This handbook, published as Advisory Circular 61-13B, was prepared as a technical manual for applicants who are preparing for their private, commercial, or flight instructor pilot certificates with a helicopter rating. Certificated helicopter flight instructors may find this handbook a valuable aid in training students, since detailed coverage of helicopter aerodynamics, performance, and flight maneuvers are included. Items such as weather, navigation, radio navigation and communications, use of flight information publications, and pertinent Federal Aviation Regulations are not included. These topics, with the exception of regulations, are included in the FAA publication, Pilot's Handbook of Aeronautical Knowledge, AC 61-23 and in other FAA publications.

Comments about Advisory Circular 61-13B should be sent to:

U.S. Department of Transportation

Federal Aviation Administration

Flight Standards National Field Office

Examinations Standards Branch, P.O. Box 25082

Oklahoma City, Oklahoma 73125

Advisory Circular 61-13A dated 1973 (same subject) is canceled.