---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Tue 01/20/09: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:35 AM - Mixture control (Remi Guerner) 2. 02:54 AM - Mixture control (Remi Guerner) 3. 06:15 AM - Re: Cooling problems (Karl Heindl) 4. 06:16 AM - Re: A question on composits (h&jeuropa) 5. 09:18 AM - Re: Mixture control (Terry Seaver (terrys)) 6. 11:42 AM - Re: mono-bungees (Trombley) 7. 11:58 AM - Re: mono-bungees (Fred Klein) 8. 01:50 PM - Re: A question on composits (karelvranken) 9. 01:59 PM - Re: Garmin GTX 328. (Mike Parkin) 10. 07:05 PM - Re: Seat Belt Restraint Points (JR Gowing) ________________________________ Message 1 _____________________________________ Time: 02:35:31 AM PST US From: "Remi Guerner" Subject: Europa-List: Mixture control Graham, I agree that the inlet configuration is important. As I am using the Rotax 912 series optional airbox, this may be the cause of the different mixture distribution compared to the same engine type fitted with the Europa airbox. Remi the inlet to the carbs can have a marked effect. Some friends were struggling with a Jab6 installation, single Bing carb, the rear cylinders were overheating. After many fruitless efforts with cooling baffles over a frustrating year, the cure was to replace the nice smooth elbow at the inlet with a square box. Courtesy of Tony Higgins experience. Graham ________________________________ Message 2 _____________________________________ Time: 02:54:55 AM PST US From: "Remi Guerner" Subject: Europa-List: Mixture control Hi Ron, Better too rich than too lean, I agree. Remi >>>>>>>>If your forward cylinders run a little rich at lower RPMs, so be it, but at take off power your real interest is you are not running lean at all. Best taint slight towards richer at full power<<<<<<<<< ________________________________ Message 3 _____________________________________ Time: 06:15:18 AM PST US From: Karl Heindl Subject: RE: Europa-List: Cooling problems Hi Paul=2C Have you ever considered a mod which allows you to vary the cooling ? I am working on one whereby the main inlet is a large scoop further back=2C whic h I can vary from a small slit to wide open. I removed the original fishmouth completely by making an initial cutout of appr. 12 inches wide by 14 inches long. I am talking about the XS cowl. I w ill rebuild the opening with a piece of shaped aluminum bonded to the insid e and glassed over on the outside. I think it is a very straightforward mod =2C also using a push/pull control from ACS or the car parts shop=2C one th at can be locked in any position. It should meet my cooling requirements=2C at the same time reducing drag in the cruise. Karl > Date: Mon=2C 19 Jan 2009 20:36:32 -0600> Subject: Re: Europa-List: A ques tion on composits> From: paul.the.aviator@gmail.com> To: europa-list@matron ator@gmail.com>> > Hi Karel=2C> > I was wondering now that you have put a l ittle more time on your> airplane are you still happy with your modificatio n? Also=2C I am> curious about a few other things.> > - Did you do this mod ification from the beginning=2C or after you had> been flying for a while. If yes=2C do you have any before / after> comparisons to share.> - How do y ou find this modification works on during a long taxi on a> hot summers day .> - Is the size of the inlet the same or smaller than the original> Europa design. If smaller=2C can you give me your new square area ?> - It looks l ike your new inlet does not project as far forward as the> original Europa design=2C can you give me some measurements.> - Did you make your modificat ion using Epoxy or vinyl-ester resin ?> - Is there any particular reason th at you did not make large radius's> on the edges of the inlet.> > I have tw o problems to solve=2C mine over heats if I have a long taxi> (CHT)=2C or i f Tower has me standing at the hold short line too long.> The other issue i s that the aircraft (914) is capable to climb at more> that 1000 feet per m inute all the way to 10=2C000 ~ 12=2C000'=2C however the> oil overheats if I do more that 500' per minute.> > If you have any more photos other that t he 3 you shared on the forum=2C> I'd appreciate it if you could send them o n.> > Thanks for indulging my long list of questions.> > Regards=2C Paul> > > On Thu=2C Jul 3=2C 2008 at 3:28 PM=2C karelvranken wrote:> > Jeff=2C> > In attachment my concept of cowling and inner ra =====> > > ________________________________ Message 4 _____________________________________ Time: 06:16:23 AM PST US Subject: Europa-List: Re: A question on composits From: "h&jeuropa" Paul, There are several threads on this forum about cowl mods. The two most comprehensive are: Nov 30, 2006, Cooling Diffuser Dec 01, 2006, Perfect Cooling Diffuser More photos of Karel's cowl there. Jim Butcher Read this topic online here: http://forums.matronics.com/viewtopic.php?p=225836#225836 ________________________________ Message 5 _____________________________________ Time: 09:18:01 AM PST US Subject: RE: Europa-List: Mixture control From: "Terry Seaver (terrys)" Hi Remi, It is quite possible that I got the front and rear mixtures mixed up. I will check my notes when I get home tonight to see