Solid Rocket Motors 1: Design
ฝัง
- เผยแพร่เมื่อ 2 ก.ย. 2019
- Description:
Hi Rocketeers!
In this series of videos I want to teach you how to mix your own professional grade solid rocket motor. Far safer and much more efficient than your typical rocket-candy motors, we'll explore the intricacies of grain geometries, simulation software, graphite nozzles, and aluminum cases, all while providing links to reputable suppliers.
In this episode we're looking over the design of the grain geometry of our motor, and exploring how to use the simulation software OpenMotor.
Links:
/ charliegarcia
wikis.mit.edu/confluence/disp...
github.com/reilleya/openMotor...
www.nakka-rocketry.net/
www.garciasystems.space/solid... - วิทยาศาสตร์และเทคโนโลยี
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I have the feeling that BPS.Space will be following this very closely...
They are close friends, and he already appeared in a previous video for bps about propulsion
No actually I'm just doin research for a project of mine
Wait ur not talking about me r u? Nvm
Wow i'm happy finally you've made tutorial for SRBs, liquid fuel is high above my budget, and TKOR tutorial did not look proffesional.
Mikicat way to dance on Grant’s grave jerk!
@@storminmormin14 that mekes no sense.
Amateur Asian *decrepit
@@storminmormin14 as lord nianite said, fact that he is dead, doesn't change fact that tutorial is bad. I don't say he was bad person
TKOR’s video is great as it’s for lower powered rocketry these are high power rockets that need a lot more calculation and accuracy.
I miss Grant and his video is great but it’s not for higher power.
This is absolutely AWESOME! What an incredible program you and the other programmers have put together. I just ran through my first simulation and cant thank you enough.
Always happy to help others build rockets!
I appreciate the "rapid disassembly of your rocket motor". "Just like you are never lucky. Optimal results are produced which are difficult to duplicate" . Great explications and information. Thank you .
"Dangerous and illegal candy rockets." I feel attacked
gatekeeping space
Yay no sugar motors! Finally a proper video series. People think solid propulsion is simple, though it's vastly complex and not about packing sugar and potassium nitrate in pvc pipes that blow up.
I have been working with sugar rockets for a long time now, and if it is exploding is due to the case walls being too thin for its size or the propellant being too brittle. The first one can be solved by just using an aluminum case and calculate the max pressure that the case can handle. There are several websites that has a calculator for that. For the propellant, use 10% sorbitol, 25% sugar powder, and 65% nitrate. Good luck and happy flights!
your incompetent.
@@titahibayflier3160 you're*. If you're going to insult someone, at least use proper english
@@adityaramesh1764 i speak it better than you.
Titahbayflier I doubt it, considering you can’t use the correct ‘You’re’.
Thank you for another well researched and compiled video: you always save me so much googling and your video descriptions keep my bookmarks bar less cramped!
The exact kind of video I was looking for on the subject. Technical information and math based simulations instead of PVC pipes and hot plates. Thank you for your work on this!
Just discovered this channel, it deserves way more visibility
THANK YOU. way to work on giving back to all of us with open source! We appreciate it
Gosh, just finished my Bachelor thesis where I was developing and testing a SRM and just after it's done you show me how to do that properly? :D
Thank you so much! I'm really keen to build a solid rocket.
Thanks for making easy to understand content!
Thanks for the insight and knowledge, here's to learning.
Video came after i built one , much to learn from this
I have been in model rocketry for a while now. As of late, I’ve wanted to widen my field of expertise by moving into the armature rocket field. I’ve had trouble finding a good, informational startup. So thank you for making this! I guarantee others feel the same I do!
my boiiiiiiiiiiiiiiiiiii
I like the bow tie, doctor! ;-)
This is an excellent description of how to visualize and model the way material is burnt through on a solid fuel engine. I assume these ideas are true for even the largest of solid rocket boosters.
Great video but one thing that's a bit distracting is the sound. It sounds like you're using the cameras mic or one mounted on the camera. I'd recommend a lav mic to reduce the echo which is kind of inevitable when filming in a bigger room. Anyways I'm pumped for part 2, bye
Great video. This series is going to be so informative. What are some of the longer burn times achievable?
This is a great tutorial! Keep it up man!
really awesome Charlie. thx.
thanks for starting this siries !!! , i was searching something same
I am developing formulations for ultra high temperature resistant coatings for aerospace.
