I feel like Felipe was holding back and just wanted to go crazy with information. Great interview, wish I could see more including the solar shield. Thank you Destin for providing us with the opportunity to watch these interviews.
Experiencing these interviews has been wonderful. I'm 48 yrs old and I feel like a kid who just discovered there's a candy shop within reach of my house. So excited. More of this please. 2/3
I love it so much at the start where he goes "Im so used to dealing with media that has no idea what this is" this guy is amazing. great interview Destin.
Wow, this has literally rendered me thoughtless and speechless for a few minutes! Ever since I was a kid and my dad told me about the sun, one of my first questions was "Can I touch the sun?". And now the Parker probe will actuallybe the first ever human/man-made object to actually get closest to the sun and send us crucial info to learn so much more about the sun and the way it behaves. I mean hats -off guys, Big Kudos to the scientists, engineers and support staff for their endless perseverance and thirst for knowledge that has enabled this whole mission. And lastly thanks a million to you, Destin and your friend Trent for driving all the way and helping us see, understand, learn and appreciate these awesome intellectual wonders! I'm truly getting "Smarter" Every Day!
Thank you, for making these videos. I thoroughly enjoy the "just right" amount of scientific explanation you and others share in your videos. I love it when you let them know you're not a layman's terms kind of guy and you're about to geek out. This was just enough information to process, without being left overwhelmed and/or confused. I believe a majority of your audience has a firm enough grasp on science and physics to comprehend your videos, without needing degrees to feel "in the loop". Thank you again, Destin, for all that you do and your exemplary presentation and explanation. Keep up the amazing work!
This was a great interview, taking him off script with real questions was awesome. I feel like it excited Felipe, and made him a bit nervous. Incredible job, Destin and Felipe.
Incredible stuff. I loved what he said in the beginning that we weren't able to do this because our TPS tech wasn't good enough, but now it is, really cutting edge of science here. Thank you so much for doing these interviews Destin. And I really appreciate that we have someone like Parker and all of the ingenious people who worked on the solar probe. My goodness, there are so many smart and fantastic solutions (sapphire beads!?) . Love being alive in this exciting day and age. And also love ULA and what they are doing, incredibly talented.
Very cool. As someone who has worked developing scientific instruments, this stuff is fascinating, and it's interesting to see what is different and how much is common between something that's going to circle the sun and the more modest stuff I got to work on. I loved it when he was talking about the noise floor - it felt like "home" because that struggle to keep the signal as far above the noise floor (and the noise floor as low as possible) is universal.
Super cool interview! I love getting all of these technical details for this amazing mission. The only complaint I have about the video is that it stopped, I'd have preferred if it went on forever (or at least for hours). ;)
Thanks for this Dustin. I enjoyed your video on the main channel, but hearing the full interview is always interesting (although you did a good job cutting it up for the main video).
Like many people have said, I love these longer-form interviews where you drill down past the surface layer questions and interact with the scientists on a deeper level. You can tell how excited they become when they see you speak their language with such enthusiasm. As a viewer with no scientific background or knowledge to speak of, I still feel like I learn more from these interviews where I have to Google terms than from the videos that target my own level of knowledge. I appreciate you sharing these conversations and not being afraid to geek out. :D
I was thinking about the same question about calibrating magnetometer baseline to account for the EM sources within the craft itself. So glad that came up in the interview.
When I visit JSC in TX I'm going to ask why Destin hasn't been selected for an astronaut yet. I didn't realize you has a second channel, so excited to learn more.
Can I just take a sec and say THANK YOU DESTIN!!!!!!!!!! I knew nothing about the Parker solar probe untill you put out these videos and these have been so cool to watch and learn with you I love all the work you put into these. It's really cool as a fellow aspiring engineer to see other peoples ah ha moments and geek out of mechanical marvels like this. Again thanks these interviews have captured my imagination and appreciation for space!
I'm studying systems engineering and I've always had a hard time explaining to people what I'm actually learning to do, I think I might just point them to this video from now on!
