From: krnet-bounces@mylist.net To: John Bouyea Subject: KRnet Digest, Vol 347, Issue 212 Date: 5/27/2005 9:00:17 PM Send KRnet mailing list submissions to krnet@mylist.net To subscribe or unsubscribe via the World Wide Web, visit http://mylist.net/listinfo/krnet or, via email, send a message with subject or body 'help' to krnet-request@mylist.net You can reach the person managing the list at krnet-owner@mylist.net When replying, please edit your Subject line so it is more specific than "Re: Contents of KRnet digest..." Today's Topics: 1. Re: ground effect (David Mikesell) 2. 2180 VW for sale. (Steve Glover) 3. Ground effect (Colin & Bev Rainey) 4. Re: Ground effect (larry severson) 5. Almost 100 (Mark Jones) 6. cowling for Corvairs (IFLYKRS@aol.com) 7. welding retract gear (phil brookman) 8. to serge vidal (phil brookman) 9. vortex generators (phil brookman) 10. Re: cowling for Corvairs (Bob Glidden) 11. Status-Do Not Archive (JIM VANCE) 12. GP VW Rear Drive (JIM VANCE) 13. Re: Ground effect (Linda Warner) 14. Re: Status-Do Not Archive (Dan Heath) 15. ASI update (Mark Langford) 16. RE: cowling for Corvairs (Steve Bray) ---------------------------------------------------------------------- Message: 1 Date: Thu, 26 May 2005 21:19:48 -0700 From: "David Mikesell" Subject: Re: KR> ground effect To: "KRnet" Message-ID: <000d01c56273$5242d580$6801a8c0@DavidMikesell> Content-Type: text/plain; charset="iso-8859-1" Correct Larry David Mikesell 23597 N. Hwy 99 Acampo, CA 95220 209-609-8774 skyguynca@skyguynca.com www.skyguynca.com ----- Original Message ----- From: "larry severson" To: "KRnet" Sent: Thursday, May 26, 2005 8:43 PM Subject: Re: KR> ground effect > At 07:48 AM 5/27/2005 +1000, you wrote: > >I don't believe that the wing span is the determining factor. Take a > >glider with a 23 meter (75ft) wing span, there is no way your are in > >ground effect at 12 m (37ft) of the ground. Wing span, cord length, > >wing loading and spead must be in the calculation (guessing). > > > >Not being an expert, and not needing to the scinentific reasons, just > >nowing how to use it and/or deal with it is all I need know. :-) > > Sorry, but in both my classes in Aero in college, and during my > training as > an airline pilot, ground effect starts at 1/2 the wing span. (Drag due > to lift reduces by 1/2 at the 1/2 wing span height because the down > flow off the aft part of the wing is cut off.) > > > Larry Severson > Fountain Valley, CA 92708 > (714) 968-9852 > larry2@socal.rr.com > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html ------------------------------ Message: 2 Date: Thu, 26 May 2005 22:11:36 -0700 From: "Steve Glover" Subject: KR> 2180 VW for sale. To: "KR Net" Message-ID: Content-Type: text/plain; charset="iso-8859-1" Hello Netter's, I am placing my 2180 Great Plains up for sale. FWF less prop, spinner, and carb. Engine has been freshly rebuilt. All components were magnafluxed or dyeglowed. Engine can be seen at the Goldenwest EAA fly-in in Marysville, California next weekend as I am flying my KR up there. If you were at the Gathering last year you most likely saw my engine there as well. $2500 I am changing over to a Corvair. E-mail off net for inquiries. Regards, Steve Glover KR-2 N902G AJO, Ca ------------------------------ Message: 3 Date: Fri, 27 May 2005 06:41:03 -0400 From: "Colin & Bev Rainey" Subject: KR> Ground effect To: Message-ID: <012c01c562a8$94ac6140$c7432141@RaineyDay> Content-Type: text/plain; charset="iso-8859-1" Larry I am gonna knock just alittle more dust off. Ground effect actually begins the height above the ground that equals the width of the wingspan, and is most pronounced at half the width of the wingspan (where we feel its effects the most). Ground effect for fixed wing aircraft is defined as the effect that the proximity to the ground has on the airflow patterns about an aircraft's wings. It effects ALL fixed wing aircraft regardless of engine or not, or wingspan length. It has the gradually increasing effect of "straightening" the airflow out over the wings reducing drag giving a performance increase with out the associated drag component that exists at altitude. BY canceling the wingtip vortices, which restores tip lift, and smoothing airflow over the rest of the wing, reducing drag the airplane gets this performance increase. For more on this see The Airplane Flying Handbook printed by ASA and available at nearly any pilot shop, Sportys, AS&S, King Schools, and more. And while you are at it, check out the Handbook of Aeronautical Knowledge also printed by ASA. It will remind all pilots of the basics and bring you up to speed if it has been awhile since you looked at the Regs etc... Colin Rainey Sanford, FL Almost all the Corvair parts in, ready to assemble.... Trailer gone with Jim