Scout E - Engineering Cut
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0:00 - Intro
1:11 - Full Vehicle CAD
6:10 - Basic Flight Profile
9:55 - Flight Simulation
22:40 - Vehicle Measurements
31:21 - Thrust Vector Control Mount
56:04 - Modeling Actuator Dynamics
59:43 - Landing Legs
1:20:00 - Airframe Construction
1:27:56 - Emergency Parachutes
1:35:42 - Avionics / Wiring
1:42:28 - Software In The Loop Testing
1:44:44 - Flight Software
2:15:04 - Conclusion

Scout E Flight 1 -

Scout E Flight 2 -

AVA Flight Computer -

Second channel, mostly for KSP:

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Ciência e tecnologia

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20 Out 2021



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Comentários 368
Stochastic Signal
Stochastic Signal 2 meses atrás
Oh baby! 2+ hours of Icarus Thiccarus being a gamer! When you said "I don't know if any of this stuff is interesting to people, but it's interesting to me" I was just thinking how fascinating stuff you're doing is, Joe. Thanks for sharing this with us as always.
Ryan Porter
Ryan Porter 2 meses atrás
I have ZERO intent on ever building a rocket, I've been following this just cause like that he's covering the project and sharing his journey moving from technical to business to financial, to project manager . It's just interesting to listen to a dude that thinks and then executes.
Jan 2 meses atrás
As an engineer, this was absolutely one of the most interesting videos I saw on the youtube, and gosh did this 2+ hours fly by like 5 minutes. Fantastic job Joe, kudos
RandomUser311 2 meses atrás
Rest assured, the parachute would have saved the day right on the first flight after removal. :) At least that's how it always goes when I throw something out.
vicroc4 2 meses atrás
Yeah, that's what I was thinking. He forgot Murphy's Law: "Anything that can go wrong, will." Which really means, make it so that when it inevitably fails, it won't fail in a way that injures people - and preferably, doesn't destroy the vehicle as well.
Luigi Cruz
Luigi Cruz 2 meses atrás
I legit read "engineering cult". And I was ok with it.
Gomeo 2 meses atrás
@The Talent here let me get you a funnel to increase throughput and bandwidth
The Talent
The Talent 2 meses atrás
@Gomeo Me: *guzzles*
Gomeo 2 meses atrás
Have you tried some of our kool-aide? Here have some it’s free on the house I insist
Re Run
Re Run 2 meses atrás
Sign me up!
The Talent
The Talent 2 meses atrás
I’m in!
Cooper E.
Cooper E. 2 meses atrás
I should totally be doing my physics assignment right now, but I will just tell my mother I was watching something much more applicable to real life physics.
Shreyansh Singh
Shreyansh Singh 2 meses atrás
this is insane!!!! the stuff you post is already on a next level and this Engineering Cut video would help a lottttt of pepl building something similar. Great Stuff Joe!!!! (again)
metalworker3 2 meses atrás
I have been watching this all afternoon. 1. Flippin amazing. 2. This is an incredible amount of hardware and software development. Loved every second of this. Can not believe how much you’ve put into this, and have to show for it. You have no reason to doubt your engineering aptitude. Go Joe!
dire saint
dire saint 2 meses atrás
"My code has advanced beyond me." Joe Barnard October 21, 2021. yeah, this is where Skynet begins.
Andrei Farcas
Andrei Farcas 2 meses atrás
His code has transcended every state of being and is now omnipotent. All hail Joey B’s code.
Gijs Begthel
Gijs Begthel 2 meses atrás
And that's why I learned to use dogtags in my code
Larock1234 2 meses atrás
We need more of this!!! Thanks for your honesty and sharing your code even if it is not always polished. I have a question though... Why do you not simulate on your PC? Why bother and simulate on the Arduino? Wouldn't it be much easier and faster to simulate on the PC? Maybe use PlatformIO to run the Arduino code on your PC
Larock1234 2 meses atrás
@PaulsMagicVideos Always depends on how much time you wanna spend :-D What would you suggest as a simulator? Gazebo?
