Yes, i did on my only race with my bike, but i cant remember any sound because of my intense fear of death,
the physical characteristics both on the supersonic wind and my own feelings can be defined as turbulent

To say the least ‘Obligatory’ – your brand of sarcasm is somewhat refreshing; indeed a supersonic-bike!? Really?
My reference to a ‘supersonic wind pertains to aerospace propulsion systems. Case in point: each and any time one hears the ‘roaring’ sound of a rocket engine or a turbine engine – with afterburner (reheat) – such flows of air are in fact moving at supersonic velocity. My main point here, therefore, concerns MHD (which produces thrust without combustion), a supersonic flow of air (a noise/sound) of a jet or rocket but without the noise of a turbine ‘whine’ – This was the purpose of my question about a supersonic-wind :dev2:

Well noted Obligatory sir

Here is a small riddle (of sorts) for anyone willing to answer – which is completely relevant to this particular topic: Has anyone of you ever heard the sound of a supersonic wind (you know, when the air is moving at supersonic velocity)? And what does it sound like to you ? And what are the visual physical characteristics of such a supersonic wind flowing past an aerodynamic body? 🙂

Could you clarify sir? 🙂

Developments in Plasma Technology

Thought I’d move this to its own thread as the topic is interesting and has the potential to massively impact the future of flight. It would be good to compile a list of developments that have occurred over the previous few decades.

Upon hearing about the development of LM’s proposed SR-72, I began looking for any information to get a clue as to how far along hypersonics development had matured, searching for DARPA RFI’s, patents, etc.

What I found around the period of 2005 was that there were numerous patents lodged by the major US aircraft manufacturers for their propulsion concepts, but more interestingly there were a similarly large number of patents filed for plasma technology for augmenting aircraft aerodynamics and propulsion.

As an initial post, the list below contains a few interesting patents for plasma based propulsion and airflow control systems. One of these claims that the system can effectively negate aerodynamic drag using a system of plasma airflow injection and electromagnetic accelerators on an aircraft’s surface, in fact it can turn the aircraft’s skin into a part of the propulsion system.

The patent claims the system can be used to perfectly control airflow into a a jet engine and can eliminate the need for moving control surfaces as airflow around the aircraft can be controlled using the solid state system. Apparently the system is quite small so one wonders if something like this can be retrofitted to existing aircraft.

Here’s a couple of LM’s patents from around that time, will dig up the Northrop and Boeing ones when I have a little time.

[ATTACH=CONFIG]230021[/ATTACH]

Some are unrelated to aircraft applications, but the main ones of interest are:

8.006.939 (controlling airflow using plasma accelerators) – 2006
8.453.457 (plasma thrust vectoring) – 2009
8.242.404 (plasma jet design) – 2010
8.523.115 (Boundary layer flow control) – 2011

Has anyone heard of similar developments from other nations perhaps?

Yes; Russia did extensive research and development with their Ajax hypersonic research project; both in aerodynamics and propulsion.

Sorry, just checked, my story above isn’t 100% accurate, although the general premise is.

2nd time around, the Eagles just got told of the general area the Blackbird would be in; not the exact flight path.

Well if I may add a few details to your post is this: The name of the F-15s v/s the SR-71 intercept exercises, had the name of ‘Eagle Bait’ and even the U.S. Navy got their chance to see if their F-14 Tomcat could intercept the SR-71 Blackbird – these exercises had the name of ‘Tom-Too-Hot.’ The F-14s could never get a radar lock-on long enough to make a successful intercept; they too failed to intercept the SR-71 Blackbird. The F-14 crews were given the same information as the F-15 crews.

Forgot to mention, how many times did MiG-25 Foxbats try and intercept the SR-71 Blackbird on operational missions ? Or how many failed intercepts were attempted by SAMs fired at operational SR-71s over the course of it’s operational career?

Would you be so kind as to post that particular magazine article my dear Pinko? I ask this because I have not seen the article in question. And also post the pics that was released in the article – if possible. In advance, thanks

Note Pioneer joined the forum 8 years ago (4 years before you) and has over 6 times as many posts as you here.

Save your snide remarks Bager1968 – and why do you simply state the obvious with your remarks? I was unaware that posting was a numbers contest; or who has the most posts on this forum. I was simply paying a compliment to Pioneer – and what was wrong with that? Or better yet; what did you not like about my simple compliment/welcome post? I was under the impression that this thread was about “Nice Pics’ or photos of one’s favorite aircraft – or maybe that impression is wrong, too(?). Excuse me – but I know this is the “Mirage IIIO” thread; my mistake – but still nice pics of the Mirage IIIO prototype with the Avon engine 😉