Sponsor Message:
Civil Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Hot-air Balloon To 21000 Meters: Weight?  
User currently offlineTimz From United States of America, joined Sep 1999, 6813 posts, RR: 7
Posted (8 years 8 months 3 weeks 4 days 22 hours ago) and read 1710 times:

The AP story on that hot-air balloon altitude record (21000+ meters) said the balloon weighed 44 tons (2000-lb tons, I assume). That can't be right, can it?

At 21000 meters on a standard day air density is 0.075 kg per cubic meter, so 40 metric tons of air would fill a sphere 100 meters in diameter. So a 100-meter spherical balloon will lift 40 metric tons minus whatever the air inside the balloon weighs. We could figure that out, if we knew the temperature inside the balloon-- but surely the balloon couldn't weigh anywhere near what they said?

Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Hot Air Balloon Crashes Into Pylon posted Mon Apr 17 2006 19:40:10 by Cosec59
AC (Air Canada) To Deploy E190 On SAN-YYZ posted Tue Nov 28 2006 02:53:22 by DCAYOW
Air India To Lease 4 Boeing Widebody Aircraft posted Mon Nov 13 2006 21:50:35 by B742
Air Transat To Fly YYZ-LHR May 2007 posted Thu Nov 9 2006 05:16:59 by CYQL
Mission Air LCK To Points Beyond Delayed posted Sun Nov 5 2006 17:42:32 by Panaman
Air Paradise To Be Resurrected Out Of DPS posted Sun Nov 5 2006 08:02:08 by Jimyvr
Air Transat To BCN, VIE, VLC & AGP In 2007! posted Thu Nov 2 2006 23:32:59 by Thenoflyzone
Air Luxor To Be Reincarnated As Fly3x2.com posted Thu Nov 2 2006 20:55:40 by BuyantUkhaa
Air China To Order B777? posted Wed Nov 1 2006 08:37:41 by Smeagol
Air France To BEY : First Post War Results posted Thu Oct 26 2006 13:46:33 by FlySSC