49.045 结构和结构元件 标准查询与下载
共找到 464 条与 结构和结构元件 相关的标准，共 31 页
This supplement forms a part of the Aerospace Recommended Practice ARP4737, Aircraft Deising/Anti-icing Methods. It shall be used to identify SAE Types I, II and IV fluids holdover time guidelines.
Aircraft Deicing/Anti-icing Methods (Supplement 1)
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- 49.045
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- V04
- 发布
- 2000-07-01
- 实施
The specific purpose of this AIR is to provide general background information to better acquaint those who are involved with ramp de-icing of aircraft. Because of the wide variance of atmospheric conditions at different airports, as well as any individual airport, the figures given are of a general nature only and are to be taken as a very rough guide to the various factors concerned with ramp de-icing.
Ramp De-Icing
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- 49.045
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- V50
- 发布
- 2000-03-01
- 实施
MIL-HDBK-762, dated 17 July 1990, has been reviewed and determined to be valid for use in acquistion.
DESIGN OF AERODYNAMICALLY STABILIZED FREE ROCKETS
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- 49.045
- CCS
- V43
- 发布
- 2000
- 实施
This minimum performance document defines the testing required for wheels, brakes, and wheel and brake assemblies to be used on civil aircraft certified under 14 Code of Federal Regulations (CFR) Part 23, 27, and 29.
Minimum Performance Recommendations for Part 23, 27, and 29 Aircraft Wheels, Brakes, and Wheel and Brake Assemblies
- ICS
- 49.045
- CCS
- V42
- 发布
- 2000
- 实施
This Aerospace Recommended Practice (ARP) defines lightning strike zones and provides guidelines for locating them on particular aircraft, together with examples. The zone definitions and location guidelines described herein are applicable to Parts 23, 25, 27, and 29 aircraft. The zone location guidelines and examples are representative of in-flight lightning exposures. The purpose of this ARP is to provide information to determine the lightning attachment zones which is referred to as Lightning Zoning. This ARP is used in conjunction with two other documents, ARP5412 and ARP5416 (DRAFT). The relationship between the three documents is shown in Figure 1. These three documents are used to define the aircraft lightning threat and tests required to support the aircraft lightning protection certification. Lightning zoning is a functional step in demonstrating that the aircraft is adequately protected from both direct and indirect effects of lightning. The purpose of lightning zoning is to determine the surfaces of the aircraft which are likely to experience lightning channel attachment and the structures which may experience lightning current conduction between pairs of entry/exit points. Zoning should be used with the aircraft hazard assessment to determine the appropriate protection for a given aircraft part or location. To determine the appropriate protection for parts and structure in a particular lightning zone, the criticality of the systems or structure in the zone should be considered.
Aircraft Lightning Zoning
- ICS
- 49.045
- CCS
- 发布
- 1999-12
- 实施
The environment and test waveforms defined in this SAE Aerospace Recommended Practice (ARP) account for the best lighting data and analysis currently available. The quantified environment and levels herein represent the minimum currently required by certifying authorities, consistent with the approach applied in related lightning documents. Lightning, like any natural phenomenon, is probabilistic in nature. Levels and waveforms vary considerably from one flash to the next. These standardized voltage and current waveforms have been derived to represent the lightning environment, and are used to assess the direct effects of lightning on aircraft. The standardized external current waveforms have in turn been used to derive standardized transient voltage and current waveforms which can be expected to appear on the cable bundles and at equipment interfaces. In addition, test waveforms based on current industry best practice are included to supplement these waveforms that are derived directly from the lightning environment. Considerations such as testability and important waveform characteristics that can demonstrate lightning design effectiveness are taken into account. The parameters of the standardized waveforms, both external and derived transients, represent severe versions of each of the characteristics of natural lightning flashes and include all parameters of interest with respect to lightning protection for aircraft. However, it should be noted that in every case more severe versions of each of the characteristics of the standardized waveforms have been recorded in natural lightning flashes as well as additional parameters such as electric field effects in non-conductive structures. The test waveforms provided in this ARP are considered to be adequate for the demonstration of compliance for the protection of an aircraft and its systems against the lightning environment and should be applied in accordance with the aircraft lightning strike zones (see ARP5414) and test methods (see ARP5416 (DRAFT)), and applicable FAA and JAA advisory and interpretive material. This ARP is one of the set of three documents covering the whole spectrum of aircraft interaction with lightning. The purpose of this ARP is to provide the characteristics of lightning that are encountered by aircraft as well as transients appearing at the interfaces of equipment associated with electrical/electronic systems as a result of that interaction. These characteristics are referred to as the aircraft lightning environment. The two other documents provide information on aircraft lightning zoning (see ARP5414) and aircraft lightning testing (see ARP5416 (DRAFT)). The relationship between the three documents is shown in Figure 1.
Aircraft Lightning Environment and Related Test Waveforms
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- 49.045
- CCS
- 发布
- 1999-11
- 实施
