Crapping thread for the crappers and the crap. replied by CenturionMBT @ Wed, 26 Nov 2008 13:25:54 +0800

CenturionMBT — Wed, 26 Nov 2008 13:25:54 +0800

On second thoughts i will close this thread and make a new one.

Crapping thread for the crappers and the crap. replied by CenturionMBT @ Wed, 26 Nov 2008 13:21:50 +0800

CenturionMBT — Wed, 26 Nov 2008 13:21:50 +0800

ok my mistake. I wanted to write reccomend for banning but no space. Well, push the joke too far. Anyway, Lionnoisy , a few pointers i want to put across to you.

1. We have already specificly said no country bashing threads on the sticky. Whether you want to follow the guidelines or not is up to you. Dun blame us if your post get hijacked again.

2.Your method of presenting your stuff is absolutely disgusting. the information is incoherent, and often out of point. We can't understand what you are writing, we can't read what you are writing and we don't want to kill our braincells trying to read what you are writing.

3. When a person ask you a question, answer it. Don't start throwing rethorics and expect people to answer you. You are more of a damned pest then anything else.

4. Don't dig out stuff that had happened years ago. It is fine if you want to live in the past. We don't.

5. I will create a thread specifically for chatting and stuff, please keep the main forum clean.

that will be all.

Crapping thread for the crappers and the crap. replied by Gedanken @ Wed, 26 Nov 2008 12:59:15 +0800

Gedanken — Wed, 26 Nov 2008 12:59:15 +0800

Ah fuck it, don’t ban him – better the devil we know.

Having that one identity makes it really easy for me. The moment I see “lionnoisy”, I’ll know that it’s asinine drivel coming from an asswipe who never got over being laughed out of DIMIA.

Crapping thread for the crappers and the crap. replied by sgstars @ Wed, 26 Nov 2008 12:45:18 +0800

sgstars — Wed, 26 Nov 2008 12:45:18 +0800

Originally posted by lionnoisy:

do u need to tell

The Australian Secret Intelligence Service

that i am" anti--oz "by posting Australian main stream reports here--

straight cut and paste?Do a wet job on me!!

i wont bother them with such trival details.

LOL... whats a wet job ? i somehow, want to find out in a demented kinky sado-masochistic kinda way. if it involves u being tied to a 10 ton block of concrete with steel chains and being chucked into the great barrier reef shark infested waters, im more than glad to participate.

like they say in the mafiaso movies, Sleeping with the fishies.

but i digress, let me return to topic, which is, u havent posted anything positive on australia, its always

WEDGETAIL - BADDDDDD

ANZAC frigate -BADDDDDDDDD

RBS 70 AA defence system - BADDDDDDDDDDDDDDDDDd

Styer- BADDDDDDDDDDDDDDDDDDDDDDDd

COLLINS CLASS SUB - BAD BAD BAD BAD BAD BAD BAD BAD BAD BAD

JORNS - BADDDDDDDDD

no TANKER-BADDDDDDDDDDDDDDDDDDDDDDd

AUS NAVY MANPOWER ISSUES -BADDDDDDDDDDDDDDDDDDDDDDDD

u see, its ok to criticize something, so as long as you have a balanced viewpoint. I.E consider the other side of the coin. like the BENEFITS or POTENTIAL or CAPABILITY within a weapons system or platform.

u havent done that. period. thats why you are a bigot.

and the biggest irony here (which u cant appreciate) is that there is nothing academic about your approach to posting, or as your self-proclaimed "writing on forums is like writing thesis" assertion. write like that for a thesis, i bet my ass u'd get kicked out of whatsoever institution you are in.

your bigotry and anti-australia rants are so transparent, no-one needs to be superman to have X-ray vision to discern your idealogy.

Crapping thread for the crappers and the crap. replied by maurizio13 @ Wed, 26 Nov 2008 12:37:51 +0800

maurizio13 — Wed, 26 Nov 2008 12:37:51 +0800

lionnoisy so stewpig as not to know who changed the topic.

Crapping thread for the crappers and the crap. replied by FireIce @ Wed, 26 Nov 2008 12:35:45 +0800

FireIce — Wed, 26 Nov 2008 12:35:45 +0800

ban wat ban?
why i not informed?

