Bloodhound LSR Thread As Requested...
Discussion
kiseca said:
fatbutt said:
CallMeLegend said:
I wouldn't, do you only fly in planes that are less than 5 years old.
No, but to be fair they aren't experimental. And I did say 'a little' worried, not full blown 100% worried 
I work in the marine environment where 5 years old means some gear is only held together with duct tape and tie wraps by that age.
but definitely you don't want to discover corrosion in a critical joint in a pile of wreckage only after the car has undergone a rapid unscheduled disassembly at 700mph..CraigyMc said:
kiseca said:
fatbutt said:
CallMeLegend said:
I wouldn't, do you only fly in planes that are less than 5 years old.
No, but to be fair they aren't experimental. And I did say 'a little' worried, not full blown 100% worried I work in the marine environment where 5 years old means some gear is only held together with duct tape and tie wraps by that age.
but definitely you don't want to discover corrosion in a critical joint in a pile of wreckage only after the car has undergone a rapid unscheduled disassembly at 700mph..If it was built to retake the record snatched by another country or team then they'd probably have the interest but building it just to beat their own record isn't interesting enough. They have already done the big one by breaking the sound barrier. They need a challenger and there isn't one.
robinessex said:
CraigyMc said:
kiseca said:
fatbutt said:
CallMeLegend said:
I wouldn't, do you only fly in planes that are less than 5 years old.
No, but to be fair they aren't experimental. And I did say 'a little' worried, not full blown 100% worried I work in the marine environment where 5 years old means some gear is only held together with duct tape and tie wraps by that age.
but definitely you don't want to discover corrosion in a critical joint in a pile of wreckage only after the car has undergone a rapid unscheduled disassembly at 700mph..My point about 700 to 800mph being different is that it means passing the sound barrier in this car, which is the bit where everything becomes a lot more serious in terms of testing limitations and so on. It's hard to simulate the interaction of the bow wave with the floor, for example. It's hard to model the wheels turning into (effectively) rudders.
FourWheelDrift said:
If it was built to retake the record snatched by another country or team then they'd probably have the interest but building it just to beat their own record isn't interesting enough. They have already done the big one by breaking the sound barrier. They need a challenger and there isn't one.
Rosco, if his car ever runs. It'll either be very fast, or crash, or both.FourWheelDrift said:
If it was built to retake the record snatched by another country or team then they'd probably have the interest but building it just to beat their own record isn't interesting enough. They have already done the big one by breaking the sound barrier. They need a challenger and there isn't one.
I said that earlier in the thread, and it turned out there are in fact two challengers. Neither of them seem to be getting much press (in the UK at least). One is Australian and I think the other one was American, but it may have been that lady with the Starfighter who lost her life in a run. I forget.As above - Rosco is still making slow but sure progress, I follow him on FB. I hope he gets it finished and runs it.
I don't know enough about the aerodynamics & design of it all to decide whether he's got a good design - albeit materially simpler than bloodhound, or if he's chancing it and will run remote until it's proven, as I recall breedlove had planned? It's certainly a very very different design ethos to bloodhound.
I don't know enough about the aerodynamics & design of it all to decide whether he's got a good design - albeit materially simpler than bloodhound, or if he's chancing it and will run remote until it's proven, as I recall breedlove had planned? It's certainly a very very different design ethos to bloodhound.
Arnie Cunningham said:
As above - Rosco is still making slow but sure progress, I follow him on FB. I hope he gets it finished and runs it.
I don't know enough about the aerodynamics & design of it all to decide whether he's got a good design - albeit materially simpler than bloodhound, or if he's chancing it and will run remote until it's proven, as I recall breedlove had planned? It's certainly a very very different design ethos to bloodhound.
I don't know if anyone does.I don't know enough about the aerodynamics & design of it all to decide whether he's got a good design - albeit materially simpler than bloodhound, or if he's chancing it and will run remote until it's proven, as I recall breedlove had planned? It's certainly a very very different design ethos to bloodhound.
Thrust SSC had a lot of computer modelling work done on it, but they also ran models on a rocket sled to see how the shockwaves would interact with the ground. Bloodhound had similar (lots of CFD). Ron Ayers spend a long time in military aerodynamics before doing these in his retired years.
I don't know how much of this type of work Rosco's had done; it's likely he's had some done, but I'd expect not to the degree of the British projects because of how the teams were being funded during development. Bloodhound had a lot of goodwill work done for free.
One thing that bothers me is the fuel Rosco's using. IWFNA and Turps aren't going to be pretty if there's a crash, even a minor one. At least with kerosene, you know where you stand.
With 2000kg of IWFNA on board, the best solution to a leak is -- to quote notable rocket fuel chemist John Drury Clark -- a good pair of running shoes.
The stuff is corrosive as hell too, so after one day out you're probably looking at renewing lots of fuel line plumbing.
CraigyMc said:
Arnie Cunningham said:
As above - Rosco is still making slow but sure progress, I follow him on FB. I hope he gets it finished and runs it.
I don't know enough about the aerodynamics & design of it all to decide whether he's got a good design - albeit materially simpler than bloodhound, or if he's chancing it and will run remote until it's proven, as I recall breedlove had planned? It's certainly a very very different design ethos to bloodhound.
I don't know if anyone does.I don't know enough about the aerodynamics & design of it all to decide whether he's got a good design - albeit materially simpler than bloodhound, or if he's chancing it and will run remote until it's proven, as I recall breedlove had planned? It's certainly a very very different design ethos to bloodhound.
