Skin temperatures and radiant energy were measured on a subject wearing flight clothing, sitting in a tactical aircraft exposed to thermal energy characteristic of thermonuclear weapons. Radiant energy source was 960 lamps at power levels up to 4000 kilowatts. After exposures of increasing severity, subject tolerance was attained in a 3 cal/cm pulse of 3.7 seconds duration. This pulse charred p...

Emphasis in the paper is placed on describing guided wave successes and challenges for applications in aircraft, composite materials and pipeline inspection. Guided wave imaging methods discussed includes such topics as line of sight, tomography, guided wave C scan, phased array, and ultrasonic vibration methods. Applications outlined encircles lap splice, bonded repair patch, fuselage corrosio...

This study aims to produce a Fixed Wing-Vertical Takeoff Landing (FW-VTOL) design that has good aerodynamic characteristics on its wing and fuselage. The process begins with determining the Design Requirement Objective (DRO). According DRO, aircraft is designed be able operate at speeds of 14 m/s an altitude 120 m (cruise phase) above ground level. Maximum Weight (MTOW) planned estimated using ...

Boundary layer induced noise, i.e. noise inside the aircraft resulting from the turbulent boundary layer enclosing the fuselage, is known to dominate air-cabin noise at cruise conditions. In this paper a method is described to design trim panels containing a large number of coupled tubes to effectively reduce this type of noise. The theory of viscothermal wave propagation in tubes, as presented...

The methods in these notes allow us to compute the overall aircraft drag. With well-designed airfoils and wings, and a careful job of engine and fuselage integration, L/D's near 20 may be achieved. Yet some aircraft with predicted L/D's of 20 have actual L/D's of 0 as exemplified by any paper airplane contest. Many aircraft have been dismal failures even though their predicted performance is gr...

Carbon or graphite fi ber composites are replacing metal structures and parts in many industries, such as aerospace, general transportation, high performance automotive, and sporting goods. These materials are favored for their reduced weight and greater strength relative to traditional metal parts. For example, the Airbus A350 and Boeing 787 are both made of approximately 50% composite materia...

According to problems such as low accuracy, high error in the shearer body position, this paper proposes a new computational method combining with the information of shearer, scraper conveyor and hydraulic support in order to realize three machine positioning. Using the sensor information and staticdynamic fusion, this paper solves positioning problem of the three-dimensional in the process of ...