Ferris to pickup his KR2S.... ------------------------------ Message: 4 Date: Fri, 27 May 2005 07:49:29 -0700 From: larry severson Subject: Re: KR> Ground effect To: KRnet Message-ID: <5.2.1.1.0.20050527074715.017e3318@pop-server.socal.rr.com> Content-Type: text/plain; charset="us-ascii"; format=flowed >Ground effect actually begins the height above the ground that equals >the >width of the wingspan, and is most pronounced at half the width of the >wingspan (where we feel its effects the most). Ground effect for fixed >wing aircraft is defined as the effect that the proximity to the ground >has on the airflow patterns about an aircraft's wings. It effects ALL >fixed wing aircraft regardless of engine or not, or wingspan length. It >has the gradually increasing effect of "straightening" the airflow out >over the wings reducing drag giving a performance increase with out the >associated drag component that exists at altitude. BY canceling the >wingtip vortices, which restores tip lift, and smoothing airflow over the >rest of the wing, reducing drag the airplane gets this performance >increase. For more on this see The Airplane Flying Handbook printed by >ASA and available at nearly any pilot shop, Sportys, AS&S, King Schools, >and more. And while you are at it, check out the Handbook of Aeronaut That is why much of the early part of the flight of the Voyager around the world flight was down next to the water. However, the 1/2 figure is where pilots first notice the effect. Larry Severson Fountain Valley, CA 92708 (714) 968-9852 larry2@socal.rr.com ------------------------------ Message: 5 Date: Fri, 27 May 2005 14:36:13 -0500 From: "Mark Jones" Subject: KR> Almost 100 To: "KR Net \(E-mail\)" Message-ID: <26D1C67793459F43BF8DA235F92B1F3549DAF0@tulsaexchange.tulsaokmail.com> Content-Type: text/plain; charset="iso-8859-1" It sure is quiet on the Net today. So, do all of you realize it is only 105 days till the KR Gathering. If you are still only thinking about going to the Gathering, go ahead and make the commitment to be there. The rest of us would sure love to have you attend. If your plane is getting close to being finished, this is the motivation to get yourself in high gear and fly to the Gathering. There will be a new breed of KR's at the Gathering this year with a lot of exciting ideas and modifications. New records will be set again in both planes and attendance. I WANT YOU to help us make this happen by being there, whether you fly or drive or hitch hike. We are calling a family meeting September 9-11 and expect all family members to be there. You do not want to be absent because if you are, you will miss the most exciting KR event of the year. Plus, you could be the topic of discussion and not be there to defend yourself. BE THERE. If you are a die-hard KR fanatic, I will see you in 104 days. :-) Mark Jones (N886MJ) Wales, WI Visit my web site: http://mywebpage.netscape.com/n886mj Email: flykr2s@wi.rr.com ------------------------------ Message: 6 Date: Fri, 27 May 2005 18:18:01 EDT From: IFLYKRS@aol.com Subject: KR> cowling for Corvairs To: krnet@mylist.net Message-ID: <75.4635398e.2fc8f699@aol.com> Content-Type: text/plain; charset="US-ASCII" As some of you know, I have been working on a cowling for the Corvair converted KRs. This new cowling will allow the use of William Wynne's front starter kit and eliminate the need for any prop extention. I would encourage anyone using the Corvair to use this cowling or build your own, or modify the Langford cowl in such a way as to eliminate any prop extension. The accident of Bob Lester's happened because of a broken crankshaft. Against better judgment, he had a 4" prop extension on the hub. When he installed the hub, some loctite was on the surface and caused an out-of-round sitiation of .050 at the hub! This causes a serious wobble to the prop and crank and over time weakened the crank. This is our prognosis so far. To date, no Corvair engine has had a crank failure using the WW prop hub or any other short hub designed since the 1960's. The extra inches exaggerate any problems with prop balance, spinner, or installation those forces are sent to the crank. The Corvair vs. VW crank failure rate is still enviable but as a corvair KR pilot, I will be installing the new cowl and front starter as soon as they leave the mold. I figure I have about 20 hours of flying before then and will be doing so at high altiitude with lots of options. I love the corvair conversion but like any other engine you learn its weak links and the adjust accordingly. Build sensibly and safely. N41768 175 hours and counting......Flying to Tennessee tomorrow and then maybe on the see Mark Langford. Still having fun. The Gathering is coming! Bill ------------------------------ Message: 7 Date: Sat, 