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Viking Fuel Vent Line

I am wanting some insight on how we might be able to create a vent line.  We are currently building a 750 with the 130 and mini header tank.  The video we have is the older one where there is a return line T-off from the pum back into the inlet line.  We already have our wings built and they are the older version without a vent attachment in the top. I noticed that a guy named Roger was in the same situation and he ran what looked like drain valves that came out under the plane behind cockpit.  We would maybe like to go that route but do not know exactly how he did that.  That is really the only problem we are stumped on is getting a vent line from the mini header tank back either to the wing or make some sort of air bleed system as the vent return.  Anyone have any insight or help?

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Replies

  • Not sure how your wing tanks are plumbed to the mini header tank, but it may just vent through the wing tanks fine without the need for separate vent lines.
  • One way this can be done is by simply drilling a hole in the fuel filler neck of the tank, inserting a thin tube and using Proseal to seal the whole works. Or, as Loren is suggesting, venting the top of the mini tank to each of the feed lines usually give OK results but tanks might not drain as evenly. It is very likely that the air does escape from the small header tank this way.
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