1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2003 SAE InternationalAll rights reserved. No part of this publication may be
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4、-776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgAEROSPACE RECOMMENDED PRACTICEARP4101/2Issued 1989-02Reaffirmed 2003-02Pilot Visibility From The Flight Deck1. SCOPE:This document recommends criteria to assure adequate visibility from the flight deck. The flight deck windshield must p
5、rovide sufficient external vision to permit the pilot to perform any maneuvers within the operating limits of the aircraft safely and at the same time afford an unobstructed view of the flight instruments and other critical components and displays from the same eye position.2. REFERENCES:2.1 Documen
6、tation:- SAE S-7 ARP4101, Flight Deck Layout and Facilities- SAE S-7 ARP4102, Flight Deck Panels, Controls and Displays- SAE S-7 ARP4105, Nomenclature and Abbreviations for Use on the Flight Deck- SAE S-7 ARP4102/8, Flight Deck, Head-Up Displays2.2 Definitions:2.2.1 Design Eye Position: The design e
7、ye position shall be in accordance with ARP4102. Means within the aircraft shall be provided to facilitate and guide the pilot to the design eye position. For the right seat pilot, all dimensions are opposite.Visual field and angle measurements shall utilize ambinocular vision (total vision of both
8、eyes). (See Fig. 1.)- The two eye points are placed 31.8 mm (1-1/4 in) on each side of the design eye position.SAE ARP4101/2 - 2 -2.2.1 (Continued):- The eye positions are rotated in the horizontal plane from a central (vertical) axis located 84 mm (3-5/16 in) aft of the design eye position. (See Fi
9、g. 1.)- The horizontal and vertical vision angles shall be measured from (1) a vertical plane running fore and aft through the design eye point and central axis and (2) a horizontal plane that passes through the design eye point and central axis. The horizontal and vertical reference plane shall be
10、parallel to those corresponding to zero pitch and yaw angles.3. OPERATIONAL REQUIREMENTS:3.1 Clear Areas of Vision:With the design eye position located per paragraph 2.2.1 the vision through the transparent areas shall provide the following minimum viewing angles: (See Fig. 2.)3.1.1 Forward and up 3
11、5 degrees from the horizon at 40 degrees left diminishing linearly to 15 degrees up at 20 degrees right.3.1.2 Forward and down 17 degrees from the horizon between 30 degrees left and 10 degrees right diminishing linearly to 10 degrees down at 20 degrees right.3.1.3 Forward and up 35 degrees from the
12、 horizon between 40 degrees left and 80 degrees left diminishing linearly up to 15 degrees up at 120 degrees left.3.1.4 Increasing linearly from forward and down 17 degrees from the horizon at 30 degrees left to forward and down 27 degrees from the horizon at 70 degrees left.3.1.5 Forward and down 2
13、7 degrees from the horizon between 70 degrees left and 95 degrees left diminishing linearly to 15 degrees down at 120 degrees left.3.2 Landing Vision:In addition to the requirements of paragraph 3.1, the view angle forward and down shall be sufficient to allow the pilot to see a length of approach a
14、nd/or touch down zone lights which would be covered in three seconds at landing approach speed when the aircraft is:(a) on a 2-1/2 degree glide slope(b) at a decision height which places the lowest part of the aircraft at 30.5 m (100 ft) above the touch-down zone extended horizontally(c) yawing to t
15、he left to compensate for ten knots crosswind(d) loaded to the most critical weight and center of gravity(e) making the approach with 366 m (1200 ft) RVRSAE ARP4101/2 - 3 -3.3 Impairments:Impairments to vision within the vision area described in paragraph 3.1, when using ambinocular vision shall mee
16、t the following requirements:No obstructions to vision between 20 degrees right and 20 degrees left.It must be possible for the pilot to eliminate any obstruction to vision using ambinocular vision with head movement of 32 mm (1.25 in) left and right.3.4 Optical Properties:The windshield shall exhib
17、it equivalent optical properties, without electrically conductive heating films, to MIL-P-25374A for plastic windows and MIL-P-25871A for glass or glass-plastic windows.3.5 Precipitation:Precipitation clearing shall be provided for the windshield panels directly forward of each pilot, and shall be e
18、ffective regardless of thrust setting at all speeds up to at least 1.6 Vs (clean) or 230 knots, whichever is less. The minimum area to be cleared shall be 15 degrees left to 15 degrees right of the design eye position, upwards to the horizon during the steepest approach path expected in operation and downwards to minimum established vision limits required by paragraphs 3.1 and 3.2.PREPARED BY SAE COMMITTEE S-7,FLIGHT DECK AND HANDLING QUALITIES STANDARDSFOR TRANSPORT AIRCRAFTSAE ARP4101/2 - 4 -FIGURE 1 - Measurement of AnglesSAE ARP4101/2 - 5 -FIGURE 2 - Pilot Compartment View
