Supersonic car targets 1,000mph

[Notebook]

Bloodhound LSR News

http://news.bbc.co.uk/1/hi/sci/tech/7685049.stm

N.

 

[simonpro]

Super. I remember being really excited by Thrust-2 when I was (much) younger! Good to see that they're still at it.

 

[Notebook]

Its good news, I did like the design of SSC, looked as if was goimg somewhere fast.

Just need the money now

Apart from the not-insubstantial in-kind support of the MoD in the loan of the EJ200s, Bloodhound is a private project that will need to raise some £10m in financing.

N.

 

[tblaxland]

According to that article, the car will get to 1,050mph in 40 sec. Unless my math has failed me, that is 15.5g! According to NASA, you could remain conscious but I don't know about hanging onto a steering wheel.

EDIT: Some better data at http://www.bloodhoundssc.com/adventure/the_record_run.cfm. That shows peak acceleration at just over 2g. That is also more consistent with the nominal thrust on the engines of 20,000lbs and 27,000lbs respectively. I guess the science editor was away from his desk for that article.

 

[Notebook]

It is a BBC technology article, so it won't have been researched...

I read elsewhere they are using a Falcon rocket, presumably not SpaceX?

From the Bloodhound web-site

In the middle of the BLOODHOUND SSC is the MCT V12 800 bhp race engine which doubles as our APU delivering hydraulic power as needed, starting the EJ200 and of course pumping the High Test Peroxide (HTP) through to the Falcon rocket. The pump has to move a ton of HTP through to the rocket catalyst in 22 seconds and at 1200 psi. The beauty of the hybrid rocket is that it uses a safe and green oxidiser in the shape of HTP and only burns its solid fuel as long as the HTP is flowing. Shut the HTP flow off and the rocket shuts down in safety. No emergency problems of having mechanically to jettison a burning solid fuel rocket or running the risk of an explosion from shutting down a bi-propellant rocket with horizontal combustion chambers

http://www.bloodhoundssc.com/car.cfm

N.

 

[cjp]

1000 miles per hour?! Wow. That's really fast for a car. Or a jet that doesn't take off.

 

[agentgonzo]

According to that article, the car will get to 1,050mph in 40 sec. Unless my math has failed me, that is 15.5g!

I think your maths has failed you.

I make it 1.2g on average


-----Posted Added-----

1000 miles per hour?! Wow. That's really fast for a car. Or a jet that doesn't take off.

The Thrust SSC was definitely just a jet that didn't take off. Probably the Thrust 2 also. I know with the ThrustSSC they had to put a lot of work keeping it stable, because if the nose pointed slightly up, it would just take off - even without wings.

When they examined the salt flats after the run, instead of finding tyre tracks on the ground from the wheels, they found a trench that had been ripped up under where the car went by the shock-wave.

 

[pete.dakota]

I make it 1.2g on average

That's an average for the entire 40s, though. According to this article, the car will use its jet engine to get to 350mph in 20s (0.8g), then fire an SRB to reach 1000mph in a further 20s (1.48g).


That really is

!

 

[simonpro]

According to that article, the car will get to 1,050mph in 40 sec. Unless my math has failed me, that is 15.5g! According to NASA, you could remain conscious but I don't know about hanging onto a steering wheel.

Remember that it's eyes-in acceleration not eyes-down. It is easily possible to remain fully concious and in control of whatever you're doing (provided you're strong) at 15g eyes-in.
Not that this will be reaching that, mind you.

Also remember that this is a BBC science/technology article and thus whoever wrote it will have as much experience in both science and technology as Fred Flintstone. I am honestly surprised the BBC science correspondants have mastered how to turn their computers on.


Oh, and thinking of what agentgonzo was saying, does anyone have that video of thrust SSC where you can see the mach-shockwave. That was an immensely powerful illustration of just how fast the thing was going!

 

[astrosammy]

Here you can't see it, but it's very loud:

 

[agentgonzo]

Here's an account by Andy Green (Thrust SSC pilot) about it. There's an aerial image where you can see the shockwave. No images of the 'ploughed trace', but he does mention it in the article.
http://mccabism.blogspot.com/2007/10/andy-green-and-thrust-ssc.html

 

[tblaxland]

I think your maths has failed you.

I make it 1.2g on average

Indeed it did. I was obviously too tired by that stage. :blush:

 

[Notebook]

Slight update

http://www.bloodhoundssc.com/news.cfm?widCall1=customWidgets.contentItem_show_1&cit_id=4531

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[Andy44]

1000 mph on the ground. Very impressive. And also very stupid. Just my opinion, of course, but any cat who survives this will have used up most of his 9 lives.

 

[insane_alien]

according to wolfram alpha the wheels will be doing 158.1 rotations per second (a fifth as fast as the fastest known pulsar)

the acceleration of the wheel rim will be greater than the acceleration of a bullet in a Beretta Model 92S-9mm at 444099m/s^2 thats 45270 g. i find it astounding that something could hold together uner that sort of stress.

 

[doggie015]

That's an average for the entire 40s, though. According to this article, the car will use its jet engine to get to 350mph in 20s (0.8g), then fire an SRB to reach 1000mph in a further 20s (1.48g).


That really is Ludicrous Speed!

that is NOTHING!

http://www.impactlab.com/2006/01/15/the-fastest-rocket-sled-on-earth/

EDIT: Video of the record-breaking run:

EDIT2: Top gear could learn a thing or two from these guys about kamikazi rockets

 

[MJR]

that is NOTHING!

http://www.impactlab.com/2006/01/15/the-fastest-rocket-sled-on-earth/

EDIT: Video of the record-breaking run: YouTube - HHSTT 6,453 mph land speed record

EDIT2: Top gear could learn a thing or two from these guys about kamikazi rockets

That just looks like a rocket though. We are talking about an actual person driving this car.

 

[doggie015]

I was referring to the sheer SPEED of the jolly thing! 6,453 MPH is not slow!

 

[simonpro]

I only realised a month or two ago who the chap that builds the engine is. He's well known for talking more than doing and also telling lies.
Seeing as how someone's life is at stake in this project hopefully that's not the case this time.

 

[RisingFury]

EDIT2: Top gear could learn a thing or two from these guys about kamikazi rockets

I think you got that backwards... I think these guys have something to learn about kamikaze rockets from Top gear