some comments on this video are filtered out by KZfaq ( Google ) so sorry if you see that. It's not me.. so please comment and I'll do what I can to post the comment. I'd guess that Google classes some comments as potentially terrorist since the scramjet is the next wave of tech to be used on American drones. This would of course make them mostly invisible to radar and so fast they couldn't be stopped

interesting that "normal" jet-engines are actually the most complicated design of the three!

Terrific explanation for us non engineers. Well explained and presented.

I could listen to this bloke talk all day, reminds of the science VHS tapes in high school.

What interested me the most was the fact that while Queensland University has done so much work on this concept. The actual state of scramjet research is buried in the depths of "Classified" information probably in Russia and the United States.

Here after Top Gun: Maverick. Great explanation.

Who's here after Top Gun Maverick?

Australia has a long history of amazing inventions mysteriously being bought out and never appearing again. Remember Metal Storm? Where is is now?

Good lecture. I’ve worked over 40 years for the US Department of defense in the acquisition of weapon systems and one rule in certain, stealth is cheaper than speed

you really should look at the Sr-71 engine diagrams, the are normal turbine jet engines but with 6 bypass tubes moving air from the leading cone to the exhaust making them ramjets. As well as being able to keep the perfect pressure/speed mix by varying the cone distance.

The Maverick Package is awesome in the MSFS! Which brought me here.

Wish all the lessons I've had in my life were taught this way

As long as the projectile course of a rocket is in an atmosphere, the use of alternate methods of propulsion for a rocket is a possible option because the use of jet, ram, and scramjet technology increases the potential to reduce the material requirements needed to accomplish whatever task you are shooting for when utilizing a rocket.

i've watched this so many times; its just brilliantly easy the way he explains it, pity this guy wasn't my lecturer in college :- (

Extremely clear and highly informative presentation. Well done!

That was a really, really good video. So well explained.

Excellent and clear explanations. Such a complicated concept explained this easy is amazing. Thank You

We can always learn something new. It makes life so much richer. Thanks for a video that even I can understand!

I have not paid this much attention to anything in months, and this is information I really dont need for anything in my life

"90 [mph]!!? Why in tarnations would you be in such a hurry?" ~ 19th century engineer from Back to the Future III

Excellent presentation. He made it easy to understand. It will be challenging for the material engineers to come up with materials to handle the extreme heat issues.

Notice that it's actually dynamic pressure that counts for thrust, not static pressure. So it pays to take advantage of synergetic motion of the exhaust gases, and the mechanics of supersonic fluid flow.

As a teenager growing up in Folsom Ca. Right next door to Arojet rocket plant, you could hear them testing rocket motors ( normally solid fule ) some liquid motors, All the time. But for a couple of years they were doing development work for Boing aircraft on a Hybrid Scram jet motor, that ran on liquid hydrogen. They were trying to develop a commercial plane that would replace the Concorde. They were shooting for N.Y. to Tokyo in 60 minutes @ Mock 7. Every time they fired it up there was NO Mistaking the noise it made, + The duration of run time... the longest run time of Rockets was 30 seconds, most under 15 seconds, But that Scram-jet was in the several minute range. Usually 2 to 4 minutes, and the closest description of it's sound was that Horrible t.v. show Air Wolf when they hit the turbo button and went Super Sonic .... Never will forget that sound...

Sintesi: ottima spiegazione della differenza tra turbojet e autoreattore in pochi minuti. Chiari i concetti espressi con linguaggio appropriato. Livello accademico.

I JUST LOVE WATCHING THESE MACH 10 DOCUMENTRYS ON THE POTTY! im able to exit the bathroom at mach 2.

how do people put a thumbs down to a video that is talking about a concept that was tested and verified? just shows that no matter what, theres always haters out there.

Good video! Here after watching Top Gun: Maverick.

Thank you so much for this great video! This helped me a lot with a presentation I will make for my squadron in the Civil Air Patrol.

Wow! So educational and relaxing at the same time

I know very little about jet engines period and came here as a novice. Fully understood your description so within that paradigm, well done. Aussie Aussie Aussie!

