II — A. Lister

1985 ◽  
Vol 38 (3) ◽  
pp. 431-435 ◽  
Author(s):  
A. Lister

Several years ago, when Airbus Industrie launched their twin-engined A 300 Airbus, it became apparent that a new generation of long-range aircraft was about to add a different facet to the shape of international air travel. The enormous power available from the big fan engines coming into use meant that adequate performance was available even when an engine failure meant the loss of half the installed thrust. Coupled to this was a standard of fuel economy and tank capacity which meant that the new aircraft were capable of operating over ranges far in excess of those previously attained by twin-engined aircraft.

2017 ◽  
Vol 70 (4) ◽  
pp. 761-774 ◽  
Author(s):  
Shiyou Li ◽  
Xiaoqian Chen ◽  
Lihu Chen ◽  
Yong Zhao ◽  
Tao Sheng ◽  
...  

The Automatic Identification System (AIS) receiver on board the main satellite of the TianTuo-3 constellation, LvLiang-1, is a new generation of AIS receiver. Having partly solved the signal conflict problems and with larger coverage over the ground, the AIS receiver on board TianTuo-3 greatly improves the signal detection ability. The data received by the AIS receiver during the TianTuo-3 debugging stage is employed for detailed analysis in this paper. Results include: TianTuo-3 implements four-frequency detection at the same time, and a time-flag is inserted into the received AIS data, a small portion of Class A vessels (at least 1480) have been equipped with AIS sending the long range AIS broadcast message with two new frequency channels and the hourly averaged count of the message received by TianTuo-3’s AIS is between 1500 ~ 2500. This AIS receiver is capable of real-time tracking a single vessel. In conclusion, the TianTuo-3 space-based AIS receiver is capable of continuously receiving AIS messages sent by global maritime vessels.


Subject Mexico's illicit arms trade. Significance On September 6, a police helicopter crashed over Michoacan during a gunfight with a criminal group. While the direct cause of the crash appears to have been pilot error, a Barret .50 calibre long-range sniper rifle was involved in the skirmish. Military grade weapons feature increasingly in state-criminal confrontations, and drug cartels have proven themselves capable of shooting down aircraft -- the New Generation Jalisco Cartel (CJNG) brought down an army helicopter in Jalisco in May 2015. Impacts Cartel rivalries will drive their desire for ever more sophisticated weaponry. In the absence of a state monopoly of militarised weaponry, government efforts to contain criminal violence will be ineffective. Efforts to bring the arms trade under control will depend as much on the decisions of Washington as those of Mexico City.


Author(s):  
Lane Winkelmann ◽  
Omer El Saeed ◽  
Matt Bell

The lubricant industry is emphasizing the use of low-viscosity lubricants to increase fuel economy. Fuel mileage increases as high as 8% are claimed when conventional engine and driveline lubricants are replaced with new-generation products. Low viscosity lubricants, however, must contain more robust anti-wear and extreme pressure additives to counteract their reduced λ ratio. Consequently, switching to lower viscosity lubricants in order to gain fuel economy entails risk. Should the additive package fail to perform, engine, transmission, and drivetrain components will be seriously damaged. It seems appropriate then, to attempt to increase the λ ratio for low viscosity lubricants. This, of course, can be done by reducing surface roughness. Superfinishing the surface using chemically accelerated vibratory finishing is a practical and well proven approach for accomplishing this. This paper will present data from both laboratory and field testing demonstrating that superfinished components exhibit lower friction, operating temperature, wear and/or higher horsepower, all of which translate directly into increased fuel economy.


1999 ◽  
Vol 122 (2) ◽  
pp. 345-354
Author(s):  
Gary L. Borman

As we move into the twenty-first century the spread of affluence to a greater portion of an ever growing world population, coupled with dwindling reserves of crude oil, will make it imperative that we simultaneously protect our environment and enhance the fuel efficiency of transportation vehicles. Although reduced vehicle weight is the major contributor to conservation, it is argued that safety considerations limit vehicle size reduction. The engine thus remains an important component in meeting the needs of the new century; it is the primary subject of this lecture. The lecture first specifies those areas of engine design which provide the best opportunities for changes that will meet the needs of fuel economy and reduced emissions at an affordable cost. The discussion then concentrates on defining the pathways to achieving such goals. In particular, the tools available to perform the needed studies are discussed. The lecture ends with a discussion of the types of programs and methods of technical interchange required to produce a new generation of engines. [S0742-4795(00)00202-7]


1998 ◽  
Vol 1641 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Kevin Stork ◽  
Margaret Singh ◽  
Michael Wang ◽  
Anant Vyas

An assessment of the capital requirements associated with six different fuels in light-duty vehicles being developed by the Partnership for a New Generation of Vehicles to achieve tripled fuel economy is presented. The six fuels include two petroleum-based fuels (reformulated gasoline and low-sulfur diesel) and four alternative fuels (methanol, ethanol, dimethyl ether, and hydrogen). Estimates of the cumulative capital needs for establishing fuel production and distribution infrastructure to accommodate the fuel needs of tripled fuel economy (3X) vehicles are developed. Two levels of fuel volume—11 000 m3 (70,000 barrels) per day and 254 000 m3 (1.6 million barrels) per day—were established for meeting 3X-vehicle fuel demand. As expected, infrastructure capital needs for the high fuel demand level are much higher than for the low fuel demand level. Between fuel production infrastructure and distribution infrastructure, capital needs for the former far exceed those for the latter. Among the four alternative fuels, hydrogen bears the largest capital needs for production and distribution infrastructure.


2019 ◽  
Vol 100 (6) ◽  
pp. 1061-1077 ◽  
Author(s):  
Bjorn Stevens ◽  
Felix Ament ◽  
Sandrine Bony ◽  
Susanne Crewell ◽  
Florian Ewald ◽  
...  

AbstractA configuration of the High-Altitude Long-Range Research Aircraft (HALO) as a remote sensing cloud observatory is described, and its use is illustrated with results from the first and second Next-Generation Aircraft Remote Sensing for Validation (NARVAL) field studies. Measurements from the second NARVAL (NARVAL2) are used to highlight the ability of HALO, when configured in this fashion, to characterize not only the distribution of water condensate in the atmosphere, but also its impact on radiant energy transfer and the covarying large-scale meteorological conditions—including the large-scale velocity field and its vertical component. The NARVAL campaigns with HALO demonstrate the potential of airborne cloud observatories to address long-standing riddles in studies of the coupling between clouds and circulation and are helping to motivate a new generation of field studies.


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