This Plane 'doesn't exist' - SR-75 Penetrator

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[Chris-okzo]

Never ceases to amaze me the lengths man will go to fully embrace the phrase "Gotta go fast".

[UncleRayRayGarageEmporium]

1992, Okinawa, Japan: While playing volleyball with my fellow Marines, I noticed a contrail at high altitude. It was the classic doughnuts on a rope shape. I couldn't see the aircraft, but I could see it forming and moving. It crossed the entire view of the sky in about 20 seconds. No sound, no sonic boom after it passed from sight. Very impressive to witness.

[huwzebediahthomas]

If the SR-71 was around in the 1960's, the mind boggles on what could be around now.

[terryjohns]

I grew up in Barrow Alaska on the arctic seaboard and in 91' and 92' while out skywatching we saw a few times, these pulse craft flying incredibly high covering huge distances in mere minutes. One time we watched one making a big arc in the sky with another craft cutting the arc in an apparent attempt to cut it off . We didnt see what happened as they flew out of our sight headed north east.

[TimTheInspector]

Airline pilot here, earlier this year I watched donuts-on-a-rope contrails being made up close by the most unexpected source. At cruising altitude just before top of descent into LAX we were passed by a 737 a thousand feet above. Both the 737’s engines were leaving contrails that were sort of rolling back on themselves, forming into rings at regular intervals. I suspect it had something to do with the mixing of hot turbine exhaust and cool bypass air forming ring vortices and the conditions were just right whether it was speed, thrust, temperature, moisture, or some other factor(s) causing it. In one way it’s disappointing they weren’t being produced by some black triangle but in another way it’s fascinating that they were formed by such a benign and common type.

[DavidMitchell]

In the spring/summer of 1997 I observed something appearing to be the mother craft for this flying from west to east over Grass Valley and Nevada City in California. What attracted my attention was the very "solid" looking contrails that did not dissipate as quickly as normal contrails. The plan form was similar to the SR-71 but was much larger. The forward fuselage was longer in relation to the delta wing area than that of the SR-71. There were no inlet spikes or engine nacelles in the leading edge of the wing. Having maintained the navigation systems of the SR-71 for nearly 7 years during my USAF career, I was certain this was not one of them. The aircraft was flying low and slow and over a low population area of northern California. If that was this mother ship, I suspect it must have had some form of IFE (in flight emergency) that necessitated the slow flight envelope. Around the same time frame, I would see three KC-10 tanker aircraft flying in formation over my residence at Penn Valley, CA on Thursday afternoons. About a half our later I would hear a loud growling sound going high overhead. Looking up, I could see nothing, No contrails no aircraft. The sound travelled from the south horizon to the north horizon in approximately 30-45 seconds. Yes, the government and contractors can keep aircraft projects secret for years before the public ever hears about them. The F-117 was a prime example.

[HOTSHTMAN]

I know a lot of you wont believe me, but back in around 2012-2013, new years eve, some missile or plane flew over Ontario, Canada. It was so fast and the “shockwave” was so strong that it shook the house and made a sound as if a huge piece of ice fell from the roof. I went to school the next day and everyone at school heard it, even though we live far apart from each other. Literally everyone. It was the buzz in high school. Ive been to several air shows so i am well aware how jets sound like. Funny enough, so many people heard it in Ontario that the same morning there was a segment on CP24 stating that this was all just something related to the weather and how the cold air interacts with the atmosphere (something like that idk) blah blah. This “boom” occurred at around 9-10pm and very cloudy conditions. As i started looking into conspiracies and especially those related to flight, the second i heard about pulse based jet engines, i knew some top secret flew over the province. It would have been perfect conditions for it, low clouds, cant see a thing, slightly foggy weather, no sun, thick clouds, etc

[egaroadkill]

Back in late 80's one doughnut on a rope contrail, with associated seismic track, drew a straight line to Johnston atoll while another one to Eniwetok. I heard others tracked similarly. I even had the displeasure to hear the "sky ripper" early in the morning in the Navada desert.
I have a friend from childhood who had the life path I dreamed of being an Air Force aerospace scientist from 79 till 2010. We met at a school reunion. I asked him about what he could tell me and he replied it's beyond your imagination. I reminded him of just how advanced both our imaginations were back when we were in school, and he said that it was still beyond that. I had an uncle who was an Air Force LT. General that served in the technical field for 40 years. He pretty much said the same. He also knew about my technical knowledge and imagination.
The US has been working on some seriously advanced stuff. I can see why the SR-75 is no longer with us. It's out dated and a waste of money.

