12.70.4 Explain the components and distribution of the load on a wing:
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12.70.4(a) on the ground;
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12.70.4(b) in the air, and state the function of spars and struts in opposing these loads.
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12.70.6 Describe the precautions required to preserve the structural integrity of thefollowing airframes:
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12.70.8 Describe the indications of damage or failure of airframes constructed of;Sub Topic Syllabus Item
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12.70.6(a) aluminium;
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12.70.6(b) composite;
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12.70.6(c) fabric covered.
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12.70.8(a) aluminium;
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12.70.8(b) composite;
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12.70.8(c) fabric covering.
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12.70.10 Describe the procedure to tie down (or picket) a light aircraft.
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* * * Propellers * * *
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12.72 Propellers
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12.72.2 With respect to propeller terminology, define the meaning of the following:
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12.72.2(a) blade section;
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12.72.2(b) blade angle;
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12.72.2(c) helix (or pitch) angle;
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12.72.2(d) angle of attack.
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12.72.4 Explain the reason for blade (or helical) twist.
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12.72.6 With the aid of a diagram, identify and define the following for a rotating bladesection:
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12.72.6(a) direction of rotation;
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12.72.6(b) relative airflow;
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12.72.6(c) total reaction, with its components;
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