Abstract One of the characteristic features piston engines are vibrations caused by pistons moving in cylinders. During engine design process, it is necessary to determine level vibration that can occur engine. This especially important for aircraft engines. Due minimization weight aircraft, limit factors may cause damage structure. these vibration, which resonance and, consequently, a dangerou...

In this paper, a new approach has been proposed to identify and model the dynamics of a highly maneuverable aircraft through fuzzy logic algorithm. In general, aircraft flight dynamics is considered as a nonlinear and coupled system whose modeling through fuzzy logic algorithm can be done using a few experimental flight tests data. In this study, for identification and modeling of the aircraft ...

Previous studies have indicated more birds collide with communication towers equipped with red warning lights than with towers equipped with lights of shorter wavelengths. We used the U.S. Federal Aviation Administration’s National Wildlife Strike Database to determine if a similar relationship exists for turbine-powered jet aircraft with 2 underwingor fuselage-mounted engines and bird strikes....

Here, we show that during their half-century history, helicopters have been evolving into geometrically similar architectures with surprisingly sharp correlations between dimensions, performance , and body size. For example, proportionalities emerge between body size, engine size, and the fuel load. Furthermore, the engine efficiency increases with the engine size, and the propeller radius is r...

An approach was developed which allows for design studies of commercial aircraft using physics-based noise analysis methods while retaining the ability to perform the rapid tradeoff and risk analysis studies needed at the conceptual design stage. A prototype integrated analysis process was created for computing the total aircraft EPNL at the Federal Aviation Regulations Part 36 certification me...

Emissions from aircraft engines represent a highly complex and important issue, which is related to the risk to human health. Particles emitted in urban areas and in the vicinity of airports affect air quality and have a particularly negative impact on airport workers. The development of measurement techniques and the methodology for evaluating exhaust emissions have allowed for the elaboration...

A study to estimate the size of the cabin and major aircraft components as well as detect and avoid interference between internally placed components and the external surface, during the conceptual design synthesis and optimisation to explore the design space of a BWB, was conducted. Sizing of components follows the Bradley cabin sizing and rubber engine scaling procedures to size the cabin and...