Currently 1.6k likes, and *no* dislikes. Is that a UA-cam best? Either way, it speaks volumes about how good both Destin and Felipe conduct this interview. GJ. :)
This was a great interview. Explained so much in a way I could understand! Thanks for posting these full interviews Destin. It makes the solar probe so much more approachable (not literally of course... lol)
I'm gratefull you do those videos man... It's always good stuff... Can't wait to see you Space youtubers on ISS as "tourists" in some years... I bet it will happen sooner than what we believe :)
Very interesting interview! Felipe seems like a cool guy :) I'd be interested how much monoprop is left after the last gravity assist. Also...for some reason I never knew there's a guy on every team that handles "putting all the pieces together". I always thought that there's one "master" design and you just follow it. Very cool stuff.
I really liked how Felipe was able to break down the basic science behind the various parts of the probe. It never even occurred to me that one could use spinning wheels to maintain a spacecraft's orientation (or change it, for that matter), I found that to be really cool. I do wonder why they didn't centerline the center of gravity with the center of pressure. I'm sure there's a reason, but it seems like it might have been much easier to keep the probe aligned if they had. Anyway, great video.
Idjles Erle How is the pressure different as you get closer except to be more intense and/or have a higher amplitude? (I don't know, but if you know I would appreciate an explanation.) As for the optimization, well, seeing as how this was made by humans, who are fallible, with time and money constraints, I don't think that I can be sure that it was thoroughly optimized, which is why I wondered about it in the first place. Like I said, there is a reason, but it could be anything, from the materials wouldn't balance properly, or the battery casing wouldn't fit that way, or we could have centerlined it but it would have taken another year, to we didn't realize it hadn't been centerlined. Heck, one explanation is that the water and hydrogen that are being carried won't stay aligned as they are expended. I am just interested in what the actual reason is.
The pressure is generally dropping off by 1/r² as the Faraday Cup guy mentioned but it is not smooth. If everything was perfectly smooth they wouldn't need to go there, but the Corona is a boiling, seething place and they are going to measure this variation. This thing will also be hit "in the face" with coronal mass ejections and it is going incredibly fast to where it is really hot. Even the Kepler Space Telescope that was going "slow" in the cold of space and was well balanced ran out of fuel after many years of momentum dumping was affected by the solar pressure. These guys will be very efficient with their 82 kg of hydrogen. I imagine random magnetic fields will also create minor torques at different times. You can be completely certain that this probe was perfectly balanced - human fallibility plays no role here. My only question is why they didn't put a second Faraday Cup on the other side to be redundant and balance mechanically, but i am sure they worked that all the way through and the 82kg of hydrogen was the best option. Hundreds of people work on these machines for decades and balance mistakes are not made.
Idjles Erle Even with the Faraday Cup you could still adjust centerline and center of mass with center of pressure to be balanced. It is done all the time with aircraft. The Kepler Space Telescope was not intended to face the solar wind head on with a heat shield, and in order for it to accomplish its missions it would need to get hit with the solar wind (and gravity) on different parts of its surface as it rotated to take pictures of different parts of the universe. As for the Corona boiling being the reason we need to go there, that doesn't make any sense, nor is that among the stated reasons for the mission. I also don't understand how human error and fallibility won't play a role. If humans had a hand in something, there is the chance of error. Even the Kepler Space Telescope had reaction wheel failures and also failures to repair those wheels, resulting in a shortened mission life. Saying that hundreds of people working on a machine does not automatically mean that no mistakes will be made, in fact, as more people work on a specific project the odds of an error being made increase. The people who work at NASA are just people, with the ability to overlook things, make math errors, and just assume that someone else is taking care of something. I'm not saying that this is happening or has happened, I just wondered about a particular design and was hoping for someone who had inside information to address it. (You are not wrong about having a second Faraday Cup, though. I wondered the same thing. I also wondered why they didn't just integrate it with the heat shield, though I can think of a number of reasons why they wouldn't.)
Super cool interviews, thanks Dustin! One question maybe somebody can answer. When they talk about heat being pulled away by the water and then circulated to the radiator, how does the radiator transfer energy to dump the heat? I was under the impression that since there are so few particles in space it is really difficult to transfer heat/energy without anything to transfer it to. Thanks!
I liked especially how they talked about the death of the probe like it was an actual human who has a desease and whose death is determined but still has to set in
Great interview but I realy wanted to see the shield. If you film it show it. Thats why Im here on your second channel. I would not mind sitting for three hours listening to all that was said in thoughts interviews. You are doing a GREAT JOB!
