For us little guys, ANY ICE AT ALL is forbidden. (unless the aircraft is
certified for known ice, which very few spam cans are).


Forbidden by what?


The laws of physics, ultimately. The FARs before that (though I can't find a
specific rule, it would certainly be classified as "careless and reckless" if
it led to an incident - it might be in the certification rules for aircraft,
same as aerobatic stuff and equipment required.) The FAA has made it clear
that unless the aircraft is certificated for known ice, you can't even legally
enter forecast ice.

Now, to open another can of worms, the FAA has produced an excellent video on
icing (which they show at various safety seminars) in which they take the
viewer through several flight scenarios. Well worth watching several times.

However, I take a bit of an issue with one thing - the "unprotected"
(non-de-iced) airplane pilot is flying in the clouds in non-icing conditions,
towards a front that contains ice (there is ice above). On takeoff the weather
briefing indicated that the front would not be an issue, but the weather moved
in faster. Temperatures go down, and he gets ice. Now what?

IN subsequent discussion, one possibility is to climb and get on top of the
overcast, and it would be reasonable if the destination were clear. (mabye
also in other situations). This would be legal (he's already in ice and trying
to get out). However, if he were not YET in ice, it would be illegal
(deliberately entering icing conditions). Seems to me that at that point,
(he's in non-icing conditions, non-icing is behind him, temps going down , his
destination ahead of him, and ice ahead of him) continuing would be illegal,
but the FAA guy didn't have the opinion that continuing would constitute
"deliberately entering ice..." and it's all a matter of bablance.

Well, yes but...

Jose

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