---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 04/22/07: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:24 AM - Re: Fuel Venting (Robert de Vries) 2. 06:50 AM - Re: Fuel Venting (Etienne Verhellen) 3. 07:05 AM - Re: No Title (Scooter) ________________________________ Message 1 _____________________________________ Time: 04:24:11 AM PST US From: Robert de Vries Subject: Re: Yak-List: Fuel Venting Hi Don, Dennis, rest, Maybe this helps: We have our '86 RedYak 52 since 1996 and off course the same fuel venting problem; especially in direct sun heat with full capped tanks some 5-10 liters will syphon/vent. Preferably with someone smoking a fag next to the Yak in an airshow static display...... So I 'engeneered' a very simple and cheap 'solution', after trying some other tricks that did not work: -take tank cap s home and drill an, e.g. M4 or M5 hole in it, then cut thread in it to fit M4 or M5 screw, I used surplus belly screws. -Take your Dremel tool and slice a partial lenghtwise (so perpendicular to thread) slit in screws. -unscrew partly when not flying, air and exess fuel will escape through small cut in screw. -when checking tanks before flight fasten screw, when forgotten: fool proof; only very small amount of fuel will escape during inverted flight or because of underpressure over wing. After this mod our problem was solved; only little venting from cap due overpressure; no more ( EURO 2,3/lit!!!!!) 5-10 lit's syphononing via center vent under belly. Total cost: NIL Time: 2 hours try it; if it does not work: leave screw tight and no harm done to cap. fly safe: Sad to read about the Blues crash, we had them over here at Leeuwarden airbase in Holland last summer and I had a few brewskies with the hero's....... Robert de Vries Van Struykstraat 2 2203 HE Noordwijk Holland,Europe tel/fax:+31-71-3619730 mobile:+31-6-51792046 rob@redyak.demon.nl www.redyak.tk skype:redyak ________________________________ Message 2 _____________________________________ Time: 06:50:12 AM PST US Subject: Re: Yak-List: Fuel Venting From: "Etienne Verhellen" Good Robert. We 'll try that on our 52. Hope to see you guys in Zoersel for some formation flying. Cheers, Etienne. http://www.aerobatics.org.uk/photos/profile.php?uid=84 _____________________________________________________________________________ Sujet : Re: Yak-List: Fuel Venting Hi Don, Dennis, rest, Maybe this helps: We have our '86 RedYak 52 since 1996 and off course the same fuel venting problem; especially in direct sun heat with full capped tanks some 5-10 liters will syphon/vent. Preferably with someone smoking a fag next to the Yak in an airshow static display...... So I 'engeneered' a very simple and cheap 'solution', after trying some other tricks that did not work: -take tank cap s home and drill an, e.g. M4 or M5 hole in it, then cut thread in it to fit M4 or M5 screw, I used surplus belly screws. -Take your Dremel tool and slice a partial lenghtwise (so perpendicular to thread) slit in screws. -unscrew partly when not flying, air and exess fuel will escape through small cut in screw. -when checking tanks before flight fasten screw, when forgotten: fool proof; only very small amount of fuel will escape during inverted flight or because of underpressure over wing. After this mod our problem was solved; only little venting from cap due overpressure; no more ( EURO 2,3/lit!!!!!) 5-10 lit's syphononing via center vent under belly. Total cost: NIL Time: 2 hours try it; if it does not work: leave screw tight and no harm done to cap. fly safe: Sad to read about the Blues crash, we had them over here at Leeuwarden airbase in Holland last summer and I had a few brewskies with the hero's....... Robert de Vries Van Struykstraat 2 2203 HE Noordwijk Holland,Europe tel/fax:+31-71-3619730 mobile:+31-6-51792046 rob@redyak.demon.nl www.redyak.tk skype:redyak --- Scarlet ADSL Unlimited Seulement 24,95 euro par mois. Vitesse maximale jusqu'a 6 Mbps, 30 GB de volume de telechargement. Commandez maintenant ________________________________ Message 3 _____________________________________ Time: 07:05:11 AM PST US Subject: Yak-List: Re: No Title From: "Scooter" Here's a link with some drawings for a fod cover. http://www.yakuk.com/MPD.htm The intended material is ceconite secured by seam cement. 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