series and is based on rocket motor clusters.
Rockets are a big thing in my household. Like a REALLY BIG thing! My husband and our son build and launch high power rockets miles high in the sky! Actually we girls have built HPRs too, but the guys kept going bigger and higher. And all of us volunteer in some capacity at the Spaceport America Cup each year. I hope this collection can make your space (pun intended) more fun! Let me know how you use it!