Podcast
Questions and Answers
Which materials did Howard Hughes use to construct the Spruce Goose?
Which materials did Howard Hughes use to construct the Spruce Goose?
What was the empty weight of the Spruce Goose?
What was the empty weight of the Spruce Goose?
How many engines powered the Spruce Goose?
How many engines powered the Spruce Goose?
What was the maximum takeoff weight of the Spruce Goose?
What was the maximum takeoff weight of the Spruce Goose?
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What were the primary control surfaces of the Spruce Goose made of?
What were the primary control surfaces of the Spruce Goose made of?
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Which type of wood is typically used for construction in aircraft?
Which type of wood is typically used for construction in aircraft?
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What is the mil-spec for solid spruce?
What is the mil-spec for solid spruce?
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What is the mil-spec for plywood?
What is the mil-spec for plywood?
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What is the maximum acceptable diameter for hard knots in wood used for aircraft repair?
What is the maximum acceptable diameter for hard knots in wood used for aircraft repair?
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What type of grain is acceptable in wood used for aircraft repair?
What type of grain is acceptable in wood used for aircraft repair?
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Which material was among the first used to construct aircraft?
Which material was among the first used to construct aircraft?
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What were most of the airplanes built during World War One constructed of?
What were most of the airplanes built during World War One constructed of?
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Why was wood the material of choice for aircraft construction into the 1930s?
Why was wood the material of choice for aircraft construction into the 1930s?
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What did the British airplane company de Havilland produce during the late 1940s?
What did the British airplane company de Havilland produce during the late 1940s?
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What hindered the development of strong lightweight metal aircraft structures in the early part of World War II?
What hindered the development of strong lightweight metal aircraft structures in the early part of World War II?
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Which one of these is a type of wood defect characterized by longitudinal cracks extending across the annual rings?
Which one of these is a type of wood defect characterized by longitudinal cracks extending across the annual rings?
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Which one of these is a type of wood defect characterized by longitudinal cracks usually between two annual rings?
Which one of these is a type of wood defect characterized by longitudinal cracks usually between two annual rings?
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Which one of these is a type of wood defect caused by artificially induced stress?
Which one of these is a type of wood defect caused by artificially induced stress?
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Which one of these characteristics is associated with compression wood?
Which one of these characteristics is associated with compression wood?
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What should be done if there is doubt about the material or subject?
What should be done if there is doubt about the material or subject?
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Which of the following indicates deterioration in the plywood and spruce structures of a wooden aircraft?
Which of the following indicates deterioration in the plywood and spruce structures of a wooden aircraft?
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What may be affected if there is deterioration in the leading and trailing edges of a wooden aircraft?
What may be affected if there is deterioration in the leading and trailing edges of a wooden aircraft?
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What is a possible cause of wood and glue deterioration inside a wooden aircraft structure?
What is a possible cause of wood and glue deterioration inside a wooden aircraft structure?
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What is a challenging aspect of inspecting glue joints in wooden aircraft structures?
What is a challenging aspect of inspecting glue joints in wooden aircraft structures?
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How can water penetration be detected in a wooden aircraft structure?
How can water penetration be detected in a wooden aircraft structure?
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According to the text, what is the purpose of the AC mentioned in the first paragraph?
According to the text, what is the purpose of the AC mentioned in the first paragraph?
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According to the text, when can the repairs identified in the AC be used as a basis for FAA approval of major repairs?
According to the text, when can the repairs identified in the AC be used as a basis for FAA approval of major repairs?
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According to the text, what is required for a certificated mechanic to perform work for which they are rated?
According to the text, what is required for a certificated mechanic to perform work for which they are rated?
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According to the text, how should an aircraft constructed or comprised of wood components be inspected?
According to the text, how should an aircraft constructed or comprised of wood components be inspected?
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According to the text, what is the ideal range of moisture in the structure of a wood aircraft?
According to the text, what is the ideal range of moisture in the structure of a wood aircraft?
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Study Notes
Inspection and Repair of Wooden Aircraft Structures
- Contours and alignment of leading and trailing edges need to be checked for shape deviation, as it indicates deterioration in the plywood and spruce structures.
- Deterioration in leading and trailing edges may affect the main wing structure, requiring a detailed internal inspection.
- Splits in fabric covering on plywood surfaces should be investigated to assess the condition of the plywood skin beneath.
- Moisture can cause wood and glue deterioration inside a structure, even without external indications.
- Musty or multi-odor during initial inspection indicates moisture, fungal growth, and possible decay inside the aircraft structure.
- Glue joint inspection in wooden aircraft structures is challenging due to limited access and difficulty in assessing joint integrity.
- Wood shrinkage caused by temperature and humidity changes can lead to glue joint deterioration, especially in cyclic environments.
- Glue joint failure can occur due to aging, moisture, mechanical forces, or incorrect application of pressure during manufacturing.
- Wood decay and dry rot are easily detectable through discoloration, softening, or crushing of the wood.
- Water penetration can be detected through dark gray streaks, discoloration, or corrosion around screws and fittings.
- Fabric covering on plywood surfaces provides an indication of the wood condition underneath and should be inspected for cracks or swelling.
- Mechanical defects, such as compression failures, cracks, or missing/loose attachments, should be checked in structural members and spars.
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Description
Test your knowledge on the inspection and repair of wooden aircraft structures with this informative quiz. Learn about key indicators of deterioration, moisture damage, glue joint integrity, wood decay, and more. Assess your understanding of detecting and addressing mechanical defects in structural members and spars.
