No way are there enough balloons to lift a car. Maybe a 170lb guy?
__________________
MKIII, 302 FMS Crate, GT40 Heads, Quick Fuel carb, TK0500 Mid-shift, 3-Link, 300 RWHP & Trq. Finally done after two years. I think I will call her Black Betty
"A parent's only as good as their dumbest kid. If one wins a Nobel Prize but the other gets robbed by a hooker, you failed."
There was a mythbuster episode a couple years ago where they tried to lift a person. It took over 5000 balloons to lift a 120lb girl.
__________________ gordon@levyracing.com Pro Builder and Go Fast Specialist
99/2000 NASA PSO Champion in a FFR
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Bill D
FFR 3378 - 503 BB, $old and missed
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yes like Gordon said there was a Mythbusters episode about this. they lifted the producer's daughter... they were able to do it with loads of balloons but they JUST got her off the ground.
my friend is the sound tech for this show, he said this episode was a lot of fun. they had everyone on the set blowing up helium balloons.
their problem was that the balloons were naturally popping at the same rate they could add them.
it could positively done with say, kevlar balloons, weather balloons, a mini-goodyear blimp, but not standard-issue balloons.
__________________ gordon@levyracing.com Pro Builder and Go Fast Specialist
99/2000 NASA PSO Champion in a FFR
2005 FFR Challenge West coast Champions 2nd 2005 Nationals Sponsor for Tony B. ST-2 National Champion 2007
2009 TTC runner up-2010 TTB Runner up
Over 155 Turnkey FFR's in 16 years and still counting
That was the urban legend that prompted Mythbusters to try it. They deemed it busted.
__________________ gordon@levyracing.com Pro Builder and Go Fast Specialist
99/2000 NASA PSO Champion in a FFR
2005 FFR Challenge West coast Champions 2nd 2005 Nationals Sponsor for Tony B. ST-2 National Champion 2007
2009 TTC runner up-2010 TTB Runner up
Over 155 Turnkey FFR's in 16 years and still counting
man, these videos are getting out of controll. Yea, we get it, you can use a $50 computer program...
__________________
MK4 delivery 12/17/11
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LOL!! The number I gave would only balance her 120 lb weight. 5000 ballons would only provide 17.5 lbs of additional lift so she was probably pretty close. And they may have had 11.5" ballons.
2006: 2/14 Delivery by Stewart Transport, 8/15 becomes a roller, 8/26 drivetrain installed, 10/15 first engine start, 12/23 wiring completed, 12/31 body test fit
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If they filled them with hydrogen, then they would be 4 times as boyant? Didn't google it, just thinking since H is 1/4 the atomic weight of He....
Greg
No, H2 is diatomic so each molecule weighs 1/2 half as much not 1/4.
Buoyancy comes from displacing air (1.205 kg/mmm) with another gas.
Assuming 1 cubic meter:
Helium displaces 1.205 kg but itself weighs .1664 Kg giving a net buoyancy of 1.041 Kg.
Hydrogen displaces 1.205 kg but itself weighs 0.0899 Kg giving a net bouyancy of 1.115 Kg.
Hydrogen is only 7% more buoyancy than Helium.
This is why airships designed for Helium were able to use Hydrogen instead after the United States embargoed Helium exports.
Mike
__________________
"All that is necessary for evil to triumph is for good men to do nothing."
Frequently the justification for doing nothing is the exaggeration of lesser evils.
No, H2 is diatomic so each molecule weighs 1/2 half as much not 1/4.
Buoyancy comes from displacing air (1.205 kg/mmm) with another gas.
Assuming 1 cubic meter:
Helium displaces 1.205 kg but itself weighs .1664 Kg giving a net buoyancy of 1.041 Kg.
Hydrogen displaces 1.205 kg but itself weighs 0.0899 Kg giving a net bouyancy of 1.115 Kg.
Hydrogen is only 7% more buoyancy than Helium.
This is why airships designed for Helium were able to use Hydrogen instead after the United States embargoed Helium exports.
Mike
How'd that work out for them?
__________________
Paul
It's finally here. FFR 4017 MKII
Pretty darned well for nearly 40 years. The 20 or so that exploded amounted to a pretty low accident rate for the time.
Compare to another mode of transportation that had an ~40 year run: the Mississippi riverboats. 500 were wrecked by steam boiler explosions resulting in 4,000 fatalities.
Mike
__________________
"All that is necessary for evil to triumph is for good men to do nothing."
Frequently the justification for doing nothing is the exaggeration of lesser evils.
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