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Definition of Commonly Used Day Types (Atmospheric Ambient Temperature Characteristics Versus Pressure Altitude)
- Aerospace Standard
- AS210
- Reaffirmed
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
“Hot Day”, “Tropical Day”, “Standard Day”, “Polar Day”, and “Cold Day” are part of the lexicon of the aircraft industry. These terms are generally understood to refer to specific, generally accepted characteristics of atmospheric temperature versus pressure altitude. There are also other, less well-known days, defined by their frequency of occurrence, such as “1% Hot Day”, “10% Cold Day”, or “Highest Recorded Day”. These temperature characteristics have their origins in multiple sources, including U.S. military specifications which are no longer in force.
Rationale
Due to the stability of this document and prompted by industry request, this document is to become an Aerospace Standard.
“Hot Day”, “Tropical Day”, “Standard Day”, “Polar Day”, and “Cold Day” are part of the lexicon of the aircraft industry. These terms are generally understood to refer to specific, generally accepted characteristics of atmospheric temperature versus pressure altitude. There are also other, less well-known days, defined by their frequency of occurrence, such as “1% Hot Day”, “10% Cold Day”, or “Highest Recorded Day”. These temperature characteristics have their origins in multiple sources, including U.S. military specifications which are no longer in force.
These day types find their most frequent application in aircraft and propulsion system computer simulations. They do not impose any requirements on system design, but rather form a common frame of reference for defining the conditions under which various types of analyses are to be performed. Day types provide both a convenient mechanism for setting up computer program input and a convenient shorthand for discussing operational environment.
This document is intended to preserve the commonly used day types in an accessible form for future use, make recommendations for their consistent usage, and collect the data in a single format.
AS210 has been reaffirmed to comply with the SAE Five-Year Review policy.
Recommended Content
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| TABLE 1 | ABBREVIATED COLD DAY BASED ON MIL-STD-210A TABLE II | |
| TABLE 2 | ABBREVIATED HOT DAY BASED ON MIL-STD-210A TABLE III | |
| TABLE 3 | ABBREVIATED POLAR DAY BASED ON MIL-STD-210A TABLE IV | |
| TABLE 4 | ABBREVIATED TROPICAL DAY BASED ON MIL-STD-210A, CHANGE NOTICE 1, TABLE V | |
| TABLE 5 | HIGHEST RECORDED DAY BASED ON MIL-HDBK-310 PARAGRAPH 5.3.1.1.1 | |
| TABLE 6 | LOWEST RECORDED DAY BASED ON MIL-HDBK-310 PARAGRAPH 5.3.1.2.1 | |
| TABLE 7 | 1% HOT DAY BASED ON MIL-HDBK-310 PARAGRAPH 5.3.1.1.2 | |
| TABLE 8 | 1% COLD DAY BASED ON MIL-HDBK-310 PARAGRAPH 5.3.1.2.2 | |
| TABLE 9 | 5% HOT DAY BASED ON MIL-HDBK-310 TABLE XIX | |
| TABLE 10 | 10% HOT DAY BASED ON MIL-HDBK-310 TABLE XIX | |
| TABLE 11 | 20% HOT DAY BASED ON MIL-HDBK-310 TABLE XIX | |
| TABLE 12 | 5% COLD DAY BASED ON MIL-HDBK-310 TABLE XX | |
| TABLE 13 | 10% COLD DAY BASED ON MIL-HDBK-310 TABLE XX | |
| TABLE 14 | 20% COLD DAY BASED ON MIL-HDBK-310 TABLE XX | |
| TABLE A1 | COLD DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A2 | HOT DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A3 | POLAR DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A4 | TROPICAL DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A5 | HIGHEST RECORDED DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A6 | LOWEST RECORDED DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A7 | 1% HOT DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A8 | 1% COLD DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A9 | 5% HOT DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A10 | 10% HOT DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A11 | 20% HOT DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A12 | 5% COLD DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A13 | 10% COLD DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A14 | 20% COLD DAY TEMPERATURES VERSUS PRESSURE ALTITUDE | |
| TABLE A15 | STANDARD DAY PRESSURES AND TEMPERATURES VERSUS PRESSURE ALTITUDE |
Issuing Committee
S-15 Gas Turbine Perf Simulation Nomenclature and Interfaces
Welcome to the SAE S-15, Engine Performance Simulation Nomenclature and Interfaces Forum.
Scope: The committee provides recommendations relative to the information contained in mathematical models of aerospace engines and their derivatives and to the coordination of the interfaces between models suppliers and their users. For details about SAE's online privacy policy; copyright, content license, and reliability statements; and membership information, click on the link to "Info on Privacy, Copyright, and Membership" link in the folders area below. No copyrighted material may be posted in this forum. SAE is not liable for opinions expresed or information posted in this forum. All information posted becomes the property of SAEReference
| Number | Title |
|---|---|
| MIL-HDBK-310 | This document is not part of the subscrption. |
| MIL-STD-210 | This document is not part of the subscrption. |
| MIL-STD-210A | This document is not part of the subscrption. |
| MIL-STD-210B | This document is not part of the subscrption. |
| MIL-STD-210C | This document is not part of the subscrption. |
| MIL-STD-3013 | This document is not part of the subscrption. |
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