Archive for the ‘ airfoil simulation ’ Category

New airfoil KS125


KS125

Dat file in QFLR5 format:
KS125.DAT

Here are the polars:

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Simulations: Althaus AH 94-145 vs. AH 95-160

AH-94-145:

AH-95-160:

AH-94-145-vs-95-160:

AH 94-145 simulated ailerons, 70% chord: neutral, -10, +10 deg, mach 0.27 Re 4.5M cruise:

Simulations: Althaus AH 94-145 vs. AH 95-160

AH-94-145:

AH-95-160:

AH-94-145-vs-95-160:

AH 94-145 simulated ailerons, 70% chord: neutral, -10, +10 deg, mach 0.27 Re 4.5M cruise:

NLF vs. turbulent

I ran some simulations for different airfoils in the same condition:
– cruise at medium low altitude, Cl = 0.4, speed = 0.26 mach, Re = 4000000, wing loading >= 20 lbs/sqft.

I first simulated a large number of different airfoils, but finally only picked the couple of NACAs and the NLF215F with -10 degree negative cruise flap and without.

The NLF215F has a clearly better overall performance all over the Cl range what it comes to Cd. Also the pitching moment of this airfoil becomes low when the cruise flap is at -10 degrees.

NLF vs. turbulent

I ran some simulations for different airfoils in the same condition:
– cruise at medium low altitude, Cl = 0.4, speed = 0.26 mach, Re = 4000000, wing loading >= 20 lbs/sqft.

I first simulated a large number of different airfoils, but finally only picked the couple of NACAs and the NLF215F with -10 degree negative cruise flap and without.

The NLF215F has a clearly better overall performance all over the Cl range what it comes to Cd. Also the pitching moment of this airfoil becomes low when the cruise flap is at -10 degrees.