Hello! I‘m new at modelling with OpenRocket-15.03.
I want to build a rocket with the I405 motor by Loki Research, parachute and a starting pintle.
Of course, I want my rocket to be fast and my goal is to make it fly as high as possible.
Could you give me any general guidelines? Maybe, what to start with or which settings to adjust?
Thanks for your replies !!
Hi Poleena, welcome to the Forum!
To get the maximum speed and altitude from any 38mm rocket motor, just build a minimum diameter
rocket. Use very light and strong materials like carbon fiber
. Best design is 3FNC
, and no launch lugs or buttons. Build a "Launch Tower" to minimize drag, or use Fly-Away rail guides from AMW. Recovery and tracking (RF or GPS) is a big consideration due to the expected altitude. If you can get a JL Chute Release to fit, that would also help, however you may need to go DD
if your sim shows the full delay on the I405 is too short.
will help with the variable dimensions for the nosecone, air frame length and fin shape and size. Most folks would start with 5:1 for the nose and 10:1 for the air frame, and then use the "optimize" tool in Open Rocket to make adjustments to maximize performance.
Your goal is a high performance rocket that will break the speed of sound, and go 1.5 miles high. (based on a quick OR sim of a blackhawk29 upscaled to38). If you're not understanding some of the things I wrote, you might not be ready to attempt this.
Oh - I almost forgot... What's a Pintle???