Landing Performance Characteristics Calculation

This GUI program calculates all the required Landing flight performance characteristics for Jet-Engine Aircrafts, the performance characteristics (Outputs) includes:

Total Take Off Distance
Total Take Off Time
Ground Run Distance
Ground Run Time
Flare Distance
Flare Time
Airborne Distance
Airborne Time
Airborne Speed VA
Decent Angle
Chart presents all the past characteristics

Required Inputs are:

To run the program you need to insert the following values:

Obstacle Height (11.5 m as FAR standard, 15 m as UK standard)
Reference Area
Airplane Weight
Engine Thrust
Zero-Lift Drag Coefficient CDo
K: constant of CL^2 in the drag polar equation (CD = CDO + K*CL^2)
Maximum Lift Coefficient
Friction Coefficient [0.02 – 0.05]

The code based on Pamadi[1] and Saarlas[2] equations of performance of jet engine aircraft in cruise flight.

Example you can try with this program:

A jet-engine airplane weighs 40 KN and has a reference area S of 29 m2. The drag polar is given by CD = 0.009 + 0.06CL^2, CLmax = 2.05, and the engine thrust T = 20,900 N, friction Coefficient 0.05. Use obstacle height of 15 m.

Used Terms:

L: Lift
D: Drag
CD0: Zero-Lift Drag Coefficient
K: Weight of CL^2 in Drag Polar (CD = CD0 + K*CL^2)
CL: Lift Coefficient
VA: Approaching Speed (1.3 Vstall)
Vstall: the Flight Velocity calculated with respect to CLmax
Mu: Friction Coefficient between the ground and airplane wheels.

Program Interface:

The Program has one interface where you need to inter 8 requirements of the studied airplane and you will get 8 results, there are a chart you can present it by clicking on the button ‘Show Chart’ this chart explains the parameters you are going to find.

Notes:

If some results are negatives then there are an error in your inputs. The program has been tested on various ranges of airplanes characteristics and the results were accepted and logical.

References:

[1] Bandu N. Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Second Edition, at NASA Langley Research Center, Hampton, Virginia.

[2] Maido Saarlas, Aircraft Performance, Department of Aeronautics Engineering at U.S. Naval Academy.