28 May 2005 00:00:06 +0100 From: "phil brookman" Subject: KR> welding retract gear To: Message-ID: <011f01c5630f$d3181fc0$73a51352@philljl2re6t9i> Content-Type: text/plain; charset="iso-8859-1" to all those who responded thanksbut i meant welding the ali castings not the spring bar , anyway making a fixed gear u/c out of something similar to 7075 18mm to give it a bit more height and push those whells forward phil -------------- next part -------------- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.15 - Release Date: 22/05/2005 ------------------------------ Message: 8 Date: Sat, 28 May 2005 00:01:24 +0100 From: "phil brookman" Subject: KR> to serge vidal To: Message-ID: <012d01c56310$01c80740$73a51352@philljl2re6t9i> Content-Type: text/plain; charset="iso-8859-1" i believe you are in france have you found any good value insurance , the e.u has made us take out insurance , i am after liability only if you have some details phil -------------- next part -------------- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.15 - Release Date: 22/05/2005 ------------------------------ Message: 9 Date: Sat, 28 May 2005 00:12:58 +0100 From: "phil brookman" Subject: KR> vortex generators To: Message-ID: <016201c56311$9f42dbc0$73a51352@philljl2re6t9i> Content-Type: text/plain; charset="iso-8859-1" ok has anyone done it , they sound good sounds a lot safer to me with them ,i will even sacrifice some spped to get the stall down and quicker t/o philtPart_000_015C_01C5631A.0104D2C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
ok has anyone done it , they sound good sounds a lot safer to me with them ,i will even sacrifice some spped to get the stall down and quicker t/o
phil
------=_NextPart_000_015C_01C5631A.0104D2C0-- -------------- next part -------------- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.15 - Release Date: 22/05/2005 ------------------------------ Message: 10 Date: Fri, 27 May 2005 18:16:02 -0500 From: "Bob Glidden" Subject: Re: KR> cowling for Corvairs To: "KRnet" Message-ID: <041301c56312$0d3ba120$6501a8c0@ADMINISTRATOR> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original What kind of price are you thinking about for the new cowling you are designing?How are you designing it without a hump in the front for the front starter,and still able to see over the nose in a tail dragger? Bob Glidden Eminence,Indiana KR2S N181FW (building) Corvair 110 glidden@ccrtc.com This new cowling will allow the use of William Wynne's front > starter kit and eliminate the need for any prop extention. ------------------------------ Message: 11 Date: Fri, 27 May 2005 18:56:29 -0500 From: "JIM VANCE" Subject: KR> Status-Do Not Archive To: "krnet" Message-ID: <000801c56317$b45fc4e0$0600a8c0@oemcomputer> Content-Type: text/plain; charset="iso-8859-1" Since it's so quiet, I'll update my status. My KR-2 is essentially finished. I need to check that my Ellison TBI is set right on my 1915 cc Great Plains VW, then I'll be ready to run the engine up. Then comes the airworthiness inspection. I won't make any promises about getting it to the Gathering, but I'll sure try. Jim Vance, N303JV Vance@ClaflinWildcats.com ------------------------------ Message: 12 Date: Fri, 27 May 2005 18:59:23 -0500 From: "JIM VANCE" Subject: KR> GP VW Rear Drive To: "krnet" Message-ID: <001101c56318$1bcb4b40$0600a8c0@oemcomputer> Content-Type: text/plain; charset="iso-8859-1" Has anyone had experience with the rear drive? I've been told that one person had it fail in less than an hour's run time. I've heard no other comments, pro or con. I just want to see if I should run the engine at cruise power for several hours before the big flight. I sure wouldn't want to practice an engine out landing on the first flight. Jim Vance Vance@ClaflinWildcats.com ------------------------------ Message: 13 Date: Fri, 27 May 2005 20:22:25 -0400 From: jaslkw@webtv.net (Linda Warner) Subject: Re: KR> Ground effect To: krnet@mylist.net (KRnet) Message-ID: <5335-4297B9C1-4987@storefull-3137.bay.webtv.net> Content-Type: Text/Plain; Charset=US-ASCII Not many of you are old enough to remember a gentleman named Max Conrad who set many long distance records in the 50's and 60's. He claimed to have achieved these long distance flights by flying only a few feet above the sea and staying in ground (sea) effect. Must have worked OK for him. John Sickafoose Naples, Fl ------------------------------ Message: 14 Date: Fri, 27 May 2005 20:28:19 -0400 (Eastern Daylight Time) From: "Dan Heath" Subject: Re: KR> Status-Do Not Archive To: Message-ID: <4297BB23.000005.02772@DANHOMECOMPUTER> Content-Type: Text/Plain; charset="iso-8859-1" Congratulations, I hope we are not far behind you and that we both make it to the gathering. Oh, and please update your status anytime you like. I