PaulsMagicVideos 2 meses atrás
@Larock1234 you can get more fancy and have a 3d rendering of the simulation as well ;)
Larock1234 2 meses atrás I wanted to say that there is actually the possibility to test/run Arduino code on the native environment (your PC). Check out the unit testing examples of PlatformIO (especially the calculator example), it's actually pretty easy. You would then write dedicated C++ code that runs on your PC, but that uses the functions you wrote in your project. This could be used to simluate and test your code at the same time (doing some test-driven dev could save same time anyway ;-) ). But I see that it could be problematic because some of the hardware-oriented libraries might not work unless you use mock-ups. Anyway, great work that you are doing! It definitely makes sense the way you do it, but I just wanted to throw in this possibility as an additional idea ;-) 2 meses atrás
Thanks a bunch! One of the reasons I went for running the sim on the Arduino is that I could more easily port code over to the actual flight codebase - since the sim and flight code are both in the same language, it makes things a little faster to switch between them. I am also much more familiar with Arduino/C++ as a language than I am with Python, or something that might, from an outside perspective, make more sense to sim with.
Systems Planet
Systems Planet 2 meses atrás
Important: do not fly with needles sticking out but spikes are fine 😀
PanhandleJake 2 meses atrás
This is a PERFECT use of BRvid ! Your sharing information that, while based on model rockets, is of actual societal value - solid engineering principles that may pique the interest of other yet-to-be innovators. If you have produced this much independently in a relatively short period, I can barely imagine what you will accomplish in a few more years! AND we as subscribers can help you grow your channel so that you are further enabled to continue exploring the world of physics and rocketry. By the way - Congress just required NASA to hire a second contractor for the new Moon lander - care to try? Might be easier to land on the Moon..........
Alex Saunders
Alex Saunders 2 meses atrás
These videos are the most interesting, would love to see more. The amazing launch videos are always great to watch, but the engineering is what is so interesting.
Indeterminate Design
Indeterminate Design 2 meses atrás
Love it, engineering ASMR for me. I totally understand the over modeling in CAD, I can't tell you how many hours I wasted coming up with a perfect design in cad only to find out some part of it didn't work in the real world.
Joe Gibes
Joe Gibes Mês atrás
Yeah JB makes an excellent point about your design starting on the whiteboard as a rough sketch or list, rather than CAD first. In my engineering career I've found that to be incredibly valuable!! Maybe CAD is nice for "sketching" shapes or concepts if you're fast or need to see how something interacts in 3D - but you should always get your ideas and requirements down first. A pencil sketch of a cross section showing key dimensions is EVERYTHING for good engineering! It also helps for communicating ideas. Always show your idea visually - words are too vague unless you and the other person are deeply keyed in to the design. And even then, a quick 2d sketch on paper or in PowerPoint is huge for understanding. A rough sketch is better than a CAD model that's wrong, haha.
BozoTheJew 2 meses atrás
Always get super existed for when you upload a new video. keep up the amazing work :)
Kimball Goss
Kimball Goss 2 meses atrás
Man I know this was probably a lot of work…but I thinks it’s my favorite video so far. There’s just so much data, explanation, and video footage, this video is a treasure trove. Would love to see more vids like this in the future.
Last Bastion Labs
Last Bastion Labs 2 meses atrás
“Engineering cut”. Great idea. I alway struggle with the balance between to much detail and entertainment. An engineering cut would help fill the gap. Also, you are doing amazing work and the CAD is not wasted time because you are documenting your design. You are building a rocket, it’s always cool.
Bakamoichigei 2 meses atrás
"'Engineering Cut' is a term I made up just now, because I realized that 'Nerd Porn' wasn't particularly BRvid-friendly." -- The real story. 😏
Oleg Davydov
Oleg Davydov 2 meses atrás
46:25 - Joe is inventing a wheel :) Seriously, it was a great video! I liked the description of technical challenges and solutions, as well as the style. And I now want more stuff in genre "developer reacts to the code he wrote year ago" ;)
Renato Luís
Renato Luís 2 meses atrás
Thank you for sharing this with us!
Cassius 2 meses atrás
1:23:10 YES, It's absolutely worth it. I love hearing all these small little details and intricacies of your project. It's really cool to hear exactly what you were doing and why, even on the tiny little details.
EvilBunnyCompany 2 meses atrás
Thank you so much for the Engineering Cut. Love watching your content and its really inspiring to me and many others i think. Gonna get an arduino soon with a bunch of sensors and gonna try to build a water rocket first to track the data and play around :)
Matisec 2 meses atrás
What have you learned in terms of feasibility of propulsive landing using solid fuel propulsion?
olsonspeed 2 meses atrás
Pencil, paper and a large eraser are my first step tools, the first design seldom makes it through to prototype phase.
