Components of
-EM
-OEM
-MZFM
-MTOM
-MLM
Main Mass Groups DIN9020
Design process from Top-Level Reqs to Aircraft Concept
Which design phases are used in which design phase
Stage 1 of design process
Stage 2 of design process
Stage 3 of design process
Stage 4 of design process
Stage 5 of design process
Stage 6 of design process
Design stages 1-6
1: Determination of masses using statistical data (unit/%-Masses) (30% inaccuracy)
2: Calculation of masses with approximate formulas (correlation and regression) (10-20%)
3: Computer-aided (FEM)calculations based on construction data, dimensions, loads, materials (5%)
4: Masses calculated based on preliminary data
5: Masses calculated based on manufacturing drawings
6: Weighing of the aircraft and its parts
Causes for increase of empty mass
Mass growth factor and snowball effect
Typical range and examples of the MGF
Consequences of significant change in take-off mass
Possibilities for mass reduction during construction
Possibilities for mass reduction during flight operation
Weight and balance diagramm
The balance diagram
Timber framework with fabric covering
Aluminium framework with planking
Advantages and disadvantages of Timber framework
Wing-Concept and advantes/disadvantages for small aircraft
Wing-Concept and advantes/disadvantages for comercial aircraft
Fuselage structure frames and stringers + (dis)advantages
Fuselage structure semi-monocoque
Use of composite materials in aircraft design
Usage of CFRP in Aircraft-Design
(Dis)advantages of CFRP in aircraft design
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