(1)
The installation of the rocket engine has been approved and it has been esta-blished by .ight test that the rocket engine and its controls can be operated safely and reliably at the increase in maximum weight; and
(2)
The Airplane Flight Manual, or the placard, markings or manuals required in place thereof, set forth in addition to any other operating limitations the Administrator may require, the increased weight approved under this regula-tion and a prohibition against the operation of the airplane at the approved increased weight when–
(i)
The installed standby power rocket engines have been stored or installed in excess of the time limit established by the manufacturer of the rocket engine(usually stenciled onthe engine casing); or
(ii)
The rocket engine fuel has been expended or discharged.
(b)
The currently approved maximum takeo. and landing weights at which an airplane iscerti.cated without astandbypowerrocket engineinstallationmaybeincreased by an amount that does not exceed any of the following :
(1)
An amount equal in pounds to 0.014 IN, where I is the maximum usable impulse in pounds-seconds available from each standby power rocket engine and N is the number of rocket engines installed.
(2)
An amount equal to 5 percent of the maximum certi.cated weight approved in accordance with the applicable airworthiness regulations without standby power rocket engines installed.
(3)
An amount equal to the weight of the rocket engine installation.
(4)
An amountthat,together withthe currentlyapprovedmaximum weight, would equal the maximum structural weight established for the airplane without standby rocket engines installed.]
Amdt. 25-6, E.. 8/1/65
FAR 25.E2 : [Appendix E, II–Performance Credit for Transport Category Airplanes Equipped With Standby Power.]
[The Administrator may grant performance credit for the use of standby power on transport category airplanes. However, the performance credit applies only to the maxi-mum certi.cated takeo. and landing weights, the takeo.distance, and the takeo.paths, and may not exceed that found by the Administrator to result in an overall level of sa-fety in the takeo., approach, and landing regimes of .ight equivalent to that prescribed in the regulations under which the airplane was originally certi.cated without standby power.Forthepurposesof thisAppendix, ”standbypower” ispowerorthrust,orboth, obtained from rocket engines for a relatively short period and actuated only in cases of emergency. The following provisions apply :
(1) Takeo.; general. The takeo. data prescribed in paragraphs (2) and (3) must be determined at all weightsand altitudes,and at ambienttemperaturesif applicable, at which performance credit is to be applied.
(2)
Takeo. path.
(a)
The one-engine-inoperative takeo. path with standby power in use must be determinedin accordance with theperformance requirements of the applicable airworthiness regulations.
(b)
The one-engine-inoperative takeo. path (excluding that part where the air-planeis on orjust above the takeo. surface) determinedin accordance with paragraph(a)of this section mustlie above the one-engine-inoperative takeo. path without standby power at the maximum takeo. weight at which all of the applicable airworthiness requirements are met. For the purpose of this comparison,the .ightpathisconsidered toextend toatleastaheightof400 feet above the takeo. surface.
(c)
The takeo.path with all engines operating,but without the use of standbypo-wer, must re.ect a conservativelygreater overalllevel ofperformance than the one-engine-inoperativetakeo.path establishedin accordancewithparagraph
(a) of this section. The margin must be established by the Administrator to insure safe day-to-day operations, but in no case may it be less than 15 percent.The all-engines-operatingtakeo.path mustbedeterminedby apro-cedure consistent withthat establishedin complying withparagraph(a) of this section. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：FAA规章 美国联邦航空规章 Federal Aviation Regulations 4(45)