See, I'm wondering if Felipe would consider letting me use the TPS as a windshield screen here in Phoenix, AZ since it's almost as hot as the sun itself. But seriously, why wouldn't it keep a car, roof, etc. cooler? Great stuff.
Okay, if I got it right, there are magnetic motors turning wheels to adjust the orientation, but the magnetometer is far from them, and the probe knows when it's running the motors, so it's not a problem. Right?
A burning question: why isn't the surface of the heat shield mirror-like rather than "just" white? I thought that a mirror would reflect the energy better. Was it because a mirror would get damaged by the solar wind, or maybe a white surface works better for infrared/UV wavelengths than an optical mirror would? Thanks!
Why not change the shape of the shield to balance the spacecraft solar wind with the center of mass? Or! Why not rotate the spacecraft so that the solar wind force will exactly match the attitude control needed to keep the spacecraft shield aligned? This is what we did for the command module as it was returning to earth. During reentry, the offset center of mass visa vi the heat shield was used to keep the attitude of the command module into the reentry friction. Because of the offset center of mass, rotating the command module allowed it to be flown with the heat shield forward.
I'm wondering - why they didnt' made the shield in such form, as spacex dragon or apollo capsules used to? And then make the shield adjustable so you can move the shield little bit, to match center of mass with center of presure. That would be kind of automatically adjustable, without much less demand from reaction wheel and fuel requirments... But otherwise really cool interview.
We've been using the same reaction wheels for a very long time. There is a known failure in a lot of space crafts with them. I'm concerned being that close to the Sun they will fail even faster. Have any precautions been taken to protect the bearings?
The main failure point was not a design flaw in the bearing or manufacture but a failure of materials and an unexpected electrical arcing across the steel balls. The steal balls (or pins/rollers for that matter) and i think raceways have been replaced with non conductive ceramics this should negate the electrical arcing problem and to my knowledge has more or less stopped the failure of these bearings.
He said the center of pressure wasn't aligned with the center of mass. I'm quite intrigued as to why that is the case. Is it something that is quite unavoidable? Was it due to a certain scientific payload? Was it due to some other reason?
Is the TPS designed for a solar flare? I mean if one gets close to the solar probe would it be enough to heat it up to a critical point where some instruments get damaged or could the increased pressure change its orbit?
So I was wondering, why do they not design the spacecraft to work like a dart? As in, use the solar radiation to align the spacecraft itself? You could drop an 82 kg tank + 4 reaction wheels if that could work.
This was my question too. It seems a well placed, small weight, or a slight realignment of the TPS could center the C.G. to the C.P.. Perhaps the extra weight of a slightly larger shield or of balancing weights would grater than the weight of the fuel requited for momentum dumps?
Other than it’s just hard to be perfect, there is one instrument that has to be exposed on one side and that throws things off because there isn’t a matching one on the other side.
I dont believe you need thrusters for a momentum dump, it could be all electronic, ive been thinking about reaction wheel systems since around 2015 when i learned roman cart wheels left distinct directional signatures on ancient streets, that day i learned there was a distinct signature to angular momentum, thought about how to capture it, and funnel it, and i dont believe you need propellant, in a reactor wheels system, it could be all electric and you could use more than just solar arrays to power the system, also with correct suspension you may be able to make a hover craft on earth, but you could definitely use it to move in the weightless environment of space.
but why was it difficult to avoid creating the solar torque? Is it just a matter of aligning the center of pressure and center of mass? Is it more than a simple change of the shape of the TPS?
the center of mass is in a different plane than the center of pressure. The slightest change in pressure causes a slight torque which increases the distance from the center of mass causing more torque etc etc. You can't be perfect due to differing pressures as well so adjustments are always required.
+Smarter Every Day 2 How should I go about figuring out which type of engineering to pursue? I like pretty much everything that moves, and I like knowing the exact reason why something happens, or how something works. This is why I think engineering is a good fit for me, but how do I know which type? If you or anyone could offer some insight, I would be so grateful. Also, I am a high school senior and am about to start taking physics.
after the 7 year mission, when they know they're going to run out, they really should do a viking funeral before the equipment just overheats and dies.
