---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 01/17/20: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:41 AM - Re: Fuel Pump Vent/Drain Line Routing (Paul M 383) 2. 03:20 AM - Re: Re: Fuel Pump Vent/Drain Line Routing (Peter Zutrauen) 3. 09:16 AM - Rotax 914, how hard does it suck? (rparigoris) 4. 09:20 AM - Rotax 914 UMA Differential Pressure Transducer Failure? (rparigoris) 5. 10:37 AM - Re: Monowheel Brake Calliper Piston (Franzgo) 6. 12:49 PM - Re: Re: Monowheel Brake Calliper Piston (Pete) 7. 03:11 PM - Re: Re: Monowheel Brake Calliper Piston (davidjoyce@doctors.org.uk) 8. 04:29 PM - Re: Re: Monowheel Brake Calliper Piston (Fred Klein) 9. 04:38 PM - Re: Monowheel Brake Calliper Piston (Franzgo) ________________________________ Message 1 _____________________________________ Time: 02:41:53 AM PST US Subject: Europa-List: Re: Fuel Pump Vent/Drain Line Routing From: "Paul M 383" Thanks Pete and Alan, I was hoping to avoid using solid pipes by finding a cool (!) route, but if I have to... Pete, watch out for any negative (or positive) pressure at your exit hole - the Rotax Owner video cautions against this very thing: https://youtu.be/0QYJ3mxziT4?t=859 or https://www.rotax-owner.com/en/videos-topmenu/free-videos/424-fuelpump "We do not want to run this line overboard into the slipstream, or into a positive or negative pressure area..." Best, Paul Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494316#494316 ________________________________ Message 2 _____________________________________ Time: 03:20:12 AM PST US From: Peter Zutrauen Subject: Re: Europa-List: Re: Fuel Pump Vent/Drain Line Routing Thx Paul for the caution. So far I have not seen any impact to fuel pressure. I may install a small shield to reduce the pitot pressure. I fail to see though how pitot pressure could over-ride the fuel pump return spring... just seems to be a bit overblown? If I do see negative impacts, I will glass in a small tube along the inside of the cowl well away from the exhaust. On Fri, Jan 17, 2020 at 5:48 AM Paul M 383 wrote: > > Thanks Pete and Alan, > > I was hoping to avoid using solid pipes by finding a cool (!) route, but > if I have to... > > Pete, watch out for any negative (or positive) pressure at your exit hole > - the Rotax Owner video cautions against this very thing: > > https://youtu.be/0QYJ3mxziT4?t=859 or > https://www.rotax-owner.com/en/videos-topmenu/free-videos/424-fuelpump > > "We do not want to run this line overboard into the slipstream, or into a > positive or negative pressure area..." > > Best, > > Paul > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=494316#494316 > > ________________________________ Message 3 _____________________________________ Time: 09:16:08 AM PST US Subject: Europa-List: Rotax 914, how hard does it suck? From: "rparigoris" Hi Group Curious, has anyone performed a full power run-up checking the oil pump intake vacuum? What were your results? What diameter oil line did you use? Did you have a Oil Thermostat? Thx. Ron P. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494323#494323 ________________________________ Message 4 _____________________________________ Time: 09:20:38 AM PST US Subject: Europa-List: Rotax 914 UMA Differential Pressure Transducer Failure? From: "rparigoris" Hi Group Curious, has anyone had a 914 UMA Differential Pressure Transducer Failure? If so at how many hours? Did you have Transducer exposed to internal cowl temperatures or have it situated in a container under cowl with ambient airflow or perhaps located aft of Firewall? How was failure noticed? Thx. Ron P. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494324#494324 ________________________________ Message 5 _____________________________________ Time: 10:37:31 AM PST US Subject: Europa-List: Re: Monowheel Brake Calliper Piston From: "Franzgo" Well, maybe I was not clear, Europa no longer provides any of the old braking system and original wheel/disk for the monowheel, as they chose to replace it with the Beringer system which includes a new rim beside a completely reformed brake. Patrick, I am a bit reluctant to the Beringer system becauses the main tyre no longer uses airtube and, in consequence requires a far higher pressure (around 2 bar) than the previous recommended pressure (1,3 bar). For grass strips, a higher pressure is not really an issue, but for hard landing surfaces with the monowheel I really fear that it is not