Air Speed

CR4 Home | New Technologies & Research | New Technologies & Research

27 comments

Rate

B. R. PATEL Active Contributor Join Date: Apr 2008 Location: Valsad, Gujarat, India Posts: 15	Air Speed 09/22/2012 11:38 AM
	I want to know maximum speed of air, My question is that " if one rocket flying in the sky with huge speed and only one window in tail side Air not available inside of Rocket means no air pressure. If it is flying slow, the out side air running behind the rocket and entered in tail window. . But if Rocket's speed is too high, than what happen? What will the speed of air. Whether air can enter in the rocket?. This question is for my internal experiments. Please kind comments is expected. __________________ My aim is findout the new technology for energy where no fuel, required. ,
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Join CR4, The Engineer's Place for News and Discussion!

Good Answers:

These comments received enough positive votes to make them "good answers".

#7 "Re: Air Speed" by TrevorM on 09/23/2012 3:27 AM (score 3)
#20 "Re: Air Speed" by TrevorM on 09/24/2012 4:30 AM (score 2)

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

#1 "Re: Air speed" by lyn on 09/22/2012 11:41 AM (score 1)

lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Air speed 09/22/2012 11:41 AM
	No, air will not enter rocket. Differential pressure will evacuate all the air from inside the rocket. Slow down. Venturi effect - Wikipedia, the free encyclopedia
	Register to Reply Score 1 for Good Answer

No more "Almost" Good Answers.

TerraMan Power-User Join Date: Nov 2011 Posts: 473 Good Answers: 13	#3 In reply to #1 Re: Air speed 09/22/2012 11:20 PM
	"Slow down"...You always crack me up!
	Register to Reply

B. R. PATEL Active Contributor Join Date: Apr 2008 Location: Valsad, Gujarat, India Posts: 15	#4 In reply to #1 Re: Air speed 09/23/2012 12:44 AM
	Thanks for kind comments. Sir, as per your answer, air will never enter inside of Rocket / container. It means outside air pressure will continue for entry, and this pressure I want to utilized for energy. I have make exprement and develop this situation. I seen that out side air russed forcely towards to enter hole of container. But the system could not run fast as want, for required air pressure. I want to create difference of air pressure between entry and out, and this difference help to generating energy. B.R. PATEL __________________ My aim is findout the new technology for energy where no fuel, required. ,
	Register to Reply Off Topic (Score 5)

bioramani Guru Join Date: Jun 2009 Location: Bangalore, India Posts: 725 Good Answers: 24	#8 In reply to #4 Re: Air speed 09/23/2012 5:19 AM
	Rockets are best suited for use in the vacuum of outer space. The streamlining of the rocket is to ensure that the drag is minimal when the rocket is operating inside the atmosphere. Any energy drawn using this differential pressure will have to come out of the energy of the rocket itself. __________________ bioramani
	Register to Reply Off Topic (Score 5)

Anonymous Hero Guru Join Date: May 2006 Location: The 'Space Coast', USA Posts: 11119 Good Answers: 918	#18 In reply to #8 Re: Air speed 09/23/2012 9:52 PM
	Exactly. The Law of Thermodynamics assures us that you are not going to get something for nothing. This is why real spacecraft use APUs to generate on-board energy. NASA is not a second rate organization. If there was a better way to do this they would have employed it. The differential pressure idea will not work any more than putting a windmill on the nose will, in fact it will work even worse.
	Register to Reply Off Topic (Score 5)

aurizon Guru Join Date: Jun 2006 Location: Toronto Posts: 3968 Good Answers: 120	#2 Re: Air Speed 09/22/2012 10:28 PM
	to samle the speed of air they use a pitot tube, which is a venturi stuck into the air stream to go to an analog air speed meter. They are now digitized. The pressure gradient over the aircraft will vary from place to place, some will have a high pressure and some a lower. If a high pressure area is vented to the interior the interior will increase in pressure, if negative, will decrease. Careful attention is paid to this in design of aircraft, especially those that are pressurized for passenger comfort. Pitot tube __________________ Per Ardua Ad Astra
	Register to Reply

