# 14 C.F.R. § 27.309 (2026): Design limitations

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P27_S27_309

## Section

- **Citation:** 14 C.F.R. § 27.309 (2026)
- **Heading:** Design limitations
- **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 / § 27.309: § 27.309   Design limitations.

## Text

The following values and limitations must be established to show compliance with the structural requirements of this subpart:
(a) The design maximum weight.
(b) The main rotor r.p.m. ranges power on and power off.
(c) The maximum forward speeds for each main rotor r.p.m. within the ranges determined under paragraph (b) of this section.
(d) The maximum rearward and sideward flight speeds.
(e) The center of gravity limits corresponding to the limitations determined under paragraphs (b), (c), and (d) of this section.
(f) The rotational speed ratios between each powerplant and each connected rotating component.
(g) The positive and negative limit maneuvering load factors.

## 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_309. Check the current official text before relying on it. Not legal advice.