Abstract: This paper discusses some aspects of nose-wheel shimmy and shimmy damper, including the dynamic analysis for taxi,and the steering for nose-gear etc., especially what the technicians in the speciality of aircraft undercarriage are concerned with.Besides a brief review of the theories and the preventions of nose-wheel shimmy,the author also points out that there are some mistakes in the literatures dealing with the dynamic analysis of the taxi problem of aircrafts and presents some explanations to clear up them.However,the contents consist of only some brief comments, key points or references, but not an introduction in detail.