Methodologies for preliminary design of variable wing geometry aircraft

2013 ◽  
Author(s):  
Shehryar Ishtiaq ◽  
Asif Israr
Keyword(s):  
Preliminary Design ◽  
Wing Geometry

Optimization of Tractor Propeller/Wing Configurations

1995 ◽  
Vol 209 (3) ◽  
pp. 215-226 ◽  
Author(s):  
L L M Veldhuis
Keyword(s):  
Experimental Verification ◽  
Approximate Calculation ◽  
Preliminary Design ◽  
Strong Reduction ◽  
Induced Drag ◽  
Numerical Studies ◽  
Wing Geometry ◽  
Using Data ◽  
Wing Performance ◽  
Dominant Influence

In this paper, a rapid, approximate calculation method for optimal lift distributions of tractor propeller/wing configurations will be formulated and discussed. Some numerical studies, performed with a computer program containing the coded method, reveal that substantial performance benefits can be obtained by adapting the wing geometry and twist distribution to generate optimum lift distribution. The example calculations show that the lift distribution for minimum induced drag differs significantly from the elliptic loading. Furthermore, the propeller angle of attack seems to have a dominant influence on the wing performance. Mounting the propeller at a negative (tilt down) angle with reference to the wing suggests a strong reduction of overall wing induced drag. Moreover, the wing efficiency is found to be strongly dependent on the spanwise propeller position. To produce realistic lift distributions the effect of profile drag is incorporated in the model. Experimental verification of the presented theory using data from simple propeller/wing windtunnel models proves the validity of the method for preliminary design purposes.

The Minnesota inverted-tee system: Parametric studies for preliminary design

PCI Journal ◽  
2012 ◽  
Vol 57 (2) ◽  
pp. 162-179
Author(s):  
Roberto Piccinin ◽  
Arturo E. Schultz
Keyword(s):  
Preliminary Design ◽  
Parametric Studies

IDENTIFIKASI RASIO PARAMETER KAPAL PENUMPANG CATAMARAN BERBAHAN FRP

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Soegeng Hardjono
Keyword(s):  
Main Parameter ◽  
Slenderness Ratio ◽  
Technical Analysis ◽  
Preliminary Design ◽  
Naval Architecture

Parameter ratios are important information for the ship designer in the preliminary design stages. They can be used as a tool to identify the main parameter of vessel and their other technical characteristics. The information about parameter ratios of mono-hull vessel is currently available in Naval Architecture literatures, but it is not the case for the type of twin-hull vessel called catamaran. Having conducted technical analysis in this research, it has been identified that parameter ratios of passenger catamaran vessel made of FRP has values of L / B ratio from 2.52 up to 3.7, L / D ratio from 5.25 up to 11:24, slenderness ratio (Lwl/BwL) from  9 up to 12. Other values of various parameter ratios like B/T, D/T, L /√ L, and Displacement/L are also discussed.

Kajian Kinerja Kapal Bantu Hidro-Oceanography

2019 ◽  
Vol 4 (1) ◽  
pp. 35
Author(s):  
Meitha Soetardjo ◽  
Dian Purnamasari
Keyword(s):  
Preliminary Design ◽  
Resistance Model ◽  
Supporting Force

Bantu Hidro-Oceanography (BHO) adalah salah satu satuan bantu dalam bidang survei Hidro-Oceanography yang termasuk dalam susunan tempur pendukung (Supporting Force). Untuk kepentingan tersebut maka preliminary design kapal Hidro-Oceanography dilaksanakan sebagai langkah awal dalam perencanaan dan pengadaan kapal Hidro-Oceanography untuk mengkaji karakteristik umum desain yaitu hidrostatik dan stabilitas sehingga aspek kelayakan kapal dapat terpenuhi. Analisa hasil kajian kinerja kapal Hidro-Oceanography dipersiapkan untuk pengujian tahanan/resistance model kapal.Keywords : Preliminary design1, Hydrostatic2, Stability3

Contemporary Methods of Designing Rail Vehicle Running Systems with the Use of CAD and CAM Solutions

2020 ◽  
Vol 64 (187) ◽  
pp. 75-80
Author(s):  
Tomasz Antkowiak ◽  
Marcin Kruś
Keyword(s):  
System Design ◽  
Preliminary Design ◽  
Support Design ◽  
Detailed Design ◽  
Final Shape ◽  
Rail Vehicle ◽  
Design Engineers ◽  
Running System ◽  
Cad Cam

The article discusses the process of designing the running system of a rail vehicle using CAD and CAM tools as the solutions supporting the process. It describes the particular stages of design taking its final shape: from a preliminary design, through a detailed design, ending with the stage of production. Each stage includes a presentation of how CAD and CAM tools are used to support design engineers in their practice. Keywords: running system, design, CAD, CAM

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