Forgot to add...hot props and boots will cover you 99.9% of the time in Oz...I have VERY rarely ever had enough ice on to bother cycling the boots but that is just my experience...with TN you'll be in clear air so quick not much will have time to accumulate. This is not 'known ice' approved of course, neither is the TKS weeping wing system which is a lot more hassle and expence...but it will give you time to escape the ice.
Personally boots would not be high on my 'must have' list.
Edit: The TSIO520 L/LBs on early 58Ps (310hp from memory) were light case and had a 1400hr recommended TBO..the later TSIO520WBs had heavier cases and a 1600hr TBO..but were developing 325hp so chances of seeing 1600 hrs were remote. The IO550C is on new 58s...I don't know the difference between a IO550B and 550C but would think it will be merely some accessory bolted on somewhere different due to the different cowl on a Baron as opposed to my A36. They have a 1700hr TBO and a 7th stud holding on the cylinders, heavy crankcase and different welding technique for added strength...often see more than 1700hrs operated sensibly.
Last edited by Chimbu chuckles; 13th May 2007 at 05:35.