ct9000 Posted August 25, 2021 Report Share Posted August 25, 2021 Can anyone suggest where to get the vertical fuel cap vents normally found on SW fuel caps ? Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted August 25, 2021 Report Share Posted August 25, 2021 Flight Design is the only source I know...Roger, Corey, or Tom might know another supplier. Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted August 25, 2021 Report Share Posted August 25, 2021 I made my own from some tubing from Ace Aviation when I was doing testing on the uneven fuel flow from the tanks and mine never slosh fuel out the top. It's cheap and easy. Give me a call. Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted August 25, 2021 Report Share Posted August 25, 2021 I have thought about redesigning those vents to reduce the amount of fuel they puke onto the tops of the wings,and maybe to look better. Fuel sloshes in the tank and makes its way up around the nut and streaks back on the wings. Also if the airplane sits cocked off-level for any period with near full tanks the down wing tank will fill to the brim and literally pour out around the nut...probably a half cup a minute. Recently I put "Seal-All" Fuel sealant around the tube threads and around the 10mm nut that secures it. I have only done a couple of flights, but so far no fuel on the tops of the wings. Seal-All is fuel-proof, clear, and non-structural, so you can unscrew everything and remove or reapply it later. I'll let ya'll know if that makes for a good long term solution. I wish FD had put an o-ring between the tube and the fuel cap to prevent this issue. Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted August 25, 2021 Report Share Posted August 25, 2021 Just go old school with bent 90 degree facing forward vent tube. All fuel spill and slosh goes away. Quote Link to comment Share on other sites More sharing options...
ct9000 Posted August 25, 2021 Author Report Share Posted August 25, 2021 Roger thanks for your input on this one. I have another aircraft type that uses the metal tube bent forward like you describe but it has once been blocked by a mud wasp and caused me some stress. I like the look of the SW vents and they seem to be immune from contamination from water or wasps etc. When I had an SW I never had fuel slosh out at all and in fact I quite liked the caps. I may have to contact FD on this one. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted August 26, 2021 Report Share Posted August 26, 2021 You might check with Airtime Aviation. They might have some salvaged from a CTSW. Quote Link to comment Share on other sites More sharing options...
ct9000 Posted August 26, 2021 Author Report Share Posted August 26, 2021 Thanks Tom will do Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted August 26, 2021 Report Share Posted August 26, 2021 8 hours ago, Roger Lee said: Just go old school with bent 90 degree facing forward vent tube. All fuel spill and slosh goes away. I considered that. You'd still have to seal between the cap and the tube. And I guess you'd have to get the length right. An open 90° tube would probably provide more pressure in flight into the tank than the stock setup...I think that would be okay, but not sure 100% how that would affect the fuel system. Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted August 26, 2021 Report Share Posted August 26, 2021 I had those 90 degree vents for 1500 hours and flew in all types of weather. Never once was there an issue of any type. Plus the taller forward facing tube kept all fuel in the tank even when full. These came from old school ideas and worked on millions of planes for a century. It worked for me better than the stock ones. Quote Link to comment Share on other sites More sharing options...
Anticept Posted August 27, 2021 Report Share Posted August 27, 2021 The only really big catch is try to make sure both tubes are exactly the same. If one is angled differently, you'll get asymmetric pressurization. Yeah the fuel tank balance tube will negate most of it, but that assumes it's functioning correctly (mine always gets fuel in it and becomes useless). Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted August 27, 2021 Report Share Posted August 27, 2021 21 minutes ago, Anticept said: The only really big catch is try to make sure both tubes are exactly the same. If one is angled differently, you'll get asymmetric pressurization. Yeah the fuel tank balance tube will negate most of it, but that assumes it's functioning correctly (mine always gets fuel in it and becomes useless). The balance tube is only for the LS, the SW doesn't have one. Quote Link to comment Share on other sites More sharing options...
Anticept Posted August 27, 2021 Report Share Posted August 27, 2021 Even more critical then Quote Link to comment Share on other sites More sharing options...
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