[TheForge] hot air does not rise

[Dave Brown]

At 12:29 01/03/04, you wrote:

>I hate to start WW-3 but: hot gasses do not rise, they must be displaced
>(via gravity) by cooler gasses in order for convection to take place. Hot
>air does not have anti-gravity properties, but is can be displaced "upwards"
>by cooler air which is denser, and therefore "heavier".

Details, details, details.  It still boils down to warm/hot air rises, cool 
air sinks.  Exhaust from a gas forge is warm/hot and will move upwards, not 
towards the floor.  The mechanism of the action is moot.  It happens.  The 
CO and CO2 and the H2O and other byproducts of the propane forge combustion 
will rise.

Dave Brown
Heritage Smithing
Green Bay, WI