# 14 C.F.R. § 27.351 (2026): Yawing conditions

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_351

## Section

- **Citation:** 14 C.F.R. § 27.351 (2026)
- **Heading:** Yawing conditions
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 14 CFR: Aeronautics and Space / Chapter I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 27: AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT / Subpart C: Strength Requirements / § 27.351: § 27.351   Yawing conditions.

## Text

(a) Each rotorcraft must be designed for the loads resulting from the maneuvers specified in paragraphs (b) and (c) of this section with—
(1) Unbalanced aerodynamic moments about the center of gravity which the aircraft reacts to in a rational or conservative manner considering the principal masses furnishing the reacting inertia forces; and
(2) Maximum main rotor speed.
(b) To produce the load required in paragraph (a) of this section, in unaccelerated flight with zero yaw, at forward speeds from zero up to 0.6 V
NE
—
(1) Displace the cockpit directional control suddenly to the maximum deflection limited by the control stops or by the maximum pilot force specified in § 27.397(a);
(2) Attain a resulting sideslip angle or 90°, whichever is less; and
(3) Return the directional control suddenly to neutral.
(c) To produce the load required in paragraph (a) of this section, in unaccelerated flight with zero yaw, at forward speeds from 0.6 V
NE
up to V
NE
or V
H
, whichever is less—
(1) Displace the cockpit directional control suddenly to the maximum deflection limited by the control stops or by the maximum pilot force specified in § 27.397(a);
(2) Attain a resulting sideslip angle or 15°, whichever is less, at the lesser speed of V
NE
or V
H
;
(3) Vary the sideslip angles of paragraphs (b)(2) and (c)(2) of this section directly with speed; and
(4) Return the directional control suddenly to neutral.
[Amdt. 27-26, 55 FR 7999, Mar. 6, 1990, as amended by Amdt. 27-34, 62 FR 46173, Aug. 29, 1997]

## Nearby sections

- [14 C.F.R. § 27.301 (2026) § 27.301   Loads.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_301.md)
- [14 C.F.R. § 27.303 (2026) § 27.303   Factor of safety.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_303.md)
- [14 C.F.R. § 27.305 (2026) § 27.305   Strength and deformation.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_305.md)
- [14 C.F.R. § 27.307 (2026) § 27.307   Proof of structure.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_307.md)
- [14 C.F.R. § 27.309 (2026) § 27.309   Design limitations.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_309.md)
- [14 C.F.R. § 27.321 (2026) § 27.321   General.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_321.md)
- [14 C.F.R. § 27.337 (2026) § 27.337   Limit maneuvering load factor.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_337.md)
- [14 C.F.R. § 27.339 (2026) § 27.339   Resultant limit maneuvering loads.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_339.md)
- [14 C.F.R. § 27.341 (2026) § 27.341   Gust loads.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_341.md)
- [14 C.F.R. § 27.351 (2026) § 27.351   Yawing conditions.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_351.md)
- [14 C.F.R. § 27.361 (2026) § 27.361   Engine torque.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_361.md)
- [14 C.F.R. § 27.391 (2026) § 27.391   General.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_391.md)
- [14 C.F.R. § 27.395 (2026) § 27.395   Control system.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_395.md)
- [14 C.F.R. § 27.397 (2026) § 27.397   Limit pilot forces and torques.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_397.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_351. Check the current official text before relying on it. Not legal advice.