I think of it as _shinning a heat light into the void of space._ Thermal radiation is emitted as electromagnetic (infrared) radiation via the radiators. Energy in, energy out. I'm assuming that the solar arrays also reflect much of this thermal radiation before it has a chance to soak in. (?) I still have much to learn myself.
b1aflatoxin i get the physics of it, i just wanted to see it, i want to see how a radiator optimized for pure radiation rather than convection works. I know it’ll be black since it has the highest emissivity, but what else? The fins can’t be parallel since they’d radiate towards each other, so is it a black, corrugated panel with each fold at 90° to the other?
11 cm depth of shield...1300 degrees to 300 degrees.... so if 1000 degree difference / 11cm shield = 90.909 degrees reduction in heat per cm of shield thickness.... I wonder if there is a thickness that gets the heat to 0 ( taking the heat reduction as like constant it could be 14.3cm?) ...or is there a point where the thickness will do nothing and the heat will stay the same....
Can't believe the solution to cool down a spaceship we're dropping into the fkg sun is: a small jug of water. Felipe is cool for taking the time to do this. Maybe he needed the distraction from the insane amount of nervousness most of us would feel when your project is strapped on a rocket with the countdown going. Still.
6:07 Anyone know why the force is at a moment from the center of gravity? is it because of the propellant tank mass changes, so the center of gravity changes? why can't the shield be designed in a shape that it auto balance the probe using the force produced by the solar wind? (ie. when it turns, more force will be applied on that side to push back) It's counterintuitive to me how they spend so much time designing the craft, but the solar wind will always push the probe out of aliment. maybe the force is small and not a big concern?
I wanted to see the sample of the shield. Great interview.
Me too
Yea, what about the sample of the shield?
Here's a good demo of it at the time stamp 5m 30s, but the whole video is good. ua-cam.com/video/Zc4jy_9Wpew/v-deo.htmlm29s
maybe he is making a special video in ASMR cuddling with that piece of shield. i hope.
I would have been appreciative to have seen the shield parts too. I've been so curious about it.
I feel like Felipe was holding back and just wanted to go crazy with information. Great interview, wish I could see more including the solar shield. Thank you Destin for providing us with the opportunity to watch these interviews.
Also, how old is Felipe???
He looks so young! It's really awesome to see someone as young as... he looks?, to be involved in such an amazing mission.
He got his BS in 2014, so probably mid 20s. That is super impressive.
He is 26
"26" Really? that's impressive!
honestly makes me feel sad (but motivated), that i will only start my studies in my mid 20's/
but good on him!
Major hat tip to him, and to the wise souls that invested their time in him. I'm 44 and never finished my B.S. This is motivating.
Experiencing these interviews has been wonderful. I'm 48 yrs old and I feel like a kid who just discovered there's a candy shop within reach of my house. So excited. More of this please. 2/3
Im all about the hardware so this was hella interesting. I bet each piece of the Probe has someone that could talk for hours about it
If not for real life time constraints I'd love to listen to all of those hours form all of those people as well. This is super amazing!
I love it so much at the start where he goes "Im so used to dealing with media that has no idea what this is" this guy is amazing. great interview Destin.
I'm so happy right now. These interviews are so cool.
Wow, this has literally rendered me thoughtless and speechless for a few minutes! Ever since I was a kid and my dad told me about the sun, one of my first questions was "Can I touch the sun?". And now the Parker probe will actuallybe the first ever human/man-made object to actually get closest to the sun and send us crucial info to learn so much more about the sun and the way it behaves. I mean hats -off guys, Big Kudos to the scientists, engineers and support staff for their endless perseverance and thirst for knowledge that has enabled this whole mission. And lastly thanks a million to you, Destin and your friend Trent for driving all the way and helping us see, understand, learn and appreciate these awesome intellectual wonders! I'm truly getting "Smarter" Every Day!
Thank you, for making these videos. I thoroughly enjoy the "just right" amount of scientific explanation you and others share in your videos. I love it when you let them know you're not a layman's terms kind of guy and you're about to geek out. This was just enough information to process, without being left overwhelmed and/or confused. I believe a majority of your audience has a firm enough grasp on science and physics to comprehend your videos, without needing degrees to feel "in the loop". Thank you again, Destin, for all that you do and your exemplary presentation and explanation. Keep up the amazing work!
Robert Trejo it really is remarkable how he is able to put just enough complexity and information in the videos.
thanks Dustin ...this guy is on point...how awesome is his job....smart people rock..