This by far the most informative and interesting tutorial on rocket motors.
This really helped me, thanks!
This is awsome. Thank you so much.
Your a smart man. Very informative
Thank you. I shall be watching the series closely. I really want to scale to APCP but it is difficult to obtain the materials in the EU :(
Yay new video!
This will be helpful either, thanks
Yooo what's up min, I see we'll blow ourselves up together
@@cams1365 yo stel
Oh hey
I am ecstatic that I found this channel.
Hi, thank you very much for this content. A question: can the software openmotor plot the height, speed and acceleration as functions of time? Or alternatively, is it possible to export the thrust plot and the mass plot as functions of time into matlab? Thank you, this would be very helpful.
great video☺️☺️
Would be interesting to see a video on the openMotor software. I'd like to find some tool to predict combustion chamber oscillations/acoustic resonance; I don't think the tool as it currently stands can do that... or can it?
I'm no programmer, but I'd love to see the ability to design different types of nozzles in open motor.
Aero spikes of varying geometries in particular.
Hi Charlie,
Friend of bps space.
Did You plan to do building hybrid motor series in future?
Can floor coating epoxy be used? Or fast drying polyurethane? I can't seem to find HTPB in hardware stores. What is it used for?
Cool video. Would love to have Metric measurements where possible.
Hi Charlie, your openmotor is a graciously superb software for rocket amateurs and students. I tried playing around with the openmotor. But I am unable to get the values clear for customized propellant. For example if i try enter a Ammonium Perchlorate - HTPB based propellants, the thrust is being shown as zero. Could you please put a video or give me suggestion on how to enter our custom propellant properties.
Neat video! Referencing that gif with the sections--it always baffled me that the SRBs for the Space Shuttle had segmented grains and with dynamic seals...do you have any insight on the topic?
This is a very interesting topic, maybe I'll make a video on it someday.
Does one require a high powered rocket certification to build one of these for testing purposes, ie. not with the intention of flying? I want to build a solid rocket motor as a summer project, but I don’t necessarily want to fly it.
Hey any idea on increasing the burn time I am using a knsu prop and Bates config and 5inch and 2inch grain
great video Charlie, looking forward to the next... I think it would be great to have Potassium Nitrate propellant available in OpenMotor... great to compare with the other options... where can I get Burn Rate Coefficient, Burn Rate Exponent, and the other required values to create a KNO3 based propellant in open motor?
Potassium nitrate based propellants, especially the sugar ones, exhibit piecewise burn rate behavior that software upgrades will be required to model. They should be in the next version of OpenMotor. The process you use to make your propellant can have a significant effect on it's burning properties, especially for KNO3 propellants which use heating. You'll need to conduct a careful characterization of your propellant or find someone who has published their formula and procedures along with characterization data.
@@AstroCharlie Thanks... I understand the difficulty... I wish we could characterize the propellant we are using ... unfortunately, we just don't know how and I don't think we have the equipment to do it (we are a bunch of software engineers with a passion for high powered rocketry)... any pointers on documentation on how to do it or where to find approximations that we could use?
If you can wait, I'll pencil it in as an episode 8 or so of this series. Otherwise I'd look up Nakka Rocketry.
@@AstroCharlie We'll be glad to wait... we still have some pending items that are still in progress so just let us know... we'll be glad to share results with you if you are interested...
Is there a differential equation that can be formulated that will tell us the burn radius as a function of time? I would like to study how the burn radius is effected with different propellent grain geometries.
Hey Charlie, great video! Just wondering if you could make a video regarding the propellant (cherry limeade) and the procedure to make it for ourselves. Also, are there any other alternate propellants that amateurs can use that are safer and better than sugar based propellants but are still relatively easy to make?
Cherry Limeade is about as easy to do as APCP gets. There's not much in the middle in terms of ease and safety vs performance.
Hi Asel! Did you ever find a video on how to make the fuel? I too am looking for one and have had no luck so far. Thank you!
I want to make a 38mm diameter rocket motor 500mm length and about 900N thrust.. how do i customize my motor with openmotor? From where do i get these dimensions to make a cd model?
If my memory serves, I fist saw that gif used on a Discovery Channel show with Dan Michaels and Pat Gordzellic. I think it later showed up on Loki Research may have made it for the show since it is Loki Blue but it predates the current owner.
Thank you!