[huwzebediahthomas]

For very remote airbase, RAF Macrihanish has surprisingly extremely sophisticated ground electronic equipment. Another rub chin been RAF Benbecula, also remote Scotland. Might be backup.

[keirfarnum]

That last little bit about the oil platform worker and “seasoned aircraft ‘observator’ [sic]” (it’s “observer”) is a reference to Chris Gibson, who witnessed a triangular craft being escorted by two F111s in the North Sea in the 80s or 90s (IIRC). Gibson was an award winning aircraft recognition expert who couldn’t identify what he saw from the oil platform he was working on.

[GhostSecuritySolutions]

Scramjets were designed in the 1930s. Material science took decades to create materials that could withstand the heat created by travel at the speeds the engines were capable of. The program trying to design a fusalage for the engines was public in the 80s.

[joshmarshall]

contrail shape is not dependent on engine type, it's dependent on aircraft shape in reference to drag. Contrails are formed when low pressure air is compressed. the water vapor in the air is compressed as well and forms the "clouds" of a contrail. Yes the engine can do the same, but most if not all contrails are actually from the wingtips or the areas around the engine nacelles, the engines themselves are not creating the contrails, thus there is a high amount of turbulence. Turbulence is where low and high pressure convalesce and thus compress the water vaper into "clouds". I should say this, no airframe can be designed to not produce any air turbulence, thus every airframe will at some point create contrails. Even normal turboprop engines can create "pulse" contrails, the same way every pulse jet engine can create smooth contrails. Like I said, it's not dependent on the engine, it's dependent on the airframe shape.

[jettack]

Looks like if a sr-71 and xb-70 were combined

[Mr.Pie]

I know a guy out in Arizona near Bullhead City. We did some ATV tours with him and he had a desert homestead with a bunch of very nice things such as Xboxes, PlayStations, a bathroom being Nicer than the one at my house, and much more. He is also completely off grid, in his early thirties and has lots of friends who work in the government on things like this. As we were going around the trails in the black mountains he would go on to tell me that he had this one friend who told him, as well as he somewhat witnessed himself, an aircraft that went across 6 states in five seconds. He told me all about it and how he has seen these secretive aircraft with insane speeds. And this was all before the hype of the dark star and all of that. I truly do believe without being some conspiracist that the U.S. does in fact have these hypersonic aircraft.

[soniccdx]

i remember building the Testors model kit of this a long time ago, and always wanted to get the plane which piggybacked on it but never got it, and probably is the reason why i kept building similar looking planes in Kerbal Space Program ...kinda exciting to see a video on the plane after a long time

[forbiddenera]

9:14 250 miles at Mach 15.. so like 1.3 minutes of flight time 😂😂

[theeddorian]

One fact that you missed concerning the Southern California hypersonic sonic booms, is that the USGS seismograph system that detected these, was replaced by the Department of Defense, according to many sources. This new system, somehow, no longer detects, or possibly filters out sonic booms from aircraft.

[dfwrailvideos]

Flying a pulse-jet powered aircraft over populated areas in England, especially only forty years after WW2, is going to raise some eyebrows.

[lionemessi]

I have been hearing about this plane for about 20 years. Im starting to think bigfoot flies it

[thetruenolan]

The contrail shown at 20:52 is almost exactly like one I saw in north Florida about 2010. I wondered what kind of meteorological conditions would make such a track but did not think about any kind of pulsejet.