This is the second version of ‘Flight Cruise Performance Calculator for Jet Aircraft’ and also is about a GUI program that calculates Range and Endurance (Flight-Time):
- Range for Fixed Altitude
- Range for Fixed Velocity
- Flight-Velocity that force Fixed-Altitude-Range
- Flight-Velocity that force Fixed-Velocity-Range
- Endurance (Flight Time)
in addition to the other cruise flight performance in the past version, includes:
- Maximum Level Flight Speed
- Minimum Level Flight Speed
- Stall Speed
- Speed Corresponding to Minimum Drag
- Maximum Lift to Drag Ratio
- Absolute Ceiling (Maximum Flight Hight corresponding to Minimum Drag)
- Chart presents: Induced Drag, Zero-Lift Drag, Total Drag and position of Vmin, Vmax and VDmin.
To run the program you need to insert the following values:
- Flight Altitude
- Reference Area
- Airplane Weight
- Fuel Weight
- Fuel Consumption
- Engine Thrust
- Zero-Lift Drag Coefficient CDo
- K constant of CL^2 in the drag polar equation
- Maximum Lift Coefficient.
The program gives you the maximum hight, Velocity, Range and Endurance of a given airplane characteristics and the minimum required thrust for this altitude. The code based on Pamadi and Saarlas equations of performance of jet engine aircraft in cruise flight.
Examples you can try with this program:
A jet-engine airplane weighs 45000 N, hold fuels 10000 N, and has a reference area S of 31 m2. The drag polar is given by CD = 0.014 + 0.038CL^2, CLmax = 1.5, and the engine thrust T = 20,000 N, and Engine Specific Fuel Consumption 30 N/N/H. Determine the maximum and minimum speeds in level flight at sea level and at an altitude of 9000 m. What is the absolute ceiling of this airplane?
- L: Lift
- D: Drag
- Em: Maximum E(L/D)
- CD0: Zero-Lift Drag Coefficient
- K: Weight of CL^2 in Drag Polar (CD = CD0 + K*CL^2)
- c: Specific Fuel Consumption
 Bandu N. Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Second Edition, at NASA Langley Research Center, Hampton, Virginia.
 Maido Saarlas, Aircraft Performance, Department of Aeronautics Engineering at U.S. Naval Academy.