Where-TirePressure: maximum airplane operating tirepressure(psi); μt/g: maximumtire-to-groundbraking coe.cient;
max
V : airplanetrueground speed(knots); and Linear interpolation may be used for tire pressures other than those listed.
(2) The maximumtire-to-groundwet runwaybraking coe.cient offriction mustbe adjusted to take into account the e.ciency of the anti-skid system on a wet runway. Anti-skid system operation must be demonstrated by .ight testing on a smooth wet runway, and its e.ciency must be determined. Unless a speci.c anti-skid system e.ciency is determined from a quantitative analysis of the .ight testing on a smooth wet runway, the maximum tire-to-ground wet runwaybraking coe.cient offrictiondeterminedinparagraph(c)(1) of this section must be multiplied by the e.ciency value associated with the type of anti-skid system installed on the airplane :
Type of anti-skid system E.ciency value
On-O. 0.30
Quasi-Modulating 0.50
Fully Modulating 0.80
(d) At the option of the applicant, a higher wet runway braking coe.cient of friction may be used for runway surfaces that have been grooved or treated with a porous friction course material. For grooved and porous friction course runways, the wet runway braking coe.cient of friction is de.ned as either :
(1) 70 percent of the dry runway braking coe.cient of friction used to determine the dry runway accelerate-stop distance; or
(2) The wet runwaybraking coe.cientde.nedinparagraph(c) ofthis section, except that a speci.c anti-skid system e.ciency, if determined, is appropriate for agrooved orporousfriction coursewetrunway,and the maximumtire-to-ground wet runway braking coe.cient of friction is de.ned as :
Tire Pres. (psi)
50 100 200
300
Maximum Braking Coe.cient (tire-to-ground)
()5 ()4 ()3 ()2 ()=0.1470 . 1.050 +2.673 . 2.683 +0.403 +0.859
VVVVV
μt/g100100 100 100 100
max
()5 ()4 ()3 ()2 ()=0.1106 . 0.813 +2.130 . 2.200 +0.317 +0.807
VVVVV
μt/g100100 100 100 100
max
()5 ()4 ()3 ()2 ()=0.0498 . 0.398 +1.140 . 1.285 +0.140 +0.701
VVVVV
μt/g100100 100 100 100
max
()5 ()4 ()3 ()2 ()=0.0314 . 0.247 +0.703 . 0.779 +0.00954 + 0.614
VVVV V μt/gmax 100 100 100 100100
′
Elodie Roux. Septembre 2003
Subpart B : Flight
Where– TirePressure: maximum airplane operating tirepressure(psi); μt/g: maximum tire-to-ground braking coe.cient;
max
V : airplanetrueground speed(knots); and Linear interpolation may be used for tire pressures other than those listed.
(e)
Exceptasprovidedinparagraph(f)(1) ofthis section, means otherthan wheelbrakes may be used to determine the accelerate-stop distance if that means–]
(1)
Is safe and reliable;
(2)
Is used so that consistent results can be expected under normal operating conditions; and
(3)
Is such that exceptional skill is not required to control the airplane.
(f)
[The e.ects ofavailable reverse thrust–
(1)
Shall notbeincluded as an additional means ofdeceleration whendetermining the accelerate-stop distance on a dry runway; and
(2)
May be included as an additional means of deceleration using recommended reverse thrust procedures when determining the accelerate-stop distance on a wet runway,providedthe requirements ofparagraph(e) ofthis section are met.]
(g)
[The landing gear must remain extended throughout the accelerate-stopdistance.
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本文链接地址：FAA规章 美国联邦航空规章 Federal Aviation Regulations 3(27)
