Development of a vertical static test bench for amateur rocket engines

Summary: Dynamic assessment is a diagnostic approach in which specific interventions are integrated into assessment procedures to estimate cognitive modifiability. The study investigates the utility of this approach in persons with compelling rehabilitational needs. Samples of schizophrenic patients and of elderly with and without dementia were assessed with dynamic versions of the Wisconsin Card Sorting Test and the Auditory Verbal Learning Test. Both tests were administered by applying specific procedures of verbal mediation designed to increase performance. Results demonstrated superior predictive validity with regard to proficiency in a clinical training in schizophrenic subjects and better discrimination of nondemented and demented elderly with the help of dynamic measures compared to static test scores. Subsequent correlational analyses indicated that, for both tests, performance change following intervention is related to the processing of verbal context information. Results are discussed with respect to the concept of verbal working memory as one component of the patients' rehabilitation potential.

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Simulation of propellant component utilization in the test bench environment by the gas injection into the engine feed lines

Kosmìčna nauka ì tehnologìâ ◽

10.15407/knit2003.01s.105 ◽

2003 ◽

Vol 9 (1s) ◽

pp. 105-108

Author(s):

Yu.A. Prokopenko ◽

◽

E.V. Strelchenko ◽

Keyword(s):

Test Bench ◽

Gas Injection

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DEVELOPMENT OF TEST FACILITIES FOR 5 KN-THRUST HYBRID ROCKET ENGINES AND A SWIRLING-OXIDIZER-FLOW-TYPE HYBRID ROCKET ENGINE FOR TECHNOLOGY DEMONSTRATION

International Journal of Energetic Materials and Chemical Propulsion ◽

10.1615/intjenergeticmaterialschemprop.2017011994 ◽

2016 ◽

Vol 15 (6) ◽

pp. 435-451 ◽

Cited By ~ 1

Author(s):

Koki Kitagawa ◽

Saburo Yuasa ◽

Takashi Sakurai ◽

S. Hatagaki ◽

N. Shiraishi ◽

...

Keyword(s):

Rocket Engine ◽

Rocket Engines ◽

Hybrid Rocket ◽

Flow Type ◽

Technology Demonstration ◽

Hybrid Rocket Engine

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Investigations of Road Wear Caused by Studded Tires

Tire Science and Technology ◽

10.2346/tire.14.420101 ◽

2014 ◽

Vol 42 (1) ◽

pp. 2-15

Author(s):

Johannes Gültlinger ◽

Frank Gauterin ◽

Christian Brandau ◽

Jan Schlittenhard ◽

Burkhard Wies

Keyword(s):

Traffic Safety ◽

Test Bench ◽

Operating Conditions ◽

Test Method ◽

Analytical Models ◽

The Road ◽

Driving Speed ◽

Major Factors ◽

Tire Friction ◽

Variable Operating Conditions

ABSTRACT The use of studded tires has been a subject of controversy from the time they came into market. While studded tires contribute to traffic safety under severe winter conditions by increasing tire friction on icy roads, they also cause damage to the road surface when running on bare roads. Consequently, one of the main challenges in studded tire development is to reduce road wear while still ensuring a good grip on ice. Therefore, a research project was initiated to gain understanding about the mechanisms and influencing parameters involved in road wear by studded tires. A test method using the institute's internal drum test bench was developed. Furthermore, mechanisms causing road wear by studded tires were derived from basic analytical models. These mechanisms were used to identify the main parameters influencing road wear by studded tires. Using experimental results obtained with the test method developed, the expected influences were verified. Vehicle driving speed and stud mass were found to be major factors influencing road wear. This can be explained by the stud impact as a dominant mechanism. By means of the test method presented, quantified and comparable data for road wear caused by studded tires under controllable conditions can be obtained. The mechanisms allow predicting the influence of tire construction and variable operating conditions on road wear.

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Analysis of the Impact of the Frequency Range of the Tensometer Bridge and Projectile Geometry on the Results of Measurements by the Split Hopkinson Pressure Bar Method

Metrology and Measurement Systems ◽

10.2478/mms-2013-0047 ◽

2013 ◽

Vol 20 (4) ◽

pp. 555-564 ◽

Cited By ~ 12

Author(s):

Wojciech Moćko

Keyword(s):

Test Bench ◽

Split Hopkinson Pressure Bar ◽

Dynamic Deformation ◽

Spectral Width ◽

Hopkinson Pressure Bar ◽

Computing Environment ◽

Split Hopkinson ◽

Pressure Bar ◽

The Impact ◽

Bench Model

Abstract The paper presents the results of the analysis of the striker shape impact on the shape of the mechanical elastic wave generated in the Hopkinson bar. The influence of the tensometer amplifier bandwidth on the stress-strain characteristics obtained in this method was analyzed too. For the purposes of analyzing under the computing environment ABAQUS / Explicit the test bench model was created, and then the analysis of the process of dynamic deformation of the specimen with specific mechanical parameters was carried out. Based on those tests, it was found that the geometry of the end of the striker has an effect on the form of the loading wave and the spectral width of the signal of that wave. Reduction of the striker end diameter reduces unwanted oscillations, however, adversely affects the time of strain rate stabilization. It was determined for the assumed test bench configuration that a tensometric measurement system with a bandwidth equal to 50 kHz is sufficient

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Steam generation with modified H2/O2-rocket engines

10.2514/6.1977-889 ◽

1977 ◽

Author(s):

J. REINKENHOF ◽

R. SCHMUCKER

Keyword(s):

Rocket Engines ◽

Steam Generation

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