@@AstroCharlie I believe that the gif was created by/or For Dan and Terry Stroud (his son) and it was definitely used on Discovery Channel in reference to the Aurora Project Rocket -google Dan Stroud Aurora Project Rocket
When I use OpenMotor, it wants me to make my throat diameter much smaller than my grain cores. In your video, your cores are the same exact diameter as your throat and it works fine for you. It wants me to either make my cores huge or my throat dangerously small. And do you know where to get the specs for R-candy?
Can open motor work with a single propellant grain? Thanks.
What software are using ?Do you have any video on stage seperarion or explosive bolts ?
th-cam.com/video/H89Msbs7-JA/w-d-xo.html
This video provides some methods of stage separation for model rockets.
Depending on your scale and layout a servo system could also be used to hold the rocket together.
I'm not sure how big your project is supposed to be 😂
The software he's using is called OpenMotor
I followed the link on this reddit post:
www.reddit.com/r/rocketry/comments/bub2wj/openmotor_a_free_opensource_internal_ballistics/?
Does this fuel work without the oxidizer? (Since i wanna build a hybrid engine)
If I assume chamber pressure and Based on this assumption i design the nozzle , how can I be sure i can achieve this pressure inside the chamber ?
This is awesome! Are there any permits I would need to be able to make this or is it legal without any? I’m 15 and in Colorado if that helps, thanks!
Hi Kai, most states have their own rules regarding rockets. The best advice I can give you is to find a local Tripoli Rocketry Association chapter. They can give you all the details and often have all the equipment you need to start, so you can see if you like it while working with an experienced mentor.
Hi ! I am working on a project for Solid Rocket Motor Design and the dimensions of the grain are quite large. Softwares like Open Motor and Burn Sim only are restricted to certain dimensions of the grain diameters that may be sufficient for hobby scaled SRMs. Further it has only a number of propellants. Is there any software available that would be doing internal ballistic analysis for larger dimensions and propellant composition of my own choice? Your response would be highly regarded
In addition to that I came across a number of thesis on different numerical approaches for internal ballistic analysis and performance prediction of SRMs but none of those papers provide any generic code for performing the analysis rather they just explain their methodology and validation of results. And the work that I am doing limits me from creating a numerical code myself.
Which material used to make motor frame ??
please tell me the KNSB fuel consists of KNO3 and sorbitol?
Try add 5-ATNO3 in the solid fuel to get extra juice😎
Hello Charlie, I downloaded the openMotor software and after unzipping the correct fille to my OS i'm having problems in executing the program. The archives in the fille are in a format compatible with Python, and I guess because of that i can't run the program. Do you know if there is some way to run the program without using Python?
Unfortunately, it's written in python, so no, but there should be an executable version on the github link.
Thank you @@AstroCharlie ! I found that version and it's working
Is there a way to configure openMotor to use metric? Or is that still to be done?
Preferences / Units (at least thats how it goes in mac... i havent seen the sim running on other platforms)
I need full series desing, building and making fuel.
Can you use steel as a,case for it?
how can I configure KNSU propellant in the software? anyone have the data requiered to configure in the program? I'll thanks a lot...
But the real question is can I use this SRM to propulsively land? 🤔
@Lars Dijkgraaf yeah we kinda do the same thing as him ;P
No you need throttle control to be able to land so you have controlled deceleration.
I'm thinking of putting together a kit design for a small hybrid motor to help all these teams that are looking to do these mini-Space X programs, its just too painful watching guys crash rockets. Especially when you have all mastered the complicated control side which is the more difficult part.
Ill put something together & create a video soon.
@@jamieanderson6786 throttle control would certainly help, but if you look at BPS.Space's Echo drop test 4 or 5 you'll see how close he is. It is possible to do with only solid rocket motors-- perhaps not to the accuracy and elegance of Blue Origin or SpaceX, but definitely possible!
Your project sounds really cool tho! keep us updated because it is the kind of thing we would definitely be interested in!
yes if using different chemicals
@@OrionAerospace one thing that would also be worth a look at is a main solid engine with smaller liquid engines(or something like monopropellant or hybrid) for fine control.
Good stuff, my plan is to modify the source python so that It can simulate hybrid performance instead. Wish me luck LOL
I'm here because my local regulations are so strict that even cigarette lighters require a high explosives licence to operate or purchase...
Hey im not able to install open motor..
Any help?
