FabSwingers.com forum: quiz question. do not google.

By *4bim OP Man
over a year ago

Farnborough Hampshire

after PW asked why people dont start new threads i will ask a question for you all to guess the answer.

its just for fun so please do not google or youtube as my video on there will reveal the answer. and yes i am a qualified pilot who has done this in a simulator for an emergency procedure.

i also work on development of m/softs flight simulator.

Question.

you are onboard a boeing 747-8 series.

all four engines have been lost and the plane is in a glide.

Attitude is at 43,000.

you are over the ocean.

how long do you have before you ditch into the sea?

how many miles will you glide.

closest person wins and if your into gaming and have steam i will contact you.

good luck

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By (user no longer on site)
over a year ago

You won't actually glide as a 747 with all for engines out will go into a dive and the friction will tear the wings off at that altitude and speed

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By *otSoPoshWoman
over a year ago

In a ball gown because that's how we roll in N. Devon

I have no idea.

So...

147 seconds...

And 8.4 miles.

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By (user no longer on site)
over a year ago

This gives me nightmares.

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By *eneralKenobiMan
over a year ago

North Angus

No idea, ran out of fingers

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By (user no longer on site)
over a year ago

Im not waiting to find out, where's the parachute

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By *4bim OP Man
over a year ago

Farnborough Hampshire

"You won't actually glide as a 747 with all for engines out will go into a dive and the friction will tear the wings off at that altitude and speed"

all fixed wing passenger aircraft have to be able to glide with complete engine failure or they are not allowed to go into service

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By *reyToTheFairiesWoman
over a year ago

Carlisle usually

Hmm.

I have no concept of what speed a glide would be at. Nor how much outside effects would alter the results. And honestly I've never really thought about the maths of aviation.

So, stab in the dark at 3 minutes and 7 miles.

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By *ulieAndBeefCouple
over a year ago

Manchester-ish

30 minutes and 250miles is my guess.

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By *UGGYBEAR2015Man
over a year ago

BRIDPORT

What’s the wind direction in relation to your direction of travel

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By *WantYourWifeMan
over a year ago

Nearby

I’m going for a lot further than you’d think a big piece of metal could stay in the air without power Say 200 miles and about 30 mins.

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By (user no longer on site)
over a year ago

Without knowing windspeed, wind direction, weight and (crucially) current aircraft speed, its hard to answer...

But assuming absence of a massive head or tailwind, and assuming a regular cruise speed (c. 550mph), I'd guesstimate about 140 miles

(As an avgeek and physicist, this is my kinda quiz question!!)

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By (user no longer on site)
over a year ago

5mins 16 seconds and 52 miles

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By *4bim OP Man
over a year ago

Farnborough Hampshire

Would you like some more help with this?

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By *ellhungvweMan
over a year ago

Cheltenham

I am going to guess it falls/glides in a ratio about 1:20 so 43,000ft * 20 gives 860,000ft or about 160miles.

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By *aleakalaMan
over a year ago

various

The amount of times I've seen BA009 referenced in CRM courses....and still don't know

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By *elix SightedMan
over a year ago

Cloud 8

"after PW asked why people dont start new threads i will ask a question for you all to guess the answer.

its just for fun so please do not google or youtube as my video on there will reveal the answer. and yes i am a qualified pilot who has done this in a simulator for an emergency procedure.

i also work on development of m/softs flight simulator.

Question.

you are onboard a boeing 747-8 series.

all four engines have been lost and the plane is in a glide.

Attitude is at 43,000.

you are over the ocean.

how long do you have before you ditch into the sea?

how many miles will you glide.

closest person wins and if your into gaming and have steam i will contact you.

good luck"

I expect the exact figure would be influenced by environmental factors. But at an initial cruising speed of 500mph let’s assume you lose 1,000 feet per minute for the first 23,000; 1,500 feet per minute for the next 10,000; 2,000 feet per minute for the final 10,000.

I’ll say 34 minutes gliding time.

Distance covered - you’ll lose speed at a faster rate the slower you go and the lower you are, so I’m going to guess at 100 miles.

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By (user no longer on site)
over a year ago

I guess the descend rate would kind of depend on how heavy the 747 is? With passengers or without??

With passengers it's going to descend quicker??

I'm guessing there is calculation of some description; 43000 ÷ however many knots to get the travel distance

I could be and probably way off though.

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By *4bim OP Man
over a year ago

Farnborough Hampshire

I'm pretty impressed by some of the answers so far.

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By (user no longer on site)
over a year ago

About 40 minutes and cover about 120 miles

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By (user no longer on site)
over a year ago

"The amount of times I've seen BA009 referenced in CRM courses....and still don't know"

The galangung gliding club

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By *rumpyMcFuckNuggetMan
over a year ago

Den of Iniquity

I'll just look out for Wilson still bobbing about and then jump

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By *rMonkeyMan
over a year ago

Somewhere

Most airliners have a glide rate of between 15-20:1. Anywhere between 120-160 miles depending on conditions at the time.

