Random facts about planes..

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Discussion

deltashad

6,731 posts

198 months

Wednesday 10th May 2017
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You can be 2 hours into a flight from Amsterdam to Angola and if the toilets don't work they will turn around, land back in Amsterdam, try to fix the plane, crew change then .... well.... not sure as I'm still on the runway at Schipol.
Hope they take off soon or my visa will be cancelled. Which will mess up my work visa I just spent months and nearly 2k pounds sorting out.

pfsv427sc01

84 posts

149 months

Wednesday 17th May 2017
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The wing of the 747 develops 1 pound of lift for every square inch of top surface.

Concorde had 11 fuel tanks used to adjust the Centre of Gravity during flight. During hangar testing in Filton, an electrical "hanger pilot" fiddled with the electrical switches in the cockpit and, inadvertently, transferred fuel to the rear tank causing the whole aircraft to tip up on its arse !

The nose was up amongst the roof structure of the Brabazon hanger. The site was locked down and phones disconnected until cranes were brought in and straps slung beneath the fuselage. Fuel was then transferred back forward whilst the weight was taken by the cranes, bringing the plane back down to the ground !

The first VC10 converted to the flying tanker role, ZA141, was nearly lost during test flights. During a stall test, the plane could not be easily recovered and subsequently exceed its maximum speed in the dive before being recovered. During inspection back in the hanger, it was noticed that many rivet heads on the vertical tailfin had become proud of the skin. Inspection inside showed all the internal frames had shattered. The next flight would like to have caused the tail to fall off.

A replacement tail was taken from another aircraft at Wroughton and fitted. Flight testing then recommenced.

The inflight refuelling probe on the receiving aircraft was called the "donkeys dick" for obvious reasons !

texaxile

3,300 posts

151 months

Wednesday 17th May 2017
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Shakermaker said:
Which it was. It had literally JUST taken off and was unable to get out of the way/stop etc. The underside of the KLM hit the upper half of the Pan Am
My father worked for "Willis Faber and Dumas" for a year in the 70's who were the insurers in this instance, he was assigned some of the paperwork to the case and frequently mentions it. I'll interrogate him over fish and chips this Friday and see if I can get some info.

Atomic12C

Original Poster:

5,180 posts

218 months

Thursday 18th May 2017
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The coefficient of lift for any aerofoil is a dimensionless number - it basically captures a shape within the lift equation.


The Wright brothers famous airplane did not adopt ailerons in order to cause a roll movement on their plane, instead they had an arrangement of wires which were pulled to deform the whole wing shape which would cause more lift on on side of the plane than the other.

Interestingly enough there is an amount of new research in to adopting this old concept to control aircraft roll via the use of new flexible and composite materials and modern avionics, with the end aim to give a reduction in weight and more effective/efficient control over the aircraft.

Eric Mc

122,097 posts

266 months

Thursday 18th May 2017
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Atomic12C said:
The Wright brothers famous airplane did not adopt ailerons in order to cause a roll movement on their plane, instead they had an arrangement of wires which were pulled to deform the whole wing shape which would cause more lift on on side of the plane than the other.
Many early aircraft used wing warping - both before and after the Wrights.

Krikkit

26,555 posts

182 months

Thursday 18th May 2017
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Atomic12C said:
The coefficient of lift for any aerofoil is a dimensionless number - it basically captures a shape within the lift equation...
So it's a coefficient then, yeah? They're dimensionless by definition.

Atomic12C

Original Poster:

5,180 posts

218 months

Thursday 18th May 2017
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Krikkit said:
So it's a coefficient then, yeah? They're dimensionless by definition.
Erm...yeah.
Dimensionless - totally man.
Believe it.

wink

nonsequitur

20,083 posts

117 months

Tuesday 23rd May 2017
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I once landed at Heathrow virtually sideways due to very strong winds. Almost had to go-around. First officer was handling, top marks to him.

Ayahuasca

27,427 posts

280 months

Tuesday 23rd May 2017
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Eric Mc said:
Atomic12C said:
The Wright brothers famous airplane did not adopt ailerons in order to cause a roll movement on their plane, instead they had an arrangement of wires which were pulled to deform the whole wing shape which would cause more lift on on side of the plane than the other.
Many early aircraft used wing warping - both before and after the Wrights.
Birds still use it to this day having failed to evolve a system of flaps and ailerons.

conkerman

3,301 posts

136 months

Tuesday 23rd May 2017
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Suckers!

QuantumTokoloshi

4,166 posts

218 months

Tuesday 23rd May 2017
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Ayahuasca said:
Eric Mc said:
Atomic12C said:
The Wright brothers famous airplane did not adopt ailerons in order to cause a roll movement on their plane, instead they had an arrangement of wires which were pulled to deform the whole wing shape which would cause more lift on on side of the plane than the other.
Many early aircraft used wing warping - both before and after the Wrights.
Birds still use it to this day having failed to evolve a system of flaps and ailerons.
Wing warping is being looked at again, as a lower drag option over conventional wings, flaps etc.

tommyjj

150 posts

199 months

Tuesday 23rd May 2017
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Due to packaging issues, the Hawker Siddeley Trident had a front landing gear that was offset from the centre line about 5 ft port.