sure like hearing about that vs another discussion on WAF. See you in Mt. Vernon - 2005 - KR Gathering See N64KR at http://KR-Builder.org - Then click on the pics There is a time for building and a time for FLYING and the time for building has expired. Daniel R. Heath - Columbia, SC ------------------------------ Message: 15 Date: Fri, 27 May 2005 21:26:52 -0500 From: "Mark Langford" Subject: KR> ASI update To: "KRnet" Message-ID: <065201c5632c$b5eaec30$1202a8c0@1700xp> Content-Type: text/plain; charset="iso-8859-1" I received my UMA RV airspeed indicator from AS&S yesterday, and tested it last night. It reads 10% low at 40 mph, 7% high at 57.5 mph, 3% high at 80 mph, and averages 2% high up to 200 mph. Probably good enough for KR work, so I guess I'll keep it. The best thing about it is that it has colored markings painted right on the face, and it only cost $140. Top scale is 260 mph, which is way optimistic, but I might need to know at what airspeed the tail fluttered and fell off. I also bought some of their static ports, and installed them in the fuselage sides midway between the wing and tail feathers. I made a pitot tube extension and temporarily installed it, although I don't think that's a factor. ASI is installed, plane is fueled, and if the weather is perfect, I may fly it early in the morning. If I don't fly it in the morning, the rest of the weekend is somewhat iffy. I've gotten a lot of encouragement that so far I'm not doing too bad (having survived my first flight attempt), so with an ASI that actually works, I'm beginning to think I could actually land the thing in one piece. You can bet I'll call 1-800-WXBRIEF before I go out there though. The weather for the last four days have been perfect, but I had to put that ASI and static system in before I could fly it. If you'd like to see a "field stripped" KR2S (as of 2 hours ago) check out http://home.hiwaay.net/~langford/05052728m.jpg . You can see one of the new static ports on the fuselage. Stub to outer wing gap seals are made out of vertical blinds from Home Depot for the moment, but I'll lay up some glass on them this weekend and make a lighter versoin of the gap seal. Funny thing about working on that plane is that people keep walking up and introducing themselves, wanting to find out more about it.... Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net -------------------------------------------------------------- ------------------------------ Message: 16 Date: Fri, 27 May 2005 22:41:22 -0500 From: "Steve Bray" Subject: RE: KR> cowling for Corvairs To: krnet@mylist.net Message-ID: Content-Type: text/plain; format=flowed Where in Tennessee?? Steve Bray Jackson, Tennessee >From: IFLYKRS@aol.com >Reply-To: KRnet >To: krnet@mylist.net >Subject: KR> cowling for Corvairs >Date: Fri, 27 May 2005 18:18:01 EDT > >As some of you know, I have been working on a cowling for the Corvair >converted KRs. This new cowling will allow the use of William Wynne's >front >starter kit and eliminate the need for any prop extention. I would >encourage >anyone using the Corvair to use this cowling or build your own, or modify >the >Langford cowl in such a way as to eliminate any prop extension. The >accident of >Bob Lester's happened because of a broken crankshaft. Against better >judgment, he had a 4" prop extension on the hub. When he installed the >hub, some >loctite was on the surface and caused an out-of-round sitiation of .050 at >the >hub! This causes a serious wobble to the prop and crank and over time >weakened the crank. This is our prognosis so far. To date, no Corvair >engine has >had a crank failure using the WW prop hub or any other short hub designed >since the 1960's. The extra inches exaggerate any problems with prop >balance, >spinner, or installation those forces are sent to the crank. The Corvair >vs. >VW crank failure rate is still enviable but as a corvair KR pilot, I will >be installing the new cowl and front starter as soon as they leave the >mold. >I figure I have about 20 hours of flying before then and will be doing so >at >high altiitude with lots of options. I love the corvair conversion but >like >any other engine you learn its weak links and the adjust accordingly. >Build >sensibly and safely. > >N41768 175 hours and counting......Flying to Tennessee tomorrow and then >maybe on the see Mark Langford. Still having fun. The Gathering is >coming! > >Bill >_______________________________________ >Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net >please see other KRnet info at http://www.krnet.org/info.html ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 347, Issue 212 *************************************** ================================== ABC Amber Outlook Converter v4.20 Trial version ==================================