---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Thu 06/03/21: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:17 AM - Re: Airfoil Profiles (John Wighton) 2. 02:13 AM - Re: Airfoil Profiles (Area-51) 3. 02:17 AM - Re: Flap limiting speed 83 kts exceeded (JonathanMilbank) 4. 08:41 AM - US Fly-In Interest? (h&jeuropa) 5. 09:55 AM - Re: Re: Airfoil Profiles (Paul McAllister) 6. 01:26 PM - Re: US Fly-In Interest? (William Daniell) 7. 01:30 PM - Re: Airfoil Profiles (John Wighton) 8. 06:17 PM - Re: Flap limiting speed 83 kts exceeded (Paul M 383) ________________________________ Message 1 _____________________________________ Time: 12:17:49 AM PST US Subject: Europa-List: Re: Airfoil Profiles From: "John Wighton" When we scanned the Europa we used paint that was washed off afterwards. It is commonly used by street artists. An initial attempt without paint led to big gaps in the cloud data. I like the root fairings, they look a bit like Frans Veldmans who was highly active in Europa modifications. Whatever happened to Frans? The tape is probably a better idea, as it limits the data - although there are some coordinates for the sections along the wing - we used them years ago in xfoil. John W -------- John Wighton Europa XS trigear G-IPOD Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502215#502215 ________________________________ Message 2 _____________________________________ Time: 02:13:09 AM PST US Subject: Europa-List: Re: Airfoil Profiles From: "Area-51" Interested to know what polar results Xfoil popped out there John! Would still want to cross reference results to those of Ansys Fluent though. On 3d scanning; shiny surfaces are the devil... dead flat non-reflective surface is going to save a lot of mumbling...water soluble hair spray and talcum powder dust is a magic formula! Plenty of reference dots are required too... washoff flat spray paint costs a bit more :) Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502217#502217 ________________________________ Message 3 _____________________________________ Time: 02:17:20 AM PST US Subject: Europa-List: Re: Flap limiting speed 83 kts exceeded From: "JonathanMilbank" Paul, While my aircraft was a mono, the combined flap / undercarriage lever had the standard detents which held the lever either at fully retracted or fully down 27 degrees. When I decided after almost 20 years flying as a mono to convert to tri-gear, Neville Eyre told me to support the aircraft in order to partly retract the gear and use a clinometer to measure an intermediate flap position of 18 degrees. While the flaps were at that angle, I leaned into the cockpit and marked on the slotted guide plate the position of the lever. Neville then cut the guide plate in situ to create an intermediate 18 degree detent notch, which happens to lie approximately halfway along the slot. Thereafter we set about removing the mono-wheel swing arm, linkage and other unnecessary components to leave just the lever connected to the flap push-pull rod. Why Neville specified 18 degrees is something I never questioned, but we use that intermediate setting for take off on the assumption that it reduces drag while still augmenting low speed lift. It also occurs to me that if there existed a graph or table giving different Vfe speeds for various flap settings, then the Vfe for 18 degrees would be considerably higher than 83 knots; perhaps a lot closer to 100 knots. That was a long-winded explanation where I could simply have replied 'as well as'. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502218#502218 ________________________________ Message 4 _____________________________________ Time: 08:41:08 AM PST US Subject: Europa-List: US Fly-In Interest? From: "h&jeuropa" With COVID rules relaxing, how about a Europa fly-in / gathering? Were considering New River Gorge in West Virginia. There are lots of potential activities, check it out online. Beckley, KBKW is the nearest public airport and there are nearby hotels. We can try to arrange a block of rooms and a rental vehicle. Either weekend June 19-20 or June 26-27 are good for us. If interested, reply here or email america@theeuropaclub.org. Everyone is welcome, club membership not required. Jim & Heather Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502227#502227 ________________________________ Message 5 _____________________________________ Time: 09:55:03 AM PST US From: Paul McAllister Subject: Re: Europa-List: Re: Airfoil Profiles Frans bought a yacht and is sailing around the world last I heard. We haven't talked since we collaborated on our cooling drag reduction project years ago.. You can catch him on Twitter from time to time. I believe that his fairings were provided by Fred if I'm not mistaken. - Paul On Thu, Jun 3, 2021 at 2:20 AM John Wighton wrote: > > When we scanned the Europa we used paint that was washed off afterwards. > It is commonly used by street artists. An initial attempt without paint > led to big gaps in the cloud data. > > I like the root fairings, they look a bit like Frans Veldman=99s wh o was > highly active in Europa modifications. Whatever happened to Frans? > > The tape is probably a better idea, as it limits the data - although > there are some coordinates for the sections along the wing - we used them > years ago in xfoil. > > John W > > -------- > John Wighton > Europa XS trigear G-IPOD > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=502215#502215 > > =========== =========== =========== =========== =========== > > ________________________________ Message 6 _____________________________________ Time: 01:26:17 PM PST US From: William Daniell Subject: Re: Europa-List: US Fly-In Interest? Sounds like a great idea. 26 27 June would work best for us William Daniell LONGPORT +1 786 878 0246 On Thu, Jun 3, 2021 at 11:45 AM h&jeuropa wrote: > > With COVID rules relaxing, how about a Europa fly-in / gathering? We =99re > considering New River Gorge in West Virginia. There are lots of potentia l > activities, check it out online. Beckley, KBKW is the nearest public > airport and there are nearby hotels. We can try to arrange a block of > rooms and a rental vehicle. Either weekend June 19-20 or June 26-27 are > good for us. If interested, reply here or email america@theeuropaclub.or g. > Everyone is welcome, club membership not required. > > Jim & Heather > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=502227#502227 > > =========== =========== =========== =========== =========== > > ________________________________ Message 7 _____________________________________ Time: 01:30:43 PM PST US Subject: Europa-List: Re: Airfoil Profiles From: "John Wighton" Thanks Paul, l am not so surprised about the sailing adventure. Frans was very foreword thinking, it wouldnt surprise me at all if he had a stash of Bitcoin from Day 1. We met as he was based near Hoogeveen, l was acting as a delegated signatory for Fokkers A380 wing assemblies at the time. His Europa was highly modified, something that surprised me as the Dutch NVAV and authority ILT seemed pretty hot on the need to grant approvals per Mod. -------- John Wighton Europa XS trigear G-IPOD Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502233#502233 ________________________________ Message 8 _____________________________________ Time: 06:17:00 PM PST US Subject: Europa-List: Re: Flap limiting speed 83 kts exceeded From: "Paul M 383" JonathanMilbank wrote: > ...create an intermediate 18 degree detent notch, which happens to lie approximately halfway along the slot... > > Why Neville specified 18 degrees is something I never questioned, ... if ... different Vfe speeds for varying flap settings, then ... Vfe for 18 degrees would be considerably higher than 83 knots; perhaps a lot closer to 100 knots. > > That was a long-winded explanation where I could simply have replied 'as well as'. Yes it was (:-D), but it answers my question, thanks. Might 18 be the takeoff flap setting for a Trigear? I don't have one but you do and I guess it's in the Owner's Manual? This might then answer your question (on Vfe for 18) ... if you read Bud's reply and do some math(s). HTH P G-PLPM Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502236#502236 ------------------------------------------------------------------------------------- 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.