Hi, John! ZS-WEC is built differently. There are 3 tanks (1 header, 2 wing tanks), but only the header has got a cap. You fill the wing tanks through the header, and empty them to the header, via a pump. The wing tanks are interconnected, and there is a valve between them and the header tank.
Now, the header tank has a vent through its cap; but the two wing tanks are vented to the main tank. Unless everything is full in the system, nothing nasty can happen, because if the main tank is too full, it will overflow to the wing tanks through their vents. Does that give you any ideas? Serge -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Martindale Family Sent: Thursday, March 04, 2004 11:46 To: KRnet Subject: Re: KR>fuel vent Serge Do you have a problem with fuel expanding out through the holes when it gets hot or does it run out if two wing tanks are interconnected and parked on a slope. I have just modified my EH Holden fuel caps on my wing tanks to a similiar arrangement to give an inch or so more "head" over my internal vents (now blocked off) that drained to below the wing. The latter were continually overflowing in the above circumstances but the extra 'head" has reduced this markedly. I could reduce it still more by brazing in a small tube still higher on top of the caps but it starts to look a bit like a coat hangar. I like the RV solution where the vent tubes run up the inside of the firewall (say for 18") then U-turn down again to drain via an opening below the fuselage facing the wind. You can just about stand the RV on its wing tip before the vents leak (well maybe I exaggerate a little but...). Have to watch out for exhaust gases/sparks near the vents I imagine but I'm sure Dana could discuss this further for us. I mention this option because you need to design it in early in tank construction. To retrofit is a big and difficult job for my tanks due lack of easy access thus my cheap interim solution above. John The Martindale Family 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA phone: 61 2 66584767 email: johnj...@chc.net.au ----- Original Message ----- From: "Serge F. Vidal" <serge.vi...@ate-international.com> To: "'KRnet'" <kr...@mylist.net> Sent: Wednesday, March 03, 2004 6:28 PM Subject: RE: KR>fuel vent > My KR2 only has a nifty aluminum fuel cap, which is formed of two parts: a > round cap, and a streamlined aluminium rod acting as a grip. There is a tiny > hole on the rod (2mm) facing back, and linked to another, vertical hole in > the cap itself. And that's it. Has been working for almost 400 hours like > that. > > Serge Vidal > KR2 ZS-WEC > Tunis, Tunisia > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