Energy 2 meses atrás
Great job Joe , I have been watching you videos since you had 200 subscribers , and I saw this channel grow little by little , and I would like if you made your Thrust vectoring code and software Free to download and use , so thousands of other people could also build thrust vectoring rockets
pistonsoup 2 meses atrás
Thank you Joe, sincerely from another joe. I am a controls student and this content makes me feel not alone in the struggle to simplify and control systems that are ludacrisly complicated haha
Stefan Turcu
Stefan Turcu 2 meses atrás
Thank you Joe for the video. Awesome to see the full engineering process behind
A Kids Perspective
A Kids Perspective 2 meses atrás
This was incredibly interesting to watch to see all the plans put together👍
King R
King R Mês atrás
The most interesting video i have watched this year, I'm a first year comp eng and this really helped me understand better the different usage of loop/if functions in the c++ file. Overall great presentation!!!
james kirk
james kirk 2 meses atrás
I olny started watching this channel a few months ago, and this video is one of my favorites, because It goes deep into the "geek' territory, and I love listening to people talk passionately about what they have devoted much time too and are deeply interested in. Hearing about all of the testing and design, troubleshooting and engineering you put into what you do is really awsome. Thank you, Sir!
Mike Montana
Mike Montana 2 meses atrás
Excellent levels of detail - answered many of the questions I've been thinking while watching your series.
Rose Hayes
Rose Hayes 2 meses atrás
I love your channel and the way you talk about your engineering, especially the why. One thing that's been extraordinary is where you talk about when you've been wrong and should have listened to your team. It's super non-toxic, especially given the level of stress you've spoken about. More clips showing your interactions with your team would be great (assuming they're comfortable with being on camera).
vaderdudenator1 2 meses atrás
It both helped me pass the time and was very interesting. Thanks for putting this together!
Lucid Moses
Lucid Moses 2 meses atrás
After so many years it's quite rare to see an indentation style I've never seen before.
michael warlick
michael warlick 2 meses atrás
What a great project ! Have you considered placing spikes on the landing feet? If you are certain that you will land on something resilient spikes would dissipate some of the force and fasten the feet down with that power.
waqar waqar
waqar waqar 2 meses atrás
I love your videos, can u make a video on how u taught yourself rocket science and the books u used to teach yourself. Keep up the amazing work man your a big motivator !!
Alex K.
Alex K. 2 meses atrás
Oh man thanks for taking the time! This format is appreciated whenever you can!
Quertz 2 meses atrás
The code part was actually really interesting! Great to know that it's mostly just "bread and butter" Arduino Code and not some crazy magic I could not understand at all!
Vedant Momaya
Vedant Momaya 2 meses atrás
Such an awesome video for engineering aspirants 😊😊
ZwurlTech 2 meses atrás
39:33 the 3D-printed part needs more mass at the end tip to overcome the friction
enque01 2 meses atrás
I've so far watched 2 minutes of the video and I already have to comment --> "Engineering Cut" is such a great idea, and I'm amazed that it is largely absent from the maker youtubers. It really is a needed type of video for makers such as ourselves. First of all we just need the information dump, a neat place to store all the data for future reference, while also perhaps being of interest to somebody. Secondly, we'd like to drop "engineering cuts" because the creation process IS MESSY and you often don't quite know what a thing is until long after you've made it. Perhaps this content will be revisited and re-edited into some more easily digestible form, or perhaps it won't! We don't know yet at this point! So great idea! Let's move on to the rest of the video now :)
Evan Cook Music
Evan Cook Music 2 meses atrás
Thank you! This definitely helps with my project.
Full Flow Aerospace
Full Flow Aerospace 2 meses atrás
This is cool! Nice job.
Jason Pfeilsticker
Jason Pfeilsticker 2 meses atrás
I have not seen any of your other videos and I enjoyed this. I have dabbled in model rockets a while ago and work on researching fuel cells now but I still enjoy personal projects and certainly projects at work. This is a fantastic project. subbed and followed.
LiterallyKey 2 meses atrás
I'm a freshman engineering student trying to get into rocketry and this is super helpful. I am sure it will save me a lot of trouble and already gave me ideas on how to do older projects better. Pretty amazing stuff.
