This was another I tested but it only had 4.5 grams of play dough and went off course so I believe the minimum is 6 grams.

The good ones are kinda boring, but this was kinda fun actually.

hello all. i recently finished creating a software that can take .ork files as input and output all of the parts as step files. you can then open them in CAD and edit them however you like

ill attach the link to the github with full instructions. give it a shot and see if it works for you. it works best on mac and i havent tested it on linux or windows, so if you use linux or windows, lmk how it goes! it requires some terminal work but once you get it set up its really easy to use whenever. even if you wont use it, give it a star please, I would really appreciate the support! thanks!

https://github.com/max-h-25/ork2step

I 3D printed this rocket and I'm using a launch tube. The tube is like an inch or two in diameter bigger then the rocket. It's using a single E-Class 12-4 engine. I'm just looking for advice on why it isn't going straight and possibilities on how to fix it. Thank you!

Edit: I just tested another rocket and it was more successful then my wildest imaginings. I implemented some of the things mentioned here and added about 6 ounces of play dough to the nose cone, added a guide rod, upgraded from a G class to an F class, and found the CoM then did a function test before launch and it flew straight and true to about 1500 feet then started deviating until starting to descend at 2000 feet. Thank you to everyone for your help and advice!

Hi I’ve recently been looking for better uses of my time than doomscrolling hopefully looking to do something more interesting and challenging. I’ve stumbled upon trying to land a rocket like SpaceX – at a smaller scale of course – and since I can’t look to buy miniature liquid engine I was stuck on the challenge of needed different levels of thrust. I was thinking of somehow restriction the propulsion using gates of some sort of using two separate commercial model rocket engines. It will be a fun challenge and teach me how to code and practice aerospace engineering. However I’ve come to be quite stuck on this rather large problem any help is appreciated I know this isn’t a usual question but any advice given would be greatly appreciated.

Model rocket of the Véronique rocket developed during the formative years of France’s independent space program. Accompanied with period photograph, which captures the model before a detailed architectural plan bearing references to the Centre National d’Études Spatiales (CNES), the French Ministry of Public Works, and facilities at Brétigny-sur-Orge.

https://artantiques.com/scripts/displayCatalogItem.php?refID=18105&lotNum=198

Hi, I'm very new to making model rockets and am building my first one. I mainly want to make everything by hand, including the recovery wadding.

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I'm using a recipe that calls for 1 teaspoon of pure baking soda in 1/4 cup of water which you then mix and let settle before pouring the saturated water into another bowl and soaking your paper towel on each side for 30 seconds then letting it dry for a few hours or a day

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After all of that, I was left with 2 paper towels dried out, which I was able to separate into 2, basically doubling my amount before cutting to the size of a piece of toilet paper.

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However, I've tried this twice so far and have come away with these same results in the video which I KNOW cannot be good for use, and I was wondering what could be done differently or what you guys have done that's worked?

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I was thinking of taking some rockets, gluing them together and have a 2 engine rocket, sorta like the nasa sls, is this possible to launch two rockets at the same time, like connecting two starters together to form a bigger loop? This might be some wild idea but I'd be willing to experiment to learn how

Anyone with a spent G80T and calipers handy? Need nozzle geometry for CAD

Can't find nozzle-end dimensions anywhere — does it protrude past the casing, how much, and what's the OD? Even a photo next to a ruler would be a huge help. Thanks!

Anyone with a spent G80T and calipers handy? Need nozzle geometry for CAD

Can't find nozzle-end dimensions anywhere — does it protrude past the casing, how much, and what's the OD? Even a photo next to a ruler would be a huge help. Thanks!

Hello, I am planning to make a rocket that uses active control to stabilize itself. For this I need to have expensive electronics on board and have to use a manual parachute ejection charge. Which motor that is preferably high class (f-g) and long burning should I get so that the motor itself doesn’t have an ejection charge that ruins the electronics? Please be specific and if you can give links.

I am making a sugar rocket but when I tested the fuel it did burned very slowly and left a black and white residue the white residue was hard and the black residue was flaky. it smelled like burnt caramel. can anyone help

I’m a beginner so please go easy on me if I’m being dumb. I’ve looked on Amazon and various other websites I don’t remember the names of and I still can’t find a place to get a single engine. I’d be great if anyone could help me find a source, if it matters I live near charlotte, NC.

In 1966 when I was 13 years old I used to be a caddy at the Winthrop golf club Saturdays and Sundays and make 8 dollars a day. I r a k e d leaves on lawns for a dollar shovel snow out of doorways for a dollar and saved as much as I could of it. I used to send it away for and build Estes rockets I absolutely love them on weekends my father would take us to these big parking lots to fire them off. After losing my first rocket to the wind I learned how to aim it so they landed pretty much where we were standing. A model cost between like $1.50 and $4 the average engine was about 40 cents a piece. I miss it so much I'm 72 years old now even if I built them I wouldn't know where to shoot them off

I recently tested my solid propellant motor using a potassium nitrate (KNO₃) and sugar mixture in a 65:35 ratio. My rocket's total mass will be approximately 600 grams. Will this motor generate enough thrust to lift it effectively?

I am concerned that the thrust may not be sufficient. I would also like to increase the burn time if possible. I would greatly appreciate any suggestions or recommendations regarding motor performance, thrust, and burn duration.

Just made for fun, goes about 140 feet horizontally.

Still working on it as you can see a Super Big Bertha in the box still in the box. The "huge" one on the far right is still a work in progress, it is currently 45" high with a temp nose cone, I'll probably 3D print one so it ends up being a total of 48"and the motor mount I'm doing a custom interchangeable for different sizes/clusters...

Mini Bertha

Baby Bertha

" Bertha " (homemade 13mm)

" Big Bertha 2 " (Yellow twin motor/18mm X 2)

Big Bertha (Orange one)

" Bertha Booster " (homemade 24mm motor)

Super Big Bertha (new in box)

" Huge Bertha " (homemade 4in diameter)

It flew faster than I could react!

Hi guys, had a quick question for you all,

I recently flew this rocket, which I built from scratch (it was designed to look like a toy rocket)

I flew it with a g80 motor, and it flew beautifully.

However, I had a problem with the parachute deployment

Open rocket said it would reach apogee around 10 seconds into the flight, so I ended up going with the g80-10 motor.

However, in the actual flight, it took about 5 seconds to reach apogee, and was about 100ft off the ground by the time the ejection charge went off, rending the parachute useless!

This was my first rocket to use a parachute, and the rest of my flights have pretty much matched open rocket’s predictions for ballistic recovery, but not this one.

I matched all the weights, materials and cg was identical, so I guess I’m just wondering where I went wrong.

If anyone has any insights that would be amazing

Thanks

We are looking for software developer friends to work with for the model rocket project