Bloodhound LSR Thread As Requested...

[Krikkit]

triggerhappy21 said:

Arnold Cunningham said:

Exceeding 800 next year and then 1000 in 2021, IIRC.

Superb, good to know thanks.

They had an interview on BBCs Inside Science the other day where they only mentioned 'exceeding 800mph' and again in the news today. Made me question whether they downgraded target since SSC - LSR transition.

I would guess they're trying not to commit too early if they're not 100% confident in the Nammo rockets working and being affordable... Or perhaps the new owners have said the last tranche of funding won't come until they've hit that target of course.

[Oberon]

Anybody know what's happening on the Pan today? Marc?

[Warby80]

Oberon said:

Anybody know what's happening on the Pan today? Marc?

Judging by facebook updates, the final stages of putting the car back together.

Maybe runs tomorrow hopefully.

[Arnold Cunningham]

Here's a headf**k I hadn't thought about. At 1000mph, will the car will be silent as it goes past, until the sonic boom catches up?

[Oberon]

Looking at the "Cockpit Tour" video it appears that the magnificent Rolex chronometer and speedometer, originally situated left and right of the centre screen have been replaced by digital instruments. Also I see no Rolex logo among the others on the body. Could it be that Rolex have withdrawn their sponsorship? Anybody shed any light on this?

[Mave]

Arnold Cunningham said:

Here's a headf**k I hadn't thought about. At 1000mph, will the car will be silent as it goes past, until the sonic boom catches up?

Yep.
The shock wave propagates from the nose and is straight at Mach 1 (ie if you were standing to the side of the car it would hit you at the same time the nose went past you) and then angles further back as the Mach number increases (to about 30degrees at Mach 2 for example) to form what looks like in arrow from above. So the further away you are from the path of the car, the later the shock wave reaches use; not because of the speed of the shock wave, but because of the geometry.

[Zad]

Only if the vehicle had been travelling at supersonic speed for some time - and this is a car making a brief supersonic excursion, not an aircraft sustaining >M1.0 Depending on observer location and vehicle acceleration, it is possible that even before the vehicle passes you, you will hear sound which was generated when the car was sub-Mach 1 and propagated ahead of the vehicle. Obviously the boom will be delayed though.

[Mave]

The question was about travelling at 1000 mph, which means it will have been travelling at more than Mach 1 for quite a few seconds..

Edited by Mave on Tuesday 12th November 21:16

[Arnold Cunningham]

Yes, I chose the 1000mph number specifically so that the shock wave is angled back more, and therefore at a little distance, the effect is more pronounced.
Or even as an observer at the far end of the track - they'll hear it start and throttle up - I think it'll disappear into silence until "bang" it is very noisily back again.

There's that fabulous photo of Thrust SSC with the sonic boom very visible on the track surface in the sun

Finally, @Zad - I think it's a pure function speed, not of time spent at that speed - although am right on the edge of my knowledge now so may be wrong - I'm better at fluid dynamics than aero.

[wst]

Krikkit said:

triggerhappy21 said:

Arnold Cunningham said:

Exceeding 800 next year and then 1000 in 2021, IIRC.

Superb, good to know thanks.

They had an interview on BBCs Inside Science the other day where they only mentioned 'exceeding 800mph' and again in the news today. Made me question whether they downgraded target since SSC - LSR transition.

I would guess they're trying not to commit too early if they're not 100% confident in the Nammo rockets working and being affordable... Or perhaps the new owners have said the last tranche of funding won't come until they've hit that target of course.

"After setting the new world land speed record, the team will make a range of assessments before deciding whether to pursue the 1,000mph (1,609km/h) speed that the car has ultimately been designed for. Key among these factors are whether the technical requirements are considered feasible (which we’ll have clearer view of having actually run the car at supersonic speeds), whether sponsors want to be involved again and, of course, whether it’s considered safe."

Horse's mouth

[JonChalk]

Going out soon:

https://mobile.twitter.com/Bloodhound_LSR/status/1...

[Mave]

I didn't see it on the twitter feed but I assume they'll be checking the fix for the engine bay overheat warning as well; fingers crossed!

[Warby80]

From Facebook this morning:

Successful 200mph run. However, post run checks revealed a damaged sensor from the engine bay overheat issue. This will be fixed back at base and we’ll be out for a fast run tomorrow…

[Arnold Cunningham]

If it was an Audi, it'd be engine out again to fix the sensor.

[CallMeLegend]

Another systems issue prevented start this morning, the DECU didn't send the start signal to the engine, if the DECU has to come out, from memory that's upper chassis off again.

[slartibartfast]

Oberon said:

Looking at the "Cockpit Tour" video it appears that the magnificent Rolex chronometer and speedometer, originally situated left and right of the centre screen have been replaced by digital instruments. Also I see no Rolex logo among the others on the body. Could it be that Rolex have withdrawn their sponsorship? Anybody shed any light on this?

interesting!...
anyone know the answer?

[CallMeLegend]

slartibartfast said:

Oberon said:

Looking at the "Cockpit Tour" video it appears that the magnificent Rolex chronometer and speedometer, originally situated left and right of the centre screen have been replaced by digital instruments. Also I see no Rolex logo among the others on the body. Could it be that Rolex have withdrawn their sponsorship? Anybody shed any light on this?

interesting!...
anyone know the answer?

I'm not certain they are involved any more.

[Zirconium]

CallMeLegend said:

slartibartfast said:

Oberon said:

Looking at the "Cockpit Tour" video it appears that the magnificent Rolex chronometer and speedometer, originally situated left and right of the centre screen have been replaced by digital instruments. Also I see no Rolex logo among the others on the body. Could it be that Rolex have withdrawn their sponsorship? Anybody shed any light on this?

interesting!...
anyone know the answer?

I'm not certain they are involved any more.

Can you tell us what happened to the Geely sponsorship, or is that a story that will have to wait for another day?

[Oberon]

Over the years several sponsors have pulled out including some major ones such as Jaguar and Cosworth, but news of these events, whilst probably not actively suppressed is rarely reported with due candour. The same applies to the near-collapse of the project - which nobody knew about for months while we all sat begging our computer screens for information. I find this one of the most disappointing issues of this project which claims to be so transparent.

eg "Here's our blueprints, we're not being secretive about our technology"

I hate to sound a negative note, so apologies. I have been an avid follower of Bloodhound ever since the project was announced(in 2008?) and wish them every success. I WILL be at Hakskeen to hear the sonic boom next year.

[CallMeLegend]

Zirconium said:

CallMeLegend said:

slartibartfast said:

Oberon said:

Looking at the "Cockpit Tour" video it appears that the magnificent Rolex chronometer and speedometer, originally situated left and right of the centre screen have been replaced by digital instruments. Also I see no Rolex logo among the others on the body. Could it be that Rolex have withdrawn their sponsorship? Anybody shed any light on this?

interesting!...
anyone know the answer?

I'm not certain they are involved any more.

Can you tell us what happened to the Geely sponsorship, or is that a story that will have to wait for another day?

I believe it ran it's course & wasn't renewed.