Joseph Rossman
Joseph Rossman 2 meses atrás
This is exactly what I wish the youtube maker community would do more often. It seems like the more popular they get the less actual engineering content and how-to there is. I've come to youtube countless times looking to see how people like yourself *actually made it*. In your case, it's great because if you inspire someone to get involved in rocketry they have a place to look. A good example of this is Richard Nakka's website, he doesn't just show his idea's he practically teaches you rocket science! Keep on keeping on man, this is great!
MrGatlin98 2 meses atrás
Santiago E. Quintana
Santiago E. Quintana 2 meses atrás
Hi Joe! Grat work and grat video, I really like this format! For rocketeers like me who are just getting started in the flight computers is really helpful to learn a bit about flight software (that is, what I can understand about it), I really appreciate that you showed some of your own work. By the way, I have a question for either you or anyone that can answer: as you are using a state machine, why don't you run the code for the states using a switch case? Is there an objective reason or is it just more comfortable for you?
Santiago E. Quintana
Santiago E. Quintana 2 meses atrás
​@Евгени Георгиев It is running different pieces of code according to the number that a variable has.
Евгени Георгиев
what is a state machine?
Flood Gates
Flood Gates 2 meses atrás
I’m going to neglect all my responsibilities and watch the whole thing 😂
Akhil Athawale
Akhil Athawale 2 meses atrás
At this point I've forgotten all about assignments
Fox25_FPV 2 meses atrás
did the same thing
Nik Gourg
Nik Gourg 2 meses atrás
Kevin 2 meses atrás
Lets do it togeather. The dishes can wait
sis bro
sis bro 2 meses atrás
hey joe, like for the crush cores you could use modelling clay which absorbs energy better than aalluminium foil
Full Flow Aerospace
Full Flow Aerospace 2 meses atrás
I saw AVA and now I can’t stop staring into its soul
Full Flow Aerospace
Full Flow Aerospace 2 meses atrás
@Srgtjyn both
Srgtjyn 2 meses atrás
Are you staring into its soul? Or is it staring into yours?
FieryFeather 2 meses atrás
Love the video, love that painting even more 🤩
Meet Pitale
Meet Pitale 2 meses atrás
its so fascinating that this small amateur rocket has so much complexity into it ( 25 % of the terms went over my head )
Michael Fuchs
Michael Fuchs 2 meses atrás
Hi Joe. I must say that I really liked watching this video and others of yours, where you share your thoughts, ideas and designs. My fingers (and brain leftovers) start to itch! 😀🤓 Watching your videos has made me think about one thing though: Your TVC (thrust vector control) is very nicely designed and seems to work well and is well built form what I can see but have you tried or at least evaluated using vanes in the exhaust plume instead of gimbaling your motor mount? 🤔 Several ballistic missiles are using / was using this system as you already might know. Early birds were the V2 and the Redstone - taken from the top of my head. I'm speculating that the motor mount with motor eject system would be easier to build (and lighter) without the gimbal and the vanes themselves will move your CG further down in the landing configuration (Z axis). The vanes ablation surfaces could be made from cheap copper and made easily replaceable to keep your running and manufacturing costs low and the manufacturing process easy while graphite would be more durable of course - but might be a bitch to produce and machine in a hobby environment. I know you're using a reaction wheel for roll control of your rocket and that it probably is much more responsive and easier to control, but maybe vanes could eliminate the need for it and therefore saving you a great deal of mass, making for a much lower CG and kinetic mass screwing with your landing attempts? 🤔 You will also get a throttling option 'for free' but how effective and responsive it really is I'm not sure. Just a few spontaneous thoughts of mine and I'm curious if you went through these as well, which I guess you did, and what your conclusion was. I'm not into amateur rockets (yet anyway ) but I have 'a few hours' behind me with rocket engineering in my life. Both small-ish and a bit more large-ish. But my part was more on the electronics side of things - like payload, telemetry and guidance. But I've been part of a R&D team so I've done a bit of CAD / CAM of experimental flight hardware as well. Google 'Black Brant Scare 95' and you'll get an idea about what I've been tinkering with - among other similar 'toys'. 🚀 💥 🌎 🇳🇴 Cheers!
Roger Garrett
Roger Garrett 2 meses atrás
Joe, I never cease to be amazed at your intelligence. Totally amazing. One suggestion (from a career software engineer) . . . as you're writing code you should add comments throughout explaining what it is that each section of code is doing or accomplishing or is intended to perform. Your code might never be read by anyone else (the prime reason for including comments, so that OTHERS can more easily understand what you wrote and why you wrote it) but it may well be read by YOU at some later date, just as you did for this video, and just reading the code itself often isn't enough to trigger your memory as to what it's supposed to do or what your reasoning was for writing it. Commenting your code is also a good way to "white board" your ideas, just as you suggest doing before going to a CAD program to flesh out your ideas for hardware. Writing the comments as if you're explaining what you're doing to someone else often helps to organize and clarify your own ideas about what you're doing and how you're doing it.
