• Question Tag: airfoil
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• ## PollStall in an aircraft occurs when

Stall in an aircraft occurs when there is a flow separation and reduction in the lift coefficient of the airfoil. …

Asked on 6th July 2020 in
• 53 views
• ## What is critical Mach number ?

What is critical Mach number ?

Asked on 25th June 2020 in
• 105 views
• ## Calculate the lift and induced drag coefficients for the wing at a geometric angle of attack = $$7^{\circ}$$.

The measured lift slope for the NACA $$23012$$ airfoil is $$0.1080\; degree^{−1}$$, and $$α_{L}=0 = −1.3^{\circ}$$. Consider a finite wing …

Asked on 12th November 2019 in
• 308 views
• ## Using thin airfoil theory, calculate $$(a) α_{ L=0}$$ (b) $$cl$$ when $$α = 3^{\circ}$$.

The NACA 4412 airfoil has a mean camber line given by\[\frac{z}{c} = \left\{ {\begin{array}{*{20}{c}} {0.25\left[ {0.8\frac{x}{c} – {{\left( {\frac{x}{c}} \right)}^2}} …

Asked on 11th November 2019 in
• 660 views
• ## Calculate the location of the aerodynamic center.

For the NACA $$2412$$ airfoil, the lift coefficient and moment coefficient about the quarter-chord at $$−6 ^{\circ}$$ angle of attack …

Asked on 10th November 2019 in
• 187 views
• ## Calculate the lift coefficient and the moment coefficient about the leading edge.

Consider a thin, symmetric airfoil at $$1.5^{\circ}$$ angle of attack. From the results of thin airfoil theory, calculate the lift …

Asked on 9th November 2019 in
• 195 views
• ## Starting with the definition of circulation, derive Kelvin’s circulation theorem.

Starting with the definition of circulation, derive Kelvin’s circulation theorem.

Asked on 9th November 2019 in
• 190 views
• ## what is the angle of attack?

Consider an NACA $$2412$$ airfoil with a $$2\;m$$ chord in an airstream with a velocity of $$50\; m/s$$ at standard …

Asked on 8th November 2019 in
• 193 views
• ## Calculate the lift and moment about the quarter chord (per unit span) for this airfoil.

Consider the data for the NACA $$2412$$ airfoil. Calculate the lift and moment about the quarter chord (per unit span) …

Asked on 8th November 2019 in
• 301 views