It’s November which means we’re getting into GRAD SCHOOL APPLICATION SEASON so I thought I’d take a break from my usually #AvGeek/rocket threads & talk some #AcademicChatter with my personal advice for those considering grad school. A thread...

#AcademicTwitter @AcademicChatter
All the usual caveats apply: I’m in engineering and while there are many different paths & perspectives I’ll be giving advice based on my personal experience. With that said hopefully it’s helpful to many of you w/ broad applicability outside of engineering
First: don’t pay to go to grad school. Many faculty have paid research assistantships (GRAs) and will provide tuition + stipend. You’ll still be underpaid but it’s really difficult to economically justify the benefit of grad school vs lost income if you pay your own way
Consider that if you’re expecting to graduate w a BS in engineering, the 💵 break even points for grad degrees are:
MS self-funded ~11 yrs post-graduation
MS GRA ~4.5 yrs
PhD self-funded ~15 yrs
PhD GRA ~5 yrs
Faculty are also more likely to fund a PhD student than an MS student in many cases. Why?

After breaking through the grad school learning curve, you maybe get 6mo-1yr of productivity from an MS student but maybe 3-4yrs from a PhD. Plus they count for more in our evals!
BUT many don’t know you can skip the MS and start as a PhD student from year 1 (I did and don’t have an MS). If you’ve got a PhD there’s generally no need and no requirement to get an MS first
Another BUT—the PhD track is at best arduous and certainly not for everyone. Proceed with caution. That is a long & challenging process and the economics of spending that long in school making a low wage (when you could be earning much more w your BS/MS) can be hard to justify
Why get a PhD? It can open the door to a career in research, in academia, and/or in a setting where you get to do a lot of self-directed study in an exciting field where you are passionate, with a good deal of autonomy and flexibility. So that’s appealing to many
Which brings us to the academic faculty track. You thought the PhD was tough? It doesn’t get much easier on this route, and the job search can be brutal. You’re probably looking at a stint as a post doc & maybe a research faculty slot before applying to tenure track positions...
The tenure track job market is wildly competitive and generally there’s only one cycle per year. So you put out as many apps as you can and hope for the best. After (hopefully) callbacks and interviews maybe you get lucky, but if not you know you’re waiting another year—not fun
Even if you’re fortunate enough to get a coveted tenure-track position, you get to spend the next five years stressing about getting tenure...noticing a pattern? 😆
That’s not to say academia is all bad (I’m here right? And I really enjoy it). The aforementioned appeal of freedom of research, autonomy, flexibility, pursuing new knowledge, mentoring/teaching/working w students, & impacting a community can be hugely rewarding!
And did I mention that getting a PhD is really hard? This entire path takes a physical and emotional toll—on you and potentially the important people in your life. Go in with a plan, be ready to manage the stressors, & get a therapist (it helps!!)
Seriously if you take one thing from this thread make sure you do everything you can to take care of your physical and emotional/mental health. Especially with all that’s going on in the world right now. It can be done in a healthy way but the grad school/academic path is no joke
If after all that you still want to apply to grad school & you’re still here, great! Let’s talk about where to apply and the things that might impact your decision
The first thing to know is that your faculty advisor is THE MOST important part of your grad school experience. They are your boss, your mentor, your biggest critic, & your most ardent supporter. Picking someone that you can work with on a topic you find interesting means so much
Search websites of universities you’re interested in, and look for people doing research in your target area. I would honestly recommend applying (and getting accepted) to the school FIRST and connecting w faculty second, unless you are directly responding to an ad for a student
Faculty get MANY cold emails from students looking for funding and in my experience it’s rare that those pan out. Where many of us like to recruit is from the pool of accepted applicants. Generally a list of admitted students + credentials is sent to all faculty
So you know these students are serious about the university, they may have indicated in their materials they were interested in your research, and you have their info already. If we need students and like what we see then it’s a no-brainer to send you an email
And even well-funded faculty aren’t looking for students every cycle, so don’t get your heart set on any one situation and try to keep an open mind

But if you do hear from someone remember it is a two-way interview! Ask questions and talk to their students!
Again, you want to go to the right school (right is different for everyone) but I can’t stress enough how important it is to have the right advisor—it means EVERYTHING

I realize not everyone has a variety of choices, but try to chose wisely and carefully (more on this later...)
A quick note for non-US students interested in aerospace & hypersonics: in academia options may be limited a bit but there are plenty of opportunities. Most academic research is “basic” meaning it is not restricted to US citizens
There are exceptions of course and some faculty almost exclusively hire US citizens, but the best way to find out is to just check out their lab website and look at the students in the group

