Consider a 24mm minimum diameter cardboard rocket. OK it's not really minimum diameter, it's more like a rocket with a full-length MD stuffer tube, but that's near enough the same thing, as far as this question goes. But this is in no way a high-performance rocket. I'm trying to figure out a straightforward way to build a traditional LPR motor mount for it. So that includes a hook, an engine block up front and a Kevlar attachment.
Inserting the engine block from the rear seems like a bad approach, as does pushing it down from the front (down a long tube). A better approach seems to be using a coupler as the engine block, like this:
I think I saw something like this in some Estes instructions. Insert the hook, push the coupler down against it, and then connect the body. This looks pretty good to me, very simple and effective, and no exotic techniques required.
This leaves me a bit stumped about how to anchor the Kevlar. I've seem some different approaches but none that completely satisfy me. What are some good options?
Inserting the engine block from the rear seems like a bad approach, as does pushing it down from the front (down a long tube). A better approach seems to be using a coupler as the engine block, like this:
I think I saw something like this in some Estes instructions. Insert the hook, push the coupler down against it, and then connect the body. This looks pretty good to me, very simple and effective, and no exotic techniques required.
This leaves me a bit stumped about how to anchor the Kevlar. I've seem some different approaches but none that completely satisfy me. What are some good options?