DirkkDiggler
Well-known member
- Joined
- Feb 13, 2004
- Posts
- 422
Flew C-310's, C-208's and Barons out of Minnesota for 2 years and here's what worked for me:
1. Preflight - Look at the temps aloft and find the freezing level. Also check the cloud tops. Pireps are great if you can find them and they are relevant.
2. As soon as you start picking up ice, climb (unless you know for sure that there is no icing below you, which I found to be rare). You will always be able to descend again if you can't get out of the ice, but if you descend initially, you may not be able to climb again.
3. Watch your airspeed. At Airnet we had a minimum speed in icing conditions. I believe it was 130 or something like that. If you can't maintain your speed above that, sacrifice altitude for airspeed and get out of there.
4. Always have an escape plan in case you can't get out of the ice, and like me the boots break. If you've always got a plan, you should be alright.
5. NASA did a study on ice bridging and PROVED it to be a fallacy. Airnet's policy was to blow the boots as soon as you start picking up ice. Don't wait for a lot of ice to accrue because these boots suck anyway and if you wait, you've got that much more on there that may not come off.
Following these rules, I only had to divert once when the boots failed on the Caravan and my airspeed was falling rapidly. Fortunatly I had a plan to escape and I had the altitude to make it happen because I climbed the second I started picking up ice. You should be fine, and remember that if it's too bad, you can always call the company and say that you'd like to wait an hour to see if things get better.
P.S. Never use Type IV anti-icing fluid on a piston twin. This stuff is meant to shear off during take-off and that really only happens at speeds that jet aircraft fly. The stuff can actually inhibit your lift at takeoff, just when you need it most.
1. Preflight - Look at the temps aloft and find the freezing level. Also check the cloud tops. Pireps are great if you can find them and they are relevant.
2. As soon as you start picking up ice, climb (unless you know for sure that there is no icing below you, which I found to be rare). You will always be able to descend again if you can't get out of the ice, but if you descend initially, you may not be able to climb again.
3. Watch your airspeed. At Airnet we had a minimum speed in icing conditions. I believe it was 130 or something like that. If you can't maintain your speed above that, sacrifice altitude for airspeed and get out of there.
4. Always have an escape plan in case you can't get out of the ice, and like me the boots break. If you've always got a plan, you should be alright.
5. NASA did a study on ice bridging and PROVED it to be a fallacy. Airnet's policy was to blow the boots as soon as you start picking up ice. Don't wait for a lot of ice to accrue because these boots suck anyway and if you wait, you've got that much more on there that may not come off.
Following these rules, I only had to divert once when the boots failed on the Caravan and my airspeed was falling rapidly. Fortunatly I had a plan to escape and I had the altitude to make it happen because I climbed the second I started picking up ice. You should be fine, and remember that if it's too bad, you can always call the company and say that you'd like to wait an hour to see if things get better.
P.S. Never use Type IV anti-icing fluid on a piston twin. This stuff is meant to shear off during take-off and that really only happens at speeds that jet aircraft fly. The stuff can actually inhibit your lift at takeoff, just when you need it most.