Working in industry is more difficult, but you can work towards citizenship as a student
Another quick word of advice when emailing faculty as an international student is to try to be aware of geopolitical issues—if a big news story breaks about your country and the professor’s country not getting along, maybe put that email in the draft folder for a few weeks
Last, to those of you that requested this *months* ago I apologize it took so long! Hopefully this wasn’t too late to be useful

I realized I probably have TOO MUCH to say about this, everyone’s experience is unique, & it’s hard to condense into a thread, so please ask questions!
Okay just kidding, I hit the 25 tweet limit but some more thoughts on grad school applications/admissions...
I realize it’s a tricky situation given limited time and money for admission fees (which stinks) but let me try and clarify some of my thinking re:applying first
So you have some grad schools that are a bit picky about admissions but many schools that are just happy for people to apply that take a majority of the students submitting applications. Also a lot of schools have programs to incentivize current undergrads to apply in-house
Overall it’s very different from undergrad admissions and I might recommend emailing the graduate program coordinator (generally a staff member you can find online) for the department where you’re considering applying to ask about admission standards if they aren’t clear online
You CAN get accepted to grad school somewhere if it’s what you really want to do so if you apply to schools in a targeted&calculated way you won’t be wasting a bunch of time/money on rejected applications. You should only apply to 3-5 if you apply where you know you should get in
Think about this also: those mass cold emails to dozens or hundreds of faculty are not personalized or engaging, so to really connect w a prospective advisor you would want a thoughtful, well-crafted message specific to their research area. How many of those can you really write?
I think a dozen or so well-written cold emails to faculty at schools where you have applied and/or been accepted have a much higher chance of being successful than generic mass emails asking for funding
Also not a bad idea to write these emails while your application is being processed because faculty can help get you admitted. You’d be surprised how much faculty input is involved in the graduate admissions process, sometimes all it takes is one interested potential advisor

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More from @DrChrisCombs

Feb 5
Take that CFD nerds Image
From the Anderson hypersonics book Image
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Dec 14, 2023
So, if I understand correctly, it sounds like GE has successfully tested a turbine-based combined-cycle engine that incorporates: 1) gas turbine; 2) rotating detonation engine; 3) ramjet; 4) scramjet 🤯

Could in theory go from 0 to Mach 10+

Demo at full scale planned for 2024 Image
GE press release:

Some earlier reporting on the concept: geaerospace.com/press-release/…
aviationweek.com/shownews/paris…
Here's my explainer thread on turbine-based combined-cycle (TBCC) engines
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As we approach what may be a historic Starship flight test, this Reuters report is really, really bad

No excuses: as arguably the number one launch provider *in the world* the safety culture at SpaceX has to be better. They should be setting the standard (in a good way)

If we are going to continue giving them billions annually in taxpayer dollars, they can’t keep treating workers like disposable meat puppets


Image
And yes before you ask these numbers are much worse than industry averages Image
This is an absolutely total systematic failure that goes beyond SpaceX—NASA has some explaining to do about how they allowed SpaceX to operate in their own backyard allowing a > 20% injury rate Image
Read 4 tweets
Jul 10, 2023
If you're ever frustrated by someone with a PhD acting like a know-it-all outside their niche field of study, just remember that Albert Einstein tried to design an airfoil but it performed so poorly during testing it's flight characteristics were compared to a "pregnant duck"
HT to @milan_tomicc for reminding me of this the other day
For a bit more technical insight, bottom line is that Einstein designed this entirely using Bernoulli theory.

Stall at 12deg AoA @ 92 L/D

He later confessed he was "ashamed" and "this is what can happen to a man that thinks a lot but reads little"

Read 4 tweets
Apr 21, 2023
Am I being unreasonable in thinking that "clearing the launch pad" (that everyone knew would be destroyed) is a bit of a low bar for arguably the most successful launch company *ever*?

Sorry for having higher expectations for SpaceX?

The whole thing feels half-baked and rushed
I really want SpaceX to do well

We NEED SpaceX to do well

SpaceX has a great track record of success

There are tons of insanely smart, hard-working, talented people there

NASA needs Starship to put boots on the moon

So I expect more than what we got yesterday
When some brand new startup or a university rocket club sends their rocket into a death spiral at T+4min we all pat them on the back and say "space is hard" and "you'll figure it out"

I hold SpaceX (and NASA) to a much higher standard. SpaceX is better than this. It wasn't ready
Read 5 tweets
Mar 11, 2023
WE DID IT!!!

MOO-K SEVEN

HEIFERSONIC
I HAVE NO IDEA WHAT WE LEARNED BUT I'M EXCITED
Some quick notes about this images: first, this is from a technique called schlieren imaging and what you are seeing are density gradients in the flow. helps to visualize shock waves, expansion fans, etc.
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