mikemalone
Active Member
I have bought a Sam James cowl. Do most builders install the alternate air function? For that matter, even with other cowls, what is the best guess as to the proportion of builders that fit one? How many times have people heard of pilots having to use it? One occasion might be a birdstrike blockage. Another, might be a clogged filter. my feeling is to keep it simple and omit it. I would be interested in the views of others.