§ 25.405. Secondary control system.
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/us/cfr/t14/s§ 25.405·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Secondary controls, such as wheel brake, spoiler, and tab controls, must be designed for the maximum forces that a pilot is likely to apply to those controls. The following values may be used: Pilot Control Force Limits (Secondary Controls) Control Limit pilot forces Miscellaneous: *Crank, wheel, or lever((1 + R) / 3) × 50 lbs., but not less than 50 lbs. nor more than 150 lbs. (R = radius). (Applicable to any angle within 20° of plane of control). Twist133 in.-lbs. Push-pullTo be chosen by applicant. *Limited to flap, tab, stabilizer, spoiler, and landing gear operation controls.