Dusten you better upload ALL the recording with felipe or we'll riot.
This was a great interview, taking him off script with real questions was awesome. I feel like it excited Felipe, and made him a bit nervous. Incredible job, Destin and Felipe.
This is SO much better than the "Smarter Every Day" post. Thanks
thank you for highlighting the science and the engineers of this probe
Incredible stuff. I loved what he said in the beginning that we weren't able to do this because our TPS tech wasn't good enough, but now it is, really cutting edge of science here. Thank you so much for doing these interviews Destin. And I really appreciate that we have someone like Parker and all of the ingenious people who worked on the solar probe. My goodness, there are so many smart and fantastic solutions (sapphire beads!?) . Love being alive in this exciting day and age. And also love ULA and what they are doing, incredibly talented.
I'm gonna need to see your TPS reports.
Were we not allowed to see the shield?
Very cool. As someone who has worked developing scientific instruments, this stuff is fascinating, and it's interesting to see what is different and how much is common between something that's going to circle the sun and the more modest stuff I got to work on. I loved it when he was talking about the noise floor - it felt like "home" because that struggle to keep the signal as far above the noise floor (and the noise floor as low as possible) is universal.
Super cool interview! I love getting all of these technical details for this amazing mission.
The only complaint I have about the video is that it stopped, I'd have preferred if it went on forever (or at least for hours). ;)
Btw, you should have brought your model to the interview so you could point at it when talking about the different components and parts. :)
I don't think the model had been created (Aug 20) when this interview occurred (Aug 11?).
Felipe is awesome. Congratulations. Saludos desde Colombia.
What a great guy!!!! I can't get enough from these interviews. In a good way! Thank ur thank u and thank u!
Thanks Destin for these interviews, these people are all really inspiring
I think there was a tear in his eye when Felipe described the demise of the craft.
Thanks for this Dustin. I enjoyed your video on the main channel, but hearing the full interview is always interesting (although you did a good job cutting it up for the main video).
Fantastic interviews Destin! Thank you for all of these.
Very good interview. Thank you and good night.
Like many people have said, I love these longer-form interviews where you drill down past the surface layer questions and interact with the scientists on a deeper level. You can tell how excited they become when they see you speak their language with such enthusiasm. As a viewer with no scientific background or knowledge to speak of, I still feel like I learn more from these interviews where I have to Google terms than from the videos that target my own level of knowledge. I appreciate you sharing these conversations and not being afraid to geek out. :D
I love the videos on this channel. They're so good. I'm surprised they don't get more views!
I was thinking about the same question about calibrating magnetometer baseline to account for the EM sources within the craft itself. So glad that came up in the interview.
Awesome video! I would love to see more in depth interviews with engineers and scientist discussing the technical details.
When I visit JSC in TX I'm going to ask why Destin hasn't been selected for an astronaut yet. I didn't realize you has a second channel, so excited to learn more.
Can I just take a sec and say THANK YOU DESTIN!!!!!!!!!! I knew nothing about the Parker solar probe untill you put out these videos and these have been so cool to watch and learn with you I love all the work you put into these. It's really cool as a fellow aspiring engineer to see other peoples ah ha moments and geek out of mechanical marvels like this. Again thanks these interviews have captured my imagination and appreciation for space!
Fascinating interview. Thanks for posting!
This must be the most amazing space probe I ever heard of. I believe not even Star Trek had one...
Huge bow for Felipe Ruiz!
I'm studying systems engineering and I've always had a hard time explaining to people what I'm actually learning to do, I think I might just point them to this video from now on!
Hey Destin, I really loved these few interviews! They were great! Thanks for filming them, keen to see more of this stuff
Currently 1.6k likes, and *no* dislikes.
Is that a UA-cam best?
Either way, it speaks volumes about how good both Destin and Felipe conduct this interview.
GJ. :)
Never seen a video with 1.5k likes and ZERO dislikes! So much awesomeness
great interview
This was a great interview. Explained so much in a way I could understand! Thanks for posting these full interviews Destin. It makes the solar probe so much more approachable (not literally of course... lol)
Great stuff Destin Thankyou
Great interview, such a great guy
amazing interview, thanks
I'm gratefull you do those videos man... It's always good stuff... Can't wait to see you Space youtubers on ISS as "tourists" in some years... I bet it will happen sooner than what we believe :)
Stellar interview!!!!! ;)
You ask the best questions, thanks guys.
