Supersonic Business Jet -- A Matter of When, Not If
45 replies, posted
Aeronautics, physics and space threads here always make me feel like a total moron. Most of the last few posts would make just as sense to me if they were written in hieroglyphics.
[QUOTE=Altimor;44402215]It's 1/2 mv^2 actually[/QUOTE]
it's been a while since high-school physics, but at least it's just a scalar. the proportions are the same.
Sounds like the wealthy businessman would be quite interested in the Carreidas 160.
[t]http://img72.xooimage.com/files/2/a/0/carreidas-160-2e49438.jpg[/t]
Ugh. So in addition to skipping all the gate rape and airline shenanigans, those rich pricks get to fly faster, too? It's almost like we've built a parallel universe where all the bullshit and inconvenience that real people have to deal with on a daily basis simply doesn't exist for people who have enough money.
[QUOTE=Bradyns;44405250]You also have to factor in drag, and density.
Not to mention, that the aircraft, along with the wading through air at high velocity, is also changing its altitude, so the high-stress regions change on the aircraft as it gets higher.
It's also getting lighter as the flight goes on, and the mass is still pretty important when it comes to this.
This is going to be a epic feat of engineering; wouldn't be surprised if we don't see a commercial one until 2024.[/QUOTE]
They also failed to mention relativistic effects. They should have gone with KE=[(pc)^2+(mc^2)^2]^(1/2)-mc^2 just to be safe.
[QUOTE=Falubii;44407144]They also failed to mention relativistic effects. They should have gone with KE=[(pc)^2+(mc^2)^2]^(1/2)-mc^2 just to be safe.[/QUOTE]
These speeds are nowhere those that are needed for them equations.
You might see some funky stuff from the aerodynamics, but nothing that exceeds what simple Newtonian equations can predict.
So, an airliner travels at Mach 0.75
A supersonic business jet goes Mach 1.5
It has a 1/20th the weight, 2x the velocity and 1/5th the energy.
Oh and 1/20th the fuel capacity (or maybe even a 1/40th as they don't make 12000km trips in one go).
Most of the energy in a plane crash would come from the hundred-thousand plus litres of jet fuel.
[QUOTE=Bradyns;44407491]These speeds are nowhere those that are needed for them equations.
You might see some funky stuff from the aerodynamics, but nothing that exceeds what simple Newtonian equations can predict.[/QUOTE]
Joke.
[QUOTE=Falubii;44409019]Joke.[/QUOTE]
When maths get involved in a tech thread, shit goes down. Beware
[QUOTE=BreenIsALie;44410040]When maths get involved in a tech thread, shit goes down. Beware[/QUOTE]
Not really. High school physics equations aren't such a big deal.
[QUOTE=Bradyns;44407491]These speeds are nowhere those that are needed for them equations.
You might see some funky stuff from the aerodynamics, but nothing that exceeds what simple Newtonian equations can predict.[/QUOTE]
Maybe that's enough precision for [I]engineers[/I]
Frankly I won't be happy until we have at least ad hoc corrections for quantum gravitational effects considered
[QUOTE=Bradyns;44407491]These speeds are nowhere those that are needed for them equations.
You might see some funky stuff from the aerodynamics, but nothing that exceeds what simple Newtonian equations can predict.[/QUOTE]
Now, I suck horribly at physics and only have a very loose grasp of it, but I'd be more concerned about the effects on the structure of the aircraft. From what I've heard, the SR-71 had some weird crap happen to its frame whenever it hit its stride, and the engineers accounted for that in the design.
Granted, this is no SR-71, but you're still going to see something. It might, be a problem, it might not. It's something to look into though.
[QUOTE=Falubii;44407144]They also failed to mention relativistic effects. They should have gone with KE=[(pc)^2+(mc^2)^2]^(1/2)-mc^2 just to be safe.[/QUOTE]
As I pronounced this in my head I realized my true destiny is to become a physics rapper named MC Squared. Thank you for this revelation.
[QUOTE=Bradyns;44407491]These speeds are nowhere those that are needed for them equations.
You might see some funky stuff from the aerodynamics, but nothing that exceeds what simple Newtonian equations can predict.[/QUOTE]
I bet you're fun at parties.
[QUOTE=OvB;44398155]When will we have suborbital business jets?
[I]"Hello this is the Los Angeles Offices. Meeting in Paris? In one hour? I'll be there in 30."[/I][/QUOTE]
I know I'm a bit late on this but there's tonnes of problems with that beyond engineering though, like if a plane goes to Paris from LA in 30 minutes how often do they run the flights? It's incredibly expensive to fly a normal jet, it'd be a nightmare operating something like that, and how many people need to suddenly be that far away and can't just fly first class with better planning? :v:
[QUOTE=pentium;44406355]Sounds like the wealthy businessman would be quite interested in the Carreidas 160.
[t]http://img72.xooimage.com/files/2/a/0/carreidas-160-2e49438.jpg[/t][/QUOTE]
Forget that thing, square windows and all.
[QUOTE=Altimor;44411807]As I pronounced this in my head I realized my true destiny is to become a physics rapper named MC Squared. Thank you for this revelation.
[/QUOTE]
Glad to help with your relativity revelation.
Sorry, you need to Log In to post a reply to this thread.