Hi guys, thanks for checking out my video. Was really fun to try and take a more scientific/engineery route through this project and I’m looking forward to showing you more like this :)
You are going strong dude, don't let the frustration take you. Personally I would like to see more math and details of how you calculated/chose the dimensions, operating pressure, temperatures and what specific impulse you expect
Incredible work! The editing and visualisation is very well done, I enjoyed every minute of it. Also, I’m a fresher working on our own bipropellant liquid engine too, so your process documentation is invaluable to us. Thank you!
This is so awesome! Calculating, building, testing, flying. Setbacks along the way are part of the process. That happend to my team and me aswell. This is propper rocket science! :)
You can also use pintle nozzles to avoid detonating your reaction chamber. If you set up pintle nozzles with a spring behind them, you can make it so when the pressure inside the chamber exceeds the strength of the spring, the nozzles all close themselves. Successful failure, it did self throttle and maintain a near constant pressure, it also messed up the exhaust profile and shook the rocket apart during a 30 second static test.
Very nice video! I really love the project and your style. A question about the injector: Why are you throtteling the fuel and not the oxidizer? Because with the current desing, when you throttle down, you are shifting the combustion to the oxidizer rich side. That could - depending on your O/F Ratio - ruin your chamber because the hot oxidizer reacts with the steel.
Also, you could possibly bore out the holes on the mill with a boring head. Gives you better positional accuracy/straightness compared to the part. But probably the taper would be impossible to do then... Also glad you invested in a proper CNC lathe and don't rely on that definitely square 4 jaw chuck
Love to see the progress! And it is progress, even when things go horribly wrong. _Especially_ when things go horribly wrong. One thing (I'd want someone to tell me) is that some of the audio balance is a bit off on some of your clips. Not too major, but a little fiddling with the levels should solve it
Great work so far mate. If you don't quite get the performance you need from the injector in this open loop control method. You could try and design a closed loop system that attempts to control pressure using that pressure sensor you have installed. If the pintle wobbles a bit under the forces exerted on it, and the slope of your flow coefficient is high, you could find it difficult to control the mass flow rate in an open loop scheme. See how you get on mate and I'm looking forward to the next video.
I would make make sure the parts seal well before hot firing lol, idk how you are going to manage to have no leaks on the screw shaft but good luck, the main sections could be brazed tho I guess
Nice work there Callum, that's a cunning experiment - give it another go. Liquid-propellant rocketry is all about plumbing, and plumbing is all about fixing endless leaks! We're working on liquids now, and of course they leak like buggery. Pressure-testing the plumbing just before you use it 'in anger' catches most (but not all!) of the leaks. It's just part of the learning curve. Rick N, Aspirespace
Good lord, the man himself! I've read so many aspirespace pages written by you (or maybe just the same ones over and over!). Just wanted to say thank you for such amazing resources :) - Sincerely, a fan :)
@@robbiejames1540 Thanks Robbie, you've just made my day! I enjoy 'spreading the word' on all aspects of rocketry, so it's most gratifying to hear that people like what I write. Best, Rick Newlands.
@@Callum-Long its not anything to be sorry about, its very understandable that a project of this sort is bound to take time and we're all for it!! good luck going forwward!! we'll always be looking upto the next upload!
You should invest in a micrometer, calipers are not all that accurate. I'm in the U.S. so I'm not sure what the mm equivalent would be, but calipers are really only good for measuring accurately to +/- .001", micrometer is accurate to +/- .0001". Would make your parts more accurate and reliable.
Hello, were dit you found the pdf on 3min05 ? Im very interesting to build my own hybrid rocket, so i try to keep as much as possible information (today, i'm on solid rockets and i want to upgrade) my rockets are on ARSEF chanel on TH-cam Ps: sorry for my English, i'm french and I trying to improve my level
This is such a cool project! I would be honored to make some parts for this project if you ever want some parts made. And I wouldn't charge ya since this project is just too freaking cool
Why not just have a fixed injector and throttle the ball valve? I'd have thought that would allow a more precise injector area while maintaining throttle control.
Keep on failing! nobody learns anything when it works first time! It's a complex project with a lot of bloody hard things to figure out. It's fun to watch though (the production's getting good too, it seems like you're starting to find your style, I like it!)
![[ ออกกอง ] วัยหนุ่ม 2544 โลกหลังลูกกรง..ทัวร์กองถ่ายหนังใน "คุกของจริง" | JUSTดูIT.](http://i.ytimg.com/vi/vB--aOkZCpw/mqdefault.jpg)
Hi guys, thanks for checking out my video. Was really fun to try and take a more scientific/engineery route through this project and I’m looking forward to showing you more like this :)
Great work where is your workshop?
You are going strong dude, don't let the frustration take you. Personally I would like to see more math and details of how you calculated/chose the dimensions, operating pressure, temperatures and what specific impulse you expect
I was thinking about uploading my design codes to GitHub so if people wanted to look at them in more detail they could
@@Callum-Long Are you still planning to do it?
That is the wobbliest 4-jaw i've ever seen
Incredible work! The editing and visualisation is very well done, I enjoyed every minute of it. Also, I’m a fresher working on our own bipropellant liquid engine too, so your process documentation is invaluable to us. Thank you!
