---
kind: "section"
citation: "14 C.F.R. § 25.531"
title: "14"
number: "25.531"
heading: "Hull and main float takeoff condition."
url: "https://uscodex.org/cfr/14/25.531"
---

# §25.531. Hull and main float takeoff condition.


For the wing and its attachment to the hull or main float—

- (a) The aerodynamic wing lift is assumed to be zero; and
- (b) A downward inertia load, corresponding to a load factor computed from the following formula, must be applied:

## Notes

### Amendments

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-23, 35 FR 5673, Apr. 8, 1970]

### Authority

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).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.

### Amendments

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-23, 35 FR 5673, Apr. 8, 1970]