Moderators: richierich, ua900, PanAm_DC10, hOMSaR
Starlionblue wrote:We very seldom use wing anti ice.
greg85 wrote:The real answer here is “Venturi effect”. Look that up. The air gets colder.
Starlionblue wrote:We very seldom use wing anti ice. I never have, and most guys I talk to may have used it a couple of times in decades. As ArcticFlyer says, it has to be "really bad", like extended holding at -2 in clouds or something.
Engine anti-ice is routinely used from +10 Total Air Temperature to -40 Static Air Temperature. With moisture in the air, the pressure changes in the intake can easily cool air from +10 to below freezing. As mentioned, below -40 moisture is ice crystals already. It won't be an issue.