Auxiliary nose undercarriage, a force-transmission structure, and a rotary wing aircraft

摘要

A steerable auxiliary nose undercarriage ( 2 ) for a rotary wing aircraft ( 1 ); the undercarriage ( 2 ) being retractable substantially rearwards. In the undercarriage ( 2 ), an oscillating system ( 13 ) presents a elevation stroke ( 58 ) about its hinged front end ( 52 ) that is greater than a shock absorbing stroke ( 59 ), and a shock-absorbing actuator ( 9 ) possesses retraction means for going beyond a high abutment position of the oscillating system ( 13 ) so that the oscillating system ( 13 ) and the shock-absorbing actuator ( 9 ) provide both a shock-absorption function and an undercarriage retraction function.