Talk:Thermal airship

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Question - Why is the performance and hence operating window of thermal airships so poor, given that helium airships can acheive speeds of 60 mph and greater. Is it to do with the non rigid and low pressure envelope acting as an airbrake? 80.6.18.7 12:59, 28 May 2007 (UTC)

It's because thermal airships of the type described in the article are not highly pressurised. In fact they cannot be highly pressurised because they have a large hole at the bottom to let the hot air in. As a result, high speeds (or high winds for that matter) cause them to deflate. -- Derek Ross | Talk 19:31, 17 December 2007 (UTC)

Question - what makes these thermal airships different to "hot air balloons" ?

Sure they have the similarity in shape to blimps / zepplins etc but I have seen cigar shaped "hot air balloons" offering tours?

Answer - thermal airships are powered, i.e. they have propelers to give them thrust while hot air balloons do not. —Preceding unsigned comment added by 66.91.30.35 (talk) 13:14, 12 December 2010 (UTC)

Clarification - Its not at all obvious from the article why these are a new inventions from 2006 rather than a different body style and possibly slightly different materials than the common hot air balloon

123.243.66.72 (talk) 20:37, 25 October 2010 (UTC)

Steam

Steam airships are not primarily thermal airships. Most of the lift comes from the difference between the molar weight of water (18) and air (~29). Some of the lift from hot "air" that includes combustion products is from the water gas in those products, but this is a minor component of lift. True steam airships would have much higher specific lift than hot-air / thermal airships. Enon (talk) 22:43, 5 August 2010 (UTC)

Merge

Does this page contain, or have to potential to contain, any information of note that would not belong in the main page on airships? If not, this page may not be needed, and any unique information it has could be incorporated into the main airships page, perhaps with its own section. Mr.1032 (talk) 00:41, 25 December 2017 (UTC)