Jambo
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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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Bloke i know doesnt beleive that there are scramjets powered by hydregeon motor's capable of (unmanned) 5000mph or mach 7.
I was under the impression and im sure i read correctly that speed of sound (760mph) is equivilant to Mach 1 or thereabouts...
He is adament its mach4, which sounds like codswallop to me? Surely most jets are capable of around mach 2 as an average?
Can spacemonkeh or others please help.....
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Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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http://www.globalaircraft.org/qboard.htm
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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what he thinks the speed of sound is mach 4? thats rubbish
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Dean_W
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Registered: 13th Dec 05
Location: Downham Market, Norfolk
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A Mach is the speed of sound. i.e. Mach 2 = twice the speed of sound.
Sounds like this dude knows not much. Tell him to go watch discovery wings for a bit 
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Jambo
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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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Thought i wasnt mad. mach4 pish.
Thanks chaps
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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mach 1 is the speed of sound in any given medium. Through air at 20 degrees celsius, the speed of an object breaking the sound barrier is 765mph. Currently, Scramjets are the most efficient engine designs to carry an aircraft/rocket at hypersonic speed.
However, these are unmanned. the fastest an aircraft has travelled within the atmosphere is mach 6.7 in a North American X15.
The Saturn V rocket was capable of hitting 30,000kmh 
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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AMERICA, FUCK YEAH
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Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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Apollo 10 nearly went 40,000 km/h ( 25,000 mph )
[Edited on 02-01-2007 by Whittie]
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Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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39,897 km/h
24,790 mph
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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quote:
Originally posted by Cybermonkey
AMERICA, FUCK YEAH
http://upload.wikimedia.org/wikipedia/commons/a/ac/Apollo_11_launch.jpg
is that flag shopped in? thats cheesy as fuck
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Jambo
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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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id heard of an x15, you ever seen it? Its a fucking rocket with a seat Awesome 
Bloke has been told, he can GTF Blackbird is only mach 3 and thats at 100,000ft. Thinner air?
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Whittie
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Registered: 11th Aug 06
Location: North Wales Drives: BMW, Corsa & Fiat
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Fastest combat jet tracked at about Mach 3.2 ( 2,110 mph )
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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Mig31 Foxhound is capable of speeds in excess of mach3, but typically mach2.8. the SR71 Blackbird was a reconnaisance aircraft, not a combat aircraft, and capable of sustained mach3.3 in flight at 80,000ft.
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Dean_W
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Registered: 13th Dec 05
Location: Downham Market, Norfolk
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quote:
Originally posted by Cybermonkey
the fastest an aircraft has travelled within the atmosphere is mach 6.7 in a North American X15.
Bit of useless knowledge - The fastest recorded speed hit within the atmosphere was a speed of Mach 8.5 (6,416 mph). This was achieved by a four-stage rocket sled at Holloman Air Force Base on April 30, 2003. Basically a rocket on a train track. Albeit slightly smaller.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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that was on reee ree ree reecord breakers. re re record breakeerrrs
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Mad Moe
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Registered: 14th Jun 01
Location: Northumberland
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quote:
Originally posted by Cybermonkey
Mig31 Foxhound is capable of speeds in excess of mach3, but typically mach2.8. the SR71 Blackbird was a reconnaisance aircraft, not a combat aircraft, and capable of sustained mach3.3 in flight at 80,000ft.
Is it not the Mig 25 Foxbat that is capable of speeds in excess of Mach 3? I've never heard of the Mig 31 at those speeds
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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the MIG25 could not sustain Mach3+ flight without the engines overheating and destroying themselves. even approaching 2.8 was difficult for the 25. the 31 is superior in terms of speed, hence why it was its successor
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Russ
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Registered: 14th Mar 04
Location: Armchair
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i was under the impression that the "official" figure for the blackbirds top speed was very conservative
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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SR71 had a maximum sustained speed of mach3.3. it could not exceed this by any great amount, as the P&W's would start to suffer from heat-suppression.
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