Excellent video. May I suggest that when talking about speed in general you also keep in mind that most "proper" Engineers who work in an International environment find the use of the French "MKS" or Meters, Kilograms, Seconds to be an abomination. Especially the use of Kilometres when it comes to speed. I suggest "miles per hour" is far more widely used and by some of us less hated as a cause of confusion and errors. The quality of your video makes it worthy of an International audience beyond the narrow (but very lovely) confines of Queensland, Australia. Party on.

Supposing a ramjet were attached to the nose of a projectile fired from an electromagnetic cannon? As the projectile were moving through the air, the ramjet would detach and continue via its own power to Mach 6. Upon reaching Mach 6, a scramjet attached to the nose of the ramjet would detach and continue via its own power to Mach 10+. Sounds like a good idea!

Fascinating! Where's the beginning and the followup lectures?

When he said a jet engine can get you up to 1 KM a second, it really put the speed into perspective. A person running at full speed can do that in maybe 5-6 minutes. A car on the highway does that in about 1 minute. By the time you finished reading my comment that plane would have already flown about 20 KM.

The forcing cone on the SR71 was automatically adjusted forward or backward in relation to speed. The engines of the SR71 were made from materials not found in service jets. More so, the fuel consumption was reduced as the speed was increased. He uses a lot of facts to disinform what we’re capable of. We have vehicles that can exceed Mach 14.

This lecture demonstrates perfectly what I've started to many detractors for a long time, that the SR71 was capable of much more than its stated Mach 3.2 speed. It's my contention that the SR71 most likely went into a turbine engine idle condition around Mach 3 and then adjusted the inlet cone and afterburner section to perform as a pure ramjet. This capability would give the SR71 a possible speed of at least Mach 6. My thoughts are Mach 7.1, hence the SR"71"... just sayin 😉

Edwin Henry Blachford - What an EXCELLENT presentation . Correct me if I'm incorrect , but the ram jet / scram jet technology of the 60s' - 70s' was considered to be relatively "low tech" compared to jet engines . I worked for a company which manufactured experimental ram jet / scram jet engines . From what I came to understand - The fuselage of missiles and aircraft at the time couldn't structurally withstand the G forces generated by Mach 4 and above ... neither could a pilot . The structural integrity of missile and aircraft components has obviously improved with modern materials and many countries are returning to scramjet technologies . All the best to you Mr. Blachford and Thanks once again .

Excellent lesson and presentation, Edwin, thank you. Question: How dense is the H2 and plasma (protons and electrons) above the mesosphere? I'm thinking a scramjet for this stage would only need an oxidizer, if the fuel around it is sufficient.

Absolutely no idea why this showed up in my recommendations but it was really interesting.

This professor explain these super interesting subjects so well that I fell like I am a genious. Then I stop the video and fell like I'm the dumbest guy on earth again.

The perfect channel for plane guys...

Back in the 60s I saw a Cartoon about the guy who flew one of these. His name was Roger a Ramjet hero of our Nation.....

Thank you professor , it's well explained !

Nash . Needs someone with the knowledge having been there too. Thanks.

Hmm, I guess the goal would be a seamless transition from turbojet concepts to rocket concepts all in one engine. In which the traditional turbojet is fitted with a scramjet bypass as a function of the afterburner, in which of itself contains the rocket mechanisms for outer space travel. An engine that adapts to it’s environment, though quite complex due to the integration of the three systems at once, if not compounding the cooling issues and the limits of the combustion process

Dude you should be working for the DoD, move to Long Island and get a job at a DoD aerospace company. This is a lot of information for a lot of countries that don’t have the knowledge

Well, there are air-breathing rockets. They're combustability agnostic, using both fuel and oxidizer. But the heat of the rocket motors expand an airflow through the rocket for bonus thrust.

Now just imagine when/if we start using other propulsion methods entirely, leaving combustion/fire behind....