When he says "port" does Charlie mean the diameter of the core?
A much simpler propellant formula is AP and iron oxide or lamp black, and HTPB R45M binder.
Can You Please Tell Me How Rutherford Rocket Engine Work Please ?
It is almost a conventional LOX/RP1 rocket engine. The unique feature of the engine is that the propellant is fed into the engine by electric pumps rather than a turbopump. This makes the engine much easier and cheaper to manufacture (it can be 3D printed) and also decreases its weight and complexity. However the electron rocket (using these engines) has to carry 250 kilogramms of lithium polymer batteries to power the motors (the total takeoff weight of the rocket is 12 tons). To save deltaV, the batteries are being jettisoned during the flight.
@@matecser7256 Any specific know how on the injectors?
@@matecser7256 I Know All These Thing Buddy , I Wanna Know How It's Injector Works What Are All The Components ( Like The Two Blue Cylindrical Tanks , That Red Big Tank Etc ) Where Are The Fuel And Lox Inlets Etc in details
@@Maxx_751 The blue cylindrical tanks are used to gimbal the engine. They are most likely hydraulic pistons. I'm pretty sure, that the red ones are the two engines (one for the fuel, one for the oxidizer). I have no idea what kind of injector geometry is used. In my opinion it is most likely, that they are using an impinging injector, since it is commonly used, meets the design requirements and relatively easy to manufacture (though i'm not sure about 3D printing). The engine is regeneratively cooled with RP-1. That is why there is a pipe going down next to the nozzle. The ignition is most likely done with a hypergolic fuel, since spark ignition doesn't really work with RP-1.
This is probably as detailed as you can get. It's obvious why Rocketlab doesn't release all the information about their rocket engine. There are parts we can only guess.
@@matecser7256 Thank You Buddy For Giving Me The Information , I Have Came To Know Many Things Which I Wanted To Know , Thanks 😊
Could u make it with only paper fuel
Hey guy you know the reason the sugar stump remover Motors are interesting and not nearly as powerful is because you don't have to have a degree in science to produce one like what you're doing don't get me wrong this is pretty cool what you're doing but you need to dumb it down a little for us folks that ain't mathematicians but yeah pretty cool but I'm trying to figure out how to melt the sugar motor so a guy can just pour it into the tubes and I'm not planning on putting anything to the Moon I just like watching things go up in the air that you build out of what you can buy out of the grocery store so your videos pretty cool keep after it one of these days I might learn how to run a calculator that way cool guys
Ok question, and I know some people in the comments will hate me for this, but is there a way to use all this info for making a rocket based jetpack?
Don't hate me...
Not sure but since you can't turn off solid rockets motors after igniting them you can't use solids. Maybe liquid engine but given its a rocket engine its probably not safe no mater how well designed it is.
The graph doesent show up. I dont know why
Good, but did you forget about Mars Climate Orbiter?
Like this. My application is for a device which is lower thrust than a typical rocket engine but burns for much longer. The idea is this would be used to power (say) a drone by replacing expensive and complicated devices like propellers and turbines with a cheap disposable engine which is simply replaced when used up. Anybody here know about such an engine, or could one be modified from current technology by retarding the combustion rate?
I am interested in the same topic for a different application. Moderate thrust for a long duration. Tech Ingredients has some interesting rocket motor stuff.
The thing about solid rockets is you can't easily control their thrust output at will on a small scale (which isn't to say you can't control the thrust output at all, the easiest way is to widen your nozzle so it compresses the exhaust gasses less... you can also find a slower burning fuel, but that presents it's own challenges), so it's basically a one and done type deal.
This is less ideal for prolonged flight and more ideal for gaining quick bursts of speed on take off, at altitudes where a propeller won't be effective, on your way home or other scenarios.
For take off it would be best to have the rocket be detachable from the main drone via some servo arms, a parachute keeps the booster from hurting anyone. This keeps the drones drag and weight to a minimum, maximizing flight times while also getting it to altitude/velocity in a short amount of time without using the primary energy source.
For smaller boosts of speed or operation at altitudes where your propeller is ineffective it'd be best to have the motor be smaller and built into the drone itself.
Just make sure the drones can handle the g-forces! (It's wings most importantly)
Is there electric propeller engine same as rocket principal.
Yes, but no... Photon engines exist, but they are horribly weak
will help to correct the error in the program "Motor must have a propellant set"
What's an inch?