B. R. PATEL Active Contributor Join Date: Apr 2008 Location: Valsad, Gujarat, India Posts: 15	#5 In reply to #2 Re: Air Speed 09/23/2012 12:46 AM
	Thanks Sir, for kind comments. __________________ My aim is findout the new technology for energy where no fuel, required. ,
	Register to Reply Off Topic (Score 5)

phph001 Guru Join Date: Oct 2009 Posts: 1460 Good Answers: 30	#10 In reply to #2 Re: Air Speed 09/23/2012 9:05 AM
	"pitot tube, which is a venturi stuck into the air stream to go to an analog air speed meter. " Errm.... not exactly. A pitot tube connects with one side of a differential pressure gauge; the other side connects to a reference pressure point. The pressure difference then relates to speed. A venturi involves the expansion of gas leaving a restriction.
	Register to Reply

Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#6 Re: Air Speed 09/23/2012 1:11 AM
	You will have a problem with this, in that the energy required to get (and keep) the rocket at speed is greater than the energy that can be derived from the pressure difference. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
	Register to Reply

TrevorM Power-User Join Date: Jun 2009 Location: Australia Posts: 277 Good Answers: 45	#7 Re: Air Speed 09/23/2012 3:27 AM
	I suspect Lyn is wrong.... if you look at the NASA material at the link http://www.grc.nasa.gov/WWW/BGH/normal.html....then I think you will find that (in simple terms) air pressure well ahead of the rocket will be at normal temperature and pressure, in the shock wave the temperature and pressure will be very high, and behind the narrow shock wave itself, the air will still be higher than std temp and pressure, except for a narrow cone at the rear of the rocket. Inside that cone the the temp and pressure might be somewhere nearer normal - and it is provided by expansion of air out of the high pressure/temp area/zone behind the shock wave proper. It is obvious that there has to be "some air" over the wings and behind the shock wave else planes could not fly at well above supersonic as they do (if they are powerful enough)
	Register to Reply Good Answer (Score 3)

Go to Next Good Answer

JNB Guru Join Date: Aug 2012 Posts: 1071 Good Answers: 92	#9 Re: Air Speed 09/23/2012 7:38 AM
	1,913,885 mph. See http://www.thelivingmoon.com/41pegasus/02files/Speed_of_Earth.html. Add 100 mph for the jetstream. You asked.
	Register to Reply

CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#11 Re: Air Speed 09/23/2012 9:36 AM
	I just invented a Warp Speed spaceship....does anyone want to invest in it?! __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
	Register to Reply

aurizon Guru Join Date: Jun 2006 Location: Toronto Posts: 3968 Good Answers: 120	#12 In reply to #11 Re: Air Speed 09/23/2012 9:41 AM
	I just invented a Warp Speed spaceship....does anyone want to invest in it?! All those with warped minds will send you some virtual money... __________________ Per Ardua Ad Astra
	Register to Reply

CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#13 In reply to #12 Re: Air Speed 09/23/2012 10:08 AM
	Do you mean the FIAT $$$$ that the US Treasury is printing? No Gold to back up those dollar bills........ __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
	Register to Reply

ci139 Guru Join Date: Feb 2012 Posts: 595	#16 In reply to #13 Re: Air Speed 09/23/2012 2:40 PM
	what i remember about this phenom. is that if (ever) u get close to c there will be "wall" behind a ?compressed timespace layer? ... in .. front of your ?? . . . . . . *wrap-speeder . . . it's not the trivial "inter-space" entry . . . . . . . . . but the wall can be entered by ? revibing your thing* ? somehow . . . . . . ?? need to modulate to . . . . ?? not this timespace . . . . . . . . . . . . 4 example the clearvoyant (namely a 5D --)-E fork or a spoon or other metallics is actually in 5D far off "here" what you touch is it's projection . . . . . . <- it's all not so simple -- coz you don't DO stuff in where there is no time - rather you - relate there "around" __________________ ci139
	Register to Reply Score 2 for Off Topic

ci139 Guru Join Date: Feb 2012 Posts: 595	#15 In reply to #11 Re: Air Speed 09/23/2012 2:14 PM
	Wing Commander ... ... what you know about the 5D navigation 1 thing is to get your device to "" "wormhole" "" another is to 5D navigate it to somewhere so your crew survives the exit and the time shock there another is to keep it travelling not fuzz-integrating into multitude of times -- another words not getting lost there -- it's not about building the ?hyper-drive? -- it's about surviving such ... <- you write the man. -- i might buy 1 __________________ ci139
	Register to Reply Score 2 for Off Topic

CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#17 In reply to #15 Re: Air Speed 09/23/2012 3:58 PM
	You DO know that I was kidding around about the Warp Speed invention, correct? __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
	Register to Reply

ci139 Guru Join Date: Feb 2012 Posts: 595	#22 In reply to #17 Re: Air Speed 09/24/2012 5:29 AM
	what i do know is that -- the spirits use open minded people "to define "their own GO!"" -- so likely my past supersoul required the information (putting it in public usually increses the likelyhood of otherwise unlikely evt.s) keep it Up! __________________ ci139
	Register to Reply Score 2 for Off Topic

Stedou73ish Guru Join Date: Apr 2008 Location: 38th Parallel Posts: 750 Good Answers: 19	#24 In reply to #22 Re: Air Speed 09/25/2012 12:19 PM
	So where did you find these Spirits.........Jack Daniels or Jim Beam university? __________________ To be or not to be........ok that's a trick question.
	Register to Reply

ci139 Guru Join Date: Feb 2012 Posts: 595	#25 In reply to #24 Re: Air Speed 09/30/2012 6:03 AM
	well it'sss ... (WTF is it) ... 2012.9.30 Sunday 56200MJD so we have to rewind to ... apx. 1978.8.20 Sunday 43740MJD (/!\/!\/!\12460 days ago) and we enter the /!\/!\/!\anomaly zone so (the next you aint gonna like - i gess - it's stuped to read) long story short in a walk with famyly i generalized the given answer to the rest of the nature (such as everyone's their parents love (woucy wow)) so the child can have some realizations as high emotional booster - and that one - caused sorta micro-enlightening anyway i experienced some time halt was pulled up^(*) to 5/6D and a witty old man called "5" (5D level master something) poped out claiming that hes the Love ... ... ... he's much likely the then spirit of the Man (<- so it's a here time-still & back(-behind)-above-around-here 5D the information is from) ... ... so we'd have the "panic" situation since then as ... the level masters are usually programmed to carry out some ancient missions ... while they ... keep their (spirit's ??release?? time's) philosopy/experience(up to then) ... i sorta ended up his competitor - i gess he's the same as granpa (The mountain east of Salt Lake City and there folkus likely under he's dominion (there's) information cliplets they moved SW some time ago ... anyway the mountains are descent timeships or "draggons") so the from is quite likely ... quite likely ^(*) __________________ ci139
	Register to Reply Score 2 for Off Topic

ci139 Guru Join Date: Feb 2012 Posts: 595	#26 In reply to #24 Re: Air Speed 09/30/2012 6:47 AM
	there's some links from around the Dan Winters ?? Hart Monitoring programm Leading Edge International Research Group // -- should be acceptable std. relese to the topic of your interest i personally like her coz she's quite bright kid (busy bee on THE field (havent seen since 2000CE -- i'm actually tech. minded -- and that's why i'm here in this CR4 4'um )) ... shure this -- few of the folkus still ticking after Spirit web went down and my personal favorite http://www.internetarchaeology.org/saufor/index.html -- it's the design -- the res. pointed is vast -- ther's likely 1..2 relevant links -- ain't gonna re-dig-through to point out whitch exactly (the (i gess the word's) esoteric data is mind(scapes') ®-ated - the 4/5/6D is not always discreet/linear-/continuos t.m. the event's of higger NRG-tic might re-combine to next different state - but they once occurred there -- there might be some references with not very adequat concept translation -- you must cobine multiple references to grasp the go -- well it's the g.d. headace ...) __________________ ci139
	Register to Reply Off Topic (Score 3)

CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#14 Re: Air Speed 09/23/2012 10:10 AM
	I forgot to add that it's a Gov't sponsored PONZI SCHEME....the biggest one ever perpetrated. Nero fiddles away as Rome burns......... __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
	Register to Reply

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#19 Re: Air Speed 09/24/2012 3:45 AM
	The maximum speed of air is Mach 1.00. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
	Register to Reply

