Helicopter Lift-Margin System. Volume II.
Abstract
Helicopter power requirements are generally maximum when hovering out of ground effect. Thus, takeoff and landing maneuvers are the most critical, since the power requirements may not be clear to the pilot at the time he must make the corresponding decisions. Power deficiencies at takeoff or landing are very hazardous. To maximize safety of takeoff and landing operations, a system has been devised which presents to the pilot his lift margin, a figure which represents the excess weight which could be accommodated under locally-existing barometric pressure, outside-air-temperature conditions, and rotor system condition. The system includes two kinds of compensators of which the first corrects available engine torque for ambient conditions and the second makes a similar correction for the ratio of gross weight to required power. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0725207
Entities
People
- Bradford W. Edgerton
- Sidney B. Williams