---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Thu 09/14/17: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:48 AM - Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE (willydewey) 2. 10:01 AM - Re: Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE (davidjoyce@doctors.org.uk) 3. 11:40 AM - Re: Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE (Brian Davies) ________________________________ Message 1 _____________________________________ Time: 08:48:32 AM PST US Subject: Europa-List: Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE From: "willydewey" Thanks Guys for your inputs regarding ventilation. Food for thought indeed. i will mull over your replies but I favour(favor) high level vents placed well up from the exhaust outlet. Not sure which ones yet. Pete Jeffers has suggested that fumes may be getting in through the vent pipe that was put in from the baggage wall to somewhere near the tail Another invesigation I Guess. Thanks all for your help and interest Bill Dewey -------- Give a wise man knowledge and he will be yet wiser Read this topic online here: http://forums.matronics.com/viewtopic.php?p=472874#472874 ________________________________ Message 2 _____________________________________ Time: 10:01:48 AM PST US From: davidjoyce@doctors.org.uk Subject: Re: Europa-List: Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE Bill, Have you thought of getting yourself a domestic carbon monoxide monitor which comes with a readout of CO concentration + indication of how serious/lethal that concentration is. Sell for around 30 in UK. After being exposed to near lethal levels when a plane I was test flying shed its exhaust stub, I feel every plane should have one! But it also let memove it around in my plane and find put where the fumes were coming from which for me was from the slots in the exhaust stub where it is clamped onto the silencer - fixed with fire cement. Regards, David Joyce, GXSDJ On 2017-09-14 16:48, willydewey wrote: > > Thanks Guys for your inputs regarding ventilation. Food for thought indeed. > i will mull over your replies but I favour(favor) high level vents placed well up from the exhaust outlet. Not sure which ones yet. > Pete Jeffers has suggested that fumes may be getting in through the vent pipe that was put in from the baggage wall to somewhere near the tail Another invesigation I Guess. > Thanks all for your help and interest > Bill Dewey > > -------- > Give a wise man knowledge and he will be yet wiser > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=472874#472874 [1] > Links: ------ [1] http://forums.matronics.com/viewtopic.php?p=472874#472874 [2] http://www.matronics.com/Navigator?Europa-List [3] http://forums.matronics.com [4] http://wiki.matronics.com [5] http://www.matronics.com/contribution ________________________________ Message 3 _____________________________________ Time: 11:40:18 AM PST US From: "Brian Davies" Subject: RE: Europa-List: Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE I had a CO problem about a year ago and carried out some investigation. The big clue, found by using a CO meter, was that the CO doubled when the flaps were down. I talked to Andy Draper who said the exhaust gases could enter via the flap slots and travel forwards through the tunnel and into the cockpit via the various control slots. I resisted cleaning my aircraft for a period and traced exhaust stains along the fuselage that travelled to the (Trigear) leg/fuse join and up to the flap slot. There were no stains aft of the flap slots. I considered putting a leather boot around the pitch tube to seal off the tunnel and also designing various devices to close off or deflect air away from the flap slots but eventually gave up and the CO has mysteriously dropped. In Bill=99s case it could be that the modification he has that extracts air from the cockpit via a tube running from the baggage bay bulkhead to the rudder sternpost might be increasing the negative pressure in the cockpit and sucking in more CO. This theory could be tested by disconnecting the tube, blocking up the hole in the rear bulkhead and allowing the extraction tube to collect air from around the flap slots and dump it overboard via the rudder sternpost hole. Worth a try Bill? Regards Brian From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of davidjoyce@doctors.org.uk Sent: 14 September 2017 18:00 Subject: Re: Europa-List: Re: VENTILATION IN FLIGHT & POSITIVE CABIN PRESSURE Bill, Have you thought of getting yourself a domestic carbon monoxide monitor which comes with a readout of CO concentration + indication of how serious/lethal that concentration is. Sell for around =C2=A330 in UK. After being exposed to near lethal levels when a plane I was test flying shed its exhaust stub, I feel every plane should have one! But it also let memove it around in my plane and find put where the fumes were coming from which for me was from the slots in the exhaust stub where it is clamped onto the silencer - fixed with fire cement. Regards, David Joyce, GXSDJ On 2017-09-14 16:48, willydewey wrote: Thanks Guys for your inputs regarding ventilation. Food for thought indeed. i will mull over your replies but I favour(favor) high level vents placed well up from the exhaust outlet. Not sure which ones yet. Pete Jeffers has suggested that fumes may be getting in through the vent pipe that was put in from the baggage wall to somewhere near the tail Another invesigation I Guess. Thanks all for your help and interest Bill Dewey -------- Give a wise man knowledge and he will be yet wiser Read this topic online here: http://forums.matronics.com/viewtopic.php?p=472874#472874 ttp://www.matronics.com/Navigator?Europa-List ics.com .com .matronics.com/contribution Image removed by sender. 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