Flight aid systems for aircraft

摘要

854,905. Aircraft flight aid systems. SPERRY RAND CORPORATION. Jan. 1, 1957 [Jan. 3, 1956], No. 19738/60. Divided out of 854,904. Drawings to Specification. Class 40 (1). [Also in Group XXXIII] The description is the same as that of Specification 854,904 but the claims are for a system comprising means for supplying an error signal corresponding to the difference between actual and desired airspeed, and means for deriving an output signal proportional to the algebraic sum of this error signal and a further signal representing the pitch attitude of the craft. The system is particularly suitable for enabling the pilot of a helicopter to approach and maintain a desired airspeed. Specifications 854,906 and 854,907 also are referred to.