Crapping thread for the crappers and the crap. replied by lionnoisy @ Wed, 26 Nov 2008 12:34:58 +0800

lionnoisy — Wed, 26 Nov 2008 12:34:58 +0800

Originally posted by sgstars:

i hope lionnoisy never ever considers going to australia on a vacation. ild send the australian customs department a link to this thread.

they'd immediatly arrest him and deport him to abu gharib or guantanamo.

do u need to tell

The Australian Secret Intelligence Service

that i am" anti--oz "by posting Australian main stream reports here--

straight cut and paste?Do a wet job on me!!

Crapping thread for the crappers and the crap. replied by lionnoisy @ Wed, 26 Nov 2008 12:30:54 +0800

lionnoisy — Wed, 26 Nov 2008 12:30:54 +0800

who did change the name of the thread so frequent?

I think it is the fourth time!!

current name:

Lionnoisy's one more anti australia post and i get banned

1.If is was changed by MOD,pl say so for the records.

2.If not by MOD or authorized persons,

is it considered hacking which is a criminal offfence.

Wow.u can say the server is not in Singapore.Good or bad lah!!

Crapping thread for the crappers and the crap. replied by sgstars @ Wed, 26 Nov 2008 11:32:40 +0800

sgstars — Wed, 26 Nov 2008 11:32:40 +0800

i hope lionnoisy never ever considers going to australia on a vacation. ild send the australian customs department a link to this thread.

they'd immediatly arrest him and deport him to abu gharib or guantanamo.

Crapping thread for the crappers and the crap. replied by lionnoisy @ Wed, 26 Nov 2008 10:39:53 +0800

lionnoisy — Wed, 26 Nov 2008 10:39:53 +0800

I cant understand why so many delay and cancellations in Oz mega

defence projects.Where are all the feasiblity studies?

RAAF's $3.5 billion Project Wedgetail----delayed by 3 years and counting

FFG upgrade ---delayed by 5 years and counting!!

The navy's woes are a combination of bad luck, bad management and bad timing. Mismanagement of important projects has resulted in the planned upgrade of four of the navy's FFG frigates being delayed by almost five years, blowing out the total cost to more than $1.5 billion. The disastrous Kaman Seasprite helicopter project finally was cancelled by Fitzgibbon in April at a cost to the taxpayer of $1.1 billion.

Other weak spots include the abandonment of plans to upgrade the Anzac class frigates into capable air defence platforms and a continuing and alarming shortfall in the navy's anti-submarine warfare capabilities. "The surface fleet is ill-equipped for high-level operations," Davies says.

But the biggest single challenge to the navy today is not its lack of capable equipment but its lack of qualified people to operate it.

All hands on deck

of important projects has resulted in the planned upgrade of four of the navy's FFG frigates being delayed…

3 Nov 2008 | The Australian > Features

@@@@@@@@@

Integration doubts sink $300m torpedo project

The European MU90 lightweight torpedo is being fitted to the navy's Anzac and FFG-class frigates…

20 Jun 2008 | The Australian > Defence

DEFENCE Minister Joel Fitzgibbon has dumped a $300 million plan to fit anti-submarine torpedoes to the navy's Seahawk helicopters and the RAAF's AP3 Orion surveillance aircraft.

The European MU90 lightweight torpedo is being fitted to the navy's Anzac and FFG-class frigates, but the airborne phase of the $616 million project is now considered a high-risk integration challenge by the Government.

Mr Fitzgibbon also expressed concerns over the RAAF's $3.5 billion Project Wedgetail, involving the delivery of six airborne early warning aircraft from 2010.

"I was disappointed to be informed recently by the prime contractor on the project, Boeing, that there will be a further slippage of 10 months in the delivery of the first fully capable aircraft," he said.

"This is a total delay of 38 months against the original contract the former government entered into."

dddd

Crapping thread for the crappers and the crap. replied by Shotgun @ Wed, 26 Nov 2008 03:25:38 +0800

Shotgun — Wed, 26 Nov 2008 03:25:38 +0800

Asian Aussie, I think its best if you leave his mom out of this. =)

Crapping thread for the crappers and the crap. replied by sgstars @ Tue, 25 Nov 2008 22:26:56 +0800

sgstars — Tue, 25 Nov 2008 22:26:56 +0800

for someone who cant differentiate between a wind tunnel and air tunnel and wants to trump the fact that NUS has a air tunnel is making a really idiotic comparision i.e look . HEY, SEE ! my dick is bigger than your balls

which has no-sense whatsoever.

