[Porsche-O-Phile]

SOP when I flew cargo was all deice on (prop heat, pitot heat, windshield heat, etc.) in any visible moisture below 10C or at the PIC's discretion other times.

Anti-ice was leading edge boots and the most unnerving thing is letting the ice build up before you use 'em. If you get an itchy trigger finger you can pop the boots too early and now the ice won't break away and it just provides a nice icy surface for new ice to cling to that the boots can't/won't remove. You have to wait until it's about 3/4"-1" thick.

The PA31 can carry a TON of ice (maybe literally - MGW was 7,000 and I swear I've landed with at least 1,000-1,500 pounds of ice packed on one) as can the Be99 turboprop, both of which I flew.

Never did like flying ice, but having some degree of anti/de protection is HUGELY comforting.

Supposedly the Challenger 602 is actually certified for flight in known SEVERE icing - this is from a guy I know that is Captain on one. I find that almost unfathomable since the defintion of "severe" is a rate of accumulation in excess of control systems ability to keep up with it - so I'm assuming this is "severe" as reported by PIREP in other, "lesser" aircraft types since by definition if it's YOU saing "severe" you're basically saying "our systems can't keep up with it", which would never be allowed - at least I wouldn't think so...

The definitions are very weird when it comes to icing anyway. We were always told that for it to be "known icing" you actually had to be the one in it. Even with a PIREP in hand along your intended route we'd be asked to "go take a look and if it's bad, you can always turn around or divert". So "known" isn't really "known" unless it's you - something to keep in mind if you're flying an aircraft not certified for flight in known icing conditions and you ever have to request an altitude change (be careful what you say on the radio) or declare an emergency due to icing conditions. You can shoot yourself in the foot easily. Keep a stack of ASRS forms in your bag - I always did and still do!