Making ROCKET Engine Fuel Injectors - FINAL STEPS!
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- čas přidán 28. 06. 2024
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Copenhagen Suborbitals is the world's only crewed, crowdfunded space program. In the future, a volunteer astronaut will fly to space on our home-built rocket. We do this on our spare time, all the donations go to paying our workshop rent and buying materials. We are forever thankful to each of our supporters!
In today's episode, we'll be brazing our stainless steel, 3D printed coaxial swirl injectors for our BPM-5 liquid rocket engines. Besides that, we will guide you through our updated quality assurance measures to reduce our chances of seeing engine-rich combustion in our upcoming static fire tests.
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Music by Everyday Astronaut:
(www.everydayastronaut.com)
TIMESTAMPS:
00:00 - Intro
00:21 - Engine-Rich Exhaust
00:29 - The 1st Coaxial Swirl Injector Ready for Oven Brazing
01:37 - Fuel / LOX-rich Injector Regions
02:15 - Final Injector Preparations
02:41 - The BIG Moment - Vacuum Oven
03:29 - Upgraded and Automated Flow-mapping Process
04:30 - Engine-rich Exhaust and Trying to Avoid It
06:52 - Rundown of the Upgraded Water Flow Test Stand
09:18 - Outro - Věda a technologie
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Thank you!
That was an amazing video, I am increasingly impressed with the quality and level of detail you all are including. This seems like a really big step in rocket production. It's so cool to see you getting more and more technical with your testing and diagnostics. I look forward to seeing the finished injectors assembled together, its going to be a literal blast!
Keep up the great work 👍
@@waylontmccann Thank you for always keeping up to date with our updates! You are correct, this was a major milestone in the Spica rocket production. As with every rocket and rocket engine development process, the injector is one of the most critical and hardest points. We look forward to validating it in a static fire as soon as corona restrictions allow.
Denmark is such a good country, people there make their own rocketry! Why don't we have this in Russia?(
I would like to apply
LETS GOOOOO
Im exited to see your manned flight
Love that you use everydays astronaut music
Love the norminal reference!
Nice to see Tim Dodd's music getting used. Maybe he can come cover your launches too :-)
It'd be fun!
Love your videos
We appreciate it, thanks!
Engine rich combustion..i love you guys 😂👌🏻
This is actualy a genuinly interesting component, despite it's small size.
Personaly i also look forward to see more of the pressurizing device for the engine fuel on the testsetup.
We recently received new parts for the LN2 burner and heat exchanger, but it might not be a priority for a few more weeks.
@@CopenhagenSuborbitals I fully understand that priority, whan i wrote here i just came from re watching a live demonstration video (made by those british astronomy guys) about the injection nossles of the V2(A4) engine, it is interesting to compare the systems, (i think however the A4 engine where more to be classified as semi low pressure by modern standards, somewhere between this concept and modern type high pressure systems). I think the cluster design on the A4 engines was mainly because of the unusual construction of the oxygen injectors, later designs (developed in the US after the war) where more like this.
How the hell have you only got 45k subs! Going to start recommending you on the space X channels.
That's great support, thank you!
Haha engine rich combustion... Superb.
I support you!
Fly safe! You guys need to say hello to Scott Manley.
We keep in touch on Twitter.
Det er altid en god dag når copenhagen suborbitals uploader :)
I am really your biggest fan. Godspeed Copenhagen Suborbitals!!👍👍😀😀👍👍
Thank you!
Oh boy, i'm so excited for the first flight! Good luck!
Omg and here the song of the gods everyday astronaut moon dance theme
Engine rich combustion - x) Nice!!
Things also running norminal at 3:24.
Can't wait for the first static fire!!!
What a time to live
Always a great day when Copenhagen Suborbitals posts a video. :) Thank you for a really interesting update.
Awesome stuff! Can’t wait for the hot fire tests!
Norminal. You got my subscription from that alone.
No regrets.
Thank you and welcome aboard!
thank you for your video. It is amazing. I am from Ethiopia.
The mixture ratio control you folks are doing on the two injector zones is a great idea. In my experience this allows you to dial up the overall engine O/F ratio closer to optimal (assuming you are cooling limited) resulting in increased performance.
I can't wait to see this static fire!
Thank you! We are looking forward to a static fire bonanza as soon as the corona restrictions are softened in Denmark.
Yasssss we have been blessed with another video
We have been blessed with another viewer!
Glæder mig til at se en motortest!
Vi er næsten klar!
Does the automatic test characterise the output distribution and mixing of the propellants. If a particular nozzle creates an oxygen rich zone to its left, the placement of that nozzle within the engine may become significant to engine integrity. This may require two different liquids in the test setup, such as water and ethanol.
