|Large square-flange eyeball vent. Made from aircraft-grade 6061-T6 aluminum and hard anodized, it weighs just 5 oz. and mounts in a 2-3/4" hole. The mounting flange is 3" square with a 2-1/2" mounting hole pattern, and has 25 degrees of freedom from the vent centerline (50% more than in our first generation vents.) This is a direct replacement for the "whisperflo" black plastic vents. Flows 30% more air and eliminates 99% of the leakage associated with the plastic vents when closed.|
I also have a Glasair Sportsman and replaced the plastic eyeball vents. The plastic ones leaked in the winter, were impossible to close fully. The new ones allow much greater airflow in the summer and eliminate leaking in the winter. Easy to control with one hand. Highly recommended.
This was used as direct replacement of plastic eyeball vents in a Sportsman 2+2. This vent is a vast improvement over the old one in 2 ways. Fully closed with no leaks (nice feature in winter cold). And it provides an estimated 50 percent increase in airflow when fully open (nice feature in summer heat).
Easy to install and operate (no more fiddling), but what I was really surprised is that it must double the airflow (maybe more)...and for flying Texas, that is wonderful. Maybe a bit pricey, but definitely get what you pay for.
Solid. Works like a charm.
This vent would use a 2-3/4" hose ducting.
The inner diameter of the vent is 1.88".