So cool! Does the TPS expand on the sun side as it heats to 1300ºc?
Dude I love these interviews!
Today I learned about Torque Rods as used in spacecraft orientation, Very cool.
Very interesting interview! Felipe seems like a cool guy :)
I'd be interested how much monoprop is left after the last gravity assist.
Also...for some reason I never knew there's a guy on every team that handles "putting all the pieces together". I always thought that there's one "master" design and you just follow it. Very cool stuff.
watching this while still reading Seveneves sure give lots of perspectives of the condition of space
I really liked how Felipe was able to break down the basic science behind the various parts of the probe. It never even occurred to me that one could use spinning wheels to maintain a spacecraft's orientation (or change it, for that matter), I found that to be really cool. I do wonder why they didn't centerline the center of gravity with the center of pressure. I'm sure there's a reason, but it seems like it might have been much easier to keep the probe aligned if they had. Anyway, great video.
Nym Alous the pressure is different and different distances from the sun and different weather states. You can be sure they thoroughly optimized this!
Idjles Erle How is the pressure different as you get closer except to be more intense and/or have a higher amplitude? (I don't know, but if you know I would appreciate an explanation.) As for the optimization, well, seeing as how this was made by humans, who are fallible, with time and money constraints, I don't think that I can be sure that it was thoroughly optimized, which is why I wondered about it in the first place. Like I said, there is a reason, but it could be anything, from the materials wouldn't balance properly, or the battery casing wouldn't fit that way, or we could have centerlined it but it would have taken another year, to we didn't realize it hadn't been centerlined. Heck, one explanation is that the water and hydrogen that are being carried won't stay aligned as they are expended. I am just interested in what the actual reason is.
Nym Alous very interesting question. I think the expenditure of the water and hydrogen may be the reason, as it is not a constant rate of expenditure
The pressure is generally dropping off by 1/r² as the Faraday Cup guy mentioned but it is not smooth. If everything was perfectly smooth they wouldn't need to go there, but the Corona is a boiling, seething place and they are going to measure this variation. This thing will also be hit "in the face" with coronal mass ejections and it is going incredibly fast to where it is really hot. Even the Kepler Space Telescope that was going "slow" in the cold of space and was well balanced ran out of fuel after many years of momentum dumping was affected by the solar pressure. These guys will be very efficient with their 82 kg of hydrogen. I imagine random magnetic fields will also create minor torques at different times.
You can be completely certain that this probe was perfectly balanced - human fallibility plays no role here.
My only question is why they didn't put a second Faraday Cup on the other side to be redundant and balance mechanically, but i am sure they worked that all the way through and the 82kg of hydrogen was the best option.
Hundreds of people work on these machines for decades and balance mistakes are not made.
Idjles Erle Even with the Faraday Cup you could still adjust centerline and center of mass with center of pressure to be balanced. It is done all the time with aircraft. The Kepler Space Telescope was not intended to face the solar wind head on with a heat shield, and in order for it to accomplish its missions it would need to get hit with the solar wind (and gravity) on different parts of its surface as it rotated to take pictures of different parts of the universe.
As for the Corona boiling being the reason we need to go there, that doesn't make any sense, nor is that among the stated reasons for the mission.
I also don't understand how human error and fallibility won't play a role. If humans had a hand in something, there is the chance of error. Even the Kepler Space Telescope had reaction wheel failures and also failures to repair those wheels, resulting in a shortened mission life. Saying that hundreds of people working on a machine does not automatically mean that no mistakes will be made, in fact, as more people work on a specific project the odds of an error being made increase.
The people who work at NASA are just people, with the ability to overlook things, make math errors, and just assume that someone else is taking care of something. I'm not saying that this is happening or has happened, I just wondered about a particular design and was hoping for someone who had inside information to address it.
(You are not wrong about having a second Faraday Cup, though. I wondered the same thing. I also wondered why they didn't just integrate it with the heat shield, though I can think of a number of reasons why they wouldn't.)
Hey Destin, great stuff! Please share the heat shield footage if you have it! Regardless, great stuff.
