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• ## Find the lift per unit span and the circulation at an angle of attack of $$4^{\circ}$$, for this airfoil.

A NACA 4421 airfoil having a chord length of $$2\,m$$ is flying at an velocity of $$70\,m/s$$ at an altitude …

Asked on 22nd July 2021 in
• 24 views
• ## Find the location of the aerodynamic center.

An airfoil has a lift coefficient and moment coefficient of $$-0.35$$ and $$-0.050$$ about quarter-chord at $$-6^{\circ}$$ angle of attack. …

Asked on 22nd July 2021 in
• 26 views
• ## Find the angle of attack for this airfoil, if the lift per unit span produced is $$1400\,N$$.

A NACA 0012 airfoil having a chord of $$2.3\,m$$ is in an airstream velocity of $$70\,m/s$$ at standard sea level …

Asked on 22nd July 2021 in
• 25 views
• ## Can an airfoil fly upside-down ?

A positively cambered airfoil has a zero-lift angle of $$-3.5^{\circ}$$. The lift slope for this airfoil is $$0.12$$ per degree. …

Asked on 13th July 2021 in
• 51 views
• ## Find the circulation around a spinning circular cylinder in free stream flow of velocity $$40\,m/s$$ at a standard sea level conditions, if the lift produced by the cylinder is $$8\,N/m$$ of span.

Find the circulation around a spinning circular cylinder in free stream flow of velocity $$40\,m/s$$ at a standard sea level …

Asked on 16th June 2021 in
• 75 views
• ## An airplane is flying at an velocity of $$100\,m/s$$. Find the pressure coefficient at a point on the surface of the wing where the flow velocity is $$140\,m/s$$.

An airplane is flying at an velocity of $$100\,m/s$$. Find the pressure coefficient at a point on the surface of …

Asked on 16th June 2021 in
• 73 views

A pitot tube of an airplane which is flying at an standard sea level measures a pressure of $$1.09 \times … Asked on 16th June 2021 in • 71 views • 1 answers • 0 votes • ## Find the velocity of air in the test section of a low speed open circuit subsonic wind tunnel which has an inlet -to-throat area ratio of \(10$$.

Find the velocity of air in the test section of a low speed open circuit subsonic wind tunnel which has …

Asked on 15th June 2021 in
• 91 views
• ## Find the velocity of an airplane flying at a standard sea level, if the static pressure at the throat of venturi is $$100 000 N/m^{2}$$.

A venturi is attached on a side of an airplane fuselage, has an throat to inlet area ratio of $$0.8$$.  …

Asked on 15th June 2021 in
• 82 views
• ## Find the velocity vector and its magnitude at a point $$p\left ( 3,2,4 \right )$$ at $$t=5$$ seconds.
In a flow field, the velocity components are, $$u=\left ( 6x^{2}y+t \right ),v=\left ( 3yx+t^{2}+3 \right )$$ and \( w=\left …