RE: Best Aviation Movie...

RE: Supersonic Wind Tunnel - Alternative?

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RE: The Cone Behind The Last Turbine Stage In A Jet...

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RE: The Cone Behind The Last Turbine Stage In A Jet...

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RE: Why Are The TF-39 On C-5 Galaxy So Loud?

One of the features of the TF-39 is its "stage and a half" fan rotor. It was a two-rotor fan with the first stage having blades half the length of the second stage. The "half" stage was surrounded by inlet guide vanes. The highly non-uniform flow field created by this arrangement causes lots of nois...

RE: Metal Bar Above Aircraf Door.

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RE: Metal Bar Above Aircraf Door.

Noticed how they are angled to be tangent to the flow circulation caused by the wing.

RE: GEnx, I Want One!

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RE: GEnx, I Want One!

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RE: GEnx, I Want One!

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RE: Boeing 787 Dreamliner's 1st Commercial Logojet...

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RE: Powerplants For Airbus Wide Body SST?

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RE: Powerplants For Airbus Wide Body SST?

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RE: Powerplants For Airbus Wide Body SST?

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RE: DC-10 / MD-11 What's The Difference?

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RE: DC-10 / MD-11 What's The Difference?

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RE: Hypersonic Civilian Airliner

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RE: How Are Compressors 'made' To Work?

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RE: C-17 Engine Cowling Fins.

Read this guys: from Dick Shevell's AIAA paper "Aerodynamic Bugs: Can CFD Spray Them way": "DC-10 wind tunnel tests showed a significant loss in maximum lift coefficient in the flap deflected configurations, with landing slat extension, compared to predictions. This resulted in a stall speed increas...

RE: Dumb Question About Sidestick Controllers

Contrary to popular belief using a left-handed side-stick is a tough time, often fraught with panic and confusion. In fact when Airbus first introduced the side-stick there was world-wide shortage of cognitive psychologist because Airbus hired all of them to help pilots adapt the fearful and uncommo...

RE: What Are The Small Bars On Top Of Doors?

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RE: Unique Features Of The GE90?

Check out GE90 Theatre <a href="http://www.geae.com/education/theatre/ge90/">http://www.geae.com/education/theatre/ge90/</a> and while you're there check out GEnx Theatre <a href="http://www.geae.com/education/theatre/genx/">http://www.geae.com/education/theatre/genx/</a> <TABLE BORDER=0 ALIGN=CENTE...

RE: Afrl Starts Work On Stealthy Tanker Design

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RE: My Proposal For Reducing Impact Of Wake Vortices

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RE: Panic Button?

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RE: 100000 Lb After Bunering Turbo Jet?

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RE: Purpose Of Cowling Fin

My comment about the Honda design is now irrelevant because the moderators have deleted the postings about the HondaJet however the quoted abstract may still be of value to those who are interested in over-wing mounted engines.

RE: Purpose Of Cowling Fin

The Honda design is pure hotness... common thinking is that putting the engine over the wings is not a good idea but check out the following abstract from an AIAA Journal of Aircraft paper written by the Honda R&D guys: <i> Wave-Drag Characteristics of an Over-the-Wing Nacelle Business-Jet Configura...

RE: What Is 1X Kilonewton In Horsepower?

Awesome thread guys... <i>this is what tech/ops is all about</i>. I just checked in with a principle cycle designer here at <acronym title="Trans Asia Airways (Taiwan)">GE</acronym> and unfortunately I have to take sides. The bottom line: a jet engine does do work to the air. There is a net kinetic ...

RE: Turbofan C02 Emissions

Emissions are part of the certification process. In fact emissions is one of the key drivers in engine technology research now. Europeans are very concerned with this issue so not surprisingly they are the best source for info. Look here for more emissions data than you can shake a stick at: <a href...

RE: 100000 Lb After Bunering Turbo Jet?

Actually... theoretically anything is possible if you're just talking about the thermodynamic cycle. In my college vehicle design class I designed a cycle for a modified GE90 with an afterburner. Get this... the thrust with afterburner ~400k lb!!! The computer-based cycle deck said it work would lik...

RE: How About Passenger Cabin Ejection?

Let's do some rough math, shall we? Operating Empty Weight of a 747-400 Freighter: 361,700 lb Operating Empty Weight of a 747-400 Pax: 397,000 lb (419 tri-class interior) I assume the difference between the two (35,300 lb) is weight of the seats and other pax-specific equipment. Now I add the weight...

RE: How About Passenger Cabin Ejection?

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RE: Would Gigantic Parachutes Help A Powerless Jet?

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RE: Purpose Of Cowling Fin

Damnit!!! Even after posting the article... <TABLE BORDER=0 ALIGN=CENTER WIDTH=95% style="border-top: 1pt #28455E solid;border-right: 1pt #1B2E3F solid;border-bottom: 1pt #1B2E3F solid;border-left: 1pt #28455E solid;table-layout:fixed;border-spacing:0;padding:0;border-collapse: collapse;" bgcolor=#1...

RE: Purpose Of Cowling Fin

Ah... very observant... before people start wildly speculating let me post this well-written article about (drum role) <b>Nacelle Strakes</b>!!! from Dick Shevell's AIAA paper <u>Aerodynamic Bugs: Can CFD Spray Them Away</u>: "DC-10 wind tunnel tests showed a significant loss in maximum lift coeffic...

RE: Importance Of A Master's Degree

That was a bit glib.

Importance Of A Master's Degree

Hey all, Seems the fad nowadays is for young people to go out and get graduate level degrees just for the sake of getting them (i.e. something else to have on a resume). I'm an engineer about 2 years out of college and it seems like that's the rage among my peers. I wanted to know what you guys thou...

RE: B2 Bomber Your Favorite Aspect

Gotta be the shape! The flying wing is dead sexy and it let's the uninitiated public know that there is more to airplanes than just tubes with wings.

--Shane

RE: Anyone Speak German...hissyfit On Ebaums

Holy shitballs!!! That's the wierdest/funniest video I've seen on the web in a while.

Parents, make sure your computer-savvy kids get a chance to play outside and get plenty of sunshine and fresh air!  

RE: MD11 Wing Tips And Their Down Facing Counterparts

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RE: Comparing Baby Bus And Baby Boeing.

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RE: Comparing Baby Bus And Baby Boeing.

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RE: Change In Engine Sounds At Max Power

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RE: Change In Engine Sounds At Max Power

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RE: Challenger Disaster 20 Years Ago Today

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RE: Change In Engine Sounds At Max Power

Should you ever get to be on board an airplane during a high-power ground run I recommend you take a stroll from the flight deck to the aft galley. You can actually hear the different kinds of sound a jet engine makes. Inlet aero noise at the front of the plane. Mechanical and combustion noise near ...

RE: Parachuting From Large Planes?

Here's some interesting info about parachute egress issues on the C-17: <i>The C-17 can carry 102 parachutists at any one time. Dual door exists allow these parachutists to deploy the aircraft in 55 seconds. On 12 August 1994, during routine development flight testing at Edwards AFB, <acronym title=...

RE: What Are These Called?

An interesting fact about flap track fairings is that in addition to reducing profile drag (as would be expected) they also reduce transonic wave drag by brining the area distribution of the aircraft closer to ideal. Source: <a href="http://www.aerospaceweb.org/question/aerodynamics/q0240.shtml">htt...

RE: Did Wings Ever Fail On An Airliner?

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