On 2 Jan 2006 19:24:27 -0800, "
wrote:

I may have talked about this idea before but it was inspired when I was
doing blister repairs on a boat and used a heat gun. The heat gun
literally drove water from the hull and it poured out of adjacent
blisters so...........Why waste time heating the glass when you really
want to heat the water and other polar molecules.

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What are the other heating possibilities other than microwaves that
require shielding? Magnetic resonance device or something similar?

Even MRI exciting frequencies of sufficient power density to work would
require shielding. Everything requires shielding, it's simply what
kind and how much. Do it in a metal building and no prob outside.

wrote in message
oups.com...
Even MRI exciting frequencies of sufficient power density to work would
require shielding. Everything requires shielding, it's simply what
kind and how much. Do it in a metal building and no prob outside.

I suspect the problem with microwave is that the "cavity" or metal shielded
enclosure needs to be tuned to the microwave frequency wavelength, otherwise
little heating will take place and the standing wave ratio will destroy the
microwave generator.

Induction heating? Nope - needs to be a metal.

Big ass oven? Maybe - wouldn't need to set the temp too high to dry out
water, but might require a long bake.

I know! A scanning CO2 chemical laser! You could program it to scan the
whole hull, similar to the prop measuring systems, except much higher power.

I watched a guy finish the edges of saw cut, 4" thick bluestone by spraying
water from a mist spray bottle until the edge surface of the bluestone was
saturated, then immediately heating it with an oxygen/acetylene torch.
Bluestone is very porous and absorbs the water. The torch then heated the
water very rapidly so it boiled and converted to steam before it could drain
out of the bluestone. The water basically "exploded" in a micro way,
leaving the bluestone edges with a natural, weathered, micro sandblasted
appearance.

Eisboch

" wrote:
I may have talked about this idea before but it was inspired when I was
doing blister repairs on a boat and used a heat gun. The heat gun
literally drove water from the hull and it poured out of adjacent
blisters so...........Why waste time heating the glass when you really
want to heat the water and other polar molecules.


Water is non-polar

Wayne.B wrote:
What are the other heating possibilities other than microwaves that
require shielding? Magnetic resonance device or something similar?


That'd work. So would a laser.

I wonder if playing really awful music, very loud, would
drive blisters away? Would that work better if the speakers
were inside the boat or outside?

DSK