This dude just successfully taught some rocket science to my high-school diploma having ass. He's good

7:09 Talking about the Darkstar plane from TopGun six years early

Scary stuff. Torpedos flying at mac 10-14 means that people could be murdered in massive scale without seeing what hit them. I believe that starting with ramjets there is no way to intercept them due to their speed.

Built my first ramjet and finally perfected it. Runs awesome 👍

M

Have a commercial airline plane fitted with a turbine engine and a ramjet engine and a scramjet engine on each wing. Youll get faster than concorde speeds. Turbine engine will allow for 0 to take off speeds to atleast mach 2 or 3 than the ramjet will take it to about mach 6 than the scramjet will take it to about mach 10 or beyond. Youll get from london to new york probably in about 30 minutes.

I can think of some other tech (already out there) that when combined with this ..would certainly tickle Mach 14 and possibly beyond :) Congratulation to all involved. Stay on that leading edge of technology, I truly respect people like this. Bravo!

Thankyou so much this was the fist time I understood the design and working properly .. now i can make a super sonic jet into hyper just by adding a part .. oo wao i love my ideas.. then it can really make a scramjet go from 0-12 /// awesome thankyou

You forgot to add that the Scramjet or Ramjet engines are only used on the sr-71 BlackBird which flies at the edge of the atmosphere, around 65,000 feet. They use about 35,000 pounds of thrust engines for taking off, getting up to a certain altitude, & landing. Then weather it is a Ramjet or Scramjet engine, bypass doors open to direct the in coming air around the internal engine straight into the combustion chamber then out the aft of the engine again bypassing the high & low pressure turbine section & then out the exhaust of the engine. In the upper atmosphere there is little oxygen so the air entering the engine has to be highly compressed for combustion to take place. This is done by the bypass tubes which compresses the in coming air to a high flow rate & compresses it. Then ignition occurs then the exhaust gases exits the engine at a much higher pressure and flow rate. This creates a ventorii (sp?) effect which was used on cars with carburetors. The sticking point is how to compress the incoming air & increasing the exhaust gas pressure and flow rate to increase the vacuum thus drawing in more air to increasing speed.

Albeit a relatively old video, check out my 'historically accurate' fictional books, "AURORA: the Ultimate Spyplane" and "AURORA: Journey to ALMAZ-3." In both books I use a SCRAM to obtain orbital velocities for my theoretical Aurora airplane. Did Lockheed build and fly it? I believe they did. At the end of 'Ultimate Spyplane' I present a number of real events I encountered that support my theories that I turned into a pair of books.

My X wife was the first ram jet. She was rammy all the time. Never knew when shed take off and flame on and explode

Since air is compressible and so there is a limitation of how much we can push against the air without losing thrust by over expanding it at the outlet. A multiple out put of the same engine and the geometric arrangement of it may help improve efficiency but for hypersonic speed we need more with something like inertia system that could help to develop extra thrust without over expanding air

great presentation and voice clarity

Really informative and entertaining. Well done!

My engineering mind tells me that there is little inlet control in all the engines displayed here, the only control mechanism is the turbine compressor, which I think is too little control of the air and drag. The scramjet just relies on the atmosphere and shape of the inlet.

Great explanation, would recommend 1.75x speed though

Would it be possible to have deformable engines that can work as ramjet and scramjet interchangeably?

I would like to comment about your ramjet/scramjet engine and I think a method for adjusting the compression for proper combustion. You have shown a center-position airflow restrictor that is not moveable and I think that is the key to adjusting compression. Make your restrictor moveable, such that it can be used to adjust the compression to a suitable level. And consider using different types of fuel for flight at different altitudes. And consider using a ramjet engine at take off speeds as they originally did post WWII.

Thankyou for the excellent technical bteakdown Sir....fascinating stuff. Now I understand why at ADELAIDE INTERNATIONAL RACEWAY....back in the 1990's .. the "F4 Phantom" powered JETCARS were doing "quarter mile" runs under 1 second !!!!

Absolutely clear explanation.

engines are powerful enough, U therefore just need a super high temperature wing fuselage that will decrease wing loading intermittently.

