Vinay Mishra
Indian Institute for Aeronautical Engineering and Information Technology (IIAEIT), Pune
Vinay Mishra has created this Calculator and 200+ more calculators!
Maiarutselvan V
PSG College of Technology (PSGCT), Coimbatore
Maiarutselvan V has verified this Calculator and 200+ more calculators!

11 Other formulas that you can solve using the same Inputs

Minimum Thrust required for given weight
Thrust of an aircraft=(Dynamic Pressure*Reference Area*Zero-lift drag coefficient)+((Weight^2)/(Dynamic Pressure*Reference Area*pi*Oswald efficiency factor*Aspect Ratio of a wing)) GO
Lift coefficient for given minimum required thrust
lift coefficient=sqrt(pi*Oswald efficiency factor*Aspect Ratio of a wing*((Thrust of an aircraft/(Dynamic Pressure*Reference Area))-Zero-lift drag coefficient)) GO
Zero-lift drag coefficient for given required thrust
Zero-lift drag coefficient=(Thrust of an aircraft/(Dynamic Pressure*Reference Area))-Coefficient of drag due to lift GO
Power required for given aerodynamic coefficients
Power=Weight*Freestream Velocity*Drag Coefficient/lift coefficient GO
Coefficient of Drag for given thrust and weight
Drag Coefficient=Thrust of an aircraft*lift coefficient/Weight GO
Coefficient of Lift for given thrust and weight
lift coefficient=Weight*Drag Coefficient/Thrust of an aircraft GO
Thrust for given coefficients of lift and drag
Thrust of an aircraft=Drag Coefficient*Weight/lift coefficient GO
Lift for an unaccelerated flight
Lift force=Weight-(Thrust of an aircraft*sin(Thrust angle)) GO
Thrust angle for an unaccelerated flight for given lift
Thrust angle=asin((Weight-Lift force)/Thrust of an aircraft) GO
Thrust required for given Lift-to-drag ratio
Thrust of an aircraft=Weight/Lift-to-drag ratio GO
Lift-to-drag ratio for given required thrust
Lift-to-drag ratio=Weight/Thrust of an aircraft GO

1 Other formulas that calculate the same Output

Touchdown velocity for given stall velocity
Touchdown Velocity=1.3*Stall Velocity GO

Touchdown velocity Formula

Touchdown Velocity=1.3*(sqrt(2*Weight/(Freestream density*Reference Area*Maximum Lift Coefficient)))
V<sub>T</sub>=1.3*(sqrt(2*W/(ρ<sub>∞</sub>*S*C<sub>L,max</sub>)))
More formulas
Landing ground roll distance using thrust reversal GO
Touchdown velocity for given stall velocity GO
Stall velocity for given touchdown velocity GO
Landing ground roll distance GO

What speed does a Boeing 747 land at?

A 747 'Jumbo Jet' would typically land at a speed of about 145kts-150kts (166mph-172mph), depending on the landing flap setting selected.

How to Calculate Touchdown velocity?

Touchdown velocity calculator uses Touchdown Velocity=1.3*(sqrt(2*Weight/(Freestream density*Reference Area*Maximum Lift Coefficient))) to calculate the Touchdown Velocity, The Touchdown velocity is a function of instantaneous weight, freestream pressure, and maximum lift coefficient of the aircraft. Touchdown Velocity and is denoted by VT symbol.

How to calculate Touchdown velocity using this online calculator? To use this online calculator for Touchdown velocity, enter Weight (W), Freestream density ), Reference Area (S) and Maximum Lift Coefficient (CL,max) and hit the calculate button. Here is how the Touchdown velocity calculation can be explained with given input values -> 5.783135 = 1.3*(sqrt(2*100/(1.225*5*1.65))).

FAQ

What is Touchdown velocity?
The Touchdown velocity is a function of instantaneous weight, freestream pressure, and maximum lift coefficient of the aircraft and is represented as VT=1.3*(sqrt(2*W/(ρ*S*CL,max))) or Touchdown Velocity=1.3*(sqrt(2*Weight/(Freestream density*Reference Area*Maximum Lift Coefficient))). Weight is a vector quantity and defined as the product of mass and acceleration acting on that mass, Freestream density is the mass per unit volume of air far upstream of an aerodynamic body at a given altitude, The Reference Area is arbitrarily an area that is characteristic of the object being considered. For an aircraft wing, the wing's planform area is called the reference wing area or simply wing area and Maximum Lift Coefficient is defined as the lift coefficient of the airfoil at stalling angle of attack.
How to calculate Touchdown velocity?
The Touchdown velocity is a function of instantaneous weight, freestream pressure, and maximum lift coefficient of the aircraft is calculated using Touchdown Velocity=1.3*(sqrt(2*Weight/(Freestream density*Reference Area*Maximum Lift Coefficient))). To calculate Touchdown velocity, you need Weight (W), Freestream density ), Reference Area (S) and Maximum Lift Coefficient (CL,max). With our tool, you need to enter the respective value for Weight, Freestream density, Reference Area and Maximum Lift Coefficient and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Touchdown Velocity?
In this formula, Touchdown Velocity uses Weight, Freestream density, Reference Area and Maximum Lift Coefficient. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Touchdown Velocity=1.3*Stall Velocity
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