SELF-PWNED +1 to lionnoisy

Crapping thread for the crappers and the crap. replied by Asian Aussie @ Tue, 25 Nov 2008 19:14:07 +0800

Asian Aussie — Tue, 25 Nov 2008 19:14:07 +0800

You say it's stupid to be a launch customer.

Then does that mean SG Airlines were stupid for getting the A380 first?

Is it stupid to have soldiers on roller skates?

Self pwnage again!

Crapping thread for the crappers and the crap. replied by Asian Aussie @ Tue, 25 Nov 2008 19:12:21 +0800

Asian Aussie — Tue, 25 Nov 2008 19:12:21 +0800

I think it's hilarious you calling someone else stupid. You are srsly mentally retarded or deranged. Your mum must have given birth to you standing up, and your head hit the floor.

I apologised to other SG people about the synchrotron, SG has one that goes to 700MeV, Australia 3GeV. The strength I don't think is a major issue though.

No one on this forum ever said Australia was so advanced, it was only ever you and your inferiority complex. Do you have a small dick as well and feel inadequate? LOL

As for the Wedgetail, it is def not good to see delays. Fortunately, Australia was smarter this time around with the contract signing, so that Boeing has to put up with delay costs.

Australia is not perfect, but it is striving v hard to become a much more potent military.

Crapping thread for the crappers and the crap. replied by lionnoisy @ Tue, 25 Nov 2008 11:20:45 +0800

lionnoisy — Tue, 25 Nov 2008 11:20:45 +0800

Tell me what are the new problems:

Defence project suffers further delays

The Australian understands the Wedgetail program was the main subject during talks in Canberra on Monday attended by Defence Procurement Secretary Greg Combet and senior RAAF, Boeing and Defence Materiel Organisation officials.

Initial problems causing delays were due to integration of the aircraft's Northrop Grumman-designed radar.

The latest delay was not caused by radar problems, a defence official said. Mr Combet was also tight-lipped, preferring to talk about another acquisition, the Super Hornet.

First customer is very brave,if not stupid!!

dfddd

Crapping thread for the crappers and the crap. replied by lionnoisy @ Tue, 25 Nov 2008 11:18:11 +0800

lionnoisy — Tue, 25 Nov 2008 11:18:11 +0800

Originally posted by Asian Aussie:

You don't know what water testing is, yet you post it up.

You must be so proud to know that the SG wind tunnel or whatever is faster than Australia's.

Hang on, Australia has a synchrotron, where's SG's?

What is the point of comparing individual facilities? No country is perfect or complete. Your arguments would make a small child cringe cos they carry so little weight.

In short, you are dumber than a small child.

I have not intention to compare initially.

But there are many told me Oz is so good ,so advanced ....

Well.I just want to show SG,right at your door step,is not so bad.

@@@@@@@@@@@

oh SG gets one smaller synchrotron

in power than Oz but SG applications are much more

than Oz!!Thanks to our strong and growing semiconductors manufacturing

and "micro/nanofabrication, a variety of analytical applications, and the development of advanced synchrotron radiation instrumentation."

SG is producing 10 % of Non-fab chips in the world.Do u know?

I think u know manufacturing plays a important role in SG,about

20 % of GDP.This will double in value by 2015 to 2018,according

to a plan announced few years back.

Oz industry is well known for limited sectors.

Lets see how many will use oz new facility.

http://www.synchrotron.vic.gov.au/content.asp?Document_ID=1134

http://ssls.nus.edu.sg/aboutssls.html

In the original vision for SSLS, X-ray lithography for semiconductor microelectronics manufacturing played a central role and helped to get approval for the project in 1997.

Accordingly, SSLS has got a compact superconducting storage ring with 700 MeV electron energy and 4.5 T bending field to produce synchrotron radiation. The characteristic photon energy and wavelength are 1.47 keV and 0.845 nm, respectively........................

Meanwhile, the scope of activities at SSLS has become much broader as it is heading into a strong R&D program that features micro/nanofabrication, a variety of analytical applications, and the development of advanced synchrotron radiation instrumentation.

Micro/nanofabrication by means of X-ray (deep) lithography and the LIGA process is presently aiming at biotechnology, X-ray optics, microoptics, microfluidics, and gigascale microelectronic packaging.

