CAD Policy A9

8/8/2019 CAD Policy A9

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CAD-POLICY FOR A-9 BOX WING AIRLINER

TABLE OF CONTENT

Table of Figures ........................................................................................................................................................................ 2

Responsibilities of CAD-Team ............................................................................................................................................ 3

Structure of CAD Team .......................................................................................................................................................... 3

CAD-Integrators ....................................................................................................................................................................... 4

Configuration Control ............................................................................................................................................................ 4

Master Models ........................................................................................................................................................................... 5

Responsibility for Integration ............................................................................................................................................ 6

Axis System ................................................................................................................................................................................ 7

Part Numbering ........................................................................................................................................................................ 8

Dimensions and Scale ............................................................................................................................................................ 9

Modification Log .................................................................................................................................................................... 10

Colour Coding .......................................................................................................................................................................... 11



TABLE OF FIGURES

Figure 1: CAD-Team Structure ................................................................................................................................ 3

Figure 2: Folders of Master Models........................................................................................................................ 4

Figure 3: Location of CAD_Models Folder .............................................................................................................. 5

Figure 4: Example of Master Model ....................................................................................................................... 5

Figure 5: Responsibility of Integrators and Designers ............................................................................................ 6

Figure 6: Axis System ............................................................................................................................................. 7

Figure 7: Modification Log inside CAD Files .......................................................................................................... 10

Figure 8: Example in Modification Log ................................................................................................................. 11

Figure 9: Structure of Modification Log ................................................................................................................ 11

Figure 10: Colour Coding ...................................................................................................................................... 12



RESPONSIBILITIES OF CAD-TEAM

The CAD team is responsible for setting up the initial surface model and implement changes to it if

necessary.

Furthermore the CAD team will ensure that the read-only shared folder (AVDCADTeam) is updated

with the latest files once a week.

The CAD team will assist the group in integrating the different components of the aircraft.

Finally the CAD team sets up guidelines for modelling, integration and CAD-configuration.

STRUCTURE OF CAD TEAM

For establishing the first Surface Model the CAD Team is organised as such:



CAD-INTEGRATORS

The integration tasks have been assigned as following:

- Fwd Composite Wings Amarnath Chirithoti

- Fwd Metallic Wings Ross Napier

- Aft Composite Wings Nick Markovic

- Aft Metallic Wings Praveen Rajendran Chennai

- Composite Fuselage Structure Paarthaa Iyengar

- Metallic Fuselage Structure André Pehlivan

- Aircraft Systems Ravinka Seresinhe

- Avionics/ Interior Torben Allert

The tasks of an integrator are described within the next chapter.

CONFIGURATION CONTROL

For the design of the A9 Box Wing Airliner the CAD-Files are stored in two main folder. The

“AVDCADTeam” folder is the read-only area, the “AVD Group Design Project/CADTeam” is the

read/write area.

There will three folders under the AVDCADTeam folder for the master models; one for the aircraft



Only the CAD Team Members and the nominated staff have write-access to that folder. All otherAVD-participants have read-access.

The content of the Master-folders will be updated on a weekly basis. For the update of the CAD

models all AVD students shall work in their individual folders and copy their CAD-files into the AVD

Group Project folder (CAD_Models) and notify the CAD team about their updates.

Figure 3: Location of CAD_Models Folder

Within the “CAD_Models” Folder every team member will be provided with an individual folder.

MASTER MODELS The Master Model is a CADProduct-file with the main assemblies of the aircraft. In these main

assemblies (here e.g. “Fwd_Wing(C)”) the related top assemblies of the designers will be copied.



RESPONSIBILITY FOR INTEGRATION

The CAD Team Integrators are responsible for the integration of their relevant components into the

master model on a top level basis, e.g. the CAD Integrator for the Fwd Wing will take care of all Fwd

wing related assemblies, the fuselage CAD integrator for all fuselage related assemblies etc.

Each designer is responsible to deliver to the CAD integrator an assembly in the correct axis system.

The CAD integrator will not do any work below the assembly level.



assembly. Should the new assembly be not correctly positioned or creating clashes the integrator

will refuse to implement this new assembly and ask the designer to correct it.

All designers do their design work in their local drives and save only the CAD-files which they want

in the master model into the AVD shared drive (“CAD_Models”). The master models will be updated

using these files regularly. Typically this update will be carried out once a week and the CAD-Team

will inform the CAD Team Supervisor and the project monitor about the Update of the master

model.

Note: Designer should keep their own copy of their files in their personal drives as backup in case a

data loss occurred in the shared drive

AXIS SYSTEM

The axis system used for modeling the A-9 aircraft in CATIA is given as below:



PART NUMBERING

In order to prevent inconsistencies and data loss in the global assembly, the CATIA files names

should never be changed.

Every designer is responsible for creating their individual parts and at least one assembly. The

following naming conventions shall be used:

For a CADPart

“A9-XXXXX-XXX-XXXXXX.CATPart”

Individual Part number – unlimited digits,

free to chose numbering/naming

Iteration starting with 001

Individual assigned GDP Task (exact wording according to List)

Example: Rib for Outer Fwd Wing in Composite

A9-Fwd_Wing_Outer(C)-001-Rib01.CATPart

For Sub Assemblies



For the Top Assembly

The naming convention for the top assembly shall be as follows:

“A9-XXXXX-XXX.CATProduct”

Iteration starting with 001

Individual assigned GDP Task (exact wording according to List)

Example: Top Assembly for Outer Fwd Wing in Composite

A9-Fwd_Wing_Outer(C)-001.CATProduct “

DIMENSIONS AND SCALE

The 3D-Model shall be designed in full scale. Dimensions shall be in millimeters.



MODIFICATION LOG

Record modifications made to the component in the Description box for the component which can

be found in CATIA's file properties. In the description field of all CADParts and CADProducts write a

short description and the date of the modification.

Figure 7: Modification Log inside CAD Files

CAD M d l M difi i L



Figure 8: Example in Modification Log

For each CATIA file created the following shall be specified:

Assembly-, Subassembly- and Part-names

Folder, where files are stored

Date of last modification,

Brief description of the modification,

Status (e.g. “new version waiting for update in the CAD model”, “updated”…).

There are 8 different sheets in this Excel-Spreadsheet, each for one CAD-Integrator. Designer must

take care to put their data in the correct sheet. Which components belong to each CAD-Integrator is

shown in an additional sheet (Allocation).



Colour Coding

Part Area Colour R G B Preview

Structures - metallic Grey 190 190 190

Structures - composite Beige 250 230 165

Electric systems Blue 15 90 230

Hydraulic systems Green 0 160 0

Environmental control system Yellow 250 250 0

Power plant & APU Purple 240 20 240

Fuel system Brown 189 142 64

Flight deck & cabin layout Light blue 80 200 240

Avionic systems Orange 255 128 0

Figure 10: Colour Coding

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CAD Policy A9

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