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Hypersonic Fever! With Chris Combs and Alex Hollings - The Hermeus Podcast 18
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- Опубліковано 14 сер 2024
- Oh do we have a treat for you! We're joined by a couple hypersonic "influencers", Dr. Chris Combs of the University of Texas at San Antonio and Alex Hollings, the Editor in Chief of Sandboxx News, for a spirited, engaging, and occasionally controversial conversation about the state of hypersonics in the world today.
00:00 - Intros
03:06 - What is hypersonics? What is hype and what is reality?
08:58 - Hypersonic planes vs hypersonic weapons
13:07 - What are the most interesting problems in hypersonics?
18:50 - Airplanes are objectively cool
22:00 - Airplane development timelines
24:57 - Testing and developing complex air and spacecraft
37:43 - NASA vs SpaceX development approach
55:27 - Assessing risk and how failure breeds success
58:02 - Perceptions vs reality
01:00:15 - Scramjet, boost-glide, and ramjet hypersonic flight
01:01:42 - Highly coupled systems
01:03:43 - The hardest thing about hypersonics: people
01:10:02 - Alex Hollings on Hermeus and Defense reporting
01:14:41 - Wrap up and where to find Chris and Alex
Came from Alex channel and glad I did. Thank u for not trying to squeeze every dime you can out of the American tax payer. Yall are building this awesome machine the right way. Alex said your trying to build it with off thr shelf parts and if you have to invent somthin you do it in house with 3d printers which saves tim3 and mo ey all of which come from the tax payer. So thank you for trying your best to give a awesome product without killing the tax payers pockets.
Nerd meter off the scale. Love this kind of topic. Thank you all.
Back, sorry, parsing as I go. The entire segment on procurement, development, cost, and the infrastructure/people dedicated to the task is fascinating. Loved the example of how the F-35 sits alone on the "scale" as opposed to different explosions around tech like in the 30's, 40's, 60-80's and then dead space, before the F-35 comes along. Which brings up an entire topic on acquisition, how it was developed, and the current field of hypersonics in relation to that process around the F-35. Which, needs not to be the case for commercial aviation, thankfully. "Almost less expensive just to build the plane" - as opposed to all the testing, given the lack of facilities according to Chris, a great comment that puts it in perspective.
I worked at NASA as a network engineer... way cool experience!
Quite informative. Looking forward to more content.
Regarding faster commercial plane flight. It's simply not viable as long as the TSA remains as it is.
I lived in SF for quite awhile while my friends mostly lived in LA. That's a 1.5 hour plane flight which I'd have happily taken frequently (if cheap enough) except for the fact that there is an extra hour or so of stress and fuss getting through security and being sure you are there on time.
Until we can make plane flights as straightforward as subway trips extra speed is less valuable than just making the flight itself more comfortable.
thats coolest shit i've ever seen. Hypersonic company that has a podcast where they just nerd out? SIGN ME IN!
Very interesting, but I'm not convinced it's impossible to reduce the per unit price of hypersonic platforms until they are cheap to make at scale.
This is the same problem we've seen in many industries. The first clocks (and also semi-automatic guns were crazy expensive because they were hand crafted to exacting standards. Now we can mass produce them cheaply.
I agree that you can't do this halfway. Either you have to commit to ordering so many the per unit cost comes down or go reusable. But the former, while risky, may ultimately be the better bet. But I dunno. Just a possibility.
And TBF at this point in time where we are still demonstrating possibilities it's not yet time to try to go for the mass production.
I enjoyed this conversation, thank you for this podcast, it was a interesting insight.
Bring Part 2
With regard to any hypersonic strike aircraft (i.e. a "re-useable" weapons system, not just recon), deploying munitions at hypersonic speeds sounds like a bit of a challenge. Surely the sudden change to the airflow/drag characteristics will be challenging to both vehicles. Something going hypersonic is going to have very finely tuned (Laminar?) flows with all kinds of critical flow patterns that if disturbed will be catastrophic for drags/stresses/temperatures. Anything detaching and disturbing that complex flow is going to be very difficult to manage, for the munition and for the aircraft.
Also, presumably these will have to be externally mounted as opening bays at that speed would seem tricky, opening voids and safely transitioning an object from zero flow into hypersonic flow and through the skin/boundary layers of the aircraft. However, externally mounted munitions, starting in the hypersonic flow and outside the main aircraft's boundary layer, might be a challenge for drag and for low observability.
(I am discounting the option to slow to low speeds for deployment, that being exactly over the most dangerous air defense location)
Of course I may be talking out of my backside,... or rather I AM talking out of it, but am I wrong???
Has anybody ever (successfully) deployed a large object from a hypersonic vehicle operating in these atmospheric realms, or even studied it? Doesn't that question need to be addressed before building a hypersonic strike vehicle?
19:45 so, where’s the Hermeus Shwag? 🥳
Alex hollings is a W
Aiight, now watching. The WFH thing, I could see Alex react to that one! Also, I don't think it is dead, we switched and still have about full on 50% WFH, but I agree, Zoom/Teams etc. cannot replace face to face interaction, just like this podcast. So much more dynamic with you all seated together and going over things you love. Obviously commercial Hypersonics cater to that face to face dynamic especially in regards to global interactions and current timescales involved for that to happen. Getting to Japan, in 3+ hours vs. 13 or more hours is a game changer.
Dr. Chris Combs talks near the start about the size of wind tunnels being a problem for ground testing. Humanity has spent the last century miniaturizing industries. I know Dr. Chris knows how the forces scale with size changes. Has anyone asked him about making Scaled Tests of extremely accurate models with miniature force sensors and using accurate materials? Or, am I thinking that everything works like a FEM in a computer? Thanks for the show. Best regards, Mike
We have tunnels that have small cross sections
Dimensional analysis and scaling is common in aerospace
The problem is that even at small size, recreating a representative hypersonic environment is incredibly difficult as there are multiple similarity parameters to simultaneously satisfy (which is not easy), the energy cost is tremendous, and it the fatigue cost on the facility is tremendous as well
One is never 100% ready for anything.
I very much suspect that all of your second-guessing of SpaceX will be swiftly muted when...on the second test flight...there is little to no damage to Stage Zero and all of the objectives of the flight regime are handily met... _by only the _*_second_*_ flight test of this entirely new system._
41:57 IN RUSSIA failure can get you sent to siberia and has, just say'n
well what now is stopping you from a real test flight? You need to get this into the air.... crash, burn or fly! Pretend that Kelly Johnson is asking you that lol
Algorithm.
BTW. I wish you hadn't descended into SpaceX.
Ukrainians shot down Russian hypersonic missile using American Patriot AD system last month
It was a ballistic missile designated as hypersonic for PR purposes
Patriot and THAAD are supposed to take down ballistic missiles
Going fast for those missiles isn't a problem because the trajectory is predictable
A maneuverable hypersonic vehicle, of which the Russians do not seem to have, is more difficult and does not follow such an (relatively) easy to predict ballistic trajectory
I wonder if Alex Hollings had soreness in his arms after these speeches