Flow Visualization
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High Pressure
Low Pressure
PEAK L/D RATIO
0.00
@ 0.0 m/s
Efficiency Ceiling
Ratio of Lift (Up) to Drag (Resistance). Higher is better. A value >15 is excellent for hydrofoils.
LIFTOFF SPEED
N/A
Lift > 785 N
Takeoff Threshold
The speed where lift exceeds rider weight. Lower values mean easier, earlier foiling in light wind.
OPTIMAL RANGE
0.0 - 0.0
m/s
90% of Peak Efficiency
Sweet Spot
The speed window where your foil performs near its best. A wider range is more forgiving.
LIFT SLOPE (dCL/dα)
0.0000 /deg
Linear Region
Responsiveness
How much lift changes per degree of pitch. Higher values mean the foil feels more powerful and "twitchy".
PITCH STIFFNESS
0.0000 /deg
Unstable
Longitudinal Stability
Must be negative. More negative means the foil fights harder against pitch changes (stiffer ride).
STATIC MARGIN
N/A
Positive Stability
Stability Safety Factor
Distance between Center of Pressure and Gravity. 15-25% gives a balanced, safe ride.
Phase 1: Performance Analysis
Forces vs Speed Lift should rise quadraticly. Drag should stay low until high speed.
Efficiency (L/D) vs Speed Look for a broad, high plateau. Sharp peaks mean narrow sweet spots.
Speed Sweep Data
| Speed (m/s) | Lift (N) | Drag (N) | L/D Ratio |
|---|---|---|---|
| 8.0 | 0.0 | 0.0 | 0.00 |
Phase 2: Stability Analysis (@ 8.0 m/s)
Lift Coefficient (CL) vs Alpha Linear rise is good. sudden drop off indicates stall.
Drag Coefficient (CD) vs Alpha Parabolic "bucket" shape. Bottom of bucket is minimum drag.
Pitch Moment (Cm) vs Alpha Must slope downwards (negative) for stable flight.
L/D Ratio vs Alpha Shows efficiency at different angles of attack.
Stability Sweep Data
| Alpha (°) | CL | CD | Cm | Pitch Moment (Nm) |
|---|---|---|---|---|
| 0.0 | 0.000 | 0.0000 | 0.0000 | 0.00 |
| 2.0 | 0.000 | 0.0000 | 0.0000 | 0.00 |
| 4.0 | 0.000 | 0.0000 | 0.0000 | 0.00 |