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Latest
Votes
Unanswered
techAir
How urban air mobility work?
Airplane design
flight mechanics
on 13th December 2021 in
Aeronautics.
727
1
0
Kumar59
What are form drag and profile drag?
drag
drag coefficient
drag force
lift and drag
on 8th September 2021 in
Aeronautics.
613
1
0
Worldtech
A finite wing with an elliptical lift distribution has an aspect ratio of \(6\). The airfoil of the wing has a lift slope of \(0.15\) per degree. Find and compare the lift slopes for a straight wing and a swept wing with a half-chord line sweep of \(30^{\circ}\).
airfoil
lift coefficient
swept wing
on 12th August 2021 in
Aeronautics.
531
1
0
techAir
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 \(0.6\).
Aircraft performance
airfoil
Induced drag
on 12th August 2021 in
Aeronautics.
494
1
0
Kumar59
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 \(6^{\circ}\).
airfoil
Induced drag
lift coefficient
on 11th August 2021 in
Aeronautics.
493
1
0
Worldtech
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 \(1400\,N\).
airfoil
airspeed
lift
lift coefficient
lift force
on 22nd July 2021 in
Aeronautics.
644
1
0
Kisan Kumar
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.
airspeed
incompressible flow
on 15th June 2021 in
Aeronautics.
590
1
0
Kumar59
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.
drag coefficient
lift and drag
lift coefficient
Supersonic airplanes
Supersonic flow
on 26th March 2021 in
Aeronautics.
560
1
0
techAir
Find the gliding distance of an aircraft flying at an altitude of \(1500\,m\) with a maximum lift to drag ratio of \(8\).
Airplane design
drag force
lift and drag
lift force
on 3rd February 2021 in
Aeronautics.
659
1
0
Worldtech
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 \(9\).
drag
drag coefficient
drag force
Induced drag
on 3rd February 2021 in
Aeronautics.
590
1
0
1
2
3
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