Enough thrust to overcome it's drag. Wow!

very nice, clear description of engines. Good job !!!

It is said that the genius of Albert Einstein wasn’t only that he came up with the theory of relativity, but also that he could explain it so that a child could understand it. This video reflects that kind of genius.

Where do Pulsejets, like the V-1 fit in here? Can a rocket be used to cross the Ramjet/Scramjet interface in real aircraft (not just research vehicles)?How about directing the air from one chamber (like a revolver with or without moving parts)?Maybe one inlet that divides up and the side shape restricts till the cylinders are synced like a multi-engine airplane, but firing in sequence like a V-8 car engine?

While you're scratching your head over a scram jet, in my garage I'm working on the BAM jet... BAM Biatch! Very interesting video btw.

I have a question, is there any speed that we dont need a angle or curve on the air intake to slow down the air speed and compresed the air?

What a wonderful way of explaining things you have !!!

Good, clear explanation!! Thank you.

What I know about Ram Jets and Scram Jets is that they are half Jet technology and half UFO technology, the future of warfare may be super sonic scram jets drones, which are unmanned military fighting aircraft.

I have a hybrid engine idea. A normal jet engine with vents that could be opened on the side to bypass the turbines. These vents would open after passing mach 3 or 3.5

That scramjet is incredibly elegant

How fast can a crapjet go?

best video on this topic thank you!

There are air breathing rockets, have a Google of Reaction Engines and the Skylon projects.

We should develop a motor which displaces atoms ahead of it by fission (or is it fusion?) by probes at the front of the . . .craft so that the craft moves forward into the atomic vacuum.

If we could create an adjustable aircraft with a jet engine and afterburner that then activates a ramjet when at top jet engine speed with the jet engine retracting into the aircraft body or closing off the engine aerodynamically. Then as the ramjet approaches maximum power, morph the design with hydraulics into a scramjet configuration to utilize a scramjet to get to top mach speeds. Place a rocket engine onboard as well and have that fire up at maximum scramjet speeds. Close off the scramjet while the rocket fires and this vehicle can hit mach numbers upwards of 15+. If a lot of the wings and parts are dynamically controlled to morph in shape and position through these various stages of flight, then the vehicle might be capable of going from takeoff to mach 15+ and then returning back to land. The engineering would need to be exceptional, the meta materials at the forefront of materials science, and the fuel consumption planning precisely calculated, but as a grand experiment such a craft could prove very versatile for very specific missions.

Believe it 9r not but that thumbnail picture? That wing planform glides real stable

I welcome the people who tried to look for the guy who copyright claimed the calling.

I'm assuming these views will go up slightly after Top Gun: Maverick

KZfaq algorithm, good job.

At some point you'll have an issue with flame propagation inside the combustion tubes of the scram jet design, where by the only way to rectify is to increase the length of the combustion process or accelerate it.

It's so weird how these superfast engines are simpler in principle than the first 2strokes engines from over 100years ago

Russians and the Chinese are eagerly learning this vid as we speak

Lucid explanation.. Great work👍

Great clip, nicely explained for a non technical person like me. Perhaps we need to look at different ideas of propulsion. Electro-mag, gravity, who knows but rockets are old tech. Somewhere, I suspect some military contractor must be looking at some really interesting forms of propulsion.

To go beyond Mach 14 we need WHAMBAMJET then beyond Mach 20 POWWOWJET. Done I present to you my contribution to Jet Research, the names.

I'm a bit confused by the statement that, with high-temperature air intake flow, the combustion process would become more difficult. I understand the difficulties with supersonic combustion, but I had always assumed that this was due primarily to the speed of the flow that the flame/propellant was encountering, so it's confusing me a bit to hear that the issues with supersonic combustion actually come due to the temperature of the air intake rather than the air intake's velocity. Can someone please clarify this point for me? Thank you very much for this great video!

Excellent presentation.

What a great presentation

Fantastic presentation

shall I use synthetic oil or regular in my 67 mustang