Originally Posted by CPMcGraw

I agree, that C6-5 is the optimum motor in your list, and I would not recommend using any of the others. They are either at the edge of, or deep into, chute-shred territory. Getting about 670' on a C6-5 is good, though.

One thing I have to caution you on is the guide length. You call out a 36" x 1/8" rod, which is standard. However, you need to look at the flight summary. Double-click the line on the simulations screen where you flew the C6-5, and start reading through. You'll get to an area where it says "Launch Guide Data". RockSim says this design doesn't reach safe flight V until it's 38" up the rod. You're 2" short. This rocket needs a 48" x 3/16" rod using that motor, so that you get a full 38" of guide length. The extra won't hurt it.

Try simulating instead with the D13W-7. This is a composite D13 White Lightning. It jumps to velocity in only 20", reaches 1581', and has a Dv of just 5 FPS. Here is your optimum motor! Of course, it also has a Max V of 435 FPS, and an acceleration of 614 FPS/S. Really quick, but I think the TTW construction will hold up.

Good work for a RS9 first!