@@@@@@@@@@@

again tis is another example that poor oz is bullied by Yankees contractors!!

or u can say the AEW is really worth to wait for--

the most advanced in the region,if not the world!!

Defence

More delays over Wedgetails

Mark Dodd | 6:50pm THERE are ongoing problems with the Defence Department's contract for Boeing's delayed $4 billion Wedgetail surveillance aircraft.

As reported in The Australian last week, the first of six Wedgetails is now not expected to be delivered until late November 2009, more than 28 months behind schedule.

The Royal Australian Air Force is the launch customer for the aircraft, a modified Boeing 737 airliner, six of which were originally promised for delivery in 2006.

Cancellation of the $1 billion Seasprite helicopter contract for the navy and another purchase for an Unmanned Aerial Vehicle (UAV) capability for the army justified intense government scrutiny and management of defence procurements, he warned.

On a happier note, Mr Combet said he was pleased to see contractual acceptance of the Adelaide Class frigates, HMAS ships Sydney and Darwin after years of protracted delays.But it was a near run thing with widespread speculation 11 months ago the axe would fall on the warship makeover, said Mr Combet.

@@@@@@@@@

In ancient time,delay in military projects will cause your heads roll.

bgbb

Crapping thread for the crappers and the crap. replied by Asian Aussie @ Mon, 24 Nov 2008 19:50:17 +0800

Asian Aussie — Mon, 24 Nov 2008 19:50:17 +0800

You don't know what water testing is, yet you post it up.

You must be so proud to know that the SG wind tunnel or whatever is faster than Australia's.

Hang on, Australia has a synchrotron, where's SG's?

What is the point of comparing individual facilities? No country is perfect or complete. Your arguments would make a small child cringe cos they carry so little weight.

In short, you are dumber than a small child.

Crapping thread for the crappers and the crap. replied by sgstars @ Mon, 24 Nov 2008 17:14:48 +0800

sgstars — Mon, 24 Nov 2008 17:14:48 +0800

Originally posted by lionnoisy:

Hi sgstars,

your writing style looks like Sg Ty.

Are u his twin?

nope. why ?

SG TY dosent bother to reason with you. i do.

sg ty dosent use point form. i do.

why ? i cant be bothered to clone accounts, simply dont have time anyway.

Crapping thread for the crappers and the crap. replied by lionnoisy @ Mon, 24 Nov 2008 15:51:59 +0800

lionnoisy — Mon, 24 Nov 2008 15:51:59 +0800

Hi sgstars,

your writing style looks like Sg Ty.

Are u his twin?

Crapping thread for the crappers and the crap. replied by sgstars @ Mon, 24 Nov 2008 10:39:07 +0800

sgstars — Mon, 24 Nov 2008 10:39:07 +0800

self pwn my dear lionnoisy, self-pwned.

a short article of why NASA has a water-tunnel

http://www.nasa.gov/centers/dryden/about/Organizations/Technology/Facts/TF-2004-05-DFRC.html

"Dryden's Water Tunnel"
Colored dye emitted from tiny ports on this 1/48 F-18 model displays the vortex flow field during tests in the Dryden Flow Visualization Facility. (NASA Photo ECN 33298-36)
Aeronautical engineers at the NASA Dryden Flight Research Center often use water to help make aircraft fly more efficiently and safer.

The water is used in a closed-circuit Flow Visualization Facility (FVF) commonly called "the water tunnel." The facility helps engineers understand the characteristics and effects of air flowing over and past an aircraft or an aircraft component by using water to simulate air. The water flow patterns are studied and recorded in nearly the same way that wind tunnels are used.

Water tunnels have become a very useful diagnostic tool in the development of advanced technology aircraft. Although the FVF is much smaller than most wind tunnels, it can produce three dimensional test results which compare well to actual flight data, but at a much lower cost than a wind tunnel and the FVF tests can be conducted in considerably less time.

Water tunnels such as the one at Dryden are used as a "first step" in providing important information about anomalies and phenomena revealed in wind tunnel tests or in actual flight tests. Water tunnels are also used to study and improve new aircraft and hardware designs. After test results are studied carefully and understood, possible configuration changes on the full-size aircraft can then be considered.

