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Motors acquired for LDRS. CTI 1xL1350CS, 4xI55MY

Well hello, Internet! It's time to revive this thread as I hope to fly this thing at LDRS! Many things have to happen. I need to fix the coupling of stages. This will involve making the outer tube structural and not relying on a stuffer tube. Also, I need to change the way the airstarts work...

Using a browser, try connecting to github.com. You may have blocked access for whatever reason. If you can connect then the add on manager should work fine.

Sorry, I need to update those instructions. Installing Git installs GitPython. Download the installer here: https://git-scm.com/download/win

At the moment the most useful workflow is importing from OR to produce 3D printable objects like nose cones, etc. or for CNC machining, laser cutting, etc. They're definitely complementary, not competitive. One thing I'd like to do for you is expand your list of nose cone shapes, but I have the...

Also, I know someone was asking about exploded views during vNARCON. This was done using the Exploded Assembly workbench. FreeCAD workbenches often work together like this.

New alpha branch of the Rocket Workbench available for testing. Installation instructions are available here: https://github.com/davesrocketshop/Rocket/blob/dev3_0/TESTING.md The current testing branch is dev3_0_alpha3_02042023 Many bug fixes, primarily in the UI: - Tree editing - Improved...

:) It's been there since the original version. I've been improving the UI over time, so perhaps it was that? Or is it like car keys "I swear I looked there!" when your wife points at them.

Sounds like you should use the Centering Ring instead. Make the center hole the right size for your eye bolt.

New alpha branch of the Rocket Workbench available for testing. Installation instructions are available here: https://github.com/davesrocketshop/Rocket/blob/dev3_0/TESTING.md The current testing branch is dev3_0_alpha2_01202023 Many improvements in this release: - file save/restore bugs fixed...

If you've followed the directions and it still doesn't appear, then I'd say the most likely issue is it's not seeing the git tool. The preferences page says you need GitPython, which I've never installed separately, but I have git tools installed for development. Perhaps the GitPython package...

Rocket Workbench with OpenRocket imports now available for testing. Like the rocket shown, this is an alpha meaning there may still be significant bugs so save important files. Installation instructions are available here: https://github.com/davesrocketshop/Rocket/blob/dev3_0/TESTING.md The...

Modelled after a rum bottle, using the container it came in. The name: Rum Runner 3D printed bottle shape and cap, layered cork for a true cork look, birch ply fins, and acrylic tube for the empty glass portion.

Wow. I knew this thread would have either no response or be a treasure trove of knowledge. Luckily it's the latter. Time to brush up some atrophied math skills. Thanks everyone!

For straight or symettrically tapered fins yes. In particular, NACA TN 685 has a lot of wind tunnel data. It also has a more generalized model for calculating flutter, but as you can imagine it's much greater effort to implement than this simplified model. So I started here first. I don't have...

The NACA 1497 is based on many simplifying assumptions. This one is no less reasonable.

Fin flutter is more about resonance within the fin. and FEM is used to model that resonance. FreeCAD can also do CFD but that's not typically how flutter is analyzed. Obviously that's an extremely simplified answer. Others may be able to explain it better.

FreeCAD uses CalculiX for FEM, and it's included with the distribution. I've already started looking into creating a workflow specific to fin flutter, but that's going to take time. In the meantime, this method is available now, and it's been proven solid. It won't handle all possible cases...

Yes, and I've already started looking into that. FreeCAD has FEM capabilities as well. But, starting with the simple first...

Yup. Just wondering if anyone had come up with any corrections that would allow for this. I knew the answer before I asked but it was worth a shot.