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Google Loon balloon crashes near Yakima

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Re: Google Loon balloon crashes near Yakima

#11
post #8
post #2

Guess that's a hazzard of balloons all over the place. Hope one does not take out a jet.

Jet aircraft are a little more manoeuvrable than power lines.

At the speed your average jet is travelling and the fact that approximately half the traffic is at night I'd hope for a radar transponder on the balloon (or at least some kind of reflector) because I highly doubt you'd be able to respond in time when going on visual cues alone, you'd need at least a few kilometers warning.

Re: Google Loon balloon crashes near Yakima

#12
post #7

Earlier quoted context omitted.

Indeed they are launched all the time. But, we are talking about the case that the practice becomes popular and the skies become a dense minefield.

That's an interesting back of the envelope question to work out. Something with volume occupied by all aircraft aloft at any given moment, volume of all balloons at any given moment, the total volume of the shell in which commercial air traffic takes place. I think we can safely forget about the chances of spyplanes hitting balloons, the volume of space versus the number of spyplanes would make that a non-issue, even…

You lost 6 orders of magnitude to this IMHO:

5610 million km^3 = 5.61 * 10^3 * 10^6 km^3 = 5.61 * 10^9 km^3 = 5.61 * 10^9 * 10^9 m^3 = 5.61 * 10^18 m^3

But you said the resulting volume was = 5.61 * 10^12 m^3.

I think you forgot that it was 5610 million km^3.

Re: Google Loon balloon crashes near Yakima

#13
post #12

Earlier quoted context omitted.

That's an interesting back of the envelope question to work out. Something with volume occupied by all aircraft aloft at any given moment, volume of all balloons at any given moment, the total volume of the shell in which commercial air traffic takes place. I think we can safely forget about the chances of spyplanes hitting balloons, the volume of space versus the number of spyplanes would make that a non-issue, even…

You lost 6 orders of magnitude to this IMHO: 5610 million km^3 = 5.61 * 10^3 * 10^6 km^3 = 5.61 * 10^9 km^3 = 5.61 * 10^9 * 10^9 m^3 = 5.61 * 10^18 m^3 But you said the resulting volume was = 5.61 * 10^12 m^3. I think you forgot that it was 5610 million km^3.

Ah! I knew there was something terribly wrong there somewhere (and probably that's not the only thing). Thank you very much, I'll edit the comment to fix it.

Re: Google Loon balloon crashes near Yakima

#14

In the 90s, I would sometimes trip over ethernet cables that had been strung between server racks, across an aisle. Will this be the decade where I get to experience being struck by falling routers and switches, far from any data center? (EDIT: Simply remarking on novelty of problem and upward growth of network. No criticism of any firm implied or intended.)

I took down an AS/400 server once by tripping over two Type 1 token ring cables[1] that had been plugged together in the middle of a walkway. No-one ever owned up to that setup.

[1] http://en.wikipedia.org/wiki/File:IBM_hermaphroditic_connect...

Re: Google Loon balloon crashes near Yakima

#17
post #7

Earlier quoted context omitted.

Indeed they are launched all the time. But, we are talking about the case that the practice becomes popular and the skies become a dense minefield.

That's an interesting back of the envelope question to work out. Something with volume occupied by all aircraft aloft at any given moment, volume of all balloons at any given moment, the total volume of the shell in which commercial air traffic takes place. I think we can safely forget about the chances of spyplanes hitting balloons, the volume of space versus the number of spyplanes would make that a non-issue, even…

The problem is that jetliners don't have all that space you calculated to play around in. They actually have a few well defined corridors and altitudes in which they can operate - the straight lines drawn from one VOR (effectively equivalent to a major airport) to another at 1,000 foot intervals.

Detours are costly due to time and coordination (air traffic control, other aircraft), and reacting to seeing a balloon and moving the aircraft isn't that easy when you're traveling at 300+ MPH in an aircraft which turns like a cargo ship. And that's assuming you can even see the balloon in time to react in the first place.

And that's just the commercial jetliners. Private jets go higher and faster (about 50,000' and 700mph), while GA aircraft fill the skys below 14,000'.

Granted, this still leaves a lot of room in between these major aircraft corridors, but if a balloon should ever intersect with one of them, it's going to cause havoc, even if there's never an actual balloon/aircraft incident.

Re: Google Loon balloon crashes near Yakima

#19
post #8

Earlier quoted context omitted.

Jet aircraft are a little more manoeuvrable than power lines.

At the speed your average jet is travelling and the fact that approximately half the traffic is at night I'd hope for a radar transponder on the balloon (or at least some kind of reflector) because I highly doubt you'd be able to respond in time when going on visual cues alone, you'd need at least a few kilometers warning.

They have ADS-B transponders. You see them sometimes on flightradar24 floating around at FL650.
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