Is this on 2x ?
my prays have been answered. maybe there is a God after all. ty for this
Now that we have liquid fuel rockets and SRBs time for rocket with boosters
I almost didn't notice your nice bow tie.
Hm...is it "rocket motor" or "rocket engine"? or neither? motor is usually electric, engine involves heat and moving parts. So, what is a rocket?
For rocket propulsion systems we typically call liquids 'engines' and solids and hybrids 'motors' as a carryover from the separate teams that developed the two technologies. Other than convention, both are acceptable.
Hello Charlie, do you speak Spanish? I mean, your name is basically Carlos García, mainly a Spanish name... so I was just curious about...
Thanks!!
You sound like Sheldon from The Big Bang Theory
Why do I feel like solid rocket fuel was over complicated for no reason after watching this?
Puedes hacer videps en español
Lo siento, pero mi español es muy mal.
hey
😎😙😎😙😙😎😎😙😙😎😙
0:54 Musk or Must?
It is pretty narrow minded to leave out sugar motors, and because you don't know about sugar and solid rocket motors, you shouldn't put them down, and you really need to learn about PVC it is the easiest to work with and just as SAFE! 👍
On the contrary, I've made several hundred sugar motors, and I can categorically state that they have a higher failure rate, worse performance, and the only injury I've ever gotten while working on rocketry was while working with sugar motors.
@@AstroCharlie I have made thousands, and I can categorically state, that you are not building them right. You sound like you are confusing "experimentation" and "learning" with use! You don't seem to know what you are doing. But, that is understandable due to your lack of experience, years, and socialization. But that is ok, you will learn.
The fact that you were injured by "your mishap" has also tainted your view of reality.
Knowledge will tell you that you always need to work within the capabilities of the materials, which we have learned long ago, but the younger boys never seem to know and always have to "relearn".
So it would be advisable if "YOU" stayed away from PVC and sugar unless you educate and learn the respect for the scientific process.
Again, it seems like you are very narrowminded in your view and are biased by "your" failure to understand the benefits and limitations of PVC and sugar.
Good luck with your "consumer enthusiast rocketry".
Dude, you are all over the place.
exactly 71000 views
I made a sugar rocket from the kind of random. I used stump remover and sugar and I did everything exactly how he made it. I was 13 years old and I bought everything with all my birthday money savings. I think the king of random just made a scam video to get views and that destroyed my hope. It didn’t work😔 I’m 18 now and I want to try to do it again. Do you know what I could’ve possibly done wrong. I did everything exactly right and it made a bunch of smoke and flame, but no force. If you have time plz watch the king of random rocket series and tell me if it is just a scam or wether I could still fulfill my childhood dream. Thanks
You need to leave your diagrams up on the screen and maybe talk a little slower when going over each of them. Keep in mind that a person is taking in new info and needs time to absorb it along with looking at entire diagram.
Most TH-cam rocket tutorials are absolute deathtraps! 'Bout 5 years ago I made some sugar motors in PVC pipe, that not only exploded often and produced little thrust, but emitted delightfully cancer-causing fumes to boot. I can see why making SRMs is banned where I live.
Candy Rocket motors are not illegal to hell are you on about. PS there is no right way and wrong way when you get the best result.
Hi Pat,
There are many regulations on potassium nitrate by the Department of Transportation. If you move the motor around on public roads you could be in violation of these regulations.
There absolutely are right ways and wrong ways. 'Right' ways produce good results repeatably and safely. 'Wrong' ways endanger your safety and the hobby.
@@AstroCharlie No sorry bro but you've been massively misinformed absolutely nowhere in the law does it say Rocket candy Rockets are legal. Those regulations you're talking about that's with all Rockets not just Rocket candy Rockets. You have an incredibly close-minded way of thinking. For you theres only one way it's done and the only way it can be done because anything else is impossible, That's you right there. I never once brought up the wrong ways to do something. I said there is never just one right way i based that on what you said earlier. If everybody thought everything they did was the only right way we would never developer and advance in technology. We'd still be in the stone age.
(I can’t not pay attention to you rolling your neck on almost every word)
HOW?! HOW ARE YOU SO DAMN CUTE! 😉😍
Umm, OpenMotor is impossible to navigate.
Cool!
1. Make a solid fuel
2. Ignite it with an electric spark
3. -Die-