by Darick » Wed Mar 30, 2016 9:07 pm
Installed the fuel tank and decided to go with the tank vent that protrudes straight up. After reading Peter Anson's website, I bought his check valve to use with this tank vent. It has a small Teflon ball that keeps fuel from spilling out the vent in case of minus "g" maneuvers or an unfortunate upside down landing event.
The space between the vent fitting and the new style gas cap is really small, perhaps 1/64". I wonder if Sonex planned it this way or just a fortunate set of circumstances.
Also my building tolerances could have easily put that rivet in a worse position, i.e. too close to the vent.
Gas tank cap and vent view.
![Image](http://s25.postimg.org/qjei6hien/image.jpg)
Close up view. You can just barely see light between the cap and vent. The fitting nut has to be turned with the flat of the hex "just right" or it would scrape the cap.
![Image](http://s25.postimg.org/nqlamgi27/image.jpg)
I also purchased Peter's 3D printed air vent and aileron adjusters.
Darick Gundy
Sonex #1646
N417DG
Taildragger, Aerovee, center stick, Prince P-Tip Prop
MGL E1, F2, V6 radio, Sandia Xponder, Reserve lift indicator (AOA), iFly 520
First flight! 10/21/2017