Full Flow Aerospace
Full Flow Aerospace 2 meses atrás
YES this is extremely important
Gomeo 2 meses atrás
No imposter syndrome here needed. You’re a full blown Engineers my dude. But it’s humbling to see your process and very entertaining to see how real and human you are. Makes genius engineers relatable on the whole - a category I firmly believe you’re progressing towards with this work.
Snookers Mês atrás
The section of your shock absorbers before the hole is actually a damper where the force is proportional to speed. The second section where air begins to compress is a spring, but air springs have a super-linear force response as opposed to the linear response most springs have. They also return back to their original position (as long as they don't leak). Honestly, the current setup is super neat in that you manage to have both in a small, simple package.
Giovanny Alvarez Sánchez
Hey! following your project from Colombia; about the trust vector test on raining conditios, It's a good idea to include the humidity as a variable on the landing time calculations, because that obviously affects the burning reaction on the motor, not just because the amount of water on the reaction also because the air density changes, I've been thinking about the time sinc for landing, I wonder if you can make the controlled trust jet not only for the vector direction (as you did) but the force, a variable nozzle or deflector, some compress air that you can control, because that will be less dependent of the motor quality or wheather conditions.
Deniz 2 meses atrás
So much knowledge in one video
kicka55 2 meses atrás
Code Documentation: F I think the error in your control system is you don't really control the rocket differentially. It shouldn't matter how much thrust the motor generates to the control system. A control system usually compares where the rocket is to where it should be then makes changes until both align.
Nathaniel Kencke
Nathaniel Kencke 2 meses atrás
Now this is the kind of content I like to see!
NS 2 meses atrás
This is gold 👌🏼. Thank you!
chenax 2 meses atrás
keep it up! you are great
Tommaso Dall'Ora
Tommaso Dall'Ora 2 meses atrás
Two words: Absolutly amazing
Alexander Burgers
Alexander Burgers Mês atrás
Something that occurred to me regarding the landing height and landing legs situation, lithobraking? the rocket stops in mid-air anywhere from 0.25 to 1m height, and then freefalls, so the energy curve is slanted pretty steeply one way. If you adjusted the firing of the motor so it stops, say, half a meter lower, the energy curve is kind of more like a parabola, either it impacts the ground at low speed comparable to a short drop height, or it stops in mid-air closer to the ground, the minimum and maximum energy dissipation should be much closer together, making the energy absorbtion by the landing legs more consistent? Just a thought.
Clive Bagley
Clive Bagley 2 meses atrás
Jolly well done old fruit. That's kept me well entertained this evening. Well worth the effort, so thank you.
ody vinty*
ody vinty* 2 meses atrás
8:25 man that is so brilliant. totally blew my mind
Tera Mês atrás
you should've put the ejection pin at 45 angle leveraging two servos for ejection instead of one and put the pins closest to the friction point as possible for highest leverage.
Wayno Complaino
Wayno Complaino 2 meses atrás
Landing legs: when the piston is above the air hole it’s a pure damper, once it is past the hole it becomes an undamped air spring. You could really ‘tune’ the landing gear with piston diameter, stroke length, hole position in the stroke and hole size. I think it’s a good cheap way to prototype and test.
compwiz101 2 meses atrás
Not to mention that you could add more holes at different positions to give it variable damping rate during travel!
Steven Lischer
Steven Lischer 2 meses atrás
Some of the those syringes with rubber plungers have fairly high friction with the sidewall so it might be damped a little past the hole, but yeah not nearly enough to approach critical damping. I'd like to see experiments with open-cell rubber/latex foams used as a damping agents to get critical damping at ~.3 meter height so the system is slightly overdamped above that
DAzZuLK 2 meses atrás
Once a saw a video of a cuadracopter drone (and coding) controlled by and Arduino UNO. It worked, but requiered low level code on assembler on some parts (written inside the IDE along with regular C++). For me it was a nice way to start & learn code on ASM.
MrGatlin98 2 meses atrás
You may take a look at model shock absorbers for RC cars (Like Traxxas). They are roughly the right size for the landing legs and do exactly what you are describing in a more consistent and controlled manner.
