Supersonic Aerodynamic Control 

What happened to your RCS thruster system I think I saw you show off in an Everyday Astronaut video? Could that theoretically work in a situation like this?

Looking for an intern?

I sent a email to you a email a few months back about rollerons.. nice to hear you talk about them

Please do not use scam ads. Thumb down.

As someone who just finished their mech eng final project that (to my own detriment) involved a truck load of ANSYS simulations, I don't envy the CFD that you ended up having to do 😂. I'll look forward to the next video with the details.

That's not his department. He just wants to go up.

@@ChucksSEADnDEAD wink wink nudge nudge, say no more

That's just me I'm homeless not FBI. The other guy is FBI tho and hes in my van questioning me about your RU-vid comment.

I know playing with terminal guidance is a taboo of sorts. But is it actually illegal? And how come there is so little on that topic available online outside of the US?

​@@MoritzvonSchweinitzit's not illegal per se, but doing it without license is problematic and posting about it can be illegal. But that's US. It is illegal in many other countries.

Same dude, same

😂😂

"Alright, we're BABABABA into the video..."

This. 😂

So true

Same

@@everettgihring8099 That

Don't be sad. You've got just enough time to study Quantum Field Theory before the next video.

Collab????

@@reuellouwrens9853 I mean, Lafayette Systems already uses this type of control on their DIAMOND-X rocket.

🆙🆙🆙

Was that a reference to the informal nickname of the AIM-120 AMRAAM, or just a coincidence?

@@mortlet5180AGM-84 SLAM-ER

EYYY JOEY B SLAMMAS HOW YA DOIN’

Yah pretty sure Salvatore pais scaled this technique up to make the tic tac vehicles.. wingless UFO can only be explained via vacuum creation via high frequency vibration. Likely powered by compact fusion reactor.

So, duty cycle control? I've seen it work with rocket motors (see: kinetic kill vehicle used for the DART) but never with fins. Interesting!

Which is not a very new concept as we used similar methods for early R/C aircraft control before we came into the wonderful world of Proportional servo control, in the late 60's.😁

@@paulholmes672, well it was the early 1960’s when he was doing it, so yeah

Nice ... use of random control noise, and then removing some randomness to influence control. Makes me wonder if the "dithering" was a technique to disrupt shockwaves traveling across the control surface.

YOU KNOW IT 🆙

we goin UP 📈

We’re going ⬆️⬆️⬆️⬆️⬆️⬆️📈📈📈📈📈📈📈📈

Awww thank you so much dude! That means a lot :)

100% ♥ ... x-plane level engineering!

I hear you. We have NO regrets.

@@glennllewellyn7369I do

Sometimes… life SUCKS and sometimes, the thing you make are… disturbing

The problem is that funneling air into a supersonic flow isn't exactly for the home gamer.

building a wind tunnel is actuly kind easy. building a supersonic wind tunnel however, less easy.

Actually, building a supersonic wind tunnel in itself is not that difficult. Gathering the relevant amount of currency to do so, while building it in a place that is about 500 miles from your nearest neighbour........ different story.

As someone that studies Engineering Informatics (mixture of computer science and electrical engineering) I often have to work with computer science that had never heard any physics or mechanical engineering lectures and they are most times better at algorithmic and similar thinking stuff but don't let have mechanical or electronics ideas. Wind tunnel up to a couple of hundred km/h no problem use a fan big and fast enough and you are good to go. You still need to think about how to reduce the effect of the turbulance of the fan, maybe build a pull configuration the expected wind speed for the same input power is slightly slower but should still work. But now the trans and supersonic Problems. These speeds are not possible with a fan alone. And the pull configuration does nothing. If your fan is to powerfull you suck a vacuum but still don't get mach 1 and in the push configuration you still would only near to mach 1 and than produce a high preassure zone. So you need a nozzle the same type as the one on the bottom of a rocket engine. It solves the Problem of converting high pressure gas to high speed gas. BUT the gas goes from very high pressure (tens or hundreds bar (atmospheres)) to 1 bar or below every expanding gas cools down. And this kind of depressurization would lead at least to freezing water and CO2, but depending on the pressure drop even to liquid nitrogen or oxygen (unlikly in home build variants). So you don't need to start with a high pressure gas. You need to start with a high pressure high temperature gas. Problem is most materials get weaker under high temperature but the high pressure is really high so the whole thing is near its failure before you even have moving gases. Second Problem you don't want to see effects of pressure waves reflecting of the tunnel walls because that would cause similiar uncontrolable feedback loops as the canards to the fins earlier in the video. So the wind tunnel should be at least factor 5 to 10 bigger to the test object (model rocket) now we test a small model with a fin can that is only 5 cm in with (to be honest to tiny to have good estimates on how a big one would react). The wind tunnel has at least to have a diameter of 25 cm. 0.25m*0.25m*pi/4=pi/64 m² this times the desired speed of 300 m/s (yes I know speed of sound is faster under normal pressure and temperature but I will not estimate which temperature we could manage to reach in our tunnel) at 0.5 bar is pi/64 m²*300 m/s*0.5=7.36 m³/s. So you would need every second of testing 7.4 kubic meters of air delivered to your wind tunnel, forget it. This is for each second 4 full (and not the smallest ones) air bottles that divers use. Because there is no for not that rich individuals available solution that would produce this preassure and quantity of compressed gas on the fly (exeption rocket motors but they burn to hot to hold a normal test object in exhaust).

I'm working on aerodynamics of rockets myself. From what I've heard from a people who works directly with that kind of aerodynamic tunnels, just the cost of preforming a single set of tests on subsonic tunnel capable of fitting rocket this size is at minimum few thousand dollars. Not to mention building a supersonic tunnel. You can get good results just by simulations alone tho, I basicly work with that, Solidworks is a pretty good tool for obtaining such data and is extreamly easy to use. However I would questions it's results for trans sonic flows.

transonic is really hard (it's why jetliners which have the power to exceed about 0.85 mach just don't). Best bet here is just to get through to the other side as fast as possible.

REAL

What about laminar flow?

😮😭 *Quadratic Equations left the chat*

there is one and it is called calculus

​@@user-mn2su2qg3c Hell yeahh calculus the GOAT

KEG ROCKET NO WAY, bro can you please tell me if your gonna keep uploading in RU-vid I need to know!, I’m a big fan bro!

So excited for your project!

Be prepared for lots of failure, and you best damn well make sure you get up and try again. Do. Not. Give. Up.

Me too I was 12 when I saw this guy and now I’m 16 sending my first high power rocket

@darkmetal20 Me too!!! I already tried to build a sugar - kno3 rocket but it failed This summer I will try again!

Internet safety: 📉📉📉

Bro I love been checking like once a day for like 3 months

@@JackDalfino I just turn on notifications

We are all excited but why are you yelling?

@@dr4d1swhy are you so mad, and I’m not yelling dumbass 💀

Ikr😂

lmao elon needs to see this🤣