If CS reached their goals.. Will they turn into copenhaguen "orbital" lol (bc i want really to see that)
For now we can only take up one goal at a time. But who wouldn't like to build even bigger rockets if their smaller rocket succeeds. ;)
@@CopenhagenSuborbitals I would love for you to get the point where you have paying commercial customers, so you won't all have to work for free like a bunch of rocket slaves.
Great video. Always feel like I learn something when I watch these
Very glad to hear that, thank you!
I get to learn with you guys!
It's so exciting seeing a *real* space program being developed on CZcams that's building *real* flight hardware.
_shoots accusatory look at ARCASpace_
best CZcams Channel ever
Great explain .. I am watching from KSA .
That is so wholesome
Love the norminal reference
Love it!
Hey Copenhagen Suborbitals,
I absolutely love your videos! Everytime you uploaded I just wish your videos was longer so we could really get good insight into the engineering that is going on. That is personally what I really enjoy. At the same time I know you are limited in time already so it might just be wishful thinking 😅
The best of luck anyway, look forward to the next video!
os projetos desenvolvidos por vocês, é algo impressionante e maravilhoso, acompanho vocês, sou do estado de Minas Gerais, Brasil.
Could you use an injector from a high output diesel or a methanol injector used in a 5000hp dragster engine?
Can you make a video on how your tvc on the rockets work
Please do more general videos about the projekt
Excelente explicación 🐱
Hi, I got a question (not really a question) about the swirl injectors, you get in the Agricultural circles that uses nozzles that makes evaporative cooling, the injectors works under very high pressure +- 1000 Psi and only opens when the desired pressure has been reached, they are made out of Stainless and the sizes starts from big, 1mm to 0.01mm, the mist that it emits are super fine, it look like any airosol maybe even finer and we mix into the water nutrition that covers every single bit of the plants, even on the underside of leaves. As an experiment I used ordinary petrol and compressed it in the final stage before being forced through the nozzles, 0.02mm with no Oxygen added before compression and the flame that it emitted from a single nozzle was enormous. The nozzles can be set to emit in a few ways, the conical shape of the airosol emitted can be increased in diameter or focused on a long straight point. When you take the nozzles apart, there are 3 main parts, a entry washer,, a wormlike spiral (auger) that mixes the fluid and then an exit nozzle that is designed to open at spec, pressure. Now I know I am getting screamed at right now, but as a boat owner I pay for pump for my boat $1000 were I can buy exactly the same pump from an irrigation shop for $25.
Good job 👏 keep it on 😁
Just watched your video ,my question is why use water as your injector flow test when the fuel and oxidiser give different value due to density values and pressure The water will flow differently to oxygen and the fuel .
Great job for test best swirl injector
I hope test pintle type injector
❤️ from Kerala 🇮🇳
when we will see spica rocket launch??
When it's ready : )
I love your stuff you guys are just the right kind of crazy. How long do you guys think it will take to test the Hundreds of Swerll-nozzles on the Spica?
Nice
I too hope it goes norminal.
Hello! Love the videos. I'm and ME/EE engineer myself and over the years have played with trying to build a small liquid fuel rocket engine. I've never gotten past the injector plate! :) Like you, I've got 304 SS as a base. Was looking at doing traditional impinging flow injection. One thing was that I was going to braze copper to the stainless steel very similar to how the Saturn F1 injector was made. Just getting into the brazing. I was wondering if I could ask a couple questions:
1. What solder paste are you using
2. What is the purpose of doing it in a vacuum? I need to correct this. I understand to prevent oxidation. Did you consider an inert gas environment like argon?
3. What is your vacuum chamber made or? SS?
Do all of swirl injector elements rotate in the same direction or is there a pattern of clockwise and counter clockwise elements?
3 mins on for a 9min video - 11 likes :) 6 comments (well 7 now)
I believe the flight is soon
What are you guys gonna do after Spica launches? Orbital?
Not decided yet, but imagine what you can do if you slam large tanks on 4 times 100kN engines and add a second stage .... not even the sky is the limit.
Hey guys, just a tiny question out of curiosity:
The injectors are flow tested with h2o @ ~5 Bar on both sides. In operation they will see O2@90 bars on one side and ethanol with "way less than 90 bar" on the other, right? Isnt the difference in pressure a consideration in flow testing? Or am I guessing wrong and in operation both sides will see the same pressure too? (Or maybe i mixed up my fuel and you are not using ethanol after all?)
Would appreciate an answer :)
LOX and ethanol will have approximately same pressure on the "cold" side of the injector. That is how it must work. That pressure will be in the 18-25 bar range. The injector it self adds loss in pressure and chamber pressure will be in the range 15-20 bar. However initial test will not have to be at that pressure. You can qualify the flow characteristics using water and lower pressure to get a fix. The rest is mathematics and fluid dynamics and admittedly a model for how to calculate things taking into account the difference in among other things viscosity. This is the science part of rocket science.
