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AH21 9% version

Cambered · 7% thick · low-to-mid Re
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PROFILEAH21 9% version
surfacecamber line
GEOMETRY · AREA METRICS
max thickness7.0% @ 35%c
max camber1.8% @ 55%c
LE radius0.54%c
area upper / chord0.0379
area lower / chord-0.0122
area camber / chord0.0129
TE thickness0.00%c
DOWNLOAD COORDINATES

Polars

Preliminary
Combined estimate
-0.475-50.34493.3331.16511.671.98520ClAngle of attack (°)
Why this curve

This curve combines the stored NeuralFoil prediction with 0 contributing CFD observations. History windows remain observations, not separate solver runs or automatically converged points.

Model uncertainty is conditional on the stated assumptions and has not been calibrated for this condition. It is not a validated accuracy guarantee.

Geometry fit: RMS error 0.01044% of chord; maximum error 0.06535%.

NeuralFoil 0.3.3 · AeroSandbox 4.2.10 · Polar model progressive-polar-gp-v2

Curve summary

Combined estimate · Within -5° to 20°

Maximum lift / drag
131.6
Angle at maximum lift / drag (°)
8
Minimum Cd
0.006401
Maximum Cl
1.78
Angle at maximum Cl (°)
16
Cd at zero lift
0.006409
Cm at zero angle
-0.07221
CFD points
SOLVER WORK0 conditions · 0 engine jobs
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