---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sat 04/24/10: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:28 AM - Re: Rotax carb choke problem (Kevin Klinefelter) 2. 08:12 AM - Re: Day VMC only (rampil) 3. 12:37 PM - Re: Instrument module cooling/demisting fans. (rparigoris) 4. 02:36 PM - Rotax air consumption (Paul McAllister) 5. 02:56 PM - Re: PH-DIY first flight! (Frans Veldman) 6. 03:52 PM - Re: PH-DIY first flight! (DuaneFamly@aol.com) 7. 04:20 PM - Re: Rotax air consumption (rparigoris) 8. 04:25 PM - Re: PH-DIY first flight! (rparigoris) 9. 04:50 PM - Re: Re: PH-DIY first flight! (Paul McAllister) 10. 08:02 PM - Re: Rotax air consumption (craig bastin) ________________________________ Message 1 _____________________________________ Time: 07:28:14 AM PST US From: "Kevin Klinefelter" Subject: Re: Europa-List: Rotax carb choke problem Hi Franz, When you recheck your float bowls for the choke problem you are having, you can just pull the bowls without removing the carb from the engine? At least that's what I would try first because I'm lazy! Kevin ________________________________ Message 2 _____________________________________ Time: 08:12:23 AM PST US Subject: Europa-List: Re: Day VMC only From: "rampil" There are different classes of experimental aircraft in the US. Some types are restricted to certain areas or require FAA notification to move. These restrictions do not encumber owner-built experimental aircraft in practice. -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=295548#295548 ________________________________ Message 3 _____________________________________ Time: 12:37:41 PM PST US Subject: Europa-List: Re: Instrument module cooling/demisting fans. From: "rparigoris" Figure if anyone is interested in installing cooling fans, might as well keep in archives a slick way to give you high and low speeds (you need an even number of fans). The LED either gets full voltage or half. http://www.europaowners.org/forums/gallery2.php?g2_itemId=79799 Ron Parigoris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=295565#295565 ________________________________ Message 4 _____________________________________ Time: 02:36:54 PM PST US Subject: Europa-List: Rotax air consumption From: Paul McAllister Hi all, I was wondering if anyone has come across any Rotax 914 data that will tell me the airflow into the engine for various power settings. I have looked on a few of the auto enthusiasts web sites and for the follow parameters I get: 0 centigrade 5100 RPM 30" I get 87,700 cfm Does that sound about right ? ________________________________ Message 5 _____________________________________ Time: 02:56:52 PM PST US From: Frans Veldman Subject: Re: Europa-List: PH-DIY first flight! On 04/22/2010 02:55 AM, Kevin Klinefelter wrote: > I hope you > both have as much fun as I am having! Sure we have!!! Today we both have been flying, first with our test pilot, and after a few touch & go's we were released and could fly ourselves. The PH-DIY is flying better than we ever hoped for! A very light and responsive airplane. Easy to fly as well. We just have to get used to the very light controls (everything we did in the Cessna we have to divide by 4 or so), and of course it is interesting to reach pattern altitude after take off before even reaching the crosswind leg. We think it is easier to get use to, than to wean off it. The stall is indeed benign and can be executed hands off, with and without flaps. It is a total non event, with plenty of warning in the form of buffeting, and the aircraft will recover without human intervention. Keep the stick fully aft and she will descend in a rocking motion, alternating stalling and recovering by herself. The performance is great! The test pilot first took her out alone, to measure the performance again, but this time in still air (couldn't believe what he had seen during the first flight), but came back with the famous Europa grin and told us that it was even better than he thought it was! This thing is blazingly fast! We put a small rudder trim tab on the rudder (btw, yes, the engine is perfectly aligned), and the trim tab was perfect on the first try. Problem solved. There are a few minor issues with the avionics, but nothing serious. We now know why we have put so much time in this project. To everyone not yet reached the flying stage: It is worth it! Well, no time for a more detailed review, we are going to sleep, so we can do tomorrow morning a quick check of all