Hi all!
I was interested in cowl of the dorade ventilation device. I see that there is a standard type, as recommended in the assembly instructions, and also there is mushroom-type ventilation.
I would like to understand how air flows and what are the benefits.
In the standard case, as I understand it, it works like an air intake. That is, air enters only when it blows directly into the pipe. If you have a pipe looking forward, and the wind is blowing from the side or behind, then this will be ineffective. Right?
Another case is mushroom-type ventilation device. This is a round device, it does not require a specific wind direction. When the wind blows from either side, it works to extract air from the cabin. Why is it not so popular?
Why is it preferable to force air into the cabin, rather than pump it out through the ventilation?