The reason that the window blinds are opened during take off is so the crew can tell whether or not its safe to evacuate each side following a crash.

In a similar vein, the reason night take-offs are always carried out with the cabin lights dimmed is so that your eyes will adjust to the darkness faster if you have to evacuate.

Prior to the invention of GPS, many larger airliners used complex inertial navigation systems that actually recorded every bump, climb, turn and dive, along with airspeed, to establish where the plane was. They were surprisingly accurate given how implausible the idea sounds.

The Airbus A340 was designed for very long flights, often over huge deserted areas like the North pole. Because of this lengthy flight time, they were often equipped with a stretcher that fitted into a cooled locker, so that if someone died halfway across the pole, their body wouldn't have to be left propped up in a seat with other passengers.

The weird dog barking noise you hear on some airbus aircraft around taxiing and landing is the hydraulic pressure regulator housed under the cabin floor. Boeing use a different system that doesn't make the same noise.

Next time you worry about a plane falling out of the sky when it gets bumpy, remember that an airliner can easily withstand the kind of turbulence that would result in deaths or serious injuries to many of the passengers (from smashing around the cabin and/or hitting the overhead PSU)

Most airliners will glide a surprisingly long way without power. Air Transat Flight 236 lost power in all 4 engines while crossing the Atlantic, but the crew managed to keep the aircraft in the air for almost 20 minutes, during which time they had glided 75 miles where they then performed a safe landing at an airbase on the Azores.

stuttgartmetal

8,108 posts

217 months

Tuesday 23rd May 2017
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Concord's windscreen had ultra thin layers of gold leaf that could be seen through.

Ginetta G15 Girl

3,220 posts

185 months

Tuesday 23rd May 2017
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A lot of aircraft do including Nimrod, C-130, Jetstream, and HS-125. They are gold film window-heating elements.

Aside from cutting down glare, they also help 'soften' (or at least reduce the brittleness) of the perspex which gives you a certain amount of protection against birdstrikes.



Edited by Ginetta G15 Girl on Wednesday 24th May 00:32

eccles

13,740 posts

223 months

Wednesday 24th May 2017
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Ginetta G15 Girl said:
A lot of aircraft do including Nimrod, C-130, Jetstream, and HS-125. They are gold film window-heating elements.

Aside from cutting down glare, they also help 'soften' (or at least reduce the brittleness) of the perspex which gives you a certain amount of protection against birdstrikes.



Edited by Ginetta G15 Girl on Wednesday 24th May 00:32
Another random fact, if it has gold leaf as the heating element it's most likely made of glass, not perspex. smile

LimaDelta

6,534 posts

219 months

Wednesday 24th May 2017
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tommyjj said:
Most airliners will glide a surprisingly long way without power. Air Transat Flight 236 lost power in all 4 engines while crossing the Atlantic, but the crew managed to keep the aircraft in the air for almost 20 minutes, during which time they had glided 75 miles where they then performed a safe landing at an airbase on the Azores.
Fact: From most points above the Atlantic, a 75 mile glide will do little to alter the eventual outcome.

Dr Jekyll

23,820 posts

262 months

Wednesday 24th May 2017
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LimaDelta said:
Fact: From most points above the Atlantic, a 75 mile glide will do little to alter the eventual outcome.
In 20 minutes it ought to be possible to cover more than 75 miles though. More importantly, it's potentially 20 minutes less in the water before rescue arrives.

LimaDelta

6,534 posts

219 months

Wednesday 24th May 2017
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Dr Jekyll said:
LimaDelta said:
Fact: From most points above the Atlantic, a 75 mile glide will do little to alter the eventual outcome.
In 20 minutes it ought to be possible to cover more than 75 miles though. More importantly, it's potentially 20 minutes less in the water before rescue arrives.
At the risk of dragging this off topic - I am someone who sails across oceans for a living. They are incredibly empty. 20 minutes, 75 miles, whatever. Chances of it making a real difference are pretty slim I'd say.

Dr Jekyll

23,820 posts

262 months

Wednesday 24th May 2017
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Nanook said:
tommyjj said:
Due to packaging issues, the Hawker Siddeley Trident had a front landing gear that was offset from the centre line about 5 ft port.
Pardon?


Dr Jekyll

23,820 posts

262 months

Wednesday 24th May 2017
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Nanook said:
Dr Jekyll said:
5 feet though?!
Must admit I thought it was more like 2 or 3, but it looks more on that picture. I always quite liked the story that the autoland was so accurate the nosewheel had to be offset to avoid wear and tear on the runway lights.