(1992). 12 approach should be combined with precise designing tools. Adding the ability to merge curves using Boolean operations will allow one to merge a circle with the tip of the wing, making it feasible to precisely design the cross-section of the missile. The techniques presented herein with the aid of the NUBS representation can be easily enhanced to support these features. The method pre...

In this paper, the equation of motion of an elastic 2 DoF wing model has been derived using Lagranges method. The aerodynamic loads on the wing were calculated via the Strip-Theory and the effect of compressibility was included. Wing deflections due to bending and twist motions were determined using the Assume-Mode method. The aeroelastic equations were solved numerically using the V-g method. ...

As airplane designs have trended toward the expansion of flight envelopes into the high angle of attack and high angular rate regimes, concerns regarding modeling the complex unsteady aerodynamics for simulation have arisen. Most current modeling methods still rely on traditional body axis damping coefficients that are measured using techniques which were intended for relatively benign flight c...

The engine is the heart of aircraft and deeply affects performance, flight safety, airline management, which makes it a critical component requiring maintenance. With advancement technology, augmented reality (AR), virtual (VR), mixed (MR) technologies have been introduced one after another. To increase maintenance skill ability, important to train for aviation Therefore, (EMMR) system was deve...

In structural engineering, thin-walled structures play an important role in the design of lightweight model. It carries different loading conditions when it exists any model, and is designed with thin plates or shells. Penetrating kinds holes can decrease their weight facilitate repair maintenance operations, such as those carried out for wing airplane. applications, cutouts are often employed ...

Airplane detection has been taking a great interest to researchers in the remote sensing filed. In this paper, we propose a new approach on feature extraction for airplane detection based on sparse coding in high resolution optical remote sensing images. However, direction of airplane in images brings difficulty on feature extraction. We focus on the airplane feature possessing rotation invaria...

Measuring flight characteristics of micro-UAVs is challenging because of their small size and low weight. These constraints prevent the use of conventional onboard measurement systems. The objective of this research was to capture the state information of a radio controlled (RC) airplane using an off-board motion tracking system and to use this state information to study the performance of the ...

A variable-structure control system designed to enable a fuselage-heavy airplane to recover from spin has been demonstrated in a hand-launched, instrumented model glider airplane (see figure). It has long been known that the most effective spin recovery technique for fuselage-heavy aircraft involves the use of ailerons to roll the airplane into the spin. This technique might be considered count...

The I \ ~ . C . ~ has delleloped means, including an injection impeller and ducted head h f l e s , to improre the cooling charact ee t i c s of the SS60-cubieinchdisplacement radial engines installed in a four-engine h a z y bomber. The improrements afforded proper cooling of the rear-row exhaust-ualre seats for a wide range of ~(~101-jhp angles, mixture strength, and airplane speeds. The resu...