Rocket Fin/pl: Difference between revisions
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{{Docnav |
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|[[Rocket_Bulkhead|Bulkhead]] |
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|[[Rocket_CenteringRing|Centering Ring]] |
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|[[Rocket_CompLaunchGuide|Launch Guide]] |
|[[Rocket_CompLaunchGuide|Launch Guide]] |
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|[[Rocket_Workbench|Rocket Workbench]] |
|[[Rocket_Workbench|Rocket Workbench]] |
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|IconL=Rocket_Bulkhead.svg |
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|IconR=Rocket_LaunchGuideComposite.png |
|IconR=Rocket_LaunchGuideComposite.png |
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|IconC=RocketWorkbench.svg |
|IconC=RocketWorkbench.svg |
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The cross sectional shape of a fin can greatly affect its performance at different speeds, as well as the looks of the rocket. A variety of fin cross sections have been implemented. Fins are created by lofting the root cross section to the tip cross section, so not all combinations of '''Root Cross Section''' and '''Tip Cross Section''' will produce useful fins. |
The cross sectional shape of a fin can greatly affect its performance at different speeds, as well as the looks of the rocket. A variety of fin cross sections have been implemented. Fins are created by lofting the root cross section to the tip cross section, so not all combinations of '''Root Cross Section''' and '''Tip Cross Section''' will produce useful fins. |
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* Square. Both the leading and trailing edges are squared. |
* Square. Both the leading and trailing edges are squared. |
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[[File:CS_Square.png|128px]] |
[[File:CS_Square.png|128px]] |
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{{Caption|Square Cross Section}} |
{{Caption|Square Cross Section}} |
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* Round. The leading and trailing edges are rounded. |
* Round. The leading and trailing edges are rounded. |
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[[File:CS_Round.png|128px]] |
[[File:CS_Round.png|128px]] |
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{{Caption|Round cross section}} |
{{Caption|Round cross section}} |
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* Airfoil. Uses the NACA symmetrical airfoil shape [https://en.wikipedia.org/wiki/NACA_airfoil NACA airfoil] with maximum thickness at 30% of the chord. |
* Airfoil. Uses the NACA symmetrical airfoil shape [https://en.wikipedia.org/wiki/NACA_airfoil NACA airfoil] with maximum thickness at 30% of the chord. |
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[[File:CS_Airfoil.png|128px]] |
[[File:CS_Airfoil.png|128px]] |
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{{Caption|Airfoil cross section}} |
{{Caption|Airfoil cross section}} |
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* Wedge. The trailing edge of the fin is square, converging to a point at the leading edge. |
* Wedge. The trailing edge of the fin is square, converging to a point at the leading edge. |
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[[File:CS_Wedge.png|128px]] |
[[File:CS_Wedge.png|128px]] |
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{{Caption|Wedge cross section}} |
{{Caption|Wedge cross section}} |
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* Diamond. The diamond shape starts from a point at the leading edge, straight out to the maximum thickness at a point determined by '''Length 1''', and back to a point at the trailing edge. |
* Diamond. The diamond shape starts from a point at the leading edge, straight out to the maximum thickness at a point determined by '''Length 1''', and back to a point at the trailing edge. |
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[[File:CS_Diamond.png|128px]] |
[[File:CS_Diamond.png|128px]] |
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{{Caption|Diamond cross section}} |
{{Caption|Diamond cross section}} |
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* Leading Edge (LE) Taper. The leading edge is tapered to a point as determined by '''Length 1''' |
* Leading Edge (LE) Taper. The leading edge is tapered to a point as determined by '''Length 1'''. |
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[[File:LE_Taper.png|128px]] |
[[File:LE_Taper.png|128px]] |
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{{Caption|Leading edge taper cross section}} |
{{Caption|Leading edge taper cross section}} |
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* Trailing Edge (TE) Taper. The trailing edge is tapered to a point as determined by '''Length 1''' |
* Trailing Edge (TE) Taper. The trailing edge is tapered to a point as determined by '''Length 1'''. |
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[[File:TE_Taper.png|128px]] |
[[File:TE_Taper.png|128px]] |
