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Optimization E-25 General Standards for Aerospace and Propulsion Systems Vehicle dynamics Engine components Trucks

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Standard

Screw Threads, Metric Buttress - MJB Profile
2019-01-03
CURRENT
MA1696B
This standard establishes the basic triangular profile for the MJB thread form, the design profiles, standard pitches, tolerance classes, formulae for tolerances and dimensions, tolerance tables, and a system of designations. Because of the specialized application for buttress threads, no preferred diameter-pitch series have been established for this standard and each application will require use of the thread formulae for dimensions and related tolerances given herein for deriving the thread dimensional requirements.
Standard

Propeller Shaft Ends - Dual Rotation (Engine Supplied Bearing)
2018-11-28
CURRENT
AIR18B
This SAE Aerospace Information Report (AIR) records the results of an investigation of a dual rotation propeller shaft standard for an engine supplied bearing and the reason for deciding that such a bearing is impracticable.
Standard

Modules and Basic Racks of Metric Spur and Helical Gears
2018-09-11
CURRENT
AS1560B
This SAE Aerospace Standard (AS) establishes the standard modules for aerospace metric involute gear teeth and establishes the tooth dimensions of aerospace metric involute gear teeth in terms of the conjugate rack type cutter whose counterpart reference profile is called the basic rack profile of the generated gear, having the tooth dimensions expressed in terms proportional to the module.
Standard

Undercuts for Straight Screw Threads - Metric
2018-08-23
HISTORICAL
MA1508
This SAE Aerospace Standard (MA) provides recommended dimensional data for screw thread undercuts for straight “MJ” metric screw threads in accordance with MA1370.
Standard

Screw Threads - MJ Profile, Metric
2018-08-23
HISTORICAL
MA1370
This standard specifies the characteristics of the MJ profile metric series of screw threads, altered from ISO 68 M Profile, to include a mandatory controlled radius of 0.18042P to 0.15011P at the root of the external thread and with the minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius.
Standard

Insert, Screw Thread, Helical Coil Metric Series, Standard Assembly Dimensions For
2018-08-23
HISTORICAL
MA1567B
This SAE Metric Aerospace Standard (MA) provides for helical coil screw thread inserts, both free running and self-locking, installation screw thread dimensional data and guidance on insert length selection. The document also provides formulas for determining requirements when non standard insert lengths are necessary.
Standard

Horsepower Correction Formulae
2018-08-09
CURRENT
ARP2C
This document discusses formulae considered applicable to aircraft engines having integral supercharging without aftercooling, and using gasoline introduced at the entrance to the supercharger or directly into the cylinders. Such engines are normally designated as single and two speed engines. Correction formulae for engines having two stage or exhaust turbo supercharging will not be discussed. Corrections for engines having a high degree of integral supercharging will be discussed in general terms only and no specific formulae will be presented. The correction formulae and methods listed are empirical and subject to error due to conditions beyond the scope of known corrections. Usage has indicated, however, that the correction formulae listed will provide a satisfactory approximation of power output under standard conditions.
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