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Is there anywhere I can find a comprehensive list of motors that are currently available with no included thrust rings? So far I know of: - Most if not all Loki Research motors (the thrust ring is removable) - CTI 29mm and 24mm reloads (via the tailcone closures) Are there any other options...

I'm working on some drafts of a large-scale Saturn I model and have been running into some conflicting info on my simulations. Without help, the CP on the Saturn I Block 2 is fairly far forward: However, it's a fairly short rocket at 7:1 fineness ratio, so I thought the base drag hack might...

So with my Black Brant waiting for a field, what better time to start another project? One of my longtime ambitions has been to get on the Tripoli records leaderboard, and with single-stage being very optimized these days, I figured multistage would be a better place to set my sights. I'm not...

Here's my entry for the 3D printing contest. It's a BT-60 (~1:93) sport-scale Apollo capsule and LES tower base, made for my 3" Saturn 1B. The LES motor itself is not part of the design- it's made from a 1/4" dowel. It has flown twice- my profile pic was grabbed from flight 2. Printed on a...

Anyone have a good dimensioned drawing for the Falcon 9 Block 5? I'd love to build one in either 3"/29mm/18mm outboards or 4"/38mm/24mm outboards... I googled a bit but didn't find anything on the B5, just the earlier versions.

This is an idea I've had kicking around for a while now. My plan is to start with the LOC 3" Black Brant X and build a custom Terrier booster for it. My approach will involve a lot of wood glue and laser cutting, and should hopefully be able to take just about anything I can throw at it. Since...

https://www.youtube.com/watch?v=Eauxlp1wN8Q Start at 3:24 I would assume there aren't too many other users who end all their messages in "Later! OL JR:)"...

I'm plotting an evil plan to build a staged Black Brant X sounding rocket, and, long story short, I can't figure out where it separates. PML seems to think it's below the transition: But if the "middle" stage is a Black Brant V, then it shouldn't have a boattail: (huge image)...

So I was exhibiting some of my rocketry stuff at a local maker faire today when I noticed this: It's a bit hard to see, but that's a CTI Pro29 nozzle with a small chip out of the lip on the shoulder. Is this still OK to fly? I would guess not, but I'd just like to see what people think.

I've wanted to make an Aerobee sounding rocket for quite a while now. I have an Aerobee 170 scale drawing downloaded off the Interwebs timestamped 11/16 that I never even put mouse to OpenRocket for... Fast forward to recently, I got a copy of Rockets of the World. One of the first models in the...

So I want to build a MPR to low HPR multistager at some point in the future. My question is this- Has anyone used allthread rods in conjunction with a stepped thrustplate as a means of staging, rather than a conventional coupler? I'm thinking of something in the LOC 2-3" range with 29 or 38mm...

The title says it all. Anyone know the CG/CP for a stock Blackstar Voyager? I'd run it through OpenRocket, but there really wouldn't be much point...

So I'm planning a far future scale modeling project that needs a tube 1.5" in diameter. I immediately thought of 38mm couplers, but I need it in 15.5 inch sections. Does anyone sell cardboard 38mm couplers in longer sections? The only one I've found is Blue Tube which I'd rather avoid as this...

Is there any reason this wouldn't work? I'm thinking of getting a small Loki case or two and the only thing I haven't decided on is igniters. By measuring one I have lying around the igniter is about 10" long, so seems like it would be close to long enough for the 38/480. If not, does anyone...

So with my twin MPR scale models close to wrapping up I'm already thinking about my next project. My current idea is my first true HPR rocket, planned for once I get my Junior L1 cert but still light enough to fly on heavy MPR motors. I also like scale and scale-like models, so gotta factor that...

I'm starting a thread of designs I'm somewhat proud of... I'll try to put together some basic instructions as well, but I won't guarantee anything. This will be a similar idea to Neil_W's half-baked design thread but the other end of the assembly line- finished designs that people might be...

Seems like it would be a good way for the various devs that frequent the forum to know what's going on in OR, similar to the OR Wishlist thread. I'll start off... -For awhile search bars in the preset menus have been incorrectly sized. The bar starts at zero width and expands if you resize the...

Quick question- I was looking at getting a 24mm RMS case and noticed the E11J motor. "Ooh," I thought, "What a great motor for light rockets when I want a bit of altitude!" Then I realized that it only has one delay: 3 seconds. Why? What's the obstacle against making, say, and E11-6J?

So at my local club launch recently I saw a few rockets fly that basically were high-power spools. Every time the motor would make a noise almost like the video I've seen of hybrid motors and very much like a Skidmark- a loud buzz-ish part to the usual roar. Has anyone else seen this with very...

So I'm thinking about upgrading my current 18mm min-diam rocket to a more efficient airframe. I simmed it in OR and got ~3000 feet on an AT D10-7, in the ballpark of what I would expect. But when I re-did it in RASAero, it said around 4000-4500 feet, which I would think would be WAY more than...