Hazards Of High Mach Flight

Dassault falconjet promotional video covering the following topics: coffin corner, control surface buzz, aileron snatch, gust flight envolope, shamelessly plugging dassault aircraft

[@kukulkanlordofcas4931]

This video really helped me fly my single engine piston better. Never again will I have a post-mach excursion.

[@eloycolombo7125]

🤣

[@jerryfusilli8152]

Cancel my gulfstream order please.

[@jibeneyto91]

17:40 - Awesome! That test pilot must have been knowing what he was doing! Brass balls rolling the plane like that at .97 Mach...

[@antigen4]

yeah but that's ground speed not air speed. they were at 520 kts - whereas mach 1 is 660 kts

[@samstanfield2634]

Mach number is mach number regardless whereas IAS varies with altitude. They were damn close to mach 1.

[@v1_rotate638]

660 is at sea level, not at 430

[@DrCash7]

Totally worth it for the test flight at the end. Starts 17:22 but worth watching the entire sales pitch to see all that's at stake.

[@brandonmiller4632]

Great information and explanations of high altitude and high speed flight characteristics. The in-flight demo capped off an impressive video. Thank you!

[@Flightstar]

I'm convinced, Im going with a Falcon. Now I just need to find a rich Uncle.

[@HaydonHolcomb]

Let me know when you do and I’ll fly right seat!

[@abhinavraj932]

I am going to send you a friend request on Facebook

[@dmimcg]

Last week I was flying my Cessna 152. As I approached 560 mph, I noticed a little bit of buffet. I eased off on the throttle a bit back down to mach .88 and it was all good.

[@wireflight]

Did the same in a Piper Cub with a STOL kit. Got a little hairy at the fringe, but 0.86 and below, it was smooth as glass. >XD>

[@uropygid]

With a good fresh wax job, my 150 is smooth to M .94.

[@itsumonihon]

i'm really dissatisfied with the Cessna 152 my flight school used. When I reached 540mph IAS i noticed that there was buffeting. even when i raised the flaps, it wouldn't exceed 550 without turning off the carb heat. time for a falcon bizjet upgrade i think.

[@godfreypoon5148]

I'm somewhat disappointed with my Nissan Versa. Just yesterday I experienced significant buffeting above 58 mph even with the windows raised, and and the passenger began performing a dutch roll.

[@kerbalscuffedprogram4705]

I brought my xr2 to an altitude of Mach 9.935

[@heyitsvos]

Promotional or not, the test demonstration was pretty impressive.

[@rodneysimpson4805]

HeyItsVos I

[@antigen4]

except they were about 140 kts BELOW mach 1... nobody else caught that?

[@petersnyder1241]

This is a cheesy instructional video....ugh!

[@a50204b123]

This is what u call a educational advertisement.

[@christianpilon7725]

Falcon is the roll-rocye of prive jet :))

[@josephdupont]

I'll never forget seeing one of those falcons fly routine at the Morristown Airport New Jersey the man was amazing he actually did this approach and did a loop as it came out of the loop he threw out his Gary put out the flaps everything and just he's that thing in like it was nothing I had to I had to shake his hand I've never seen anything like it before or since

[@mattfgln]

Was Gary ok after being thrown out of the plane ?

[@MrFg1980]

Impressive demonstration. Would like a 900EX...

[@Lawiah0]

"This is a completely different type of flying"; altogether.

[@grlldfsh123]

"Coffin corner? Just not a problem in Falcon Jets" ... God's gift to aviation huh

[@jeanlafitte268]

No one ever accused Marcel Dassault et Cie of modesty. Of course, their jets pretty much do what they're advertised to do.

[@eloycolombo7125]

Wow!

[@michaelmitiszek1538]

Falcons are nearly as robust as fighter jets. Great planes!

[@rajathpai9573]

obviously not, but what he meant was that their expertise from fighter jets translated into a robust jetliner

[@nuclearwarhead9338]

@@rajathpai9573 the keyword "nearly" didn't mean anything to you?

[@patjohn775]

Look like he can’t read well

[@t.w.3]

RNoAF uses Falcon Jet 2000 for EW and Weasel missions as well as other "classified" stuff.

