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  • General Chemistry  (36)
  • Propellants and Fuels  (3)
  • Air Transportation and Safety
  • 1945-1949  (41)
  • 1946  (2)
  • 1945  (39)
Collection
Keywords
Publisher
Years
  • 1945-1949  (41)
Year
  • 1
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    Unknown
    A Method of Analysis of V-G Records from Transport Operations (1945)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: A method has been developed for interpreting V-G records taken during the course of commercial transport operation. This method involves the utilization of fairly simple statistical procedures to obtain "flight envelopes," which predict that, on the average, in a stated number of flight hours, one value of airspeed will exceed the envelope, and one positive and one negative acceleration increment will exceed the envelope with equal probability of being experienced at any airspeed. Comparison with the actual data obtained from various airplanes and from various airlines indicates that these envelopes predict the occurrences of large values of acceleration and airspeed with a high degree of accuracy.
    Keywords: Air Transportation and Safety
    Type: NACA-TR-807
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    An Investigation of the Icing and Heated-air De-icing Characteristics of the R-2600-13 Induction System (1946)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A laboratory investigation was made on a Holley 1685-HB carburetor mounted on an R-2600-13 supercharger assembly to determine the icing characteristics and the heated-air de-icing requirements of this portion of the B-25D airplane induction system. Icing has been found to be most prevalent at relatively small throttle openings and, consequently, all runs were made at simulated 60-percent normal rated power condition. Icing characteristics were determined during a series of 15-minute runs over a range of inlet-air conditions. For the de-icing investigation severe impact ice was allowed to form in the induction system and the time required for the recovery of 95 percent of the maximum possible air flow at the original throttle setting was then determined for a range of wet-bulb temperatures. Results of these runs showed that ice on the walls of the carburetor adapter and on the rim of the impeller-shroud portion of the supercharger diffuser plate did not affect engine operation at 60-percent normal rated power. Ice that adversely affected the air flow and the fuel-air ratio was formed only on the central web of the carburetor and then only when the inlet air was saturated or contained free moisture in excess of saturation. No serious ice formations were observed at inlet-air temperatures above 66 0 F or with an inlet-air enthalpy greater than 34 Btu per pound. The maximum temperature at. which any trace of icing could be detected was 1110 F with a relative humidity of approximately 28 percent, The air-flow recovery time for emergency de-icing was 0.3 minute for.an enthalpy of 35 Btu per pound or wet-bulb temperature of 68 0 F. Further increase in enthalpy and wet-bulb temperature above these values resulted in very slight improvement in recovery time. The fuel-air ratio restored by a 5-Minute application of heated air was approximately 7 percent less than the initial value for cold-air conditions.
    Keywords: Air Transportation and Safety
    Type: NACA-RM-E6K11
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Knock-Limited Performance of Triptane and Xylidines Blended with 28-R Aviation Fuel at High Compression Ratios and Maximum-Economy Spark Setting (1946)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: An investigation was conducted to evaluate the possibilities of utilizing the high-performance characteristics of triptane and xylidines blended with 28-R fuel in order to increase fuel economy by the use of high compression ratios and maximum-economy spark setting. Full-scale single-cylinder knock tests were run with 20 deg B.T.C. and maximum-economy spark settings at compression ratios of 6.9, 8.0, and 10.0, and with two inlet-air temperatures. The fuels tested consisted of triptane, four triptane and one xylidines blend with 28-R, and 28-R fuel alone. Indicated specific fuel consumption at lean mixtures was decreased approximately 17 percent at a compression ratio of 10.0 and maximum-economy spark setting, as compared to that obtained with a compression ratio of 6.9 and normal spark setting. When compression ratio was increased from 6.9 to 10.0 at an inlet-air temperature of 150 F, normal spark setting, and a fuel-air ratio of 0.065, 55-percent triptane was required with 28-R fuel to maintain the knock-limited brake power level obtained with 28-R fuel at a compression ratio of 6.9. Brake specific fuel consumption was decreased 17.5 percent at a compression ratio of 10.0 relative to that obtained at a compression ratio of 6.9. Approximately similar results were noted at an inlet-air temperature of 250 F. For concentrations up through at least 20 percent, triptane can be more efficiently used at normal than at maximum-economy spark setting to maintain a constant knock-limited power output over the range of compression ratios tested.
    Keywords: Propellants and Fuels
    Type: NACA-RM-E6J07
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Effect of Water-Alcohol Injection and Maximum Economy Spark Advance on Knock-Limited Performance and Fuel Economy of a Large Air-Cooled Cylinder (1945)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An investigation was conducted to determine the effect of a coolant solution of 25 percent ethyl alcohol, 25 percent methyl alcohol, and 50 percent water by volume and maximum-economy spark advance on knock-limited performance and fuel economy of a large air-cooled cylinder. The knock-limited performance of the cylinder at engine speeds of 2100 and 2500 rpm was determined for coolant-fuel ratios of 0.0, 0.2, and 0.4. The effect of water-alcohol injection on fuel economy was determined in constant charge-air flow tests. The tests were conducted at a spark advance of 20 deg B.T.C. and maximum-economy spark advance.
    Keywords: Propellants and Fuels
    Type: NACA-WR-E-264 , NACA-MR-E5H12
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The Effect of Compression Ratio on Knock Limits of High-Performance Fuels in a CFR Engine II : Blends of 2,2,3-Trimethylpentane with 28-R (1945)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The knock-limited performance of blends of 0,50; and 100 percent by volume of 2,2,3-trimethylpentane in 28-R fuel determined with a modified F-4 engine at three sets of conditions varying from severe to mild at each of three compression ratios (6.0, 8.0, and 10.0). A comparison of the knock-limited performance of 2,2,3-trimethylpentane with that of triptane (2,2,3-trimethylbutane) is included. The knock-Limited performance of 2,2,3-trimethylpontane was usually more sensitive to either compression ratio or inlet-air temperature than 28-R fuel, but the ratio of the knock-limited indicated mean effective pressure of a given blend containing 2,2,3-trimethypentane and 28-R to the indicated mean effective pressure of 28-R alone was not greatly affected by compression ratio if the engine operating conditions were mild. Although 2,2,3-trimethylpentane in general had a lower knock-limited performance than triptane, the characteristics of the two fuels were somewhat similar.
    Keywords: Propellants and Fuels
    Type: NACA-WR-E-249 , NACA-MR-E5A10
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
    Electronic Resource
    Electronic Resource
    Masthead (1945)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 58 (1945) 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19450580101
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Symbiose und AntibioseAuszugsweise vorgetragen bei der Münchner Vortragsveranstaltung des VDCh am 16. Oktober 1943. (1945)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 58 (1945), S. 1-16 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19450580102
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Die Abtrennungsenergie einzelner Atome im Molekelverband am Beispiel des Methans (1945)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 58 (1945), S. 16-18 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19450580103
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Neue Erkenntnisse auf dem Gebiet der Wasserenthärtung mittels Soda (1945)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 58 (1945), S. 19-22 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19450580104
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Über den Einfluß des Eisens bei der Bestimmung von Ascorbinsäure (1945)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 58 (1945), S. 22-22 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19450580105
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    Paper (German National Licenses)
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