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This SAE Aerospace Information Report (AIR) reviews the precautions that must be taken and the corrections which must be evaluated and applied if the experimental error in measuring the temperature of a hot gas stream with a thermocouple is to be kept to a practicable minimum. Discussions will focus on Type K thermocouples, as defined in National Institute of Standards and Technology (NIST) Monograph 175 as Type K, nickel-chromium (Kp) alloy versus nickel-aluminium (Kn) alloy (or nickel-silicon alloy) thermocouples. However, the majority of the content is relevant to any thermocouple type used in gas turbine applications.

Document provides information on how military/commercial/gas turbine engine test cell/system users may benefit from this unique Coanda/Refraction concept.

Document provides information on how military/commercial/gas turbine engine test cell/system users may benefit from this unique Coanda/Refraction concept.

Document provides information on how military/commercial/gas turbine engine test cell/system users may benefit from this unique Coanda/Refraction concept.

These recommendations are written to cover the testing of air conditioning equipment as installed in the prototype aircraft for the purpose of: A Demonstrating safety of the installation. B Demonstrating performance of the installation. a Aircraft ducting and distribution system. b Component parts (i.e., vendors equipment) C Obtaining data for future design.

This SAE Aerospace Recommended Practice (ARP) is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances.

This specification covers a corrosion and heat resistant steel in the form of bars, forgings, flash welded rings, and stock for forging or flash welded rings.

This Recommended Practice covers the following categories: a Basic engine rating (requirements for) - (Para. 3) b Suggested minimum conditions for selection - (Para. 4) c Recommended horsepower rating reductions - (Para. 5) d Special considerations - (Para. 6) e Recommended safety devices - (Para. 7) f Recommended minimum instrumentation - (Para. 8) g Recommended selection support data - (Para. 9) h Recommended usage of ARP - (Para. 10)

This SAE Aerospace Recommended Practice (ARP) covers specification requirements for a rotary plow with carrier vehicle. The primary use is to cast heavy concentrations of snow approximately perpendicular to carrier vehicles across and away from airport operational areas, such as runways and taxiways. Rotary plows equipped with spot casting, or loading chutes are also used to cast snow in directions through approximately 100 degrees to the left or right of directly in front of the carrier vehicle, and also to load trucks or trailers used to haul snow away from removal area. The term “carrier vehicle” represents the various self-propelled prime movers that provide the power necessary to move snow and ice control equipment during winter operations.

This SAE Aerospace Recommended Practice (ARP) covers requirements for a rotary plow with carrier vehicle primarily used to cast heavy concentrations of snow away from airport operational areas such as runways and taxiways. The term carrier vehicle represents the various self-propelled prime movers that provide the power necessary to move snow and ice control equipment during winter operations.

This SAE Aerospace Recommended Practice (ARP) describes recommended sampling conditions, instrumentation, and procedures for the measurement of non-volatile particle number and mass concentrations from the exhaust of aircraft gas turbine engines. Procedures are included to estimate sampling system loss performance. This ARP is not intended for in flight testing, nor does it apply to engines operating in the afterburning mode. This ARP is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances.

This Aerospace Information Report (AIR) is a historical technical record describing procedures, required continuous sampling conditions, and instrumentation for the measurement of non-volatile particle number and mass concentrations from the exhaust of aircraft gas turbine engines. Procedures are included to calculate sampling loss performance. This AIR is not intended for in-flight testing, nor does it apply to engine operating in the afterburning mode.

This Aerospace Information Report is a historical technical record of the initial document detailing the measurement of non-volatile particle emissions at the exit plane of aircraft gas turbine engines. This methodology was adopted by ICAO into Annex 16 Vol II and updated into Aerospace Recommended Practice ARP6320.

Future updates of this document may include explanations of the reasoning and assumptions used to develop this measurement methodology.

This SAE Aerospace Recommended Practice (ARP) details the recommended process for correcting measured non-volatile Particulate Matter (nvPM) mass and number data for particle losses in the sampling and measurement system specified in ARP6320. This technique is only recommended for conditions where both nvPM mass and number concentration measurements are in the valid measurement ranges of the instruments which are discussed in the tool limitations section. This ARP also supplies an Excel® software tool with documentation to automate the process. The body of the ARP details the recommended calculation method, uncertainties and limitations of the system loss correction factors. It explains, in detail, the required inputs and outputs from the supplied Excel® software tool (developed on Windows 7, Excel® 2016). Also included are: . The Excel® correction tools (Attachments I and V). . Installation instructions for a Windows based computer (Attachment II).

This Aerospace Information Report (AIR) describes the use of FTIR analyzers for measurements of gaseous emissions from aircraft gas turbine engines and combustion rigs. The use of FTIR analyzers can be demonstrated as a suitable and cost-effective equivalent to NDIR and chemiluminescence analyzers as prescribed in ARP1256 for the measurement of CO, CO2, NO, and NO2, where NOx is closely approximated by the sum of NO and NO2 concentrations. FTIR analyzers may be proven suitable for equivalency of analyzers used in current emission testing. Additionally, FTIR analyzers have potential for equivalent measurements of “total” hydrocarbon (THC) as currently defined in ARP1256.

A general method for the preliminary design of a single, straight-sided, low subsonic ejector is presented. The method is based on the information presented in References 1, 2, 3, and 4, and utilizes analytical and empirical data for the sizing of the ejector mixing duct diameter and flow length. The low subsonic restriction applies because compressibility effects were not included in the development of the basic design equations. The equations are restricted to applications where Mach numbers within the ejector primary or secondary flow paths are equal to or less than 0.3.

This AIR will provide information on measurements of engine-generated bleed air contaminants that are introduced upstream of other aircraft systems. It describes on-wing measurements during transient and steady state conditions of engine operations. It expands on ARP4418 (Procedure for Sampling and Measurement of Aircraft Propulsion Engine and APU Generated Contaminants in Bleed Air) and AIR6418 (Transient Measurement Method Development for Aircraft Propulsion Engine and Auxiliary Power Unit Generated Contaminants in Bleed Air) for on-ground bleed air test in a test stand This document will focus on sampling systems for on-ground initially. In-flight testing will be addressed at a future time. Necessary adaptations for collecting samples and making measurements on-wing compared to a test stand are discussed.