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Strategies to Gain the Loss in Power in a Military Diesel Engine Using JP-8 Instead of ULSD

Wayne State University-Prasad D. Raut, Omkar A. Atre, Manan Trivedi, Naeim Henein
  • Technical Paper
  • 2020-01-0804
To be published on 2020-04-14 by SAE International in United States
The Department of Defense (DOD) has adopted the use of JP-8 under the “single battlefield fuel” policy. Fuel properties of JP-8 which are different from ULSD include cetane number, density, heating value and compressibility (Bulk modulus). While JP8 has advantages compared to ULSD, related to storage, combustion and lower soot emissions, its use cause a drop in the peak power in some military diesel engines. The engines that has loss in power use the Hydraulically actuated Electronic Unit Injection (HEUI) fuel system. The paper explains in details the operation of HEUI including fuel delivery into the injector and its compression to the high injection pressure before its delivery in the combustion chamber. The effect of fuel compressibility on the volume of the fuel that is injected into the combustion chamber is explained in details. A fuel such as JP-8 which has a lower Bulk modulus is compressed to a smaller volume than ULSD which has a higher Bulk modulus before its delivery in the combustion chamber, and this is the main reason for the drop…
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Balancing Lifecycle Sustainment Cost with Value of Information during Design Phase

CCDC Ground Vehicle Systems Center-Sam Kassoumeh, Monica Majcher, James Ealy, David Gorsich, Paramsothy Jayakumar
Oakland University-Vijitashwa Pandey
  • Technical Paper
  • 2020-01-0176
To be published on 2020-04-14 by SAE International in United States
The complete lifecycle of complex systems, such as ground vehicles, consists of multiple phases including design, manufacturing, operation and sustainment (O&S) and finally disposal. For many systems, the majority of the lifecycle costs are incurred during the operation and sustainment phase, specifically in the form of uncertain maintenance costs. Testing and analysis during the design phase, including reliability and supportability analysis, can have a major influence on costs during the O&S phase. However, the cost of the analysis itself must be reconciled with the expected benefits of the reduction in uncertainty. In this paper, we quantify the value of performing the tests and analyses in the design phase by treating it as imperfect information obtained to better estimate uncertain maintenance costs. A multi-attribute decision framework for military ground vehicles acquisition is employed to illustrate the methodology and the value of performing the analysis early in the system’s lifecycle. Attributes considered are maintenance cost and operational availability, while the utility is calculated for a risk averse decision maker. Numerical methods are employed to calculate the value…
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Facility Focus: Army Test and Evaluation Command

  • Magazine Article
  • TBMG-36193
Published 2020-03-01 by Tech Briefs Media Group in United States

The U.S. Army Test and Evaluation Command (ATEC) plans, integrates, and conducts experiments, developmental testing, independent operational testing, and independent evaluations and assessments to provide essential information to acquisition decision-makers and commanders.

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Report on Unmanned Ground Vehicle Reliability

Ground Vehicle Reliability Committee
  • Ground Vehicle Standard
  • J2958_202002
  • Current
Published 2020-02-24 by SAE International in United States
This information report is applicable to the reliability characteristics of unmanned ground vehicles.
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Barometry for Altimeter Calibration

A-4 Aircraft Instruments Committee
  • Aerospace Standard
  • AIR1075B
  • Current
Published 2020-02-20 by SAE International in United States
This SAE Aerospace Information Report (AIR) is concerned only with aspects directly relating to available accuracy. While well-designed photoelectric, inductive or capacitive readers and pressure regulators, and other accessories are highly desirable for convenience and production rate, they are considered to be outside the scope of this AIR.
This content contains downloadable datasets
Annotation ability available

Shoulder-Launched Weapon System

  • Magazine Article
  • TBMG-36061
Published 2020-02-01 by Tech Briefs Media Group in United States

Saab Stockholm, Sweden +46 13 18 00 00

Electronic Warfare Weapon

  • Magazine Article
  • TBMG-36068
Published 2020-02-01 by Tech Briefs Media Group in United States

MBDA Hertfordshire, UK +44 (0)1438 752000

Adding Context to Full-Motion Video for Improved Surveillance and Situational Awareness

  • Magazine Article
  • TBMG-36055
Published 2020-02-01 by Tech Briefs Media Group in United States

Today’s intelligence, surveillance, and reconnaissance (ISR) platforms integrate state-of-the-art technologies and subsystems into airborne platforms intended to observe, detect, identify, and neutralize threats. Full motion video (FMV) sensors are essential assets and are routinely used on fixed-wing, rotary-wing, and manned and unmanned platforms to provide real-time situational awareness with minimal latency.

Biofeedback Loops Aim to Enhance Combat and Sports Training

  • Magazine Article
  • TBMG-35957
Published 2020-02-01 by Tech Briefs Media Group in United States

Spinoff is NASA's annual publication featuring successfully commercialized NASA technology. This commercialization has contributed to the development of products and services in the fields of health and medicine, consumer goods, transportation, public safety, computer technology, and environmental resources.

The Impact of Cyber Cameras on the Intelligence Community

  • Magazine Article
  • TBMG-36065
Published 2020-02-01 by Tech Briefs Media Group in United States

The global arena has become a surveillance state as public spaces are littered with surveillance cameras and individuals are consumed with personal electronic devices, most of which have embedded cameras. The number of security surveillance systems has increased primarily for criminal deterrence and to assist law enforcement agencies.