are: To provide a light airproof skin for lifting and control surfaces. To provide structural strength to otherwise weak structures. To cover other non-lifting parts of an aircraft to reduce drag, sometimes forming a fairing.
Can a fabric airplane be repainted?
It’s easy to repaint. Depends on how you want it to look, and why it’s being repainted. A lot of wood and fabric planes gain a hole in the fabric and a simple patch and repaint of the patched area is easy enough.
What device is used to test fabric strength every 100 hours or annual?
The Maule punch tester, a spring-loaded device with its scale calibrated in breaking strength, tests fabric strength by pressing against it while the fabric is still on the aircraft.
What are the advantages and disadvantages of fabric in 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.
What was the life expectancy of a WWI pilot?
They were splattered mid-air with the blood of the enemy and had a life expectancy of just 3 weeks, but to an adoring public, WWI flying aces were the rock stars of the skies. Necessity might be the mother of invention, but war is the father.
What kind of fabric does an airplane use?
Grade A cotton is no longer available and your airplane probably has one of the newer polyester fabric systems: Ceconite and Randolph dope, Stits Poly fiber, or either system topcoated with polyurethane paints.These systems are NOT interchangeable. All have their own procedure manual that among other things explains repairs. We offer these manuals.
What causes A Wrinkle in the fabric of an airplane?
Wrinkles or sags in the fabric most likely point to structural damage. For example, a dent in the metal leading edge of a wing would cause a sag or wrinkle in the fabric that would be visible from the outside. Blisters or rough areas under the fabric along lower longerons are an indication of rust in the steel tubing.
When is fabric considered to be airworthy?
Fabric is considered airworthy until the strength degrades to less than 70 percent of the original design strength. The FAA testing specification has always been in reference to the original material the aircraft was designed and certified with.
How is the tautness of polyester cloth controlled?
A significant factor regarding polyester cloth is that the tautness of the fabric is controlled by heating the fabric with a temperature-regulated device similar to a clothes iron. Application of dope or sealant materials will not appreciably shrink polyester, as is the case with cotton fabric.