After seeing your speed I am afraid that Denmark will reach the space ( manned) before my country
i have bin stutying rockets for 4 yers and i am 11 i think you shoud test the space condishins ferst be for sending humans to orbit or up or down maby sending a sell billt small satlite ferst
Denmark is such a good country, people there make their own rocketry! Why don't we have this in Russia?(
Which laws exactly do prevent yourself from publishing information about the BPM100 engine and other parts of rockets?
Copenhagen Suborbitals is Kerbal Space Program in real life lmao
what about igniters for BMP100 engine
While we sometimes experiment with gas based igniters, the most reliable method ready available is the firework on a wooden stick www.popularmechanics.com/space/rockets/a19966/russia-actually-lights-it-rockets-with-a-giant-match/
I never hear anyone say norminal out in the wild
the thumbnail is phobia for some peoples
I am newly joined
Sir how do u drill so much small holes in the injectors , I am also making a injector plate but no one agrees to make a hole which is 0.5 mm in diameter , any guides into this will really help
Also one more thing how do u segregate oxidizer and fuel inside the injector?
@@thecros1076 I don’t think you know what you’re doing
@@iain3713 lmao
@@iain3713 I really know what I am doing 😊... thanks for the reply btw
@@thecros1076 the fuel is coming from the top and the oxidizer is coming from the side by holes in the side of the injector i think
Do these rockets land propulsively or should I just go ahead and leave?
Let's keep it that that they come back down and are reusable, and you stay at least until another unpaid group of volunteers that work in their spare time and share every nuance of rocket engineering with you build a liquid-fueled, suborbital rocket capable of carrying a person to space on a crowdfunded budget that's less than 5% of NASA's coffee budget (no offense to NASA). Deal?
Do you know oh much pressure these little electro valves can handle 7:39 because I need a safe way to light my small liquid rocket engine at a sufficient distance but my fuel is at 300 psi and my oxygen at 400psi
What are the propellants?
@@machy8515 I use ethanol and Gox
@@tristanlongangue5671 I would assume that ignition with 2 pieces of wire and cotton wouldn’t be bad. Or you can use a sparkler and put it in the throat while it’s lit.
@@tristanlongangue5671 if it’s big enough I would recommend using the cotton and wires, it safer Because then you don’t have to approach a fully loaded test stand with a flame and then run back and hope that the sparkler is still burning.
@@machy8515 yeah or matches and wire but cotton is a very good idea since i just have to change the cotton and its less problem than matches and for safety also. And i will buy a radio commanded relay for the valve so i will connect the ingniter on it
Bagian tenga agak bulat kayak balon
That's usually classified information, dunno why your channel isn't been taken down yet
I wonder what the legalities are for this project, your basically making a crewed ballistic missile in a shed. You'd think somebody would have stepped in already and ruined it but they seem to be doing just fine.
We have a close collaboration with authorities. The Nexø class rockets were borderline cases at the time. Spica will not be, so it requires close collaborations with authorities. But remember executing sea based rocket launches to high altitude is not something you do on a sunday with nothing better to do. Besides all the rocket stuff, an amazing amount of paperwork precedes a launch. This includes large amount of reports for security and risk assessment and calculations. There are no short cuts.
Very nice work, but for the love of all that is holy, please normalize your audio peaks, that music is painfully loud
Noted, thank you for the feedback.
@@CopenhagenSuborbitals I aim for -6db for dialogue and around-10db for music under, but your mileage may vary
Can U guys make longer episodes with more content and some payoff ... Id love to know and see more but I feel like there no payoff in the videos.... U guys do great work but it doesn't come across with as much info as id like
What do you mean with payoff?
Like seeing the outcome of the injectors that were set into the engine part... Like seeing through something in the episode...
I know your a rocket company and not a video one and stuff takes time, but I just feel like it would be better to watch if we saw the outcome of that.... Just small little thing I know, but it would feel like the episode had a payoff to the the start of the episode......
Maybe I'm just OCD... But I also like seeing the engineering and stuff being built.... I used to watch allot of car building and renovation shows and like seeing the process of building these projects...
Just a constructive thought cause this project is really interesting and I want to see more
I can't speak for others I know, but personally I'd be happy to wait an estra day or 2 to see that part finished in this episode. But I also don't know your workload and schedule... So I'm just wishfully thinking :p
@@schmerzdj5719 We are not a Company. We are a crowdfunded group of volunteers doing this in our spare time. Your are warching it close to real time, but due to corona things take a little extra time at the moment, so we publish videos as soon as we can, to let you follow our development together with us
@@schmerzdj5719... so the payoff will come in a later upload