[@AviationChannel452]

Incredible

[@glassarthouse]

It's a Falcon promotional video, so not really shameless promotion is it? I mean, that is why they designed the video.

[@richardturner2150]

Right, time to buy a Falcon.

[@PotholesInMyLawn]

Impressive

[@CompetentSalesUSA]

Audio issues,

[@truettneathery4358]

How does this apply to commercial-size liners ??

[@bradcrosier1332]

The principles are the same, the majority of commercial airliners also have hydraulically actuated controls.

[@intothewildexplore]

why the fuck there are still people putting thumbs down on a video like this??? what's the point??

[@RehdClouhd]

Anyone know how stall speed and a.o.a. change at high altitude? And why..

[@capncrunchdorf]

The density of air is significantly reduced at high altitude, so for a given airspeed and AOA there would be less lift, and hence a lower stall speed

[@RehdClouhd]

@@capncrunchdorf it is a higher stall speed (KIAS/KCAS), correct? And lower a.o.a., but why?

[@crohr1000]

@@RehdClouhd yea higher stall speed. Because the air is lass dens. If you take a knife and try ti ggo through water at some aoa and try the same thing through air So imagine the water more density and air less dansity(high altitude) Thats why lower aoa can be used at high altitude

[@jeanlafitte268]

This is pre- Cessna Citation X, isn't it? The tables don't compare Falcons to Citation X. And before you say it, yeah, Citation X needs yaw dampers and autopilot at the altitude and speed regime they hand-flew the Falcon at during demonstration.

[@donc9751]

The video looked like it was made in the 1980's! VHS qual....

[@remf4519]

Fab video!! I didn't know this about a Falcon. Time to get type rated. I calculated £11,000 in fuel from Dalian, China to Memphis - correct me if I'm wrong. (or maybe that was just Fairbanks)...?

[@TheMkarr]

I'll take a bakers dozen Bob.

[@0RespectMyAuthority0]

I'll take 3

[@snikxel]

nice demo ricing .97 mach

[@jaimefabrega9635]

Is the Citation X listed? Could not find it.

[@ce-750pilot3]

I don’t see it listed, because it has all the safeguards the Falcons do at high Mach speed.

[@DoubleMonoLR]

The video was almost certainly made before the Citation X was available. The plane being flown in the video was first registered in 1978, the Citation X first flew in 1993. The video was likely made in the 80s.

[@williamshafer3199]

yeah i'm convinced. put me down for a fleet of 10, oops over-budget, discount for 7?

[@lejink]

Can’t be crashed? Hold my beer, I got this

[@Herr_Jehmineh]

Alright, I'll take all four!

[@MegaFPVFlyer]

Huh! I never would have guessed an aircraft capable of M .85 would have an IAS limit as low as 370 knots.

[@alexanderkamerbeek9693]

Oké as nobody seems to have taken the time in 8 years to explain de difference to you I still will so you can finally rest knowing the answer. Ias limit or Vmo is a structural speed due to air resistance especially at lower altitudes where a Mach crit or Mmo is a aerodynamic limit. So both limits have different outcomes where the Vmo can actually damage an air frame where Mmo can cause control issues.

[@MegaFPVFlyer]

@@alexanderkamerbeek9693 Thanks! In the time since I wrote that comment, I *kinda* figured it out, but you put it in a way that's much clearer :)

[@mlasko74]

Bitchin!😁

[@gorflunk]

Others: 15 Falcon: 0 Kind of a morbid use of that analogy.

[@justynkevlar3031]

I live at mach 3.

[@scottb721]

I shave with a Mach 3

[@zamacabandb6017]

Somebody help. The speed of sound depends on material or fluid density: the denser the material the higher the speed of sound (think putting your ear on a train track...). At sea level the air is denser and therefore the speed of sound is higher than at high altitude (any altitude) because the air pressure is less. Yet at 2:00 - and this is not the only youtube location where I find this stated (!), it is said that the speed of sound depends on temperature, and because the temperature is lower, so is the speed of sound. The opposite is true: the lower the temperature the higher the density, so the higher the speed of sound. At high altitudes the speed of sound is higher because of the lower air density (the temperature may have a negative but not linear.contribution, I am sure there are plentiful studies).