Latinos representing. Excelente trabajo hermano.
Great interview and excellent information. Could not understand why Hydrogen tank is required on probe....
He has my dream job. I'm a junior mechanical engineer at Clemson, and one day I hope to be in the same line of work as him!
Super cool interviews, thanks Dustin! One question maybe somebody can answer.
When they talk about heat being pulled away by the water and then circulated to the radiator, how does the radiator transfer energy to dump the heat? I was under the impression that since there are so few particles in space it is really difficult to transfer heat/energy without anything to transfer it to.
Thanks!
Thanks-very interesting, so cool 😎
I liked especially how they talked about the death of the probe like it was an actual human who has a desease and whose death is determined but still has to set in
More!!
Great interview but I realy wanted to see the shield. If you film it show it. Thats why Im here on your second channel. I would not mind sitting for three hours listening to all that was said in thoughts interviews. You are doing a GREAT JOB!
See, I'm wondering if Felipe would consider letting me use the TPS as a windshield screen here in Phoenix, AZ since it's almost as hot as the sun itself. But seriously, why wouldn't it keep a car, roof, etc. cooler? Great stuff.
Im so glad that I was born in the 90's
Too cool for words.....
Did you get to shoot the carbon foam?
Okay, if I got it right, there are magnetic motors turning wheels to adjust the orientation, but the magnetometer is far from them, and the probe knows when it's running the motors, so it's not a problem. Right?
I love this!
They should stick some marshmallows on the back rods. This way if the probe spins too much they get to have the most badass marshmallow BBQ!
I hope you’ll show the TCM sample in another video!
A burning question: why isn't the surface of the heat shield mirror-like rather than "just" white? I thought that a mirror would reflect the energy better. Was it because a mirror would get damaged by the solar wind, or maybe a white surface works better for infrared/UV wavelengths than an optical mirror would? Thanks!
Why not change the shape of the shield to balance the spacecraft solar wind with the center of mass? Or! Why not rotate the spacecraft so that the solar wind force will exactly match the attitude control needed to keep the spacecraft shield aligned? This is what we did for the command module as it was returning to earth. During reentry, the offset center of mass visa vi the heat shield was used to keep the attitude of the command module into the reentry friction. Because of the offset center of mass, rotating the command module allowed it to be flown with the heat shield forward.
I'm from Brazil, thank god he's using metric, most videos I have no idea how much is anything :D
I'm wondering - why they didnt' made the shield in such form, as spacex dragon or apollo capsules used to? And then make the shield adjustable so you can move the shield little bit, to match center of mass with center of presure. That would be kind of automatically adjustable, without much less demand from reaction wheel and fuel requirments... But otherwise really cool interview.
We've been using the same reaction wheels for a very long time. There is a known failure in a lot of space crafts with them. I'm concerned being that close to the Sun they will fail even faster. Have any precautions been taken to protect the bearings?
The main failure point was not a design flaw in the bearing or manufacture but a failure of materials and an unexpected electrical arcing across the steel balls. The steal balls (or pins/rollers for that matter) and i think raceways have been replaced with non conductive ceramics this should negate the electrical arcing problem and to my knowledge has more or less stopped the failure of these bearings.
The science is fascinating. All above my head. All my dumb brain can think of during the interview is did you get to see any TPS Reports?
Wow, 1k likes, 0 dislikes. That's a first ever. Nice!
please adjust the focus! 2:26
you didn't touch that offered piece of shield isolator! what are you thinking!
He said the center of pressure wasn't aligned with the center of mass. I'm quite intrigued as to why that is the case. Is it something that is quite unavoidable? Was it due to a certain scientific payload? Was it due to some other reason?
So many good people like Destin in the world.
That give me hope for mankind.
Is the TPS designed for a solar flare? I mean if one gets close to the solar probe would it be enough to heat it up to a critical point where some instruments get damaged or could the increased pressure change its orbit?
You should watch the interview with Dr. Tony Case if you haven't already.
Rhyme Bito it sounded like he said in the main video that it could handle a CME fine, right?
right to the face
Why not spin-stabilize before running out of fuel?
So I was wondering, why do they not design the spacecraft to work like a dart? As in, use the solar radiation to align the spacecraft itself? You could drop an 82 kg tank + 4 reaction wheels if that could work.
