Europa-List Digest Archive

Wed 01/25/17


Total Messages Posted: 5



Today's Message Index:
----------------------
 
     1. 01:25 AM - Re: Rotax 914 Exhaust Leak (davidjoyce@doctors.org.uk)
     2. 05:30 AM - Re: Rotax 914 Exhaust Leak (Remi Guerner)
     3. 06:17 AM - Re: EUROPA XS GAS STRUTS (willydewey)
     4. 06:52 AM - Skysports bendable capacitive probe calibration? (clivesutton)
     5. 10:58 AM - Re: Skysports bendable capacitive probe calibration? (Richard Scanlan)
 
 
 


Message 1


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    Time: 01:25:49 AM PST US
    From: davidjoyce@doctors.org.uk
    Subject: Re: Rotax 914 Exhaust Leak
    Dave, I had a somewhat similar experience having invested in a new electronic CO detector instead of one of those useless cardboard dots. I found my leak was through the slots in the join where the exhaust stub fits onto the silencer. Filling that with exhaust cement totally fixed my problem, although naturally that is not going to help you if your remaining problem is still with the exhaust down pipes, but worth checking anyway. Regards, David Joyce, GXSDJ (914 XS) On 2017-01-25 04:13, djaflyact wrote: > > I have a motor glider with the 914 engine. Just bought a good CO detector and was surprised that I have been flying for years with low level CO in the cockpit. I did the classic shop vac blowing in the exhaust to see if I could determine any leaks. To my huge surprise, I didn't need soapy water to find a leak. All four slip joints are blowing air like crazy. The fit seems very loose. I did the same test on a friend's newer 914 and there was no leak at all. > > Anyone have any experience with this. I loaded up the joint with anti seize compound as a test and the leak was reduced significantly. The cockpit readings at idle lowered from 20 to 5 on the ground. I am considering using a pipe expanding tool to slightly increase the smaller pipe to make it a tight fit. The metal is stainless steel and I don't know if that can be done. It won't take much to provide the increased tightness. > > A big concern is the cost off the exhaust parts if I need to replace them. Rotax is extremely proud of their parts. the 4 pipes and the gatherer total approximately $4700. That is crazy. > > Any isights would be appreciated. > > Dave A > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=465414#465414 [1] > > Attachments: > > http://forums.matronics.com//files/screen_shot_2016_12_29_at_74111_pm_173.png [2] > Links: ------ [1] http://forums.matronics.com/viewtopic.php?p=465414#465414 [2] http://forums.matronics.com//files/screen_shot_2016_12_29_at_74111_pm_173.png [3] http://www.matronics.com/Navigator?Europa-List [4] http://forums.matronics.com [5] http://wiki.matronics.com [6] http://www.matronics.com/contribution


    Message 2


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    Time: 05:30:50 AM PST US
    Subject: Re: Rotax 914 Exhaust Leak
    From: "Remi Guerner" <air.guerner@orange.fr>
    I think it is illusory to try to get a 100% sealed exhaust system. Metal to metal joints are not perfect, especially when they are subjected to thermal expansion and vibrations. They can be improved using some sort of sealant but that will not last for long due to the huge temperatures involved. Leaks are more likely on the 914 due to the higher back pressure caused by the turbo when it is working at full boost with the waste gate fully closed. Leaks are also likely on the 912 with the CKT exhaust when the springs age and become weaker. One solution to prevent fumes to get into the cockpit is to make sure cockpit pressure is always higher than both cowling pressure and outside pressure. To achieve that, the cowling should be well vented with small air intakes and an exit area big enough to suck the airflow. Fresh and/or heated air vents should be at least partially open to create a pressure build-up inside the cockpit. I still have to perform some CO measurements to determine if I was successful at achieving that. Remi Guerner F-PGKL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=465424#465424


    Message 3


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    Time: 06:17:04 AM PST US
    Subject: Re: EUROPA XS GAS STRUTS
    From: "willydewey" <willydewey@gmail.com>
    Hi John thank you for your reply I have tried Karen for the last 10 days now on the phone and left messages but with no response until as a last resort phoned David at Swift Aircraft, that got things sorted. I will use SGS as prompted by your goodself Appreciated your message Bill Dewey G-IANI -------- Give a wise man knowledge and he will be yet wiser Read this topic online here: http://forums.matronics.com/viewtopic.php?p=465426#465426


    Message 4


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    Time: 06:52:28 AM PST US
    Subject: Skysports bendable capacitive probe calibration?
    From: "clivesutton" <clive.maf@googlemail.com>
    I have fitted the above fuel level sensor into the RH lobe of my fuel tank. The probe design is the same type sold by Airworld for many years. The system already has a 'needle-on-scale' type readout via a VDO-type gauge - but i would also like to connect its signal output on an AUX channel of my EIS4000 engine monitor to display actual figures in Litres For that to work, the EIS4000 needs a 'scale factor'. Has anyone done this already - and if so, what SF (and 'offset' value) did you use please? If it has not been done already but you know the approximate voltage outputs from this probe expected at 'empty' and 'full', that data would also be very useful Looking forward to your replies Clive Sutton, UK Kit 121 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=465428#465428


    Message 5


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    Time: 10:58:45 AM PST US
    From: Richard Scanlan <aspenbuild@me.com>
    Subject: Re: Skysports bendable capacitive probe calibration?
    The probes sold by Airworld would not 'talk' to my Dynon and I had to buy genuine ones from an alternative source. Airworld ones look identical but are copies and work in a different way and would only work with their analogue gauges. Rich S. CEIW Sent from my iPad > On 25 Jan 2017, at 14:52, clivesutton <clive.maf@googlemail.com> wrote: > > > I have fitted the above fuel level sensor into the RH lobe of my fuel tank. The probe design is the same type sold by Airworld for many years. > > The system already has a 'needle-on-scale' type readout via a VDO-type gauge - but i would also like to connect its signal output on an AUX channel of my EIS4000 engine monitor to display actual figures in Litres > > For that to work, the EIS4000 needs a 'scale factor'. Has anyone done this already - and if so, what SF (and 'offset' value) did you use please? > > If it has not been done already but you know the approximate voltage outputs from this probe expected at 'empty' and 'full', that data would also be very useful > > Looking forward to your replies > > > Clive Sutton, UK Kit 121 > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=465428#465428 > > > > > > > > >




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