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Airport Update


Aircraft Update


Edgemont Aviation


Aircraft Update

The Airplane update form allows the user to update data for a selected airplane.


Access is provided to update this data as a convenience to the user. However care should be exercised in changing any of the Takeoff and Landing calculation data. There is little or no editing performed on this data.

That means you can do just about whatever you want to it - good or bad.

Before you do anything bad to this data it is STRONGLY ADVISED that you make a good backup of the Airplanes.dat file in the application folder ( probably named C:\Program Files\Edgemont\wxCheck ).

If this data gets messed up it could prevent the program from running properly.


Area A

Registration/Type/Description - These fields are used to identify the aircraft.

Area B

Fuel fields - These fields are for information only, they are unedited and are not currently used in any calculations.

Area C

Takeoff/Landing Distance Calc Type - The Takeoff and Landing distance for an airplane may be calculated three different ways. Using the Cessna data tables, using the Piper Performance Charts or by using simple Static values entered on this Tab.

Takeoff - The Takeoff distance used for airplanes that use the simple Static value.

Landing - The Landing distance used for airplanes that use the simple Static value.

Area D

Moment Arms - These standard weight and balance moment arms are found in Section 6 of the aircraft Information Manual. These will of course vary depending on actual equipment installed and data found on a Weight & Balance data form in the POH.

These Arms may be modified by clicking on the Add, Change or Delete buttons and entering updated values. They may be moved up or down in the display by Clicking the Move Up or Move Down buttons.

The data entered here is plotted and displayed on the graph to the right that displayed the Weight vs. CG Envelope defined on the CG Envelope Tab.

Area E

Plot Type - Plot the Arm (Cessna/Piper) ot the Moment (Diamond).

Piper Performance Chart


This chart shows either the Takeoff or Landing performance for the Piper airplane. The User may perform ďWhat-If?Ē calculations by sliding the tabs at the bottom of the screen and watch the resulting changes to the graph.

When this chart is first displayed it will contain values from the weather for the data currently displayed on the Current Tab, assuming this chart is for the current Default Airplane.

Area F

Weight & Inches - The data entered here is used to draw the CG Envelope. Itís pretty simple to use. Just click the Add, Change or Delete Buttons or double click the line to update the data.

Area G

Cessna Takeoff & Landing - The data entered here is used to calculate the Takeoff and Landing distances for the Cessna. The values here are taken from the PIM. The calculations will attempt to interpolate between the lines so the results may not exactly match these tables.

Area H

Piper Takeoff & Landing - The data entered here is used to calculate the Takeoff and Landing distances for the Piper. The values here are taken from the charts in Section 5 of the PIM.

The numbers in these tables refer to the X,Y coordinates on these graphs in Section 5.


This data was designed to work for this specific Airplane Make and Model. No guarantee is made or implied about itís applicability for any other airplane.


So why allow update on this screen?

Just in case you may want to hack around with it. Strange things could happen if you change this data so PLEASE!! make a backup of Airplanes.dat before you make changes.


So just to be clear , you probably donít want to mess with this data, I just put it here for those curious people who may have some fun with it. It also makes my work a little easier as I develop the data.


Chart Button - Use the Chart button to display the Piper Performance Chart (see below).