Entering Data for Launching Calculations
- Last UpdatedDec 19, 2025
- 2 minute read
The Launching dialog allows you to enter all the required data to perform launching calculations.
Note:
That the Dynamic Data section of the dialog only requires data if the Dynamic launching check box is selected.
The Basic Launching Parameters
|
Parameter |
Units |
Figure Notation see below |
|
Length of fixed ways |
meters/feet |
LFW |
|
Camber |
meters/feet |
C |
|
Tangent of the chord of the ways |
none |
|
|
Tangent of the keel |
none |
|
|
Height of water at way ends |
meters/feet |
WH |
|
Keel height above chord at AP |
meters/feet |
KH |
|
Distance of AP from way ends |
meters/feet |
D2 |
|
Launch weight |
tonnes/tons |
|
|
LCG from AP |
meters/feet |
|
|
Travel interval |
meters/feet |
|
|
Length of sliding ways |
meters/feet |
LSW |
|
Width of sliding ways |
meters/feet |
|
|
Fore poppet pivot point from AP |
meters/feet |
D1 |
|
For dynamic launching, these further parameters must be entered |
||
|
Parameter |
Units |
Limits |
|
Available travel before rest |
meters/feet |
Length of fixed ways to 15000 |
|
Water resistance coefficient |
none |
0.000 to 0.015 |
|
Grease friction coefficient |
none |
0.000 to 0.06 |
|
Drag coefficient |
none |
0.300 to 1.000 |
Note:
The Drag coefficient is the coefficient of friction of the drag chains.
For the drag chains, the travel at which the drag chains start to take effect, Start(m) (units: meters/feet) and their Weight (units: tonnes or tons) are displayed in a list. To add new items, enter the required values in the entry fields and click Add.
Launching Parameters diagram
