Drag Kraft Rechner — Formel
## Aerodynamic Drag Force
Drag is the resistive force opposing an object moving through a fluid. It depends on the shape (captured by CD), the flight condition, and the size of the body.
### Formula
**D = CD × 0.5 × rho × V² × S**
The power needed to sustain flight against this drag is P = D × V. Minimizing drag is a central goal in aerospace and automotive design because it directly reduces fuel burn.
Drag is the resistive force opposing an object moving through a fluid. It depends on the shape (captured by CD), the flight condition, and the size of the body.
### Formula
**D = CD × 0.5 × rho × V² × S**
The power needed to sustain flight against this drag is P = D × V. Minimizing drag is a central goal in aerospace and automotive design because it directly reduces fuel burn.
Lösungsbeispiel
An aircraft wing with CD = 0.03, area 25 m², flying at 80 m/s in sea-level air.
- Dynamic pressure q = 0.5 × 1.225 × 80² = 3920 Pa
- Drag = 0.03 × 3920 × 25 = 2940 N
- Power = 2940 × 80 / 1000 = 235.2 kW