14 CFR § 25.1511 - Flap extended speed.

---
identifier: "/us/cfr/t14/s25.1511"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 25.1511 - Flap extended speed."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "25.1511"
section_name: "Flap extended speed."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "AIRCRAFT"
part_number: "25"
part_name: "AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note)."
regulatory_source: "Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted."
cfr_part: "25"
---


# 25.1511 Flap extended speed.

The established flap extended speed *V*<sub>FE</sub> must be established so that it does not exceed the design flap speed *V*<sub>F</sub> chosen under §§ 25.335(e) and 25.345, for the corresponding flap positions and engine powers.