if this is the case. The point I was trying to make was that; 1) the intake manifold does not feed all cylinders symmetrically, causing some to be leaner than others, 2) The evidence suggests that on our 912S, the lean cylinders start out lean of peak at see level. We believe this lean of peak is acceptable because the heads are liquid cooled. regards, Terry ________________________________ From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Remi Guerner Sent: Monday, January 19, 2009 12:50 PM Subject: Europa-List: Mixture control Terry, I am coming back to this subject as I am doing some maintenance on the engine and had to remove the exhaust system. I took this opportunity to look at the coloration inside the exhaust elbows. Here is what I found: Cyl 1: black Cyl 4: white Cyl 2 and 3: light brown So cyl 4 is the leanest on my engine. Cyl 1 is the richest and the other 2 are in between. My engine has 350 hours and no adjustment of the carb needles were done since new. I could adjust the right carb needle to run leaner on Cyl 1 and 3, but the two front cylinders (1 and 2) would still run richer than the rear ones. This is different from what you experienced with your own engine. Mixture maldistribution is obvious here and does not seem to be repeatable on all engines of the type (912 ULS). Regards Remi Guerner F-PGKL >>>>>>>Testing has shown that the standard rotax carb settings are actually lean-of-peak at sea level on the front two cylinders <<<<<<<< Terry Seaver ________________________________ Message 6 _____________________________________ Time: 11:42:46 AM PST US Subject: Re: Europa-List: mono-bungees From: "Trombley" Fred, Where and when shall we meet to take you up on your offer of a beverage. While it is certainly easier to replace the bungee with the engine off I was not willing to go to that length. Instead the bungee can be removed/replaced by simply supporting the plane by what ever means you find sutaible and removing the wheel from the LG frame. Also, I remember detaching the damping block and shock from the swing arm and fixing it up and out of the way with some wire. Obviously the removal of the old bungee is a no brainer. The installation of a new bungel is a little trickier. Going from memory...I wrapped packing tape over the last several inches of the new bungee and extended a tail about 12" or so. The tail was feed up and over the top of the LG frame and pulled from under the lower LG frame. The process was repeated until the entire length was installed. The firewall aids in this regard forcing the tail over the top. I also remember using a broom stick as an axel and so me gym weights (to simulate the weight of the wheel) to adjust the final tension of the bungee. Hope the above make sense. Kind regards, Erich Trombley N28ET Classic Mono 914 Visit - www.EuropaOwners.org ________________________________ Message 7 _____________________________________ Time: 11:58:21 AM PST US From: Fred Klein Subject: Re: Europa-List: mono-bungees On Jan 20, 2009, at 11:40 AM, Trombley wrote: > Where and when shall we meet to take you up on your offer of a > beverage. Eric, Well....that just takes the cake!...How about SnF 2009? Your description is a keeper and will go into my special archive, Thanks, Fred -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 8 _____________________________________ Time: 01:50:34 PM PST US From: "karelvranken" Subject: Re: Europa-List: A question on composits Paul, You don't know perhaps that I was so lucky to find an Europa builder in my village at ten minutes walking, without knowing him before I came back from Kirbymoorside with the first Kit stage. Second convenience was that we choose the same configuration. Mono XS, Rotax 912 ULS, Airmaster CS etc... My friend was already one year building and afterwards he said he was making the rough copy for me. So I was witness of the cooling problems he had before I was that far and so I made several decisions from the beginning. If you are aware of the fact that under the cowling airflow is submitted to the same aerodynamic flow rules as anywhere than you may consider the cowling design as very poor. First came the fish mouth opening. By bringing the entrance farther from the center of the propeller you can benefit of a greather prop wash. Second object were the radiators. The cubic block radiator for the coolant even with the gap underneath filled up wasn't a technical tour de force. I used a radiator with the same contents but half as thick to fill up the disponible section. The oil radiator stayed on its original place but received a thermostatic valve. The exhaust system was keracoated in order to exchange less heath under the cowling. Finally after studying the shape of the air entrance (courtesy to Gilles Thesee and others) I decided to make a kind of pitot tube profile where the smallest section was half the area of the radiator surface. Only outside air is passing trough the radiators. Once you have sufficient air entering all the openings in the cowling, you also must work on the excit. Here Terry Seaver learnt me a lot to guide the air out and by trial and error I made the final shape after measuring