Thanks mate glad you liked it, good luck with your engine too!!
This is so awesome! Calculating, building, testing, flying. Setbacks along the way are part of the process. That happend to my team and me aswell. This is propper rocket science! :)
amazing work!! remember, this is rocket science, it's not meant to be easy. You've gotten super far already, just keep working the problem!!
Just a tip, Stop wearing rings and a watch when machining, or you may get snagged into the machine by the chips.
You can also use pintle nozzles to avoid detonating your reaction chamber. If you set up pintle nozzles with a spring behind them, you can make it so when the pressure inside the chamber exceeds the strength of the spring, the nozzles all close themselves.
Successful failure, it did self throttle and maintain a near constant pressure, it also messed up the exhaust profile and shook the rocket apart during a 30 second static test.
Keep up the good work!!! It's a shame that such well edited videos don't get the range they deserve
Very nice video! I really love the project and your style.
A question about the injector: Why are you throtteling the fuel and not the oxidizer? Because with the current desing, when you throttle down, you are shifting the combustion to the oxidizer rich side. That could - depending on your O/F Ratio - ruin your chamber because the hot oxidizer reacts with the steel.
Also, you could possibly bore out the holes on the mill with a boring head. Gives you better positional accuracy/straightness compared to the part. But probably the taper would be impossible to do then... Also glad you invested in a proper CNC lathe and don't rely on that definitely square 4 jaw chuck
Love to see the progress! And it is progress, even when things go horribly wrong. _Especially_ when things go horribly wrong.
One thing (I'd want someone to tell me) is that some of the audio balance is a bit off on some of your clips. Not too major, but a little fiddling with the levels should solve it
Rockets are difficult, you can't give up :) Currently, of all the channels, I'm looking forward to your videos the most.
Thanks mate that means a lot!!
Great work so far mate. If you don't quite get the performance you need from the injector in this open loop control method. You could try and design a closed loop system that attempts to control pressure using that pressure sensor you have installed. If the pintle wobbles a bit under the forces exerted on it, and the slope of your flow coefficient is high, you could find it difficult to control the mass flow rate in an open loop scheme.
See how you get on mate and I'm looking forward to the next video.
glad to see you back, Callum
I would make make sure the parts seal well before hot firing lol, idk how you are going to manage to have no leaks on the screw shaft but good luck, the main sections could be brazed tho I guess
Exciting work! Planning to make one as my personal project
Excited
Very cool video and I'm already looking forward to the next one
Nice work there Callum, that's a cunning experiment - give it another go.
Liquid-propellant rocketry is all about plumbing, and plumbing is all about fixing endless leaks!
We're working on liquids now, and of course they leak like buggery. Pressure-testing the plumbing just before you use it 'in anger' catches most (but not all!) of the leaks.
It's just part of the learning curve.
Rick N, Aspirespace
Good lord, the man himself! I've read so many aspirespace pages written by you (or maybe just the same ones over and over!). Just wanted to say thank you for such amazing resources :)
- Sincerely, a fan :)
@@robbiejames1540 Thanks Robbie, you've just made my day! I enjoy 'spreading the word' on all aspects of rocketry, so it's most gratifying to hear that people like what I write. Best, Rick Newlands.
been waiting on this for soo long man
me too
Sorry it took so long :/
@@Callum-Long its not anything to be sorry about, its very understandable that a project of this sort is bound to take time and we're all for it!!
good luck going forwward!! we'll always be looking upto the next upload!
subscribed! jets see more progress after school!
You should invest in a micrometer, calipers are not all that accurate. I'm in the U.S. so I'm not sure what the mm equivalent would be, but calipers are really only good for measuring accurately to +/- .001", micrometer is accurate to +/- .0001". Would make your parts more accurate and reliable.
I subscribed in the first 20 seconds
Very nice
Nicely done
Looking good man!
Hello, were dit you found the pdf on 3min05 ? Im very interesting to build my own hybrid rocket, so i try to keep as much as possible information (today, i'm on solid rockets and i want to upgrade) my rockets are on ARSEF chanel on TH-cam
Ps: sorry for my English, i'm french and I trying to improve my level
This is such a cool project! I would be honored to make some parts for this project if you ever want some parts made. And I wouldn't charge ya since this project is just too freaking cool
Can you tell me why the heck you only got 5000 subscribers? Nice video.
Edit: Spelling
Beginning of new rocket company ?? 😁
Amazing Callum....
Good Luck ❤️
The chuck on that lath is well off center
I like 12:11 :-) Great job mate
Thanks mate it was an exciting moment :)
Hi Callum your video is too late 😢
Please do Faster I am waiting for your video 👍👍 god bless you
Which application do you use? 14:57
Not bad
^^^^^^^^^^nice
Why not just have a fixed injector and throttle the ball valve? I'd have thought that would allow a more precise injector area while maintaining throttle control.
"Promosm" 😢
Keep on failing! nobody learns anything when it works first time! It's a complex project with a lot of bloody hard things to figure out.
It's fun to watch though (the production's getting good too, it seems like you're starting to find your style, I like it!)