What is the minimum limit vertical load factor for the braked roll condition when the rotorcraft is in the attitude specified in CS 29.479(a)(1)?

The limit vertical load factor must be at least 1.33 for the attitude specified in CS 29.479(a)(1).

For the braked roll condition, what is the required limit vertical load factor when the rotorcraft is in the attitude specified in CS 29.479(a)(2)?

The limit vertical load factor must be at least 1.0 for the attitude specified in CS 29.479(a)(2).

What is the coefficient of friction used to calculate the minimum drag load at the ground contact point of each wheel with brakes during braked roll?

The coefficient of friction is 0.8.

What is the alternative to the vertical load times 0.8 coefficient of friction when determining the minimum drag load for braked roll conditions?

The alternative is the maximum value based on limiting brake torque.

For the braked roll condition, what is the required limit vertical load factor for the attitude specified in CS 29.479(a)(1) versus the attitude in CS 29.479(a)(2)?

For CS 29.479(a)(1) the factor is at least 1.33, and for CS 29.479(a)(2) the factor is at least 1.0.

Does the braked roll condition require the shock absorbers to be in a specific position?

Yes, the braked roll conditions are specified with the shock absorbers in their static positions.

What is the minimum drag load requirement at the ground contact point of each wheel with brakes when the vertical load is known?

The drag load must be at least the lesser of the vertical load multiplied by 0.8, or the maximum value based on limiting brake torque.

What is the basis for the limit vertical load under braked roll conditions?

The limit vertical load must be based on a load factor of at least 1.33 for the attitude in CS 29.479(a)(1) and at least 1.0 for the attitude in CS 29.479(a)(2).

CS 29.493 Braked roll conditions

Q: Under braked roll conditions, what is the minimum drag load that the structure must withstand at the ground contact point of each wheel with brakes?

The structure must be designed to withstand a drag load of at least the lesser of: (1) the vertical load multiplied by a coefficient of friction of 0.8, and (2) the maximum value based on limiting brake torque.

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CS 29.493 Braked roll conditions

ED Decision 2003/16/RM

Under braked roll conditions with the shock absorbers in their static positions:

(a) The limit vertical load must be based on a load factor of at least –

(1) 1.33, for the attitude specified in CS 29.479(a)(1); and

(2) 1.0, for the attitude specified in CS 29.479(a)(2); and

(b) The structure must be designed to withstand, at the ground contact point of each wheel with brakes, a drag load of at least the lesser of:

(1) The vertical load multiplied by a coefficient of friction of 0.8; and

(2) The maximum value based on limiting brake torque.

Details

Source-Title: CS 29.493 Braked roll conditions View latest amendments

Erulesid: ERULES-1963177438-5440 Compare versions

Domain: Initial airworthiness

Amendedby: Initial issue

Applicabilitydate: 14 November, 2003

Entryintoforcedate: 14 November, 2003

Regulatorysource: ED Decision 2003/16/RM Navigate

Regulatorysubject: CS-29

Typeofcontent: CS (Certification specification)

Origin: EASA

Category: EAR