To observe the flow fields and vortices created in the water tunnel, colored dye is injected into the moving water from tiny ports on aircraft models and models of flight hardware. The dye creates a visual three-dimensional image of vortices and flow fields around the test object that can be photographed and recorded on video cameras for subsequent studies. Laser light sheets and shadowgraphs are also used to accommodate photography and video taping in the FVF.

Most of the tests conducted in the FVF have been to study aerodynamics associated with high-angle-of-attack research such as determining the strength and location of vortex flows at various flight attitudes. Angle of attack (AOA) refers to the angle of an aircraft's wings or fuselage relative to the direction in which the aircraft is moving through the air. Wings produce less lift as AOA increases and soon an aircraft can easily become uncontrollable. NASA studies involving high AOA sought better means of controllability at extreme angles of attack. At Dryden, the FVF contributed significantly to the early development of AOA research projects.

Among the aeronautical projects the FVF has supported are the F-18 High Angle of Attack Research Vehicle (HARV), the F-8 Oblique Wing research aircraft, the Space Shuttle, the Air Force YF-22, the X-33, the SR-71, hypersonic vehicle research in which speeds of over Mach 4 were simulated, vortex studies on F-14, F-15, and F-16 aircraft, and high AOA studies of vertical/short takeoff and landing (V/STOL) aircraft.

The facility was used to support the Space Shuttle drag chute verification program at Dryden, and also to study flow fields on lifting body models during development of the X-38. The X-38 was the proposed space station crew return vehicle that incorporated the wingless lifting body concept.

Other uses of the FVF include flow field studies of flight hardware such as pylons, air probes, antennas, and other similar fixtures that would disturb airflow during flight. The FVF has also been useful in helping to determine the best locations for smoke emission devices on a research aircraft being used for in-flight atmospheric flow visualization studies.

FVF Description and Operation

Dryden's FVF was built by NASA in 1983 and is patterned after the Northrop Corporation water tunnel in Hawthorne, Calif. It was designed to consume a minimum of floor space, a factor that resulted in a vertical orientation of the facility's three main structural components -- a vertical test section, a horizontal test section, and the settling tank. The other main component is the pumping system located at ground level.

The vertical test section is a four-sided chamber 6 feet high, 16 inches deep and 24 inches wide. It is constructed of 2-inch clear acrylic plastic on all sides so that tests can be observed from nearly all angles. A round 16-inch door on the outboard 24-inch side gives personnel access to the interior for model mounting and test preparation.

The horizontal test section is 77.5 inches high and 24 inches wide. Visual and physical access to the horizontal unit is limited because the top of the chamber is more than 15 feet above the floor and access must be from above. The horizontal chamber is very suitable as either a free-surface channel or as a water table by using a sluice gate on the "upstream" end of the section. The distance the sluice gate is open, combined with adjusted pump speed, can adjust the flow rate. During shadowgraph photography in the horizontal chamber, conditions simulating supersonic and hypersonic speeds can be created and studied.

The largest part of the FVF is the 15.5-foot high, 24-foot wide stainless steel settling tank. When the FVF is operating, a 15-hp electric centrifugal pump sends water into the bottom portion of the settling tank through a 12-inch pipe. The water enters the settling tank through a series of small holes drilled around the perimeter of the entry pipe to reduce turbulence created by the pumping action.

Pumping action forces the water to rise and flow across the upper portion of the settling tank into a smaller horizontal section where it passes through two honeycomb flow straighteners that stabilize the flow and eliminates turbulence. The horizontal test section is that portion of the upper channel between the two flow straighteners.

After passing through the horizontal section, water flows down past a third honeycomb straightener and enters the vertical test section. The water exits the bottom of the test section through an 8-inch return pipe and is carried back to the centrifugal pump for continuous recirculation. On the "upstream" side of the pump is a diatomaceous earth filter that constantly cleanses the water. The velocity rate of the water can be varied from 2 to 10 in. per second, based on the type of test being carried out. Experience has shown that a velocity rate of slightly more than 3 in. per second generally provides the best visualization results, with minimal water turbulence, for most tests.

Test Models

Models used in the FVF are typically scaled 1/32 and 1/48. Commercial plastic model kits are often used if a model of the real aircraft associated with the test project is available. Commercial plastic models are excellent tools for use in the FVF because they are usually very accurate in depicting design configurations and their price tags helps keep operational costs low. The loads on the models created by the dynamic pressure of the water are low and eliminate the danger of breakage in most cases.

