# 14 CFR § 27.309: Design limitations

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-14-27.309

## Section

- **Citation:** 14 CFR § 27.309
- **Heading:** Design limitations
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 14—Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER C—AIRCRAFT > PART 27—AIRWORTHINESS STANDARDS: NORMAL CATEGORY ROTORCRAFT > Subpart C—Strength Requirements > General

## 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 CFR § 27.301 § 27.301 Loads.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.301.md)
- [14 CFR § 27.303 § 27.303 Factor of safety.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.303.md)
- [14 CFR § 27.305 § 27.305 Strength and deformation.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.305.md)
- [14 CFR § 27.307 § 27.307 Proof of structure.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.307.md)
- [14 CFR § 27.309 § 27.309 Design limitations.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.309.md)
- [14 CFR § 27.321 § 27.321 General.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.321.md)
- [14 CFR § 27.337 § 27.337 Limit maneuvering load factor.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.337.md)
- [14 CFR § 27.339 § 27.339 Resultant limit maneuvering loads.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.339.md)
- [14 CFR § 27.341 § 27.341 Gust loads.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.341.md)
- [14 CFR § 27.351 § 27.351 Yawing conditions.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.351.md)
- [14 CFR § 27.361 § 27.361 Engine torque.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.361.md)
- [14 CFR § 27.391 § 27.391 General.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.391.md)
- [14 CFR § 27.395 § 27.395 Control system.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.395.md)
- [14 CFR § 27.397 § 27.397 Limit pilot forces and torques.](https://www.frixlaw.com/law-library/statutes/ecfr-14-27.397.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-14-27.309. Check the current official text before relying on it. Not legal advice.