essentials, and then... go somewhere! Frans ________________________________ Message 6 _____________________________________ Time: 03:52:38 PM PST US From: DuaneFamly@aol.com Subject: Re: Europa-List: PH-DIY first flight! Congratulations on your accomplishment! I bet the "grin" is even there while you are sleeping. Keep the stick fully aft and she will descend in a rocking motion, alternating stalling and recovering by herself. Didn't they used to refer to this as a falling leaf descent. Used by people that were not IFR rated, or in a non-IFR aircraft, but got stuck on top of a thick cloud layer. Prevented spatial disorientation and subsequent loss of control until you were below the cloud base and back in VFR? Mike Duane A207A Redding, California XS Conventional Gear Jabiru 3300A Sensenich R64Z N Ground Adjustable Prop ________________________________ Message 7 _____________________________________ Time: 04:20:55 PM PST US Subject: Europa-List: Re: Rotax air consumption From: "rparigoris" Hi Paul I am not quite sure how to deal with turbo, venturi restriction and exhaust restriction but your number of 87,700 cfm seems quite off. Lets take a simple look at the 914 as a simple air pump not developing any pressure. We need to keep in mind that since it is a four stroke, you only intake the displacement once every other revolution. Thus you only intake 1/2 of the 1211cc displacement every revolution (two full breaths of the four) or 605.5cc per revolution. Now lets take 5100rpm and multiply it 605.5cc to give us the cc per minute of air pumped, then multiply it by conversion number of .000035314 to convert cc to cf. That gives us a tad over 109 cfm. Not sure what you are after, but a 650cfm carb is quite a big beast compared to the ability of two type 64 Bing carbs. I can't imagine how large an engine would be that could handle a 87,700cfm carb, but then again you are looking for something else? Exhaust design? Or? You could always measure the exhaust of engine running at that power setting. Take several sheets of large plastic and make an enclosure. Calculate internal area and plumb your exhaust to it and time to fill. Now if you are talking about how many cfm of air the propellor could flow at 30" and 5100rpm with your Airmaster "ground loop" adjustible prop, perhaps the 87K is a lot closer. A 10hp motor running a 30" prop may push perhaps 20 or 25K of air per minute at a very low pressure. My basis for this estimate is my homebuilt balloon is 95,036cf and I can fill it in under 4 minutes, but then there is some spill out from the 15 foot diameter mouth. Hope that helps. Ron Parigoris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=295585#295585 ________________________________ Message 8 _____________________________________ Time: 04:25:33 PM PST US Subject: Europa-List: Re: PH-DIY first flight! From: "rparigoris" Hi Frans Sounds like power off stalls are benign. Have you practiced any power on stalls? Ron Parigoris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=295586#295586 ________________________________ Message 9 _____________________________________ Time: 04:50:53 PM PST US Subject: Re: Europa-List: Re: PH-DIY first flight! From: Paul McAllister In my airplane they are called loops.... :) do not archive On Sat, Apr 24, 2010 at 6:24 PM, rparigoris wrote: > rparigor@suffolk.lib.ny.us> > > Hi Frans > > Sounds like power off stalls are benign. Have you practiced any power on > stalls? > > Ron Parigoris > ________________________________ Message 10 ____________________________________ Time: 08:02:14 PM PST US From: "craig bastin" Subject: RE: Europa-List: Rotax air consumption I think you are way off there, typical V8 car engine, with after market performance carb are set up for between 600 and 800cfm, you might be out by a factor of 1000, 87cfm would seem a bit low though. -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com]On Behalf Of Paul McAllister Sent: Sunday, April 25, 2010 7:28 AM To: europa-list@matronics.com Subject: Europa-List: Rotax air consumption Hi all, I was wondering if anyone has come across any Rotax 914 data that will tell me the airflow into the engine for various power settings. I have looked on a few of the auto enthusiasts web sites and for the follow parameters I get: 0 centigrade 5100 RPM 30" I get 87,700 cfm Does that sound about right ? ------------------------------------------------------------------------------------- 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.