I don't think a Seneca (with boots) has a greater weather penetration capability than a TB20/21 with full TKS. Where would it come from? TKS is a damn good system.
10540
Correct me if I am wrong but I didnt know the TB20/21 is approved into known icing ?
We can all go down the statistics line about singles V twins arguement.
All I know is that 100 miles out to sea routing ireland to Spain I am very happy about the second engines purring away.
Above solid fog banks I am very happy about the second engine purring away.
At night I am very happy with the second engine purring away and statistics dont mean a jot when the engine goes bang in the middle of no where.
Solid IMC in bad weather same arguement
Etc etc etc.
Problem is I dont trust half a million parts whirring away in a piston engine
Pace