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By (user no longer on site)
over a year ago

200 miles.

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By *aleakalaMan
over a year ago

various

The galangung gliding club

Also the Gimli Glider and Airtransat into the Azores, all frequently used. But still don't know lol

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By (user no longer on site)
over a year ago

The galangung gliding club

Also the Gimli Glider and Airtransat into the Azores, all frequently used. But still don't know lol"

If its a rapid dismantling of the plane it's a much shorter distance and a much quicker decent

I know that from experience

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By *ansoffateMan
over a year ago

Sagittarius A

Overall system Force balance.

F = Fgravity - F(lift)

Lift is a function of velocity and aerodynamic properties of the plane. Assuming the pilot can hold the plane preventing a dive. Couldn't tell you how possible that is, not a pilot. And assuming fluctuations in velocity do not significantly effect lift. (This is an estimation afterall). I imagine in reality the skill of the pilot here is to maintain a glide speed by altering pitch etc reflexively? That's too complex a variable to model effectively as it is a human interaction.

That force balance will give a resultant downward acceleration and starting height. Convert altitude into SI units you can work out how long it will take to contact with the sea. Equations of motion.

Then you can use equations of motion to determine distance travelled as you know how long the glide is and the glide speed.

Not doing the math. Just off the top of my head haven't done Physics in years. I reckon it will give a decent estimate?

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By *ice couple ABCCouple
over a year ago

haywardsheath

Glide about 10 minutes, and distance probably 100 ish miles. X

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By *4bim OP Man
over a year ago

Farnborough Hampshire

to help.

from 43,000 ft, in 15 minutes of glide you should be about 20,000ft

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By *abioMan
over a year ago

Newcastle and Gateshead

"after PW asked why people dont start new threads i will ask a question for you all to guess the answer.

its just for fun so please do not google or youtube as my video on there will reveal the answer. and yes i am a qualified pilot who has done this in a simulator for an emergency procedure.

i also work on development of m/softs flight simulator.

Question.

you are onboard a boeing 747-8 series.

all four engines have been lost and the plane is in a glide.

Attitude is at 43,000.

you are over the ocean.

how long do you have before you ditch into the sea?

how many miles will you glide.

closest person wins and if your into gaming and have steam i will contact you.

good luck"

This is going to annoy me because I’m a nerd and I am trying to remember what it’s etops certification without googling!

I “think” it’s etops certification would have to be a big number because it would do transatlantic and transpacific flights… so possibly etops 240?

For the un nerds etops is the amount of minutes a plane is allowed to be from an airport where it would be possible to land if it were down to one engine….

So the answer is… a while!!

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By *ad NannaWoman
over a year ago

East London

I'd panic and send the plane into a spin.

I reckon we'd hit water after 45 seconds.

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By (user no longer on site)
over a year ago

30 mins 650 miles

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By *isterE ManMan
over a year ago

Taunton

Hmm shall we say 1000ft a min, so lets make it 40 mins to be safe!

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By *TG3Man
over a year ago

Dorchester

"Would you like some more help with this?"
yes

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By *4bim OP Man
over a year ago

Farnborough Hampshire

remember i need time of glide to ditching and distance travelled.

some answers are very good so far. im surprised

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By *ove2pleaseseukMan
over a year ago

Hastings

Would guess first priority is to get to an altitude you can breath normally as no power for normal oxygen. An a need to dump fule to make it tones lighter

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By *ove2pleaseseukMan
over a year ago

Hastings

So from 8.14 miles up 120 miles but only 28 minutes.

Best guess.

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By *rickie-dickieMan
over a year ago

South Durham

As I recall, a BA 747 flew through a volcanic ash cloud some years ago resulting in the temporary loss of all four engines. It then became the largest glider on the planet until the driver managed to get the engines working again. I don't remember how long this took though I imagine that to all involved it felt a lot, lot longer than it actually took. I reckon the pilot earned his pay, and then some, that day.

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By *4bim OP Man
over a year ago

Farnborough Hampshire

"As I recall, a BA 747 flew through a volcanic ash cloud some years ago resulting in the temporary loss of all four engines. It then became the largest glider on the planet until the driver managed to get the engines working again. I don't remember how long this took though I imagine that to all involved it felt a lot, lot longer than it actually took. I reckon the pilot earned his pay, and then some, that day. "

you are correct.

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By *idnight RamblerMan
over a year ago

Pershore

43,000 ft is high and air thin, resistance low. So I'm guessing a long glide lasting hours .....perhaps 1,000 miles?

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By *ranny-CrumpetWoman
over a year ago

The Town by The Cross

I cannot accurately determine the exact time and distance of a glide without additional information, such as the wind speed and direction, the weight and balance of the aircraft, and the angle of descent. However, I can provide some general information.

In a glide, the Boeing 747-8 has a glide ratio of approximately 15:1. This means that for every 15 units of forward distance traveled, the aircraft loses one unit of altitude. Therefore, if the aircraft is at an altitude of 43,000 feet, it could glide approximately 645,000 feet or 121.5 miles (assuming no headwind or tailwind, and no obstructions in the way).

The time it takes for the aircraft to reach the surface of the ocean depends on the vertical speed of descent, which in turn is affected by the glide angle and airspeed. A typical glide angle for a commercial airliner is around 3 degrees, which means the aircraft would lose about 1,000 feet of altitude for every 3 nautical miles (5.5 kilometers) of forward distance traveled. The airspeed also plays a role in the descent rate; a higher airspeed would result in a steeper glide angle and faster descent.

Without more specific information, it is difficult to provide an accurate estimate of the time and distance of the glide.

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By *ranny-CrumpetWoman
over a year ago

The Town by The Cross

I did not google , I did not you tube ...

I did sommat tho

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By *4bim OP Man
over a year ago

Farnborough Hampshire

"I did not google , I did not you tube ...

I did sommat tho

im watching you! trouble maker lol

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By *ellhungvweMan
over a year ago

Cheltenham

"I did not google , I did not you tube ...

I did sommat tho

Looks like a bit of FabGPT to me…

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By *ellhungvweMan
over a year ago

Cheltenham

What was the answer OP?

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By *am101aMan
over a year ago

swad

well as the gimli glider flew quite a long time, ill say 40 mins

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By (user no longer on site)
over a year ago

I'll say 7 minutes and 125 miles

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By *ad NannaWoman
over a year ago

East London

"I did not google , I did not you tube ...

I did sommat tho

Looks like a bit of FabGPT to me…"

She has her own plane.

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By *agic tongue mike.Man
over a year ago

Canterbury

I'm going to be too busy sticking my head between my legs and kissing my arse goodbye, to even get my calculator out and doing the math. Lol.

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By *oubleswing2019Man
over a year ago

Colchester

I promise absolutely no googling.

Just going by gut instinct.

I'm assuming a gliding descent rate of 5,000 ft a minute. I'm assuming a gliding airspeed of 20 mph. I'm assuming all other electrical systems / flaps can be operated as normal.

8 mins, 30 secs before touchdown.

Hopefully land within glide range of 2.805 miles !

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By *idlandiaMan
over a year ago

Birmingham

No mention of airspeed at loss of engines which would affect the calculations, but with a standard loss of 1000ft a minute, that would be 43 minutes till ditch

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By *heRazorsEdgeMan
over a year ago

Wales/ All over UK

I’d assume the following.

The aircraft was at normal cruising speed when suddenly all 4 engines are lost… so maybe 500mph?

I’m going to guess at a deceleration of 50mph every 30 seconds while maintaining a glide that drops 5000 (you don’t specify the units so assuming feet) a minute.

So rough maths means you’d stall before reaching the sea at that glide rate… so you’d need a steeper dive to maintain airspeed long enough… hmmm… I’m going to guess..

3 minutes so that you’re ditching while still travelling with enough airspeed to keep the nose up… say 100mph on ditching…

Ok 3 minutes… average speed over decent of 300mph, so you’d have gone 15 miles in that 3 minutes

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By *estarossa.Woman
over a year ago

Flagrante

25mins and 120 miles approx

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By *4bim OP Man
over a year ago

Farnborough Hampshire

the answer.

here is a quick video from one of the simulator streams.

https://www.youtube.com/watch?v=1mgsDUuhXyk&list=LL&index=2

the answer is: 30 minutes approx gliding.

distance 184 miles

_wantyourwife was closest with 30 minutes and 200 miles.

well done. if you would like to mail me and you have steam on you pc let me know what game you like and i'll send a activation code to you.

thanks everyone for getting involved.

i will do another question next month.

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By (user no longer on site)
over a year ago

"after PW asked why people dont start new threads i will ask a question for you all to guess the answer.

its just for fun so please do not google or youtube as my video on there will reveal the answer. and yes i am a qualified pilot who has done this in a simulator for an emergency procedure.

i also work on development of m/softs flight simulator.

Question.

you are onboard a boeing 747-8 series.

all four engines have been lost and the plane is in a glide.

Attitude is at 43,000.

you are over the ocean.

how long do you have before you ditch into the sea?

how many miles will you glide.

closest person wins and if your into gaming and have steam i will contact you.

good luck"

Big difference between attitude and altitude. Trick question.

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By *ools1964Man
over a year ago

Swadlincote

I think it would be quite far, I'll say70 miles

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By (user no longer on site)
over a year ago

I have no idea I'm too busy screaming

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