Thrust SSC had a lot of computer modelling work done on it, but they also ran models on a rocket sled to see how the shockwaves would interact with the ground. Bloodhound had similar (lots of CFD). Ron Ayers spend a long time in military aerodynamics before doing these in his retired years.
I don't know how much of this type of work Rosco's had done; it's likely he's had some done, but I'd expect not to the degree of the British projects because of how the teams were being funded during development. Bloodhound had a lot of goodwill work done for free.
One thing that bothers me is the fuel Rosco's using. IWFNA and Turps aren't going to be pretty if there's a crash, even a minor one. At least with kerosene, you know where you stand.
With 2000kg of IWFNA on board, the best solution to a leak is -- to quote notable rocket fuel chemist John Drury Clark -- a good pair of running shoes.
The stuff is corrosive as hell too, so after one day out you're probably looking at renewing lots of fuel line plumbing.
Aussie Invader seems to have gone for a V-shaped chassis instead, to deflect the shockwave reflections away from the car. If I recall, Breedlove's supersonic effort... which was a very pretty car IMO.... tried the same thing, and the Thrust SSC guys thought Breedlove had got it wrong and they had got it right.
To me it looks like Thrust and Bloodhound have been designed to work interactively with the ground, and all the rest - including going back to the Blue Flame, which could have been a lot faster, they didn't use all the power - look like missiles intended to run less than a foot above the ground.
I don't know what's better but the successful experience seems to be with the Bloodhound team IMO.
I remember he had a fair bit of CFD work done a few years back to model the airflow and shockwaves, especially the nose section, IIRC he had a new nose section as a result of it.
Pure Nitric Acid as an oxidiser!!!
One bit I don't understand, but equally haven't asked him is with the multiple cylinders of fuel & oxidiser which will have a piston with compressed air behind them - what governs the fuel/oxidiser ratio - for example, if one piston is a bit stickier than another. I know he has some sensors to track piston position, but if a piston sticks, there's no mechanical connection governing the cylinders governing the ratio? So if the pistons move unequally, is is there anything that can be done about it (real time closed loop control...PID etc?)
Pure Nitric Acid as an oxidiser!!!
One bit I don't understand, but equally haven't asked him is with the multiple cylinders of fuel & oxidiser which will have a piston with compressed air behind them - what governs the fuel/oxidiser ratio - for example, if one piston is a bit stickier than another. I know he has some sensors to track piston position, but if a piston sticks, there's no mechanical connection governing the cylinders governing the ratio? So if the pistons move unequally, is is there anything that can be done about it (real time closed loop control...PID etc?)
Latest update - https://www.bloodhoundlsr.com/the-latest-bloodhoun...
kiseca said:
that sounds reasonably positive. I hope they get the cash.
I imagine the cash needed is quite a bit more than previously especially shipping fees to get all the equipment out to do an actual run. I just can’t see them getting enough money during/after a pandemic when they struggled before one. Stussy said:
Let’s hope they are a bit more proactive on the fund raising this time, I have no idea why they didn’t push it more in the past.
The Vulcan managed to raise plenty due to the publicity, they need to do the same
The difference with the Vulcan was it was the last surviving airworthy aircraft so got a huge following this is a car to beat a record that most people are not interested in or can’t see how it will help them in their lives. The Vulcan managed to raise plenty due to the publicity, they need to do the same
As a supporter of this and all his previous cars, I think it's a shame Richard Noble hadn't made it a bit more exciting for the public, two examples:
1) Thrust 2 looked simply brilliant in gold charging across the desert. LSR cars look best in gold.
2) The team has consistently said that it will be the 'safest' attempt ever. Great. That doesn't sell tickets. They absolutely should have kept quiet about the "safe" element of this.
1) Thrust 2 looked simply brilliant in gold charging across the desert. LSR cars look best in gold.
2) The team has consistently said that it will be the 'safest' attempt ever. Great. That doesn't sell tickets. They absolutely should have kept quiet about the "safe" element of this.
Largechris said:
As a supporter of this and all his previous cars, I think it's a shame Richard Noble hadn't made it a bit more exciting for the public, two examples:
1) Thrust 2 looked simply brilliant in gold charging across the desert. LSR cars look best in gold.
2) The team has consistently said that it will be the 'safest' attempt ever. Great. That doesn't sell tickets. They absolutely should have kept quiet about the "safe" element of this.
Richard Noble isn't involved any more though.1) Thrust 2 looked simply brilliant in gold charging across the desert. LSR cars look best in gold.
2) The team has consistently said that it will be the 'safest' attempt ever. Great. That doesn't sell tickets. They absolutely should have kept quiet about the "safe" element of this.
CraigyMc said:
Largechris said:
As a supporter of this and all his previous cars, I think it's a shame Richard Noble hadn't made it a bit more exciting for the public, two examples:
1) Thrust 2 looked simply brilliant in gold charging across the desert. LSR cars look best in gold.
2) The team has consistently said that it will be the 'safest' attempt ever. Great. That doesn't sell tickets. They absolutely should have kept quiet about the "safe" element of this.
Richard Noble isn't involved any more though.1) Thrust 2 looked simply brilliant in gold charging across the desert. LSR cars look best in gold.
2) The team has consistently said that it will be the 'safest' attempt ever. Great. That doesn't sell tickets. They absolutely should have kept quiet about the "safe" element of this.
Gassing Station | General Gassing | Top of Page | What's New | My Stuff