Carburetor heat info?

[bongodriver]

500kph is only 270kts....spit should do that.

but speed has no effect, it's only OAT and visible water vapour, in the company I fly for (prob based on an industry standard) airframe icing can be anticipated between +10 deg to -40 deg and then only when in IMC or any precipitation, we like to avoid using anti-ice because it makes it harder to slow dow during descent, we certainly manage to fly faster than 500kph in the Learjet.