adapted (Bouncing and bouncing again...) For the moment I have chosen to keep the old system with an intermediate tyre pressure (1.5 bar) which seeems to be a good compromise. Peter, yes the piston may be machined quite easely as far as you have one in hand. And maybe it would be profitable to use 2017 alloy with anodization finish to keep it away from rust. On my aircraft I have found interesting to use Silicon Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to chase moisture from the brake pipe and also to protect all gaskets from wearing to fast. For one year now I find that the caliper has less tendancy to grip than with the old sticky (and hygroscopic) brake liquid... -------- Franzgo Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494326#494326 ________________________________ Message 6 _____________________________________ Time: 12:49:14 PM PST US From: Pete Subject: Re: Europa-List: Re: Monowheel Brake Calliper Piston Thx Franzgo, The anodizing is a good idea. I am currently using Dot5 as well in my classic mono. Expensive, but i like it as it is so benign. I wonder if beringer can use it (they spec dot4). I talked with beringer at osh, as well as emailing them, and in those interactions they claimed 18-20psi is fine. Did you find a the minimum pressure documented somewhere? Thx, Pete > On Jan 17, 2020, at 1:36 PM, Franzgo wrote: > > > Well, maybe I was not clear, Europa no longer provides any of the old braking system and original wheel/disk for the monowheel, as they chose to replace it with the Beringer system which includes a new rim beside a completely reformed brake. > > Patrick, I am a bit reluctant to the Beringer system becauses the main tyre no longer uses airtube and, in consequence requires a far higher pressure (around 2 bar) than the previous recommended pressure (1,3 bar). For grass strips, a higher pressure is not really an issue, but for hard landing surfaces with the monowheel I really fear that it is not adapted (Bouncing and bouncing again...) > > For the moment I have chosen to keep the old system with an intermediate tyre pressure (1.5 bar) which seeems to be a good compromise. > > Peter, yes the piston may be machined quite easely as far as you have one in hand. And maybe it would be profitable to use 2017 alloy with anodization finish to keep it away from rust. On my aircraft I have found interesting to use Silicon Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to chase moisture from the brake pipe and also to protect all gaskets from wearing to fast. For one year now I find that the caliper has less tendancy to grip than with the old sticky (and hygroscopic) brake liquid... > > -------- > Franzgo > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=494326#494326 > > > > > > > > > ________________________________ Message 7 _____________________________________ Time: 03:11:14 PM PST US From: davidjoyce@doctors.org.uk Subject: Re: Europa-List: Re: Monowheel Brake Calliper Piston Franzgo, I chose to change my original mono wheel and brake system to a Beringer one, largely to save some weight. I use the same pressure as in the original and have had no problems with it. The braking is superior.. There are of course quite a few mono wheels lying around from folk who have changed to trigear formation and you may well be able to locate one if you really want to stick with the original. Regards, David Joyce, GXSDJ On 2020-01-17 18:36, Franzgo wrote: > > Well, maybe I was not clear, Europa no longer provides any of the old braking system and original wheel/disk for the monowheel, as they chose to replace it with the Beringer system which includes a new rim beside a completely reformed brake. > > Patrick, I am a bit reluctant to the Beringer system becauses the main tyre no longer uses airtube and, in consequence requires a far higher pressure (around 2 bar) than the previous recommended pressure (1,3 bar). For grass strips, a higher pressure is not really an issue, but for hard landing surfaces with the monowheel I really fear that it is not adapted (Bouncing and bouncing again...) > > For the moment I have chosen to keep the old system with an intermediate tyre pressure (1.5 bar) which seeems to be a good compromise. > > Peter, yes the piston may be machined quite easely as far as you have one in hand. And maybe it would be profitable to use 2017 alloy with anodization finish to keep it away from rust. On my aircraft I have found