[@turbofan450]

I think the temperature of the air at high altitudes has a less significant effect on the speed of sound when compared to the density of the air. The air up high is so thin that it would have to be much colder than what it is in reality, to make the speed of sound increase. So yes, colder air would normally mean faster sound speeds but the air is so thin that the cold temp is negligible...i think.

[@mikenorman4001]

The speed of sound in an ideal gas, and air is an ideal gas at the temperatures and pressures you are likely to encounter, is solely a function of temperature. That function is: a = sqrt(gamma x R x T), where a is the speed of sound, gamma is the ratio of specific heats (about 1.4 for air), R is the gas constant for air, and T is the temperature. R and gamma are constants, and T is the only variable. The remark , "the denser the material the higher the speed of sound" is the reverse of the actual state of things. Modeling a sound wave as an oscillation, temperature is the spring, and density is the mass, of the spring-mass system. For a given spring, a higher mass results in a lower frequency. (You'll probably find that your intuition has been shaped by things that are relatively more stiff than they are dense.) It happens that temperature modifies the gas properties in such a way that the net result is that the speed increases with T^1/2. Cheers!

[@DoubleMonoLR]

The video is correct(it would be surprising if it was wrong, considering the source and nature of the video), altitude/density in itself is basically irrelevant. It's summarised quite nicely on the wikipedia page under a chart: "Density and pressure decrease smoothly with altitude, but temperature (red) does not. The speed of sound (blue) depends only on the complicated temperature variation at altitude and can be calculated from it since isolated density and pressure effects on the speed of sound cancel each other." - further detailed in the main article "pressure and density (also proportional to pressure) have equal but opposite effects on the speed of sound, and the two contributions cancel out exactly" It also shows and describes how "The speed of sound increases with height in two regions of the stratosphere and thermosphere, due to heating effects in these regions." en.wikipedia.org/wiki/Speed_of_sound#/media/File:Comparison_US_standard_atmosphere_1962.svg Comparing to railway tracks is different, as it's a different material, not the same material at different density/temperature. en.wikipedia.org/wiki/Speed_of_sound

[@erictaylor5462]

You controls freeze up, your plane buffets wildly, and you disintegrate. Not all that complex.

[@MadaffacaFacca]

shut up and take my money Falcon

[@tomdickens7856]

I hear voices in the background.

[@patjohn775]

You forgot to take your meds

[@DoubleMonoLR]

Radio traffic at about 20:14, and occasionally another pilot, otherwise nothing.

[@trainhopperz]

He said aileron snatch

[@DoubleMonoLR]

It's the correct term, just because snatch can also mean something crude is kind of juvenile. Many words also have alternate crude meanings.

[@rogerbivins9144]

Cancel my SR-22 order please.

[@karlplaysdrums]

No falcon aircraft has ever made a mistake, or distorted information. We are, for all practical definitions of the words, foolproof, and incapable of errer. Error.

[@tree356]

Makes me miss today’s video technology.

[@DoubleMonoLR]

It's a 240p upload, it would barely make any difference if the original was even shot on 35mm or 4k. Analog tv broadcasts were much clearer, and even an average VHS was better than this.

[@12345fowler]

Give me a Falcon 10 plsssssss Nice toy

[@importantjohn]

If it doesn't go over Mach 1 I'm not interested, sorry.

[@AbdulRahman-px7sp]

no

[@williamshafer3199]

where U at with that Abdul?

[@dlvox7415]

This is old. All the gauges are analog.

[@HEDGE1011]

That doesn’t make the data invalid.

[@DoubleMonoLR]

Transparently it's old, rather a pointless statement. It being 'old' makes little difference, a lot of aircraft still in use are also old anyway.

[@josephliptak]

I'm not buying it, too risky

[@feetgoaroundfullflapsC]

Im not buying you. You are full of shtt...

[@jhutch1470]

What a wonderful commercial for a certain aircraft. This was not for learning purposes at all. What a waste of time.

[@mastrfreakincylinder1903]

learning is always a subjective experience don't ya know

[@DoubleMonoLR]

Except that the information in the video is entirely accurate, 'what a waste of time'.