So why is the center of pressure off-axis(or off the center of gravity or however you'd say that)?
This was my question too. It seems a well placed, small weight, or a slight realignment of the TPS could center the C.G. to the C.P.. Perhaps the extra weight of a slightly larger shield or of balancing weights would grater than the weight of the fuel requited for momentum dumps?
It might just be because it can't be infinitely precise in construction. Any small deviation causes this torque.
Watch the other interview video with Tony Case. It addressees why it's off-axis
In the comments, Tony Case said they tried to align the cop and cog.
Other than it’s just hard to be perfect, there is one instrument that has to be exposed on one side and that throws things off because there isn’t a matching one on the other side.
hope the reaction wheels have ceramic bearings
I dont believe you need thrusters for a momentum dump, it could be all electronic, ive been thinking about reaction wheel systems since around 2015 when i learned roman cart wheels left distinct directional signatures on ancient streets, that day i learned there was a distinct signature to angular momentum, thought about how to capture it, and funnel it, and i dont believe you need propellant, in a reactor wheels system, it could be all electric and you could use more than just solar arrays to power the system, also with correct suspension you may be able to make a hover craft on earth, but you could definitely use it to move in the weightless environment of space.
You didn't show us the panel!
the probe has times it's close, and time it's far, from the sun, right?
couldn't it spin 360 degrees in the opposite direction to "reset" the wheels?
but why was it difficult to avoid creating the solar torque? Is it just a matter of aligning the center of pressure and center of mass? Is it more than a simple change of the shape of the TPS?
the center of mass is in a different plane than the center of pressure. The slightest change in pressure causes a slight torque which increases the distance from the center of mass causing more torque etc etc. You can't be perfect due to differing pressures as well so adjustments are always required.
If you have such a dramatic thermal gradient, why not use that to power the craft instead of sticking PV's into the danger zone?
+Smarter Every Day 2
How should I go about figuring out which type of engineering to pursue? I like pretty much everything that moves, and I like knowing the exact reason why something happens, or how something works. This is why I think engineering is a good fit for me, but how do I know which type? If you or anyone could offer some insight, I would be so grateful. Also, I am a high school senior and am about to start taking physics.
How old are reaction wheels?
Holy cow, how old is Felipe?
after the 7 year mission, when they know they're going to run out, they really should do a viking funeral before the equipment just overheats and dies.
i feel sympathy for Felipe and it will do. not deeper
Felipe is total babe.
Hi, Dustin. What's happening? We need to talk about your TPS reports.........
I have so many questions about how they dump all that heat into the vacuum... Like what do the radiators look like?
I think of it as _shinning a heat light into the void of space._ Thermal radiation is emitted as electromagnetic (infrared) radiation via the radiators. Energy in, energy out.
I'm assuming that the solar arrays also reflect much of this thermal radiation before it has a chance to soak in. (?) I still have much to learn myself.
b1aflatoxin i get the physics of it, i just wanted to see it, i want to see how a radiator optimized for pure radiation rather than convection works. I know it’ll be black since it has the highest emissivity, but what else? The fins can’t be parallel since they’d radiate towards each other, so is it a black, corrugated panel with each fold at 90° to the other?
11 cm depth of shield...1300 degrees to 300 degrees.... so if 1000 degree difference / 11cm shield = 90.909 degrees reduction in heat per cm of shield thickness.... I wonder if there is a thickness that gets the heat to 0 ( taking the heat reduction as like constant it could be 14.3cm?) ...or is there a point where the thickness will do nothing and the heat will stay the same....
Did you get to see/touch/feel the sample?!?! That's missing in my life!
Can't believe the solution to cool down a spaceship we're dropping into the fkg sun is: a small jug of water.
Felipe is cool for taking the time to do this.
Maybe he needed the distraction from the insane amount of nervousness most of us would feel when your project is strapped on a rocket with the countdown going.
Still.
6:07
Anyone know why the force is at a moment from the center of gravity? is it because of the propellant tank mass changes, so the center of gravity changes?
why can't the shield be designed in a shape that it auto balance the probe using the force produced by the solar wind? (ie. when it turns, more force will be applied on that side to push back)
It's counterintuitive to me how they spend so much time designing the craft, but the solar wind will always push the probe out of aliment. maybe the force is small and not a big concern?