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Superman 12-16-2009 10:44 AM

I recall seeing the wing stress test on the 777 and thinking that if that plane ever actually pulled that many G's, the occupants would all be unconscious.

If I had a dollar for every B-52 I've watched (I lived near Fairchild AFB in Spokane)......... Those planes look like they're flapping their wings before takeoff.

fingpilot 12-16-2009 11:40 AM

Typical test flight routine will be to stay well within a safe engineering parameter. As the time aloft and the data numbers start to accumulate, each parameter will be slowly expanded, eventually going somewhere around 115% to 130% of limit.

I did several years of production test flying for Gulfstream in Savannah. I never worried about being out on the line in service ever again after that. Having seen what is done to every greenie prior to delivery.

Wing flex? Sit over the wings in a 747-400, gross weight takeoff. Taxiing out, the winglets, with droop, are below line of sight. Airbourne, the line of sight is mid-wing. Tops of winglets are almost tough to see sitting next to window. I believe I heard 17 feet of flex from droop to top of stable flex. More in turbulence.

My standard line to squeemish passengers was that the plane was stressed for far more G's that the human body.

Design parameters? Human being? 6-ish MPH. 1 G. 15 foot fall. 14.7 psi nominal. 45 to 100F. Anything else requires a mod to avoid death. I would usually remember these parameters on the bike when trail braking into a corner a little too fast. Also on takeoff at gross passing EFCA (engine failure cleanup altitude), calling for slat/flap retraction. Would always look over my shoulder at the outboard nacelle, straining at the pylon, condensate filling the inlet.

A lifetime of mental pictures, impossible to duplicate, except thru writing about them.

Scuba Steve 12-16-2009 11:46 AM

First landing was loads of fun, except for the weather. I'm glad to see this finally in the air already! I was amazed at how quiet the plane was at arrival and when the TRs were being used. APU hardly made any noise either. The air conditioning units are louder than anything else.

Schumi 12-16-2009 11:46 AM

I'm always reminded of my first full on-track excursion in a formula car. Braking at 2.5 G's makes your eyeballs feel like they are going to shoot thru your visor.

Plane rides are boring after that kinda thing.

Ned, NYNA11 12-16-2009 01:36 PM

My aunt flew to JFK from Ireland in the 70's when she was in her late 70's.

It was her first flight.

I asked her if the flight had been smooth and she replied that it was and said that the wings didn't flap at all!

pwd72s 12-16-2009 02:21 PM

Quote:

Originally Posted by Schumi (Post 5073331)
I'm always reminded of my first full on-track excursion in a formula car. Braking at 2.5 G's makes your eyeballs feel like they are going to shoot thru your visor.

Plane rides are boring after that kinda thing.

Guess you've never flown an F-111 supersonic 200 feet off the deck...Why my retired pilot buddy says high performance cars bore him.

Joeaksa 12-16-2009 02:25 PM

Quote:

Originally Posted by javadog (Post 5073018)
Boeing keeps a couple of them for chase duty. I believe they are the made-in-Canada versions licensed by Lockheed. No idea when these two were built.

JR

Canadian version has a better (read more thrust, does not catch fire and blow up as easily) as the original engine.

Noah930 12-16-2009 03:23 PM

What's the doohickey trailing off the top of the tail fin?

rick-l 12-16-2009 03:24 PM

Quote:

Originally Posted by Scuba Steve (Post 5073330)
First landing was loads of fun, except for the weather. I'm glad to see this finally in the air already! I was amazed at how quiet the plane was at arrival and when the TRs were being used. APU hardly made any noise either. The air conditioning units are louder than anything else.

Is this one of the planes that the wing root design broke in test and they super glued on a patch. Will they sell it to a customer?

abisel 12-16-2009 03:57 PM

Quote:

Originally Posted by Noah930 (Post 5073794)
What's the doohickey trailing off the top of the tail fin?

Flight test instrumentation. Maybe a static trailing cone used for altitude and airspeed position error determination.

Here's another link with lots of info on the Dreamliner. Navigate around the tab selections. Check out the Multimedia 787 Podcast. Some cool stuff.

http://www.newairplane.com/

dewolf 12-16-2009 04:19 PM

The wings look like Albatross wings. Long and thin.

Joeaksa 12-16-2009 04:51 PM

All sorts of extra stuff on flight test airplanes. All of that will be removed on the production line jets.

air-cool-me 12-16-2009 08:02 PM

Quote:

Originally Posted by tcar (Post 5072956)
Chase planes are Lockheed T-33's. First built 60 years ago, but those may be newer; but not new.

Haven't seen one of those flying for decades. When I was a kid, the New Mexico NG flew them from Albuquerque.

Significance? Anyone know?


Boeing Skyfox - Wikipedia, the free encyclopedia

they have them left over from the aborted skyfox program...

"program to modify the aging Lockheed T-33 jet trainers into a modernized, twin-engine aircraft. It was made as a primary trainer to compete and replace the Cessna T-37 Tweety Bird."

Sarc 12-21-2009 10:08 AM

I've watched that video a few times now and keep thinking to myself how cool it would be if the test pilot channelled his inner Tex Johnston on one of these flights and did a barrel roll a la the old dash-80. Could you imagine the reaction in todays media saturated world? :cool:


http://mistercrew.com/files/2009/08/tex_barrel_roll.jpg

450knotOffice 12-21-2009 10:53 AM

I love that shot! Never tire of it. Have you ever seen the video taken from the ground?

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cgarr 12-21-2009 11:12 AM

Quote:

Originally Posted by 450knotOffice (Post 5082458)
I love that shot! Never tire of it.

But wanted too I bet:D Ahhh the good ole days!

Sarc 12-21-2009 12:02 PM

Quote:

Originally Posted by 450knotOffice (Post 5082458)
Have you ever seen the video taken from the ground?

A few times....and I never tire of it!


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