The model kits are assembled in the Dryden model shop where technicians carefully prepare their surfaces to assure that test data isn't compromised by imperfections. The models are supported inside the test chamber by an attachment called a sting.

Once model shop technicians identify where the dye injections lines are located they are installed before assembly is complete. The external ports must be flush with the model's surface so the flow of the dye will not affect the model's flow field.

On most models of jet aircraft tested in the FVF the engine inlets are open and water is allowed to enter to create the simulation of mass flow through the engine or engines. The water passes through the inlet and is then ducted away from the test section so it doesn't disturb the flow field. During tests where water flows into the inlets, the flow rates in the test chamber and the inlet are carefully coordinated to correspond to specific flight conditions.

Engine exhaust streams are also modeled in the same fashion by ducting water from outside the test chamber into the model and out the exhaust outlet. Water flow in the test chamber and inside the model is coordinated much like the inlet flow to correspond to realistic flight conditions.

Model shop craftsmen also make models of specialized test hardware and components when they are not available from another source, such as pylons, air probes, antennas, and other fixtures that would disturb airflow during flight.
Colored dye emitted from tiny ports on this 1/48 F-18 model displays the vortex flow field during tests in the Dryden Flow Visualization Facility. (NASA Photo ECN 33298-36)
The size of the models tested in the FVF are limited by the dimensions of the test chambers, but researchers prefer large models over small ones because they usually yield more accurate test data and visual flow details are more easily studied.

Most of the tests carried out in the FVF are for visual purposes and still photos and videotape are the primary means of acquiring visual documentation of tests results. The video system, using _-in. tape, includes a text generator that creates title screens and displays test conditions. A video screen splitter allows the camera to record the platform of the test article and side views simultaneously.

Model positioning in the FVF is controlled by a computerized system that includes a motion controller, servomotors, a joystick, and a model support arm inside the test chamber. A model's angle of attack and yaw angle (in relation to the direction of water flow) can be adjusted by either moving the joystick or by entering the desired position into the computer. As position inputs are made, a character generator linked to the video camera system records the new position on videotape. A typical model 18-in.long will have an angle-of-attack range of -30 degrees to +90 degrees. The yaw angle will usually be limited to about 15 degrees because of wingspans.

Dye Injection System

The use of colored dye is the most common means of producing flow visualization in the FVF. It is commercial vegetable-based food coloring found in most any grocery store.

The dye is emitted into the water from flush ports, external tubes, probes or any other means that will allow it to be captured by the flow field being studied.

A system of six pressurized dye containers is mounted on the outside of the test section. Each can hold a different color and the rate of flow at each container are controlled by individual needle valves. Dye feed lines from the containers are placed in the test chambers and attached to the models in the vertical test section through the side door.

Individual test requirements determine how the dye lines are configured and how many are used. Each dye line can be routed to many smaller lines through a manifold system. Tests in the FVF have seen as many as 120 dye lines being used simultaneously.

Laser Light Sheets

Laser light sheets are used to visualize the cross section of a flow field. Either fluorescent dyes or a particulate such as aluminum powder is placed in the flow field "upstream" to act as a tracer element. A thin but broad sheet of laser light is used to illuminate the tracer element at a particular location in the flow field, based on test requirements.

The tracer elements give off a brilliant pattern in the flow field as the laser light sheets illuminate them.

During the tests, the laser light sheets can be moved and scanned across the model, they can be oriented vertically or horizontally, and are easily photographed or recorded on videotape.

Shadowgraph Photography

The horizontal test chamber is normally used for tests that call for a free surface water table where conditions will allow simulated supersonic and hypersonic speeds to be visually recorded.

For these tests, two-dimension models are placed on the bottom of the test chamber that is painted white. Cameras and lights are placed above the test chamber. The flow rate is controlled by placement of the sluice gate and a coordinated pump speed. Shadows of waveforms -- analogous to atmospheric shock waves -- are created on the chamber floor by overhead lighting and can be easily photographed.

Simulated Mach numbers of 4.10 have been created in the horizontal test chamber during past studies of high-speed flight vehicles.

FVF Benefits

The Dryden FVF has become a convenient, inexpensive, and accurate research tool for project personnel who need to study fluid dynamics phenomena in connection with advanced technology vehicles, especially those associated with high angle-of-attack flight.

