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DRAG REDUCTION
Skin friction drag and induced drag are the major contributors to the total drag of an airplane, at least for a modern jet transport. For lower-speed, general aviation aircraft, form drag assumes more relative importance. A typical drag buildup (or breakdown, depending on your outlook) is presented in the bar graph of Figure 4.34 for a jet transport, as reproduced from
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% of total cruise drag Figure 4.34 Typical drag buildup for jet transport. |
Reference 4.11. It is seen that skin friction drag and induced drag account for approximately 75% of the total drag. Although the remaining 25% is not to be taken lightly, the potential for real savings in power or fuel rests with reducing the skin friction drag and induced drag.