interesting to use Silicon Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to chase moisture from the brake pipe and also to protect all gaskets from wearing to fast. For one year now I find that the caliper has less tendancy to grip than with the old sticky (and hygroscopic) brake liquid... > > -------- > Franzgo > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=494326#494326 [1] > Links: ------ [1] http://forums.matronics.com/viewtopic.php?p=494326#494326 [2] http://www.matronics.com/contribution [3] http://www.matronics.com/Navigator?Europa-List [4] http://forums.matronics.com [5] http://wiki.matronics.com ________________________________ Message 8 _____________________________________ Time: 04:29:25 PM PST US From: Fred Klein Subject: Re: Europa-List: Re: Monowheel Brake Calliper Piston With my Beringer I particularly like having mounted it low on the pilot =99s control column which allows left hand breaking with right hand on throt tle Sent from my iPhone > On Jan 17, 2020, at 3:13 PM, davidjoyce@doctors.org.uk wrote: > > =EF=BB > Franzgo, I chose to change my original mono wheel and brake system to a Be ringer one, largely to save some weight. I use the same pressure as in the o riginal and have had no problems with it. The braking is superior.. > > There are of course quite a few mono wheels lying around from folk who hav e changed to trigear formation and you may well be able to locate one if you really want to stick with the original. Regards, David Joyce, GXSDJ > > > > >> On 2020-01-17 18:36, Franzgo wrote: >> >> >> Well, maybe I was not clear, Europa no longer provides any of the old bra king system and original wheel/disk for the monowheel, as they chose to repl ace it with the Beringer system which includes a new rim beside a completel y reformed brake. >> >> Patrick, I am a bit reluctant to the Beringer system becauses the main ty re no longer uses airtube and, in consequence requires a far higher pressure (around 2 bar) than the previous recommended pressure (1,3 bar). For grass s trips, a higher pressure is not really an issue, but for hard landing surfac es with the monowheel I really fear that it is not adapted (Bouncing and bou ncing again...) >> >> For the moment I have chosen to keep the old system with an intermediate t yre pressure (1.5 bar) which seeems to be a good compromise. >> >> Peter, yes the piston may be machined quite easely as far as you have one in hand. And maybe it would be profitable to use 2017 alloy with anodizatio n finish to keep it away from rust. On my aircraft I have found interesting t o use Silicon Oil (brand AUTOMEC, Dot 5.0) instead of classic brake oils, in order to chase moisture from the brake pipe and also to protect all gaskets from wearing to fast. For one year now I find that the caliper has less te ndancy to grip than with the old sticky (and hygroscopic) brake liquid... >> >> -------- >> Franzgo >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=494326#494326 >> >> >> >> >> >> >> .matronics.com/contribution >> ttp://www.matronics.com/Navigator?Europa-List >> ics.com >> .com >> .matronics.com/contribution >> >> >> ________________________________ Message 9 _____________________________________ Time: 04:38:11 PM PST US Subject: Europa-List: Re: Monowheel Brake Calliper Piston From: "Franzgo" Hi All, When visiting the Beringer facility in 2018 I was told that a higher pressure was necessary with the tubeless system in order to keep the tyre firmly inserted in the rim. That's why I was not confident with this new wheel. And another problem is the deflation quite accelerated (vs tube-type tyre), in case of perforation, no ? Last question, maybe someone has kept the original master cylinder hand-controled with the Beringer wheel ? I would prefer to keep it, personnaly I don't really like the brake command on the control stiick. On the other hand, the Beringer system is truly quite lighter, yes, but yet VERY EXPENSIVE (More than 1200 euros) I think. To finish about Silicon Oil (5.0, as 5.1 is not silicon), it is certain that it can be used with the Beringer system, because it complies with ANY GASKETS, is not flammabe, non toxic, non hygroscopic and whatsoever... Moreover, no more fastidious purges, this oil is a lifetime product ! Franois MonoW 914 Classic S/N 36 Vienne, France -------- Franzgo Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494330#494330 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.