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An airplane is cruising at \(50\,m/s\) at standard sea level in straight and level flight. The airplane has a wing area of \(15\,m^2\) and a wing span of \(10\,m\), and has the maximum gross weight of \(1000\,kg\). The airfoil of the wing has lift slope of \(0.102\) per degree and angle of attack at zero lift of \(-2.5^{\circ}\). Considering, \(\tau = 0.1\), find the angle of attack for the wing. Also, find the induced drag for the airplane, if span efficiency factor is \(0.6\).
An airplane is cruising at \(50\,m/s\) at standard sea level in straight and level flight. The airplane has a wing …
Aircraft performance

airfoil

Induced drag

techAir Asked on 12th August 2021 in Aeronautics.
- 948 views
- 1 answers
- 0 votes
A finite wing has aspect ratio of \(6\) and taper ratio of \(0.8\). The airfoil constituting this wing has a lift slope of \(0.102\) per degree, and angle of attack at zero lift of \(-1.2^{\circ}\). Assuming that \(\delta =\tau\) and equals approximately \(0.03\) , find the coefficient of lift and induced drag coefficients for this wing at an angle of attack of \(6^{\circ}\).
A finite wing has aspect ratio of \(6\) and taper ratio of \(0.8\). The airfoil constituting this wing has a …
airfoil

Induced drag

lift coefficient

Kumar59 Asked on 11th August 2021 in Aeronautics.
- 918 views
- 1 answers
- 0 votes
A NACA 0012 airfoil having a chord of \(2.3\,m\) is in an airstream velocity of \(70\,m/s\) at standard sea level conditions. 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 …
airfoil

airspeed

lift

lift coefficient

lift force

Worldtech Asked on 22nd July 2021 in Aeronautics.
- 1K 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 \(10\). The U-tube mercury manometer read as a height difference of \(10.5\,cm\) for the pressure difference between the inlet and the test section of the wind tunnel.
Find the velocity of air in the test section of a low speed open circuit subsonic wind tunnel which has …
airspeed

incompressible flow

Kisan Kumar Asked on 15th June 2021 in Aeronautics.
- 1K views
- 1 answers
- 0 votes
Find the lift and wave drag coefficients for an infinitely thin flat plate at an angle of attack of \(8^{\circ}\) in a Mach \(3\) flow.
Find the lift and wave drag coefficients for an infinitely thin flat plate at an angle of attack of \(8^{\circ}\) …
drag coefficient

lift and drag

lift coefficient

Supersonic airplanes

Supersonic flow

Kumar59 Asked on 26th March 2021 in Aeronautics.
- 1K views
- 1 answers
- 0 votes
Find the gliding distance of an aircraft flying at an altitude of \(1500\,m\) with a maximum lift to drag ratio of \(8\).
Find the gliding distance of an aircraft flying at an altitude of \(1500\,m\) with a maximum lift to drag ratio …
Airplane design

drag force

lift and drag

lift force

techAir Asked on 3rd February 2021 in Aeronautics.
- 1K views
- 1 answers
- 0 votes
Find the total drag of an airplane flying at a velocity of \(90\,m/s\) with \(L/D\) ratio maximum. Airplane is weighing \(23000\,N\) and has a wing area of \(20\,m^2\) and an aspect ratio of \(9\).
Find the total drag of an airplane flying at a velocity of \(90\,m/s\) with \(L/D\) ratio maximum. Airplane is weighing …
drag

drag coefficient

drag force

Induced drag

Worldtech Asked on 3rd February 2021 in Aeronautics.
- 1K views
- 1 answers
- 0 votes
Calculate the pressure coefficient at a point on the airfoil where the pressure is \( 8.9 \times 10^4\,N/m^2\). Airfoil is in freestream velocity of \(40\,m/s \) and is at standard sea – level conditions.
Calculate the pressure coefficient at a point on the airfoil where the pressure is \( 8.9 \times 10^4\,N/m^2\). Airfoil is …
Aircraft performance

airfoil

Airplane design

Kisan Kumar Asked on 12th January 2021 in Aeronautics.
- 1K views
- 1 answers
- 0 votes
What are angle of attack, absolute angle of attack and induced angle of attack?
What are angle of attack, absolute angle of attack and induced angle of attack?
Aircraft performance

Airplane design

airspeed

lift

lift coefficient

Kisan Kumar Asked on 4th January 2021 in Aeronautics.
- 2K views
- 1 answers
- 0 votes
What is center of pressure and aerodynamic center?
What is center of pressure and aerodynamic center?
aerodynamic center

Aircraft performance

Airplane design

Kumar59 Asked on 4th January 2021 in Aeronautics.
- 1K views
- 1 answers
- 0 votes

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