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{{Caption|Trailing edge taper cross section}} |
{{Caption|Trailing edge taper cross section}} |
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* Taper. The leading edge is tapered to a point as determined by '''Length 1''', and the trailing edge is tapered to a point as determined by '''Length 2''' |
* Taper. The leading edge is tapered to a point as determined by '''Length 1''', and the trailing edge is tapered to a point as determined by '''Length 2'''. |
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[[File:CS_Taper.png|128px]] |
[[File:CS_Taper.png|128px]] |
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=== Through the Wall (TTW) Tabs === |
=== Through the Wall (TTW) Tabs === |
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Through the Wall fins add structural strength by extending though the outer body tube to an inner body tube such as a motor mount. Instead of attaching just to the outside of the outer body tube, it can be attached at multiple points. As such, tthe height of the tab would be the distance from the outer diameter of the inner body tube to the outer diameter of the outer body tube. Other parameters would vary depending on requirements. |
Through the Wall fins add structural strength by extending though the outer body tube to an inner body tube such as a motor mount. Instead of attaching just to the outside of the outer body tube, it can be attached at multiple points. As such, tthe height of the tab would be the distance from the outer diameter of the inner body tube to the outer diameter of the outer body tube. Other parameters would vary depending on requirements. |
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[[File:TTWx4.png]] |
[[File:TTWx4.png]] |
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== Properties == |
== Properties == |
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{{TitleProperty|Rocket Component}} |
{{TitleProperty|Rocket Component}} |
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These parameters are provided for information and have no effect on the design of the component. |
These parameters are provided for information and have no effect on the design of the component. |
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* {{PropertyData|Manufacturer}}: Manufacturer when known |
* {{PropertyData|Manufacturer}}: Manufacturer when known |
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* {{PropertyData|Material}}: Material when known |
* {{PropertyData|Material}}: Material when known |
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== Scripting == |
== Scripting == |
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{{Docnav |
{{Docnav |
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|[[Rocket_Bulkhead|Bulkhead]] |
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|[[Rocket_CenteringRing|Centering Ring]] |
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|[[Rocket_CompLaunchGuide|Launch Guide]] |
|[[Rocket_CompLaunchGuide|Launch Guide]] |
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|[[Rocket_Workbench|Rocket Workbench]] |
|[[Rocket_Workbench|Rocket Workbench]] |
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|IconL= |
|IconL=Rocket_Bulkhead.svg |
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|IconR=Rocket_LaunchGuideComposite.png |
|IconR=Rocket_LaunchGuideComposite.png |
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|IconC=RocketWorkbench.svg |
|IconC=RocketWorkbench.svg |
Revision as of 14:54, 2 April 2022
Rocket Fin |
Menu location |
---|
Rocket → Fin |
Workbenches |
Rocket Workbench |
Default shortcut |
None |
Introduced in version |
0.19 |
See also |
None |
Description
Fins are used to aerodynamically control the direction of flight.
A Tapered fin with TTW tab
Usage
- There are several ways to invoke the command:
- Set options and press OK.
Options
Fin Type
At the moment, only trapezoid shape fins are supported. This will change as the workbench continues to be developed.
Cross Section
The cross sectional shape of a fin can greatly affect its performance at different speeds, as well as the looks of the rocket. A variety of fin cross sections have been implemented. Fins are created by lofting the root cross section to the tip cross section, so not all combinations of Root Cross Section and Tip Cross Section will produce useful fins.
- Square. Both the leading and trailing edges are squared.
Square Cross Section
- Round. The leading and trailing edges are rounded.
Round cross section
- Airfoil. Uses the NACA symmetrical airfoil shape NACA airfoil with maximum thickness at 30% of the chord.
Airfoil cross section
- Wedge. The trailing edge of the fin is square, converging to a point at the leading edge.
Wedge cross section
- Diamond. The diamond shape starts from a point at the leading edge, straight out to the maximum thickness at a point determined by Length 1, and back to a point at the trailing edge.
Diamond cross section
- Leading Edge (LE) Taper. The leading edge is tapered to a point as determined by Length 1.
