Browse Topic: Performance upgrades

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Taking Heavy Duty Diesel Engine Oil Performance to the Next Level, Part 2: Optimizing for Universal Applicability2014-01-279510/13/2014
Advancement in Heavy Duty Diesel Engine Oils has, for approximately two decades, been driven by the ever more stringent emission legislation for NOx and Particulates. Over the last few years, the focus has shifted to reducing CO2 emissions and reducing operating cost by improving the engine's fuel economy. With fuel economy as an important new technology driver, the industry is exploring and introducing diesel engine oils of viscosity grades that used to be applied solely in passenger car engines, such as SAE 10W-30 and even SAE 5W-30. To avoid misapplication, API has decided that heavy duty diesel engine oils, most of which are formulated close to the maximum 0.12% phosphorus limit in the API C specification, can no longer add the API S gasoline engine claim. The only way to create a lubricant that carries both an API C and S claim for mixed fleet or municipality application, is to formulate at less than 0.08% phosphorus, a limit that was adopted in API S specifications because there
van Dam, Wim, Booth, James, Pitta, Jimmy, Parsons, Gary
Bizjets Wait for the Uplift13AERD1202_0212/01/2013
A look at how the global executive jet market is fighting back after a hard few years. The past two decades saw the market for new business jets explode, with corporate customers discovering and embracing the value of a tool that could bypass the congestion and frustrations of airline travel, going more directly where they wanted to go, and allowing work to continue along the way. It seemed a perfect win-win situation for busy executives who could arrive at a destination refreshed and prepared for that important meeting, and for companies who could increase the productivity of their senior management at a competitive cost compared to using premium airfares on every trip. Added to the rapid rise in company-owned business aircraft were a host of new “fly-as-you-go” air-taxi and fractional operators offering competitive rates for hired-out aircraft that came with crews, and all administrative and support functions taken care of.
Gardner, Richard
LED Light Engine StandardizationTBMG-1417905/01/2012
After Nick Holonyak invented the practical visible LED in 1962, the first commercial products were limited in brightness and only to applications such as red indicator lights and seven segment displays. In the 1970’s, yellow and green LEDs joined the family and were designed into products such as calculators, but still were not able to produce ambient light.
Upgrades of Two Computer Codes for Analysis of TurbomachineryTBMG-2920410/01/2005
Major upgrades have been made in two of the programs reported in "Five Computer Codes for Analysis of Turbomachinery" (LEW-16851), NASA Tech Briefs, Vol. 23, No. 11 (November 1999), page 28. The affected programs are:
Improved Fiber-Pigtailed Non-Planar Ring Oscillator LaserTBMG-2965610/01/2001
An improved non-planar ring oscillator (NPRO) of the fiber-pigtailed type has been developed. The improvements over prior lasers of this type lie in details of design and construction that are intended to enhance mechanical stability and thereby increase the stability of optical performance.
Safety Performance of Laminated Glass Configurations67091202/01/1967
Impact performance of a large variety of interlayer combinations laminated with annealed plate, heat strengthened, and fully tempered glasses has been analyzed for acceleration pulses, “severity index,” and penetration. These tests, conducted at 0, 70, and 120 F, indicate that small interlayer thickness changes are most effective in upgrading performance. Severity index numbers well below 1000 were calculated for laminated safety glass with interlayer thickness as high as 0.120 in. Highly localized bending of glass panels during impact with the 22 lb headform has been recorded through high-speed photography as reflected grid board distortion. Lacerative potential of laminated safety glass is being evaluated by using a simulated tissue developed through studies of human tissue.
Rieser, R. G., Chabal, J.
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