Rocket Transition/fr

Description
Transitions are like nose cones in many ways. While typically conical, they can have the same shapes as nose cones, but are far more versatile.

The most common application is to change from one body diameter to another, such as between stages, or at the base of a payload fairing. It can also be used for a boat tail, where the diameter of the rocket decreases towards the exhaust nozzle.

Usage

 * 1) There are several ways to invoke the command:
 * 2) * Press the button.
 * 3) * Select the option from the menu.
 * 4) * Double click on a Transition object in the model view.
 * 5) Set options and press.

Transition Types
Transitions support all the shapes supported by Nose Cones, see Nose Cone Options for more details

Transition Styles
Transitions support all the styles supported by Nose Cones, see Nose Cone Options for more details.

In addition, transitions have one more style option, Solid Core. For this style, the transition is solid but with a hole from one end to another. One example where this might be used is a balsa transition designed to hold a body tube in the manner of a centering ring.





Clipped
Shapes such as an ogive or a parabola can be applied in one of two ways. The standard, non-clipped, treats the axis parallel to the central axis offset by the smaller of the fore and aft radius as the axis for drawing the shape. The clipped method applies a larger version of the curve centered around the transition axis, and clips the portion forward of the smaller radius. In this example, the non-clipped curve is drawn from x=0 to x=60 around the y=10 axis. The clipped version extends the shape along the x axis until y=0 and takes only the portion from x=0 to x=60.



For some shapes, this makes no difference in the shape of the transition, such as for conical or ogive shapes. In these cases, clipping is ignored.



Properties
These parameters are provided for information and have no effect on the design of the component.


 * : Manufacturer when known
 * : Manufacturer part number
 * : Description of the component
 * : Material when known


 * : Defines the shape of the transition using the coefficient when required, see Options
 * : Defines the style of the transition, see Options
 * : Defines the shape of the transition in combination with the Transition Type, see Options
 * : The length of the transition without the shoulders
 * : The radius of the base of the transition
 * : The radius of the front of the transition
 * : When the Transition Style is Solid Core, this will determine the size of the hole through the transition, see Options
 * : When the Transition Style is Hollow or Capped, this will determine the wall thickness of the transition
 * : Combined with the Transition Type, this defines the shape of the transition, see Options
 * : True when the transition includes a shoulder at the base
 * : The length of the shoulder
 * : The radius of the shoulder. This must be less than the Aft Radius of the transition
 * : When the Transition Style is Hollow or Capped, this will determine the wall thickness of the shoulder
 * : True when the transition includes a shoulder at the forward end
 * : The length of the shoulder
 * : The radius of the shoulder. This must be less than the Fore Radius of the transition
 * : When the Transition Style is Hollow or Capped, this will determine the wall thickness of the shoulder
 * : Used internally, this parameter defines the number of data points to use when drawing the outline of the nose cone

Scripting
See also: Category:API and FreeCAD Scripting Basics.

TBD

Tutorials and Learning
Rocket Workbench Transitions Tutorial on YouTube