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Recently, I have been building the Semroc Mars Lander. It's a well-designed kit (well, reproduction of a kit) and most of it makes sense. However, I've arrived at a step that I'm having a lot of trouble with, and nobody else seems to be having this problem. The step that is giving me trouble is...

I am building a 3-stage model rocket that goes D-C-C. However, I am confused about how to arrange the motor mounts. Could someone please post a diagram or something of how to do this? Thanks!

So, I have this one idea for a rocket I want to build. The only problem is, I want it to be staged, but the motors aren't next to each other. In fact, they will be 18 inches apart. (length of Estes a la carte body tubes) Is it possible to stage them without electronics?

I have a 24mm motor mount that is 95mm long. How can I add the 25mm adapter when using D12 and C11 motors (which are 70mm long) but remove it when using E9 motors (which are 95mm long)

I am building a linear-3 cluster rocket. The two side engines are 18mm (A/B/C) but the center is a single 24mm (D/E) motor. I only want the ejection charge on the center motor to fire. Are there any 18mm motors without a delay charge? (I know that the -0 motors don't have a delay charge, but I...