Joe Gibes
Joe Gibes Mês atrás
Yeah, there are tiny oil dampers for RC cars that might be good for this. Maybe they're too heavy but it's worth a shot. I also feel like the syringe dampers could get different rebound damping with a one-way flap over a hole... the bypass hole for variable damping is already a nice idea. Although they're working as air springs at the end of travel so that's tricky.
FF's SWGOH 2 meses atrás
I have one question: Why not use an FPGA instead of a microcontroller? Wouldn't it be able to parallelize calculations more effectively?
Sonderax 2 meses atrás
Do you think the next iteration will use a basic Gridfin for more stability. Same release mechanism but less mass needed high up?
Henrik Damjanovic
Henrik Damjanovic 2 meses atrás
Very nice, keep going! Support from Croatia.
Adam Churchley
Adam Churchley Mês atrás
You're the person Elon Musk should have been! A true inventor and engineering pioneer who lives and breaths the intrinsic complexities of engineering and design , undoubtable consumed and enthralled by the challenges in pursuit of you're endeavors. The drive to conquer and perfect ones imagination and asperations is seldom represented in such uncompromising elegance, something like minded people can relate and console with. I take solace in you're success in demonstrating to all of us that the opportunity to imagine and create something spectacular enriching the lives of us all. Keep up the good work!
Roger Garrett
Roger Garrett 2 meses atrás
Firing in the rain. The difference in thrust when firing the motor in the rain could be due to a higher atmospheric pressure when it's raining. It's not so much the rain itself by the moisture content of the air.
Elliot Duncan
Elliot Duncan 2 meses atrás
how do you possibly teach yourself all this like drag coefficient estimation, how to plot out and create simulations of these rockets, how to use CAD, how to write a Controller and get avionics to give you the data you want? this all seems insane to me
Quertz 2 meses atrás
Would it be possible to mount some of the weights inside the body in a dampened, sliding way? So instead of the legs taking up the energy during landing, some mass inside the body dampens the fall and reduces the bounce
Michael Fuchs
Michael Fuchs 2 meses atrás
I was thinking the same. Especially the reaction wheel assembly.
A-Tech 2 meses atrás
Hi Joe, I would really like to get into making rockets, it looks really fun but possibly expensive, would you recommend using a thrust vectored electric ducted fan to start or just go straight into the rocket motors? thanks
A-Tech 2 meses atrás
@autistic and ashamed thanks
autistic and ashamed
autistic and ashamed 2 meses atrás
Going straight into the motors is very simple, as long as they're commercial motors. Especially compared to a thrust vectored EDF. I know I'm not Joe Barnard, but my name is still Joe.
Matt Thompson
Matt Thompson Mês atrás
I wish I could just work on the code part with infinite amount of scouts to fuck around with. Have you ever thought of building a simulator and letting machine learning sort this bad boy out ? You know your inputs and the fitness could be how well it sticks to desired flight profile and of course survives :D
Joe Gibes
Joe Gibes Mês atrás
Yeah it seems like using ML to optimize gains throughout the flight would be pretty useful. It's basically running a bunch of simulations and varying inputs to see what meets your target best, right? Ofc it's only as useful as your simulation, but that can be refined with actual data. Maybe the next step past that is ML comparing the sim to actual data and having better predictions? Maybe using ML to optimize the control algorithm itself? Idk but there's a lot of power in this tool. Learning where to apply it is the kicker.
Zach Jackson
Zach Jackson 2 meses atrás
1:25:06 that excitement dance is fantastic
Kedar Nimbargi
Kedar Nimbargi 2 meses atrás
Curious to know if these ideas would help. Would placing the computer upside down help? So the reaction wheel is sitting lower than current and CG would move down by a bit? I don't know if this affects reaction wheel function. I liked the crush core idea, cheap and simple improvement over it could be drilling a through hole in landing pads with the fancy logo on them and placing a dowel halfway. So on impact dowel moves up absorbing energy. And what an amazing way to show how to "engineer" a product. Loved it.
Andrew Kroll
Andrew Kroll Mês atrás
Rain difference, that's easy to explain. Lower air pressure. That's why engine bells are different for sea level v.s. up higher/space. Smaller thrust is going to show a larger effect. Model it.
