As a designer let’s consider that we want to build an aircraft weighing 28000 units at take-off. How many engine will require if our thrust loading T.L. is 0.71 and thrust per engine is 10000 unit?

Initial Sizing topics include: Rubber engine sizing, fixed engine sizing, geometry and control surface sizing. Initial sizing is the first step in aircraft design. It defines the rough size and weight of an aircraft based on its intended requirements. Initial sizing includes: Weight and volume estimations Constraint analysis for the thrust-to-weight ratio Wing loading Visual analysis of the available design space with respect to performance constraints Selection of the optimum design point (P/W and W/S) and the corresponding HP Engine characteristics and aerodynamic... Show more

Initial Sizing topics include: Rubber engine sizing, fixed engine sizing, geometry and control surface sizing.

Initial sizing is the first step in aircraft design. It defines the rough size and weight of an aircraft based on its intended requirements.

Initial sizing includes:
Weight and volume estimations
Constraint analysis for the thrust-to-weight ratio
Wing loading
Visual analysis of the available design space with respect to performance constraints
Selection of the optimum design point (P/W and W/S) and the corresponding HP
Engine characteristics and aerodynamic characteristics
Sizing of an aircraft's mass, wing area, and propulsion system 

Initial sizing can also include point- and mission performance analysis. 

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