Too Stager 2-stage model rocket

thingiverse

Yes...I named a 2 stage rocket "Too Stager". Or more precisely, I didn't bother to actually give it a name so I named it what I put on the folder the project files lived in.In any event this is a 2 stage rocket (duh!) that flies on a 24mm booster to an 18mm sustainer. The booster tumbles down while the sustainer comes down on an 18" chute.To build this rocket you will need:457mm of BT-60 (42mm) body tube for the sustainer (length determined by the mathematical process of "that's what I had laying around")70mm of BT-60 body tube for the booster (because that's how long a motor is)...though Estes does make E12-0s so I guess you could use a 95mm tube to build for that.20mm of BT-80 (66mm) body tube for the Sustainer "ring".60mm of BT-80 body tube for the booster ring (increase to 85mm if your building for an E sized booster)70mm of BT-20 (18mm) body tube for the sustainer motor tube.70mm of BT-50 (24mm) body tube for the booster motor tube. Increase this to 95mm if building for an E sized booster.Shock cord, I used kevlar line.18" parachute for the Sustainer.The parts in this thingI painted the booster chrome to make it easier to see, but color it as you wish. Simulations say the booster separates at just over 300' but despite what you hear on the video, it was easily visible on the way down. I found it just 12' from the launch pad.When you build it, dry fit the pieces of the booster together and the bottom of the sustainer to get an idea where everything should go. The bottom of the sustainer body tube and sustainer ring should slip OVER the tops of the "coupler" and "BoosterFins" part. Those two part should stick up about 4mm above their respective tubes and the "18mmBase" should be recessed a little (Mine is about 4.5mm) in the bottom of the body tube. Play with these until you are comfortable with the fit.If you're making a version with an E sized booster, you may want to increase the height of the "BoosterFins" part by 25mm to account for the difference in size. There are no launch lugs on the booster, but you'll have to align the gap in the internal fins with the lugs on the sustainer.I've included to OpenRocket (ORK) files, one for both stages and one for just the sustainer so you can run your own simulations.Video of launch:https://www.youtube.com/watch?v=Il76cg0ssWI