{"data":{"id":"us/14-cfr-29.175","jurisdiction":"us","citation":"14 CFR 29.175","heading":"Demonstration of static longitudinal stability.","body":"(a) Climb. Static longitudinal stability must be shown in the climb condition at speeds from Vy − 10 kt to Vy + 10 kt with—\n(1) Critical weight;\n(2) Critical center of gravity;\n(3) Maximum continuous power;\n(4) The landing gear retracted; and\n(5) The rotorcraft trimmed at Vy.\n(b) Cruise. Static longitudinal stability must be shown in the cruise condition at speeds from 0.8 VNE−10 kt to 0.8 VNE + 10 kt or, if VH is less than 0.8 VNE, from VH − 10 kt to VH + 10 kt, with—\n(1) Critical weight;\n(2) Critical center of gravity;\n(3) Power for level flight at 0.8 VNE or VH, whichever is less;\n(4) The landing gear retracted; and\n(5) The rotorcraft trimmed at 0.8 VNE or VH, whichever is less.\n(c) VNE. Static longitudinal stability must be shown at speeds from VNE − 20 kt to VNE with—\n(1) Critical weight;\n(2) Critical center of gravity;\n(3) Power required for level flight at VNE − 10 kt or maximum continuous power, whichever is less;\n(4) The landing gear retracted; and\n(5) The rotorcraft trimmed at VNE − 10 kt.\n(d) Autorotation. Static longitudinal stability must be shown in autorotation at—\n(1) Airspeeds from the minimum rate of descent airspeed − 10 kt to the minimum rate of descent airspeed + 10 kt, with—\n(i) Critical weight;\n(ii) Critical center of gravity;\n(iii) The landing gear extended; and\n(iv) The rotorcraft trimmed at the minimum rate of descent airspeed.\n(2) Airspeeds from the best angle-of-glide airspeed − 10kt to the best angle-of-glide airspeed + 10kt, with—\n(i) Critical weight;\n(ii) Critical center of gravity;\n(iii) The landing gear retracted; and\n(iv) The rotorcraft trimmed at the best angle-of-glide airspeed.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 29—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT","Subpart B—Flight"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"d1354238cd9eaa8773ab67e7c32d6f3c29b37255c4e84ef7656c0fa53dcb70cc","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-29.173","next":"us/14-cfr-29.177"},"notice":"GroundRules: Original legal text. Not legal advice."}