karodrinker
Trad climber
San Jose, CA
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Topic Author's Original Post - Jun 24, 2012 - 10:34pm PT
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Ok science fans, how big would a balloon need to be to haul a 150lb bag? Seems like maybe an easy way to haul?
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apogee
climber
Technically expert, safe belayer, can lead if easy
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Jun 24, 2012 - 10:40pm PT
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Oh, sh#t...that's a funny question.
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rockermike
Trad climber
Berkeley
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Jun 24, 2012 - 10:43pm PT
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I think of this frequently. Maybe helium would work better. You could float your pig up BEFORE climbing the pitch. lol
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Captain...or Skully
climber
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Jun 24, 2012 - 10:45pm PT
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You still have that Lead before you. On many leads, that's plenty.
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Mungeclimber
Trad climber
the crowd MUST BE MOCKED...Mocked I tell you.
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Jun 24, 2012 - 10:53pm PT
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I'm with apogee on this one. lol
wind would blow that haul bag all over the place and get hung up.
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Spider Savage
Mountain climber
The shaggy fringe of Los Angeles
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Jun 25, 2012 - 06:48am PT
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Wind.
and
Yer gonna die!!!
I'll bet Tami could concoct a really good cartoon to go with this post.
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surfstar
climber
Santa Barbara, CA
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Jun 25, 2012 - 07:59am PT
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Eff the bag - that's a new ropegun technique!
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rockermike
Trad climber
Berkeley
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Jun 25, 2012 - 08:05am PT
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how about attaching a hero cam to a balloon. then you can get bird's eye shots of your hero antics.
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karodrinker
Trad climber
San Jose, CA
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Topic Author's Reply - Jun 25, 2012 - 08:08am PT
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I need calculations people! Ed? how big does the balloon have to be?
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Chaz
Trad climber
greater Boss Angeles area
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Jun 25, 2012 - 08:36am PT
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You're going to need at least a five-foot ballon if you want it to lift a pocket camera.
As mentioned earlier, if the breeze is blowing at all, you're screwed. ( get a kite )
Illegal? Who knows? Here's a shot someone got of Delicate Arch using a helium balloon to lift his camera:
http://www.flickr.com/photos/7934164@N02/4361931802/
If you need to lift something heavier than a pound or two, you'll need a huge balloon.
And helium, even though it's cheaper here than anywhere else, it's still damned expensive.
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Grampa
Trad climber
OC in So Cal
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Jun 25, 2012 - 08:44am PT
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We have a helium mini-blimp, about the size of a motor home, that can lift 40lbs at 9000 ft, so you need four of them. What color would you like?
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Tony Bird
climber
Northridge, CA
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Jun 25, 2012 - 08:49am PT
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haha--just in time to keep the discussion going from the el cap drop-a-bag thread.
you'll need a safety parachute for this. i understand that field experiments have already been conducted. as for the hot air supply ...
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Ron Anderson
Trad climber
USA Moundhouse Nev.
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Jun 25, 2012 - 08:51am PT
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never gonna work,, dirbags will huff all the helium out of the baloons- theyll be singing alvin and the chipmunks tunes along the base!
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Moof
Big Wall climber
Orygun
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Jun 25, 2012 - 09:34am PT
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Depends on how hot the air is. let's say you heat the air up by 90F (50K) for yuks.
The density would be governed by the ideal gas law PV=nRT, with temperature being 350K instead of ambient at 300K. So density would be 300/350, or .857 as dense. Air is roughly 0.8 kg/m^3 at 7000' (http://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html), or 1.76 lbs/m^3, and by heating it you are getting a bouyancy of (1-0.857)*1.76 lbs/m^3, or 0.25 lbs/m^3. So for a 150 lb haul bag you need 600 cubic meters roughly (not accounting for the weight of the balloon).
The volume of a sphere is 4/3*pi*r^3, so that works out to a 34 foot diameter hot air balloon.
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Mighty Hiker
climber
Vancouver, B.C.
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Jun 25, 2012 - 09:49am PT
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Well, with four motorhome size helium balloons overhead, you could probably sell advertising - although Tom E may not take your photo, then. The balloons would be handy on those high gravity days, plus might even deflect falling objects.
Ron can surely fill us in on balloon sledding.
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toadgas
Trad climber
los angeles
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Jun 25, 2012 - 09:52am PT
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good on you thinking outside the box like this! El Cap needs more spectacle than already exists
several thousand helium-filled party balloons have lifted men who weigh 150lbs or greater thousands of feet into the atmosphere...plus if a few 100 burst you got some wiggle room
but why not just pay some dirtbag characters to slowly winch your bags up alongside you from the top, with a 2800ft static line, attached to your harness with a 200ft leash? it would draw less attention than 5,000 latex ballons
keep it real, man
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Toker Villain
Big Wall climber
Toquerville, Utah
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Jun 25, 2012 - 09:54am PT
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Can be deflated in a wind storm, which is good, but nobody is going to keep burning fuel while the leader is climbing so deflation at each belay is mandatory.
Therefore the REAL issues are ease of re-inflation, a remote control for the burner, and the increase in overall payload to accommodate rig and fuel.
Speaking from experience it is more fun to ride hot air balloons than deal with them.
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karodrinker
Trad climber
San Jose, CA
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Topic Author's Reply - Jun 25, 2012 - 10:05am PT
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this is gonna be sweet!
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Ron Anderson
Trad climber
USA Moundhouse Nev.
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Jun 25, 2012 - 10:08am PT
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baloon sledding,,,HHHHMMMMMMMMMMMM...;-0
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