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Aerospace Engineering 2005-07-01

2005-07-01
Designing high-bypass nacelle inlets Simulation significantly reduces the time required of engineers at Goodrich to evaluate inlet performance and preliminary designs. Virtually eliminating prototypes IBM PLM Solutions developed by Dassault Systemes have enabled Dassault Aviation to meet the challenges of the executive business jet market with a new virtual platform. DOD looking for faster fixes The U.S. military is in the midst of a mighty push at its bases and depots to shorten the time it takes to get aircraft, trucks, tanks, and other weapon systems out the gate after they arrive for repair. A vision of military and civilian aviation tomorrow SAE 100 Future look: At Dessault Aviation, we believe the quest to fly "higher, faster, and further" that moved moved aviation's pioneers will continue to blaze new trails in the 21st century.
Magazine

Aerospace Engineering 2004-07-01

2004-07-01
More-electric small turbofan engines The aerospace industry demands continuous improvement of propulsion engines as well as timely response to the new and changing requirements for them. Zero-emissions aircraft Researchers explore the potential application of alternative fuels and propulsion systems for aircraft that include a business jet and single-engine propeller aircraft. Integration releases the reins Cessna's new Citation Mustang launches the company into a new market for business jets, helped by the latest PLM solutions from IBM. Military: general A military flight-control system proposed for use in general aviation uses inverse control to decouple the flight controls and to modify the handling qualities of the aircraft, while employing articficial neural networks to compensate for any modeling errors.
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Landing Gear Stability

1995-03-01
CURRENT
AIR4894
This SAE Aerospace Information Report (AIR) discusses the nature of landing gear stability, describes many common landing gear stability problems, and suggests approaches and methods for solving or avoiding them.
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AIRCRAFT TIRE CONDITION MONITORING SYSTEMS

1994-05-01
HISTORICAL
AIR4830
The intent of this SAE Aerospace Information Report (AIR) is to inform the aerospace industry about various systems available to monitor the inflation pressure or temperature of an aircraft tire. The tire pressure indicating system (TPIS), with cockpit display, is the most widely used of all aircraft tire monitoring systems, and is detailed in this document more than other systems.
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Compilation of Freezing Brake Experience and Potential Designs and Operating Procedures to Prevent Its Occurrence

2016-05-24
CURRENT
AIR4762A
This Aerospace Information Report (AIR) describes conditions under which freezing (frozen) brakes can occur and describes operating procedures which have been used to prevent or lessen the severity or probability of brake freezing. This document also identifies design features that some manufacturers implement to minimize the occurrence of freezing brakes. This document is not an Aerospace Recommended Practice (ARP) and therefore does not make recommendations based on a consensus of the industry. However, part of this document’s purpose is to describe the design and operational practices that some are using to minimize the risk of frozen brakes. NOTE: The following information is based upon experience gained across a wide-range of aircraft types and operational profiles, and should NOT take precedence over Aircraft Flight Manual or Flight Operations Procedures.
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Impulse Test Machine, Sine Wave, Equipment and Operation of

1992-01-27
CURRENT
AIR4298
This SAE Aerospace Information Report (AIR) describes equivalent type equipment and operational guidelines for a standard sine wave impulse test machine. The machine may be used for testing hydraulic tubing, fittings, hose assemblies, and similar fluid system components, if desired. The standard sine wave impulse test machine is established for the following purposes: 1 A design guide for future machines being built by manufacturers and users. 2 As a referee in the event of conflicting data from two or more nonstandard impulse machines. Such a referee machine might be built by an impartial testing activity.
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Development and Qualification of Composite Landing Gears

2016-01-04
WIP
AIR5552A
This information report provides general guidance for the design considerations, qualification in endurance, strength and fatigue of landing gear using composite components as principle structural elements. The information discussed herein includes the development and evaluation of design data considering: the potential for imbedded manufacturing defects, manufacturing process variations, the component operating environment, potential damage threats in service, rework and overhaul, and inspection processes. This AIR mainly discusses the use of thick composites for landing gear structural components. Considerations and recommendations provided in this AIR may therefore differ greatly from considerations and recommendations found in widely accepted composite design references such as CMH-17 and Advisory Circulars such as AC 20-107(B).
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Carbon Brake Contamination and Oxidation

2016-04-12
CURRENT
AIR5490A
This document provides information on contamination and its effects on brakes having carbon-carbon composite friction materials (carbon). Carbon is hygroscopic and porous, and therefore readily absorbs liquids and contaminants. Some of the contaminants can impact intended performance of the brake. This document is intended to raise awareness of the effects of carbon brake contamination and provide information on industry practices for its prevention. Although not addressed in this report, contaminants can cause problems with other landing system components including tires.
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Aircraft Tire History

2011-04-07
CURRENT
AIR5487B
This SAE Aerospace Information Report (AIR), is intended to provide a continuum on historical development of aircraft tires.
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Carbon Brake Contamination

2002-12-19
HISTORICAL
AIR5490
This document provides information on contamination and its effects on brakes having carbon-carbon composite friction materials (carbon). Carbon is hygroscopic and porous, and therefore readily absorbs liquids and contaminants. Some of the contaminants can impact intended performance of the brake. This document is intended to raise awareness of the effects of carbon brake contamination and provide recommendations for its prevention. Although not addressed in this report, contaminants can cause problems with other landing system components including tires.
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Information on Hard Landings

2018-02-27
WIP
AIR5938A

This document provides information on the current practices used by commercial and military operators in regards to hard landings (or overload events designated as hard landings). Since detailed information on inspections would be aircraft specific, this AIR provides only a general framework. Detailed information and procedures are available in the maintenance manuals for specific aircraft.

Because hard landings potentially affect the entire aircraft, guidelines are listed here for non-landing gear areas. But, the primary focus of the document is the landing gear and related systems. The document may be considered to be applicable to all types of aircraft.

This document does NOT provide recommended practices for hard landing inspections, nor does it provide recommendations on the disposition of damaged equipment. Refer to ARP 4915 and ARP 5600.

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Engine Electrostatic Gas Path Monitoring

1999-03-01
HISTORICAL
AIR4986
Turbine engine malfunctions account for a substantial portion of the maintenance actions required to keep both fixed and rotary wing aircraft operational. Undetected incipient component failures can result in secondary engine damage and expensive unscheduled maintenance actions. Recent developments of electrostatic methods now provide the potential for the detection of foreign object ingestion and early detection of distress in gas path components. This SAE Aerospace Information Report (AIR) seeks to outline the history of the electrostatic technique and provides examples of state-of-the-art systems for both inlet and exhaust gas debris monitoring systems along with examples of most recent testing.
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Unique Wheel and Brake Designs

2001-06-01
CURRENT
AIR5388
This SAE Aerospace Information Report (AIR) has been prepared by a panel of the SAE A-5A Committee and is presented to document unique design approaches used for aircraft wheels and brakes.
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Fuels in Ground Support Equipment (Other Than Gasoline or Diesel)

2010-08-04
CURRENT
AIR5373A
This SAE Aerospace Information Report (AIR) is intended as a source of comparative information and is subject to change to keep pace with experience and technical advances. This document describes currently used fuels and fuels which may be used in the future. Conventional gasoline and diesel fuels are intentionally omitted from this document.
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Fuels in Ground Support Equipment (Other Than Gasoline or Diesel)

1999-01-01
HISTORICAL
AIR5373
This SAE Aerospace Information Report (AIR) is intended as a source of comparative information and is subject to change to keep pace with experience and technical advances. This document describes currently used fuels and fuels which may be used in the future. Conventional gasoline and diesel fuels are intentionally omitted from this document.
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