Bloodhound LSR Thread As Requested...

Bloodhound LSR Thread As Requested...

Author
Discussion

E24man

6,654 posts

178 months

Monday 5th December 2016
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Thank you IN5IGHT.

snotrag

14,446 posts

210 months

Thursday 8th December 2016
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Bloodhound lead engineer said:
“The first thing for the car,” said Chapman, “is to inspire a generation of children....

...while addressing a school assembly, someone asked, ‘if it was vertically, how high would it could go?’

“I didn’t know the answer,” said Chapman, “so when it came to their physics class we sat down and worked it out using Newton’s Laws. It was the first time they’d realised that equations were good for finding stuff out.”
yes Excellent work guys - this is important and something I feel strongly about (As a relatively young engineer, with not that many people from the next generation following me)

Rest of interview here -

http://www.eurekamagazine.co.uk/design-engineering...

mcdjl

5,438 posts

194 months

Thursday 8th December 2016
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snotrag said:
Bloodhound lead engineer said:
“The first thing for the car,” said Chapman, “is to inspire a generation of children....

...while addressing a school assembly, someone asked, ‘if it was vertically, how high would it could go?’

“I didn’t know the answer,” said Chapman, “so when it came to their physics class we sat down and worked it out using Newton’s Laws. It was the first time they’d realised that equations were good for finding stuff out.”
yes Excellent work guys - this is important and something I feel strongly about (As a relatively young engineer, with not that many people from the next generation following me)

Rest of interview here -

http://www.eurekamagazine.co.uk/design-engineering...
I just read that...he didn't answer the question though!

Zad

12,695 posts

235 months

Thursday 8th December 2016
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Funnily enough, I've just been reading Eureka magazine too biggrin

Care to give us a few numbers so we can work it out? Might make for an interesting Kerbal Space Program machine.


IN51GHT

Original Poster:

8,777 posts

209 months

Friday 9th December 2016
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Zad said:
Funnily enough, I've just been reading Eureka magazine too biggrin

Care to give us a few numbers so we can work it out? Might make for an interesting Kerbal Space Program machine.
Mass = 7800kg
EJ200 thrust approx 90kN
Nammo momo propellant rocket thrust for year one IRO 45kN

mcdjl

5,438 posts

194 months

Friday 9th December 2016
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IN51GHT said:
Mass = 7800kg
EJ200 thrust approx 90kN
Nammo momo propellant rocket thrust for year one IRO 45kN
Got my cufflinks through the post cheers, 68/100

Greg_D

6,542 posts

245 months

Friday 9th December 2016
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IN51GHT said:
Mass = 7800kg
EJ200 thrust approx 90kN
Nammo momo propellant rocket thrust for year one IRO 45kN
for the simple amongst us, is that ample for the vehicle to theoretically push itself straight up in the air?

mcdjl

5,438 posts

194 months

Friday 9th December 2016
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Greg_D said:
for the simple amongst us, is that ample for the vehicle to theoretically push itself straight up in the air?
1N-9.81kg
Weight=7800/9.81=795N
Vs 90,000+45,000N=135,000n
Thrust/weight= 135,000/795=169 and at that point despite being a mechanical engineer my physics fails me and i can't tell how fast it would go up. Except that the up force on each Kg (169) is more than the downforce (gravity 9.81) so I'm fairly certain it'll go up.

spikeyhead

17,223 posts

196 months

Friday 9th December 2016
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mcdjl said:
Greg_D said:
for the simple amongst us, is that ample for the vehicle to theoretically push itself straight up in the air?
1N-9.81kg
Weight=7800/9.81=795N
Vs 90,000+45,000N=135,000n
Thrust/weight= 135,000/795=169 and at that point despite being a mechanical engineer my physics fails me and i can't tell how fast it would go up. Except that the up force on each Kg (169) is more than the downforce (gravity 9.81) so I'm fairly certain it'll go up.
Assuming that the rest of your maths is right, then the upforce is greater than g by a factor of about 17, so it will accelerate at 17g, which is faster than very very quick.

mcdjl

5,438 posts

194 months

Friday 9th December 2016
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spikeyhead said:
mcdjl said:
Greg_D said:
for the simple amongst us, is that ample for the vehicle to theoretically push itself straight up in the air?
1N-9.81kg
Weight=7800/9.81=795N
Vs 90,000+45,000N=135,000n
Thrust/weight= 135,000/795=169 and at that point despite being a mechanical engineer my physics fails me and i can't tell how fast it would go up. Except that the up force on each Kg (169) is more than the downforce (gravity 9.81) so I'm fairly certain it'll go up.
Assuming that the rest of your maths is right, then the upforce is greater than g by a factor of about 17, so it will accelerate at 17g, which is faster than very very quick.
Now you put it like that I'm fairly certain my maths is wrong, or missing something.

Ian974

2,927 posts

198 months

Friday 9th December 2016
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N/kg is wrong way round.
1 kg = 9.81N smile

I'm working out 58kN ish upwards force, but it's a while since I've done any acceleration calculations!

E24man

6,654 posts

178 months

Friday 9th December 2016
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Thanks for the cufflinks, 45/100.

Silver Smudger

3,292 posts

166 months

Friday 9th December 2016
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E24man said:
Thank you IN5IGHT.
Yes, thank you very much - Recieved today and already wrapped

mcdjl

5,438 posts

194 months

Friday 9th December 2016
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Ian974 said:
N/kg is wrong way round.
1 kg = 9.81N smile

I'm working out 58kN ish upwards force, but it's a while since I've done any acceleration calculations!
So 1.7 then...now it will go up but much slower. That seems more reasonable.

tiggerboy0301

7 posts

87 months

Friday 9th December 2016
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Breaking my vow of silence on this thread to ask if there are still any cufflinks left for sale?

Silent1

19,761 posts

234 months

Saturday 10th December 2016
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tiggerboy0301 said:
Breaking my vow of silence on this thread to ask if there are still any cufflinks left for sale?
Bloody short vow of silence considering you joined on the 5th of this month?!

robinessex

11,046 posts

180 months

Saturday 10th December 2016
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mcdjl said:
Ian974 said:
N/kg is wrong way round.
1 kg = 9.81N smile

I'm working out 58kN ish upwards force, but it's a while since I've done any acceleration calculations!
So 1.7 then...now it will go up but much slower. That seems more reasonable.
It will keep accelerating.

tiggerboy0301

7 posts

87 months

Saturday 10th December 2016
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Silent1 said:
Bloody short vow of silence considering you joined on the 5th of this month?!
Been lurking on this thread since pretty much the beginning, thank you insight for all the info. I don't usually join forums as I don't tend to have a lot to say! :-)

Howitzer

2,828 posts

215 months

Sunday 11th December 2016
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If there are any more Cufflinks for sale I would love a set for my dad.

Dave!

IN51GHT

Original Poster:

8,777 posts

209 months

Tuesday 13th December 2016
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So.....

How would one mark out the stripes on a supersonic car?????



Yep.....xmas tree beads!!!