The facility allows flow field visualization and interpretation in a timely and cost-effective environment, factors that are becoming increasingly important as aerospace vehicles become more complex and expensive.

Advancements in model construction and instrumentation, along with increased knowledge of the behavior of fluids, will give the Dryden FVF an even more important role in NASA's quest to keep the United States at the forefront of world aviation

yea sure, i am pretty sure that water tunnels will "break once they exceed mach1"

- depends on design, pump, return system of individual water tunnel.

-cheaper, affordable, accurate

-cost-effective

-use of dye allows multiple variables to be tracked and studied. easy visual referencing and understanding as well.

how how how lionnoisy ? seems like you are WRONG again. it really depends on the water tunnel design, but if the NASA one can go up to 4.1 mach as well in testing. why not the australian one ?

its an inherent potential within to reach that capability. whethjer it reaches the capability or not is a matter of design and engineering.

admit it lionnoisy. u posted the water tunnel thing without knowing what you were saying.

Crapping thread for the crappers and the crap. replied by lionnoisy @ Mon, 24 Nov 2008 10:17:39 +0800

lionnoisy — Mon, 24 Nov 2008 10:17:39 +0800

I am doubt what is the extend of usefulness of water tunnel testing?

If u increase the speed of water to say,Mach1,i think the tank will break.

So,the speed that they test in water tank cant be too high.

Crapping thread for the crappers and the crap. replied by sgstars @ Mon, 24 Nov 2008 10:16:12 +0800

sgstars — Mon, 24 Nov 2008 10:16:12 +0800

1) water tunnel and wind tunnel serve similar engineering purposes u moron.

http://www.answers.com/topic/water-tunnel-hydrodynamic

A water tunnel is an experimental facility used for testing the hydrodynamic behavior of submerged bodies in flowing water. It is very similar to a recirculating wind tunnel but with water as the working fluid, and related phenomena are investigated, such as measuring the forces on scale models of submarines or lift and drag on hydrofoils. Water tunnels are sometimes used in place of wind tunnels to perform measurements because techniques like PIV are easier to implement in water. For many cases as long as the Reynolds number is equivalent, the results are valid, whether a submerged water vehicle model is tested in air or an aerial vehicle is tested in water. For low Reynolds number flows, tunnels can be made to run oil instead of water. The advantage is that the increased kinematic viscosity will allow the flow to be a faster speed (and thus easier to maintain stably) for a lower Reynolds number.

Whereas in wind tunnels the driving force is usually sophisticated multiblade propellers with adjustable blade pitch, in water and oil tunnels the fluid is circulated with pumps, effectively using a net pressure head difference to move the fluid rather than imparting momentum on it directly. Thus the return section of water and oil tunnels does not need any flow management; typically it is just a pipe sized for the pump and desired flow speeds. The upstream section of a water tunnels generally consists of a pipe (outlet from the pump) with several holes along its side and with the end open followed by a series of coarse and fine screens to even the flow before the contraction into the test section. Wind tunnels may also have screens before the contraction, but in water tunnels they may be as fine as the screen used in window openings and screen doors.

so going by your logic, NUS must be stupid to invest in a wind tunnel since water tunnels have some inherent benefits over wind tunnels ?

use abit of brain first. different types of systems, different aims and purpose. u cant compare lemons and apples that simply. one must look at the characteristics and then compare from there,

and how does a car making capability relate to m113 upgrades ?

SG is light years ahead of AUS military ? quantify. remember AUSTRALIA now has the world's most deadliest frigates. what does sg have ? 6 formidable class without their seahawks. which means we just about have ASW operating at a substantially degraded capability.

and in relativity. answer the qn about mk47 and SCAR/ELGM and FN2000/ELGM. dont know, dont talk nonsense.

ANSWER the existing qns.

oh btw, whats a queene ? i m still eagerly awaiting your answer on that.

Crapping thread for the crappers and the crap. replied by lionnoisy @ Mon, 24 Nov 2008 09:56:01 +0800

lionnoisy — Mon, 24 Nov 2008 09:56:01 +0800

Summary:

Oz's Trisonic” wind tunnel(upgraded)---0.8 x0.8m test section and max speed 1.4 Mach.

Singapore Trisonic” wind tunnel--1.2 x 1.2m test sect.max 4.0 Mach.Yes.Mach Four!!

