National Advisory Committee for Aeronautics (NACA) - 2 Matching Results

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Measurement of knock characteristics in spark-ignition engines

Description: This paper presents a discussion of three potential sources of error in recording engine knocking which are: the natural oscillation of the membrane, the shock process between test contacts, and the danger of burned contacts. Following this discussion, the paper calls attention to various results which make the bouncing-pin indicator appear fundamentally unsuitable for recording knock phenomena.
Date: March 1, 1940
Creator: Schutz, R
Partner: UNT Libraries Government Documents Department

The shock-absorbed system of the airplane landing gear

Description: A discussion is given of the behavior of the shock-absorbing system, consisting of elastic struts and tires, under landing, take-off, and taxying conditions, and a general formula derived for obtaining the minimum stroke required to satisfy the conditions imposed on the landing gear. Finally, the operation of some typical shock-absorbing systems are examined and the necessity brought out for taking into account, in dynamic landing-gear tests, the effect of the wing lift at the instant of contact with the ground.
Date: March 1, 1940
Creator: Callerio, Pietro
Partner: UNT Libraries Government Documents Department