Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for determining drift-down flight path of large airplane

A determination method and aircraft technology, applied to aircraft parts, ground installations, transportation and packaging, etc., can solve the problems of large aircraft without definite performance evaluation means and flight test verification methods, etc., to save flight test sorties, simple calculation method, and easy to remember and the effect of using

Inactive Publication Date: 2013-07-10
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for determining the flight path of a large aircraft to solve the problem that there are no definite performance evaluation means and flight test verification methods for large aircraft in the process of drifting down

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining drift-down flight path of large airplane
  • Method for determining drift-down flight path of large airplane
  • Method for determining drift-down flight path of large airplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] An airplane with a wing area of ​​300m 2 , the flight weight is 150,000kg, and the flight atmosphere density is 0.332kg / m 3 , equipped with 4 engines of a certain type, available thrust P 可用 The calculation is shown in Table 1, and the thrust P is required 需用 See Table 2 for the calculation and Table 3 for the remaining thrust. It can be seen from Table 3 that when the speed is 480km / h, the remaining thrust ΔP is the largest, which is -450kgf, and this speed is the favorable drifting speed.

[0038] Table 1 Available Thrust P 可用 calculate

[0039]

[0040] Table 2 Required thrust P 需用 calculate

[0041]

[0042] Table 3 Calculation of residual thrust ΔP

[0043]

[0044]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of design of large aviation aircrafts, relates to test flight of a large airplane and in particular relates to a method for determining a drift-down flight path of a large airplane. The method comprises the following steps: determining the drift-down performance, and performing test flight verification by utilizing the drift-down performance so as to obtain the drift-down flight path. According to the method, due to the mode of determining the favorable drift-down speed to obtain favorable drift-down performance and performing test flight verification, the drift-down flight path of the airplane is obtained. The favorable calculation method for the favorable drift-down speed V is simple, the speed is conveniently acquired, the result is characterized to be a correction speed, the speed is only related to the flight weight of the airplane and is conveniently remembered and used, and the user's manual of the airplane is easily written; and meanwhile, the method has important guiding significance on the test flight verification, the test flight number can be reduced, the test flight period is shortened, and lots of test flight expenditure is saved. The method is comprehensive in consideration and high in universality and is suitable for twin-engine or over-twin-engine turbofan type flying boxcars and air buses.

Description

technical field [0001] The invention belongs to the field of aviation large aircraft design, relates to the flight test of large aircraft, and in particular relates to a method for determining the flight track of large aircraft. Background technique [0002] According to the requirements of the International Civil Aviation Organization and CCAR-121 (Operation Qualification Rules) of the Civil Aviation Administration of China, in order to ensure the flight safety of aircraft routes, flights on high-altitude routes must undergo safety inspections for drifting. It is beneficial to improve the obstacle-crossing altitude of the aircraft, ensure flight safety, and is beneficial to increase the flight limit weight of the aircraft's route, and increase the economic benefits of the airline. Abroad, there is no clear method for the test flight of large aircraft's drifting performance, and due to technical blockade, relevant technical information cannot be obtained from open channels. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/00
Inventor 耿汝光唐长红任江涛商立英
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA