A Conversation for The Quite Interesting Society
QI - flight of the navigator
Mu Beta Started conversation Sep 11, 2008
Don't know how well known this one is...I can but try.
What must you take a plane over, but in no circumstances a helicopter?
Klaxons and QI points available for rubbish and interesting answers respectively.
B
QI - flight of the navigator
TRiG (Ireland) A dog, so bade in office Posted Sep 11, 2008
A rough plank of timber?
TRiG.
QI - flight of the navigator
Icy North Posted Sep 11, 2008
That klaxon said "I do the jokes, sunshine". 
QI - flight of the navigator
Br Robyn Hoode - Navo - complete with theme tune Posted Sep 11, 2008
Oh, isn't this Power Lines (perhaps more specifically those gigantic ones?) and/or telephone lines?
I read Seven, y'see, or I'd not know this!
QI - flight of the navigator
Whisky Posted Sep 11, 2008
Hmm, it's the word 'must' in the question that's getting me...
About the only thing I can think of that would be a 'must' is a defined altitude for a defined area...
I.e.: If you were flying over london in a helicopter you would have to fly at less than 1000 feet whereas if you were in a plane you'd have to fly higher than 1000 feet.
QI - flight of the navigator
Godless-Years Posted Sep 11, 2008
The thermosphere?
I'd imagine a helicopter would not fare so well in the thermosphere. 
QI - flight of the navigator
Godless-Years Posted Sep 11, 2008
Actually the meosphere....
A plane must go over the stratosphere...
QI - flight of the navigator
Mu Beta Posted Sep 11, 2008
The word 'must' is deliberate, although possibly for slightly oblique reasons.
I like your thinking, but no-one is close yet.
B
QI - flight of the navigator
Icy North Posted Sep 11, 2008
An anti-helicopter mine?
http://www.defense-update.com/products/a/AHM.htm
QI - flight of the navigator
Rod Posted Sep 11, 2008
Whirling blades outside the fuselage, Hmm, some planes too.
Not a de-Gaussing pad ?
QI - flight of the navigator
Mu Beta Posted Sep 11, 2008
I'm intrigued by the helicopter mine, and might consider a bonus point, but no.
B
QI - flight of the navigator
Whisky Posted Sep 11, 2008
Could be stall speed in a straight line, but there again, what would the stall speed of a helicopter fitted with counter-rotating blades be?
And the other point is that a helicopter's blades will often stall if it's in a tight turn.
QI - flight of the navigator
Mu Beta Posted Sep 11, 2008
Velocity and other scientific considerations are an issue, but you don't need to have any deep knowledge of them to answer this.
I'm looking for a specific location.
B
QI - flight of the navigator
A Super Furry Animal Posted Sep 11, 2008
Is it the eye of a hurricane? The rotation of the helicopter's blades will effectively be negated by the speed of the winds rotation?
RF
QI - flight of the navigator
HonestIago Posted Sep 11, 2008
Is it specific air-lanes/flight paths?
*waits for a 
*
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QI - flight of the navigator
- 1: Mu Beta (Sep 11, 2008)
- 2: TRiG (Ireland) A dog, so bade in office (Sep 11, 2008)
- 3: Mu Beta (Sep 11, 2008)
- 4: Icy North (Sep 11, 2008)
- 5: Mu Beta (Sep 11, 2008)
- 6: Br Robyn Hoode - Navo - complete with theme tune (Sep 11, 2008)
- 7: Whisky (Sep 11, 2008)
- 8: Godless-Years (Sep 11, 2008)
- 9: Godless-Years (Sep 11, 2008)
- 10: Mu Beta (Sep 11, 2008)
- 11: Icy North (Sep 11, 2008)
- 12: Rod (Sep 11, 2008)
- 13: Mu Beta (Sep 11, 2008)
- 14: swl (Sep 11, 2008)
- 15: sidneylopsides (Sep 11, 2008)
- 16: Whisky (Sep 11, 2008)
- 17: Mu Beta (Sep 11, 2008)
- 18: A Super Furry Animal (Sep 11, 2008)
- 19: Mu Beta (Sep 11, 2008)
- 20: HonestIago (Sep 11, 2008)
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