[TheForge] Slack tank

[xlch58 at swbell.net]

The air pillow is very bouyant, but the pool cover it supports is not.  
The air pillow caused the cover to peak and shed water better and 
insures a dead layer of air (insulation) between the pool water and the 
cover.   Beyond that, the purpose of an ice compensator is to give the 
ice someplace to go, much like freeze plugs on a car (which I have never 
had save a block, but have had destroy one from overheating when they 
rusted out and ruptured).   What would be the mechanism whereby 
something floating above the ice layer would provide protection?

Charles


On 12/17/2010 4:05 PM, Bruce Freeman wrote:
> https://secure3.milestechnologies.com/mybluepool/products/details.asp?categoryid=25&dealerID=21&productID=123
>
> (Air pillow to thwart ice damage to swimming pool.)
>
> On Fri, Dec 17, 2010 at 4:03 PM,<xlch58 at swbell.net>  wrote:
>> I will bet that it isn't that simple.  I am guessing that if the item is
>> too buoyant then there will not be enough of it submerged to assist.
>> The wood probably avoids getting keyed into the ice because of the non
>> linear density of water near freezing.  This would make the wood bob in
>> slow motion.
>>> <snip>
>> Charles
>>