Adam Rak
Adam Rak 2 meses atrás
- The gas absorbs some of the energy and turns it into thermal energy. You would expect the reverse when it expands, but due to much smaller forces and friction losses, it will not be able to give you back the energy (which is kind of the point here). - The best way to absorb the energy would be to burst when the pressure is at its peak. That is very hard to design consistently, but you can get close enough if you drill a very small hole. That would make the gas bouncy in short time scales, but it would take the maximal kinetic energy out of the system.
metalworker3 2 meses atrás
Love the Engineering Cut mantra!
Nathaniel Kencke
Nathaniel Kencke 2 meses atrás
You don't have to chop off the needle. You can just unscrew it from the syringe.
Akshay Raj
Akshay Raj 2 meses atrás
Bruhhh this is so interesting, You should post more these, Your community loved this
Sridhar Ξrror
Sridhar Ξrror 2 meses atrás
Weight + Gravity + air + not working ignitor + Rocket body damage = Headache 😅 But it's gives you a good lesson
Webseite 2 meses atrás
Well done!
Pronto 2 meses atrás
"You can spend as long as you want in CAD and it will still fly the same." That's what happens when you mess around with hardware: that's why I'm sticking to software....
Nic Nacs GTV
Nic Nacs GTV 2 meses atrás
at 51:28 that water is affecting the reaction. likely water droplets are coming in and affecting the engine.
Msjoq 2 meses atrás
Was it maybe just a lot cooler for the test fire in the rain? I know of rocket candy motors that are really dependent on the initial temperature of the fuel, which was only discovered after one motor test had the motors sitting in the sunshine for a while
Kasim Bilcevic
Kasim Bilcevic Mês atrás
Is it me, or Joe really looks like Elon's little brother? Great video, can't wait to see the new ones. Thumbs up!
Гончар Данило
I am not really sure, but it looks like your reaction wheel would not work as it is supposed to, because the rotor of dc motor and gear will also act as a reaction wheel, but off-centered, with a different moment of inertia, and spinning In the opposite direction (obviously) I also understand that because it is PID controlled it shouldn't make much of a difference in control of z rotation, but it probably adds extra tilt in x or y. and I think it could affect trajectory after landing motor burnout. correct me if i`m wrong and also sorry for my English, I`m from Ukraine :)
Full Flow Aerospace
Full Flow Aerospace 2 meses atrás
Your English is great! Also he has used his wheel oh another rocket before this called scout, he also used it on his shreeek rocket. So I’m pretty sure he worried it all out :)
Litespark Mês atrás
1:35 Ah yes, the thrust vector control mount. I totally know a good thrust vector control mount from a bad one. Every good project needs a thrust vector control mount. 👀👀 Shut up, I totally know what it is.
Niel Wagensommer
Niel Wagensommer 2 meses atrás
My completely non-scientific idea about your lower performance in rain: Higher atmospheric density reduces your isp, both from the cold and the water in the air.
Thunder 2 meses atrás
Actually, rain usually comes with lower atmospheric pressures, so i doubt this could be the case
Reme G.
Reme G. 2 meses atrás
Hey BPS. Space I was wondering are you going to stick with solid motors or will you experiment with liquid or hybrid engines in the future. Just curious.
Full Flow Aerospace
Full Flow Aerospace 2 meses atrás
He does want to use liquid motors in the future, he just doesn’t want to build it.
Awakened Peasant; Wall Enthusiast
Unfortunately rocket motors are regulated, even more so the larger they are. Good luck legally operating a liqued fueled rocket yourself, it's possible!
Mat does a thing
Mat does a thing 2 meses atrás
Can you throttle a hybrid rocket motor by controlling oxidizer flow or is it too likely to catch fire? Could do staging with the first stage being a solid motor....
farmerZen 2 meses atrás
rocket science available to everyone. Well done sir
Solid Rocks
Solid Rocks 26 dias atrás
Compared with a slippery floor the feet have the much higher grip on the grass. I would sugest a sliding horizontal foot of 5-8cm that can do the sliding. Pretending its that slippery floor. Maybe you can do something with it. Anyway great content. Keep it up.
vicroc4 2 meses atrás
You're going to regret removing the parachute, Joe. Remember Murphy's Law: "Anything that can go wrong, will." You're leaving a door wide open for gremlins to crawl through, and I only pray it doesn't end in that heavy-ass rocket slamming into someone at near terminal velocity.
Captain Krist
Captain Krist 2 meses atrás
Less thrust is normal for rocket motors when operating in cold or rain. Heat up your motors for better performance.
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