Fall Vault Airborne


Overview: Computes the Fall/Vault Speed (along with ancillary information) for specific input data regarding the horizontal and vertical change in the center of gravity of a vehicle (object).


Entry into Module:


This module of the program is normally entered by clicking on the REC-TEC block in the upper left of the REC-TEC Window causing the drop-down menu to appear. Place the cursor on the Fall Vault block and click on Airborne on the sub-menu to initiate this module.


Under certain circumstances, the user may choose to use the Files block instead of the drop-down menu approach. Selecting any file with an .FLV extension in the Dialog box accessed from either the Open Single File or Open Multiple Files block opens this module.


Selecting AutoLoad [ON] from either the Setup Menu or the AutoLoad Icon on the upper right side (third line) of the REC-TEC Window automatically loads the scenario that was on the screen when the module was closed, either individually, or when the program was closed. With AutoLoad [OFF] on the main REC-TEC Window, modules will start without loading a file.


Data Entry:


This module contains the following data entry blocks within the leftmost frame:


CG to CG All measurements from Take-Off Point


Point of Landing


              Horizontal (X) required


              Vertical (Y) required (Negative Value if below Take-Off Point)


              T/O Angle not required (default is zero)




Intermediate (Third) Point


              Horizontal (X) Measured from T/O Point

              Vertical (Y) Measured from T/O Point (Negative Value if below Take-Off Point)


Entry of required information in the data boxes is sufficient to generate a solution and causes output information to appear in the Output frame. As the input data is changed, the output data is automatically updated without the need to tell the program to update the output.




The output from this module consists of the repeated input variables plus all of the unknowns that were not entered into the left Input frame expressed in the primary and secondary configurations. Output shows computations for Optimum Angle as well as Computations for T/O angle entered directly or computed using Intermediate (Third) Point.


              Optimum Angle: Angle generating lowest possible take-off speed (without wind resistance)

              T/O Angle: - Angle entered directly or computed from Intermediate Point


              Max Vertical: Maximum Vertical height reached during vault

              Dist (MV): Horizontal Distance at Maximum Vertical height

              Time (MV): Time at Maximum Vertical height


              Time (Vault): Time of Vault


              Speed (V): - Speed of Vault (at optimum/take-off angle - Primary)

              Speed (V): - Speed of Vault (at optimum/take-off angle - Secondary)


Horizontal and Vertical Position (Click for Time or Distance entry)


              Time [Data Entry] Horizontal Distance Vertical Distance

              Distance (H) [Data Entry] Horizontal Distance Vertical Distance




Several Command Buttons appear in a frame located at the lower right corner of the module Window. The Command Buttons allow the user to engage options including the option to Open and Save the data required to generate the scenario shown on the screen at the time the file was saved.


              Open .FLV File Calls up a Dialog box, which Opens any pre-existing .FLV file and displays the output results.


              Save .FLV File Calls up a Dialog box, which Saves data on the screen to files with any user-selectable filenames. This is independent of the automatic saving as LastFile.FLV of the data at the close of this module or the close of the program.


              Formulae Opens a word processor (set by the user in Setup) with a file showing the basic formulae use in this module of the program. While the user may add to or modify the information in this file, it does not change the formulae imbedded into the program.


              Formulae* Toggles a frame displaying the formulae for computing the unknowns in this d. In addition to the basic formulae, the frame shows intermediate steps with the actual input data shown in the computation.


              Animation The display shows the Vault curve. Horizontal Distance is shown on top and bottom scale. Vertical Distance is shown on left and right scales. If Intermediate Point is used, it is shown on animation as circle on the arc. Vault is shown to scale, as the scaling for both horizontal and vertical distance is identical. Animation may be stopped and resumed using the mouse or the spacebar. [Esc] to Exit


              N This button toggles a graphical number pad on the screen that can be used to enter data into the input boxes without using your keyboard number pad. This may be useful for presentations as data entry can be accomplished using a wired/wireless mouse.


              Tables / FDA Calls up a frame that permits the user to input the minimum and maximum values for selected input variables along with the interval for Iteration. If Finite Difference Analysis (FDA) is selected, the resulting analysis computes the uncertainty level for the specified range of the input variables.


For a more in-depth description of Finite Difference Analysis, see the Finite Difference Analysis Section of this Manual Press [F2] from any Active module of the program.