Accession Number:

AD0725207

Title:

Helicopter Lift-Margin System. Volume II.

Descriptive Note:

Final rept.,

Corporate Author:

TRANS-SONICS INC BURLINGTON MASS

Report Date:

1970-12-01

Pagination or Media Count:

161.0

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

Subject Categories:

  • Flight Control and Instrumentation
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE