Originally Posted by Piper J3
Does the factory demo RV-12 still have original vented fuel cap or has it been upgraded to the new fuel tank vent?
The reason I ask is that I believe the original vented cap is probably better to control air exchange in the fuel tank when aircraft is parked for extended periods of time.
If you mean the Red ULS demonstrator? It was the airplane that the the upgraded vent was system was developed on, so yes it has the upgraded vent system and undrilled cap. We have never had any operational issues with it.
It actually isn't part of the demo fleet anymore though. It has been reassigned to being a company flying club airplane, though so we are still able to keep up with monitoring condition as it continues to build hrs.