---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Wed 12/24/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:02 AM - Re: A lot to look forward to and be thankful for! (William Daniell) 2. 06:33 AM - Revised Europa Specifications (Remi Guerner) 3. 01:52 PM - Re: Revised Europa Specifications (rampil) 4. 02:23 PM - Re: Revised Europa Specifications (rampil) ________________________________ Message 1 _____________________________________ Time: 06:02:50 AM PST US From: "William Daniell" Subject: RE: Europa-List: A lot to look forward to and be thankful for! Bud If I can do anything for you in South America let me know Will From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of ALAN YERLY Sent: Tuesday, December 23, 2008 21:27 Subject: Europa-List: A lot to look forward to and be thankful for! I looked at all my family visiting tonight at dinner, and am thankful not just for them but my extended family of aviation enthusiasts, Europa builders and owners. I can't believe how blessed I am with good health (allowing for the extra fat and baldness), an excellent airplane design to go thrashing about in, and a family of Europa builders and fliers, who share their experiences and even allow an dumb fighter pilot like me to share my experiences with them once in a while. (Don't forget Mat Dralle as keeper of the site we all use.) As a dealer for the aircraft, I am thankful that you all contributed to keeping the spirit of Europa alive, and as a result, we are blessed to have a revival of the company. Believe it or not, all your suggestions are being worked, massaged, cost analyzed, and already some are being implemented. Thanks to Roger Bull, and John Wheeler for carrying the flag, and now under the leadership of Dave Stanbridge the company enjoys new energy and is progressing at a brisk pace. Marketing strategies are in place, air-show dates set, the website is drawing potential buyers, advertising is coming out soon, and more importantly, your feedback is making the product better, easier to build, and cost effective. Since I last spoke at the Rough River Fly-in, we have really taken off. The aircraft is being worked from nose to tail. From tail plane mods to new nose wheel axels, new parts and construction methods are coming to make the plane easier to build and maintain. From wingtip to wingtip, manufacturing efficiencies are being tested, evaluated and implemented. The motor glider wing is in final test and approval phase for world wide sales, and a whole new LSA wing is in design. Gross weight increases and structural analysis evaluations are in the works also. All this adds value to our existing aircraft. There is a new spirit at Europa and I am excited to be part of it. In the next few months, you will see more coming, and we look forward to your input. Please keep the information on your experiences, performance, and suggestions coming. All of your contributions are important. They do not fall on deaf ears. After all, we are a family. Have a happy holiday season, and a safe and prosperous new year. Bud Yerly Custom Flight Creations US Europa Dealer Owner A54A now ready for engine run and airworthiness inspection. Unless I get another idea for a mod. Checked by AVG - http://www.avg.com 12:08 ________________________________ Message 2 _____________________________________ Time: 06:33:04 AM PST US From: "Remi Guerner" Subject: Europa-List: Revised Europa Specifications Hi Ira, It is interesting to compare your computed figures with those from ROTAX and DIAMOND. Based on fig.14, page 10-8 of the ROTAX 912ULS Owner Manual, the engine should be capable of producing 75 % power at 8000 ft at full throttle and 5500 RPM. This is not 75% of 100 HP but 75% of the max continuous power of 94 HP, i.e. 69 HP. At 8000 ft, full throttle, 5000 RPM, the power is 59.5 %. Below is what Diamond shows on the Katana DA20-100 Flight Manual. This aircraft is JAR-VLA certified and uses the same 912S engine. The Manual is available on line on the Diamond website. Below are their cruise figures at 8000 ft. : 5500 RPM, 22 In.Hg: 75% of max continuous power (assumed to be at full throttle): 5350 RPM, 21,7 In.Hg: 65% (probably not at full throttle) 5100 RPM, 21 In.Hg: 55% (probably not at full throttle) The Diamond figures are consistent with the Rotax ones at 5500 RPM but not for the other power settings.Your computed figures differ significantly from both the Rotax and the Diamond figures. One interesting thing is that Diamond provides fuel flow figures. This confirms the higher you fly with the Rotax, the more fuel you use. A typical exemple is 18 liters/hour at 75% at 0 ft and 23,6 l/h at the same power at 8000ft. That is a 31% increase! Regarding the advertised cruising speed of the Europa, I have made numerous measurements using the 3 way GPS method and consistently get 135 kts TAS at 8000 ft, full throttle and 5000 RPM, which is about 60% power according to Rotax. This is for an XS monowheel with 912 ULS, Airmaster prop and speed kit. So it seems that the advertised 140 kts at 75% at 8000 ft are absolutely achievable, provided you accept to cruise at 5500 RPM. Best regards and Merry Christmas Remi Guerner F-PGKL >>> At 8000' DA, the 912s can not make 75% power in cruise. Since the Rotax factory does not provide sufficient data, I modeled power Output with a simple linear model of MP and RPM. At 8000', at takeoff rpm (limit 5 min) 5750 RPM, the engine provide 73%. At 5500 (constant pitch prop), the output is 70%, and at standard cruise rpm of 5000 rpm, the output is 63%. That said, with the speed kit installed and a fresh wash, I do see in the range of 135kt TAS at 5000rpm at 8000'. ________________________________ Message 3 _____________________________________ Time: 01:52:46 PM PST US Subject: Europa-List: Re: Revised Europa Specifications From: "rampil" Hi All, Thanks for the input Remi! I think Rotax is using a sleigh of hand, inconsistently using a moving target for power output. The engine is advertised as 100 hp, and only in fine print does one see a 5 min max duration for the rated power. Therefore I was using the advertised power rating in my table, which I enclose below. I can put 75% of max continuous power in fine print on the table. The table is a simple model, but I find it useful since I lack a dyno to test with. BTW, I published the Diamond power chart some months back since it confirmed my measured fuel flows as increasing with altitude. Merry Christmas, Happy New Year, -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=220989#220989 Attachments: http://forums.matronics.com//files/912ulspower_203.pdf ________________________________ Message 4 _____________________________________ Time: 02:23:20 PM PST US Subject: Europa-List: Re: Revised Europa Specifications From: "rampil" For fun, here is some of my fight test data from June 2006 demonstrating the lack of altitude compensation of mixture in the Bing 64 carb. I keep hoping that someone will report (favorably) on the Greensky manual mixture control for the 912s -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=220992#220992 Attachments: http://forums.matronics.com//files/fuelvsalt_sheet1_128.pdf ------------------------------------------------------------------------------------- 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.