TrevorM Power-User Join Date: Jun 2009 Location: Australia Posts: 277 Good Answers: 45	#20 In reply to #19 Re: Air Speed 09/24/2012 4:30 AM
	So then I guess this extract from Wikipedia is wrong !!! I think not - note the reference to Mach 13 at the bottom. High-speed flow in a channel As a flow in a channel becomes supersonic, one significant change takes place. The conservation of mass flow rate leads one to expect that contracting the flow channel would increase the flow speed (i.e. making the channel narrower results in faster air flow) and at subsonic speeds this holds true. However, once the flow becomes supersonic, the relationship of flow area and speed is reversed: expanding the channel actually increases the speed. The obvious result is that in order to accelerate a flow to supersonic, one needs a convergent-divergent nozzle, where the converging section accelerates the flow to sonic speeds, and the diverging section continues the acceleration. Such nozzles are called de Laval nozzles and in extreme cases they are able to reach hypersonic speeds (Mach 13 (9,896 mph; 15,926 km/h) at 20°C).
	Register to Reply Good Answer (Score 2)

No more Good Answers. Go to first "Almost" Good Answer

ci139 Guru Join Date: Feb 2012 Posts: 595	#21 In reply to #20 Re: Air Speed 09/24/2012 5:11 AM
	// * * * -- the phenomena works smth. like ??? F.(i must restore it now . . .) . . . it's like leaded gas only the ?Fe3+? causes a secondary combustion some 5m away from exhaust (designed molecule primary cbst throws & polarises the fuel off the jet - secondary causes the spring effect -- the Fe3+ is pointing away from rocket ) 1. 'ren't the signifficant numbers (-½,(-¼,)),0,2,1 ... the 13's just lossy property repeat ;Y 2. about jet propellants:: there should be some polarised metallogenic *combustion that'd keep the jet stream narrow and it'd thus act as a long spring some 60m..350m behind the axhaust F;i ... any ideas anyone 3. is it perhaps possible to "define" a tail of a roket that'd cause the vacum to form infront of the rear window __________________ ci139
	Register to Reply Score 2 for Off Topic

CaptMoosie Guru Join Date: May 2009 Location: Red Hook, New York (Mid-Hudson River Valley) Posts: 4362 Good Answers: 179	#23 In reply to #20 Re: Air Speed 09/24/2012 8:42 AM
	Good answer Trevor. GA! This is what happens in Hypersonic wind tunnels!!!! Anyone every been to NASA's Ames Research Center???? __________________ "Veni, Vidi, Vici"; hendiatris attributed to Gaius Julius Caesar, 47 B.C.
	Register to Reply

129CBRider Guru Join Date: Jun 2010 Posts: 989 Good Answers: 14	#27 Re: Air Speed 10/03/2012 11:25 PM
	I've noticed this same dual venturi effect while shooting a stream of water between my two front teeth.
	Register to Reply

Good Answers:

These comments received enough positive votes to make them "good answers".

#7 "Re: Air Speed" by TrevorM on 09/23/2012 3:27 AM (score 3)
#20 "Re: Air Speed" by TrevorM on 09/24/2012 4:30 AM (score 2)

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

#1 "Re: Air speed" by lyn on 09/22/2012 11:41 AM (score 1)

Copy to Clipboard

Users who posted comments:

129CBRider (1); Anonymous Hero (1); aurizon (2); B. R. PATEL (2); bioramani (1); CaptMoosie (5); ci139 (6); JNB (1); lyn (1); phph001 (1); PWSlack (1); Stedou73ish (1); TerraMan (1); Tornado (1); TrevorM (2)

	Got Something to Say?
	Ask a Question Start a Discussion

	Search this Forum
	New Technologies & Research: Go

CR4 Sections

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (175 right now) Show Members

Comments Format:

Subscribe to Discussion:

Rating Vote:

Good Answers:

"Almost" Good Answers:

Re: Air speed

Re: Air speed

Re: Air speed

Re: Air speed

Re: Air speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Re: Air Speed

Good Answers:

"Almost" Good Answers:

Users who posted comments:

Got Something to Say?

Search this Forum

CR4 Sections

Site Directories