temperatures on different places under the cowling. Therefor I used the epoxy and cloth that I had reinforced by a layer of carbon/kevlar. No particular reason for the radiuses; let's call it personal styling. The results are as follows: Normal temperatures for coolant (Evans) 110C at sea level and 95 for oil. Note that the oil is not cooled only by the radiator but also by the crankcase and the reservoir, this latter placed behind the naca scoop. In hot summer 40C the temperatures will raise up to 120C for the coolant and 105C for the oil while taxiing and in TO on full power and climbing. Even though this is temporarily until reaching cruise level. If at greater altitudes the coolant will slow down a bit, the oil stays on 90C due to the thermostatic action. Now it is difficult to say: copy my installation and you will have the same results. With the 914 you have a different configuration and therefore I have no experience. I wish you good experimental building, Karel Vranken #447 F-PKRL 203 hours. PS I am revalidating from a surgical intervention at the right shoulder. At a better moment I will send you some more pic's. ----- Original Message ----- From: "Paul McAllister" Sent: Tuesday, January 20, 2009 3:36 AM Subject: Re: Europa-List: A question on composits > > > Hi Karel, > > I was wondering now that you have put a little more time on your > airplane are you still happy with your modification? Also, I am > curious about a few other things. > > - Did you do this modification from the beginning, or after you had > been flying for a while. If yes, do you have any before / after > comparisons to share. > - How do you find this modification works on during a long taxi on a > hot summers day. > - Is the size of the inlet the same or smaller than the original > Europa design. If smaller, can you give me your new square area ? > - It looks like your new inlet does not project as far forward as the > original Europa design, can you give me some measurements. > - Did you make your modification using Epoxy or vinyl-ester resin ? > - Is there any particular reason that you did not make large radius's > on the edges of the inlet. > > I have two problems to solve, mine over heats if I have a long taxi > (CHT), or if Tower has me standing at the hold short line too long. > The other issue is that the aircraft (914) is capable to climb at more > that 1000 feet per minute all the way to 10,000 ~ 12,000', however the > oil overheats if I do more that 500' per minute. > > If you have any more photos other that the 3 you shared on the forum, > I'd appreciate it if you could send them on. > > Thanks for indulging my long list of questions. > > Regards, Paul > > > On Thu, Jul 3, 2008 at 3:28 PM, karelvranken > wrote: >> Jeff, >> In attachment my concept of cowling and inner radiator duct. >> Best regards, >> Karel Vranken > > > ________________________________ Message 9 _____________________________________ Time: 01:59:12 PM PST US From: "Mike Parkin" Subject: RE: Europa-List: Garmin GTX 328. Thanks David. Regards, Mike -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of David Joyce Sent: 17 January 2009 17:54 Subject: Re: Europa-List: Garmin GTX 328. Mike, My LAA Radio Installation Approval certificate for my GTX328 states under Approval Number EASA .I.M.210.809 Regards, David Joyce, G-XSDJ ----- Original Message ----- From: "Mike Parkin" Sent: Friday, January 16, 2009 8:51 PM Subject: Europa-List: Garmin GTX 328. > Does anyone have the CAA/EASA approval details for the Garmin GTX 328. > > > Regards, > > > Mike > > > ________________________________ Message 10 ____________________________________ Time: 07:05:40 PM PST US From: "JR Gowing" Subject: Re: Europa-List: Seat Belt Restraint Points Fred Don't bother trying to get up more pictures - I can see from the ones you already sent that I ought to do the mod. What I need now is the plan/details - and if anyone has already made parts to spare. JR (Bob) Gowing UK Kit 327 in oz ----- Original Message ----- From: Fred Klein To: europa-list@matronics.com Sent: Tuesday, January 20, 2009 4:16 PM Subject: Re: Europa-List: Seat Belt Restraint Points On Jan 19, 2009, at 7:30 PM, JR Gowing wrote: It folding headrest arrangement now looks a hundred times better than I thought when I first saw it! Especially since you mentioned how it increas the size of the sitting area when it is folded. I understood that you are sending more info by some means so will be patient. But if not then please tell me. Bob, I thought you were joshing me about the increase in size of sitting area...believe me, that was an unanticipated plus...the critical thing (at least to me at the time) was to not have to sit on a knife-edge! Let me see if I can scan a drawing into a form which I can send to you, along w/ some add'l pixs....say, tomorrow, or the day after! Cheers, Fred -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ------------------------------------------------------------------------- ----- Checked by AVG - http://www.avg.com 1/19/2009 8:52 PM ------------------------------------------------------------------------------------- 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.