Bera, Rajendra K (1974) *Some remarks on the solution of the lifting line equation.* Journal of Aircraft, 11 (10). pp. 647-648. ISSN 0021-8669

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## Abstract

The present work offers a simplification in the solution of Prandtl's lifting line equation. The equation for the local circulation is usually solved using a sine series in a collocation method. Using the fact that local circulation and local geometric angle of attack are related by a linear operator, an expression can be obtained for the drag coefficient containing only the square of the unknown constants, which implies that the loadings are orthogonal in Graham's sense (1952). Expressions are derived for the unknown constants, making use of the orthogonality of the loadings. The solution gives an approximate solution along the entire span, so that discontinuities, flap deflections, etc., can be accounted for.

Item Type: | Journal Article |
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Additional Information: | Copyright for this article belongs to AIAA |

Uncontrolled Keywords: | Mathematical analysis;Circulation;Hoisting;Coefficients; Orthogonality;Approximation;Geometry;Angle of attack;Drag (hindrance);Deflection;Flaps;Aircraft;Integral equations; Lift;Rectangular wings;Wing loading;Aerodynamic coefficients;Aerodynamic drag |

Subjects: | AERONAUTICS > Aircraft Design, Testing & Performance AERONAUTICS > Aerodynamics |

Division/Department: | Aerodynamics |

Depositing User: | Mrs Neetu Chandra |

Date Deposited: | 17 Mar 2010 |

Last Modified: | 07 Jun 2010 16:18 |

URI: | http://nal-ir.nal.res.in/id/eprint/4477 |

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