Leading edge taper cross section
- Trailing Edge (TE) Taper. The trailing edge is tapered to a point as determined by Length 1.
Trailing edge taper cross section
- Taper. The leading edge is tapered to a point as determined by Length 1, and the trailing edge is tapered to a point as determined by Length 2.
Taper cross section
Through the Wall (TTW) Tabs
Through the Wall fins add structural strength by extending though the outer body tube to an inner body tube such as a motor mount. Instead of attaching just to the outside of the outer body tube, it can be attached at multiple points. As such, tthe height of the tab would be the distance from the outer diameter of the inner body tube to the outer diameter of the outer body tube. Other parameters would vary depending on requirements.
4 TTW fins attached to a central motor mount inside the outer body tube
Properties
Fin
- DANEFin Type: Defines the shape of the fin. At the moment, only Trapezoidal fins are supported.
- DANEHeight: The fin height.
- DANEProfile:
- DANERoot Chord: The distance between the fin leading and trailing edges at the root
- DANERoot Cross Section: The cross section shape of the fin at the root, see Options
- DANERoot Length 1: Usage depends on the Fin Root Cross Section and will apply to a taper length or similar, see Options
- DANERoot Length 2: Usage depends on the Fin Root Cross Section and will apply to a taper length or similar when multiple values are required, see Options
- DANERoot Per Cent: Expresses the Fin Root Length 1 and Fin Root Length 2 properties as a percentage of the Fin Root Chord
- DANERoot Thickness: Maximum thickness at the root of the fin
- DANESweep Angle: The angle of the front of the fin, with a vertical front being 0 degrees. This may be negative. Setting this value will cause the Sweep Length to be adjusted.
- DANESweep Length: The distance from the front of the fin root to the front of the fin tip along the x axis. This may be negative. Setting this value will cause the Sweep Angle to be adjusted.
- DANETip Chord: The distance between the fin leading and trailing edges at the tip
- DANETip Cross Section: The cross section shape of the fin at the tip, see Options
- DANETip Length 1: Usage depends on the Fin Tip Cross Section and will apply to a taper length or similar, see Options
- DANETip Length 2: Usage depends on the Fin Tip Cross Section and will apply to a taper length or similar when multiple values are required, see Options
- DANETip Per Cent: Expresses the Fin Tip Length 1 and Fin Tip Length 2 properties as a percentage of the Fin Tip Chord
- DANETip Thickness: Maximum thickness at the tip of the fin
- DANETtw: True when a tab for Through the Wall fins is required, see Options
- DANETtw Height: Height of the TTW tab
- DANETtw Length: Length of the TTW tab
- DANETtw Offset: Distance from the front of the fin to the front of the TTW tab
- DANETtw Thickness: Thickness of the TTW tab
Rocket Component
These parameters are provided for information and have no effect on the design of the component.
- DANEDescription: Description of the component
- DANEManufacturer: Manufacturer when known
- DANEMaterial: Material when known
- DANEPart Number: Manufacturer part number
Scripting
See also: Category:API and FreeCAD Scripting Basics.
TBD
Tutorials and Learning
Rocket Workbench Fins Tutorial on YouTube
- Jak zacząć
- Instalacja: Pobieranie programu, Windows, Linux, Mac, Dodatkowych komponentów, Docker, AppImage, Ubuntu Snap
- Podstawy: Informacje na temat FreeCAD, Interfejs użytkownika, Profil nawigacji myszką, Metody wyboru, Nazwa obiektu, Edytor ustawień, Środowiska pracy, Struktura dokumentu, Właściwości, Pomóż w rozwoju FreeCAD, Dotacje
- Pomoc: Poradniki, Wideo poradniki
- Środowiska pracy: Strona Startowa, Architektura, Assembly, CAM, Rysunek Roboczy, MES, Inspekcja, Siatka, OpenSCAD, Część, Projekt Części, Punkty, Inżynieria Wsteczna, Robot, Szkicownik, Arkusz Kalkulacyjny, Powierzchnia 3D, Rysunek Techniczny, Test Framework