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The original inspiration for this rocket came from here: https://www.rocketryforum.com/threads/which-rockets-seem-to-break-most-easily.170460/#post-2230520 And I figured I'd start a new thread here for the rest of the build and flight results.

My son saw the corkscrew rockets as described in a recent Sport Rocketry magazine and thought that would be a fun rocket to build. He drew some initial concept art... And then some more formal engineering plans: At which point I was consulted to help generate a simulation file. After...

Brand new motor, complete, never been used. Includes plugged forward closure. Also 4 reloads: I161, I245, H112, H999. Available for pickup only at Red Glare. As of now, my plans to attend ONLY include Friday (NOT Saturday or Sunday). I prefer cash & carry on the spot. I'd be willing to...

This is traditionally been the initiated by K'Tesh, but since he's busy at the moment, I'll kick off the thread for 2023. I'm going to assume that most people have it figured out by now, if you want the full details I'll refer you to his first post for 2022 which covers it in great detail...

I've been reading through many of the 2-stage threads here, and the overwhelming preference seems to be for lighting the sustainer from the sustainer. I can see the advantages: Separation charge to get booster clear of sustainer before ignition Sustainer still lights even if booster...

If I understand correctly, with a Level 1 HPR certification, the total impulse must be <= 640.0 Ns. So, for example, I could not fly a RMS 38mm/360 H550 ST (320.0 Ns) + I180 W (326.0 Ns) = 646.0 Ns. But I could fly DMS HP-550 ST (312 Ns) + I180 W (326.0 Ns) = 638 Ns, or even a H550 ST (320.0...

I kept staring at this photo thinking it looked awfully familiar, but I couldn't place where I had seen it before. Then I realized it strongly resembles @rharshberger 's Avatar. Is that you? If so, nice rocket.

I haven't got any proper rocket builds going on at the moment, but this electronics project could have some relevance for rocketry. Although GPS based systems (I'm a fan of the Eggtimer stuff) are usually the preferred tracking solution, there may be cases where a GPS module doesn't fit, a...

I have a new, never used 38mm 6GXL case, but I'd rather have a 5G case. Is anyone interested in a trade?

I bought this second hand, so I'll assume it is used, but the motor case looks brand new to me. Includes the aft closure, 1 spacer, and an Aeropack retaining ring (not the retainer body). Asking $60 plus $10 shipping to continental US. The ring does look like it has probably seen some use...

It started with neil_w's "imagination fuel" post, it got me firing on all cylinders, so to speak. I really love airplanes that look like rockets, and rockets that look like airplanes. As he observed: and that challenge makes these candidates for an even more fun scratch built project. I...

I like all sorts of rockets including odd-rocs, scale rockets, unique rockets, spectacle rockets. I like jet rockets, sci-fi rockets, and I love futuristic hypersonic planes. But sometimes I just want to put a big motor in a rocket and send it. When I got my Level one last year, I had several...

I was considering a parachute cannon or chute release for my latest rocket, there isn't room for a traditional DD setup. As I was mulling over possibilities, the thought of doing the following occurred to me. The altimeter is in the nose cone, and drives a servo to release the main parachute...

After seeing an H999 launched last summer, I've been thinking about building a rocket specifically for high acceleration flights. I want to try to get an idea of how much acceleration can "normal" HPR techniques handle (40 G? 50 G??), so I'm curious to hear your experiences. What failed, and...

Galleries for all kits originally released by Mach 1 Rocketry.

A few clips from Saturday:

I'm weighing the pros and cons of a cable cutter vs parachute cannon (for my Celestial Jet) and seeking more opinions and experiences. A parachute cannon seems more straightforward to me, but there seems to be a preference for cable cutters here. One question I have about cable cutters is...

The 2019 Rocketry Goals thread had a lot of good stuff in it. What do you have now for 2020?

I had a sudden urge to build a rocket (that happens to me on occasion) and I wanted it to look like a jet. I especially like designs by Shrox and borrowed some inspiration from him while perusing this thread. The result was this: For a starting point, I used the BT-80 body tube with 29mm...

I found this book on my shelf recently, I had intended to pull it out this July 20th, but that date slipped by. What were your predictions for the future? Which ones turned out to be right? Wrong? What were the most remarkably wrong (or right) predictions from others that you heard?