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If you are not sure or not able to commit to a regular donation, but still want to help the project, you can do a one-time donation, of any amount.

Choose freely the amount you wish to donate one time only.

We call sponsoring the act of donating money recurrently to the FreeCAD project. You can do that as an individual or as a company or institution, through different channels or platforms, depending on your preferences.

Sponsoring FreeCAD allows its developers to count on a steady flow of income, so it allows the FPA to plan things ahead, and the FreeCAD developers to invest themselves more seriously into FreeCAD.

To encourage persons and companies to sponsor the FreeCAD project, we have created different sponsoring tiers. When donating regularly to the project, unless you prefer to stay anonymous, your name, company name and/or logo will be featured on this website, depending on the tier you fit into:

♥ Normal sponsor : from 1 USD / 1 EUR per month. You will not have your name displayed here, but you will have helped the project a lot anyway. Together, normal sponsors maintain the project on its feet as much as the bigger sponsors.
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🥇 Gold sponsor : from 200 USD / 200 EUR per month. Your name or company name and logo displayed on this page, with a link to your website and a custom description text. Companies that have helped FreeCAD early on also appear under Gold sponsors.

Instead of donating each month, you might find it more comfortable to make a one-time donation that, when divided by twelve, would give you right to enter a sponsoring tier. Don't hesitate to do so!

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Please inform your forum name or twitter handle as a notein your transfer, or reach to us, so we can give you proper credits!

GuiCommand: Name: Rocket CenteringRing MenuLocation: Rocket , Centering Ring Workbenches: Rocket_Workbench Version: 0.19

Rocket CenteringRing

Description

A Centering Ring is a solid object used to hold one or more body tubes inside another body tube.
Conical

Usage

There are several ways to invoke the command:
- Press the Centering Ring button.
- Select the Rocket → Centering Ring option from the menu.
- Double click on a Centering Ring object in the Tree view.
Set options and press OK.

Options

Notch

Centering rings, especially those used for low power rocketry, often need a notch to accommodate an engine hook. The Centering Ring tool can generate those for you.

Centering ring with an engine hook notch

Properties

{{TitleProperty|Bulkhead}}

These properties are inherited from the Bulkhead, see Bulkhead for more information.

Diameter: The outer diameter of the bulkhead
Hole Center: The distance from the center of the hole to the center of the bulkhead
Hole Count: The number of holes applied in a radial pattern around the center of the bulkhead
Hole Diameter: The diameter of the hole
Hole Offset: Offset from 0 degrees of the first hole
Holes: True when the the bulkhead has one or more holes, see Bulkhead Options
Step: True when the bulkhead includes a step, see Bulkhead Options
Step Diameter: The outer diameter of the step
Step Thickness: The thickness, not including the bulkhead thickness, of the step
Thickness: The thickness, not including any step, of the bulkhead

{{TitleProperty|Centering Ring}}

Center Diameter: The diameter of the inner hole
Notch Height: The notch height
Notch Width: The notch width
Notched: True when the center hole includes a notch, see Options

{{TitleProperty|Rocket Component}}

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

Description: Description of the component
Manufacturer: Manufacturer when known
Material: Material when known
Part Number: Manufacturer part number

Scripting

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

TBD

Tutorials and Learning

Rocket Workbench Body Tubes, Bulkheads, and Centering Rings Tutorial on YouTube

⏵ documentation index > [API]] and ](wiki-test2.php?gitpage=Category_API]]%20and%20) > Addons > External Workbenches > Rocket CenteringRing

This page is retrieved from https://github.com/FreeCAD/FreeCAD-documentation/blob/main/wiki/Rocket_CenteringRing.md