Guidelines on the marking of aircraft powerplant instruments (displays)

Original publisher: [Washington, D.C.]: U.S. Dept. of Transportation, Federal Aviation Administration, [1985]. OCLC Number: (OCoLC)262468291 Subject: Airplanes -- Electronic equipment. Excerpt: ... g / 30 / 85 AC 20088A For propeller driven small airplanes which must meet the requirements in Appendix F to Part 36 of the FAR at maximum normal operating power, from the corrected rotational speed used to establish the aircraft noise level to the minimum recommended for continuous operation ( except in the restricted ranges, if any ). Yellow Arc-From maximum rotational speed for continuous operation to maximum permissible rotational speed. Yellow Arc-Conditional operating range for one engine inoperative ( Offset ) flight that exists above the normal takeoff rating limit ( if applicable ). Red Arc-Range ( s ) in which operation is restricted, except to pass through, for all operating conditions because of excessive stresses, etc. h a Tachometer ( Turbine Engine Aircraft ) Dashed Red-At maximum permissible rotational speed ( 9'0 r.p.m. ) for Radial conditional operation ( if applicable ). Red Radial-At the normal maximum permissible rotational speed. Green Arc-From maximum rotational speed for continuous operation to minimum rotational speed recommended for continuous operation. Yellow Arc-From maximum rotational speed for continuous operation to maximum permissible rotational speed. Yellow Arc-Conditional operating range that exists above the normal ( Offset ) takeoff rating limit ( if applicable ). i. Turboprop and Turboshaft Engine Torque Indicator ( Reciprocating, Aircraft ) Dashed Red-At maximum permissible torque limit for conditional Radial operation ( if applicable ). Red Radial-At the normal maximum permissible torque limit.-From maximum torque limit for continuous operation to the Green Arc minimum recommended torque value. For propeller driven small airplanes which must meet the requirements in Appgndix F to Part 36 of the FAR at maximum normal operating...