The upgrade of four (OZ)guided missile frigates might be four years late but, experts say, the navy now has the most lethal frigate fleet on earth.

well.Does the same country possess a wind tunnel to test aircrafts

UAV or missiles etc?Yes,they have;

http://www.defence.gov.au/news/raafnews/editions/2001/4308/story14.htm

1999: (Oz)New transonic wind tunnel opens.

eeee

http://www.dsto.defence.gov.au/publications/2302/DSTO-TR-1074.pdf

page 13

Collision Detection Modelling for Store Release
Testing at AMRL
Sunny Yin Fat Leung, Yoel Y Link
and Craig D Edwards
Air Operations Division
Aeronautical and Maritime Research Laboratory.oz

dated 2000.

pl note the report said the tunnel recently upgraded!!

2.1 Transonic Wind Tunnel Specification
The transonic wind tunnel, as shown in Figure 1, is a closed-circuit continuous flow
wind tunnel capable of achieving continuously variable Mach numbers from 0.3 to 1.2,and Mach 1.4 with a fixed nozzle....test section 0.8 x 0.8 m

Singapore one is Mach 4 and 1.2x 1.2m!!

below--water tunnel of oz..

http://www.dsto.defence.gov.au/gallery/?offset=10

http://www.dsto.defence.gov.au/gallery/1241/watertunnel3.jpg

Testing in the Water Tunnel

--(lion note ,an F/A-18 aircraft.pl read below)

Vortical flow over a model of an F/A-18 aircraft

@@@@@@@@@@@@

BTW.i think NUS can extend their helping hands if oz asks for it.

Launching of Wind Tunnel Facility and Electromagnetic ...

Launching of (Singapore National)Wind Tunnel Facility and Electromagnetic Compatibility Centre in NUS---below

The National Wind Tunnel Facility and Electromagnetic Compatibility Centre

jointly built by National University of Singapore and DSO National Laboratories

@@@@@@@@

Trisonic Wind Tunnel--test-section: 1.2m x 1.2m, Mach No: 4 (max),

Laboratory Facilities

TRISONIC WIND TUNNEL AT NUS

In collaboration with DSO National Laboratories, a Trisonic Wind Tunnel has been built in NUS. The wind tunnel has a test-section of 1.2m x 1.2m, and is called a “Trisonic” wind tunnel because it can operate at subsonic, transonic, and supersonic speed of up to 4 times the speed of sound (i.e. Mach 4). To get a sense of perspective of the operating speed, Boeing 747 and Airbus A380 are normally cruising at around Mach 0.85, and most fighter aircrafts at around Mach 2.0. This wind tunnel facility is the only one of its kind in South East Asia with a large enough test section for serious research measurements.

Oz's Trisonic” wind tunnel---0.8 x0.8 test section and max speed 1.4 Mach.

pl read above in the same post.

Subsonic. The laboratory houses seven subsonic wind tunnels, in various sizes ranging from 1m x 2m to 0.33m x 0.33m sections.

Supersonic. The laboratory houses a supersonic wind tunnel:

Test-section: 50 mm x 50 mm

Speed: up to Mach 1.78

In addition, we have access to the trisonic wind tunnel (SWIFT) located at NUS:

Test-section: 1.2m x 1.2m

Speed: up to Mach 4

@@@@

pl note i am not insulting or laugh at other countries' facilities or technology

level.I just want to show it is not a oz u think.

there are too many here saying SG is light year behind oz in military

technology.

There is no easy answer and meaningless to say who is better .

All these are my reply.Facts and correct info speaks volume

than funny pictures of unrelated reply and postings.

My favourest reminder is oz upgrade of M113,much later than

Singapore.The worse is Oz being a car making country!!

Why Oz is awlays bullied by USA defence contractors??

Currently,there is no Oz certified air tanker can fly for operations!

Wedgetail is deplayed for few more months.....

This is not the Oz u think!!

mmmm

,,,,

Crapping thread for the crappers and the crap. replied by Asian Aussie @ Sat, 22 Nov 2008 13:21:24 +0800

Asian Aussie — Sat, 22 Nov 2008 13:21:24 +0800

Your pointless post does not deserve a response you idiot. Just look back at my last post for your answer.

Crapping thread for the crappers and the crap. replied by sgstars @ Sat, 22 Nov 2008 12:51:06 +0800

sgstars — Sat, 22 Nov 2008 12:51:06 +0800

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