Induced Drag - Historical Perspective

Henderson, W. P.; Holmes, Bruce J.

doi:10.4271/892341

Cited by 34 publications

(9 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Henderson and Holmes (1989) increased aspect ratio, elliptical loading, and low lift coefficient are the main criteria to be considered for induced drag reduction and classical linearized theory do support this stand. All these criteria have their limitations which cannot be crossed off due to valid design reasons.…”

Section: Induced Drag and Conventional Wing Tip Researchmentioning

confidence: 99%

“…At first, wingtip designs were related to the classical linear theory which says that increased aspect ratio, lower lift coefficient, and elliptical load distribution considering the structural limit can reduce the induced drag (Spillman, 1987;Henderson & Holmes, 1989;Rokhsaz, 1993). (Craes, 2014) The characteristics of flying birds are such that they can change their wing shape almost instantly.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Literature Review: Biomimetic and Conventional Aircraft Wing Tips

Siddiqui¹,

Asrar²,

Sulaeman³

2017

IJAAA

View full text Add to dashboard Cite

Section: Induced Drag and Conventional Wing Tip Researchmentioning

confidence: 99%

mentioning

confidence: 99%

Literature Review: Biomimetic and Conventional Aircraft Wing Tips

Siddiqui¹,

Asrar²,

Sulaeman³

2017

IJAAA

View full text Add to dashboard Cite

“…(1), the induced drag varies with the lift produced by the aircraft wing. Throughout the flight profile, induced drag constitutes 40% to 50% of the total drag on the aircraft [6,7]. While a lower lift coefficient/weight and longer spans intuitively can help reduce the drag due to lift, the fact that many aircraft missions require higher lift coefficient/payload, i.e.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Induced and Parasitic Drag on Wings with Minimum Induced Drag

Abdel-Motaleb

Taylor

Hunsaker

et al. 2019

AIAA Scitech 2019 Forum

View full text Add to dashboard Cite

Minimizing the induced drag for steady level flight is a variational problem that requires solving for the optimum lift distribution given a set of design constraints. From lifting-line theory, minimizing the induced drag is, in part, achieved by varying the Fourier coefficients used to describe the section lift. The elliptic lift distribution minimizes the induced drag for a wing with fixed weight and wingspan by setting all but the first coefficient to zero. If wingspan is allowed to vary, a negative third Fourier coefficient is utilized to reach an optimum lift distribution that further reduces the induced drag for stress-limited designs. However, to produce an optimal section-lift distribution for minimum induced drag, the wing is required to vary twist along the span, which contributes to the parasitic drag component and may compromise the benefits gained from minimizing the induced drag. Here, the effect of these lift distributions on the parasitic drag is investigated. It is shown that twisting the wing to produce optimal lift distribution that minimizes induced drag can increase the parasitic drag values enough to nearly cancel or surpass the benefits gained by the reduction of the induced drag depending on the aircraft and flight conditions. One aircraft example is studied. Other aircraft might have different results.

show abstract

“…10,11 Determining the drag savings for a given tip modification is not always an easy task, however. 12 Numerous other investigations of wing performance have been performed using analytical, numerical, and experimental techniques many of which are mentioned in reviews by Henderson and Holmes 13 and Rokhsaz.…”

Section: Introductionmentioning

confidence: 99%