[HansLab]

The new air vents on top of the tank are open with air (duh).

Isn't there a chance that due to communicating vessels (if that is the mot juste) this air vent might siphon in case of very high nose-angles? For example in high-turns or after stalls? When the tank is full (including the filler pipe) there just isn't much needed to siphon - and from that moment on it will keep syphoning, until lower nose angles.

PS I know that high-turns are not allowed - but you get my point.

 

[Rick_A]

There is a siphon break in the design

There is a small air vent line installed in the fuel vent line. If you have the plans, you can see the secondary line installation.

When I installed air vent line in the fuel vent line, I assumed it was there to act as a siphon-break.

 

[rvbuilder2002]

There is a small air vent line installed in the fuel vent line. If you have the plans, you can see the secondary line installation.

When I installed air vent line in the fuel vent line, I assumed it was there to act as a siphon-break.

That is exactly what it is for.