From: krnet-bounces@mylist.net To: John Bouyea Subject: KRnet Digest, Vol 346, Issue 105 Date: 9/5/2004 8:59:39 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: Getting ready to fly (TNCOMPRESSORMAN@aol.com) 2. Re: Getting ready to fly (Edward Seaman) 3. Re: VW duel ignition (Phillip Matheson) 4. Re: KRnet stickers (Phillip Matheson) 5. Re: KR Gatherring (Tommy Waymack) 6. Mark J - KR history (Stephen Jacobs) 7. Exhaust (Kenneth B. Jones) 8. Re: Getting ready to fly (VIRGIL N SALISBURY) 9. Re: Exhaust (Mark Langford) 10. polystyrene (Eric Evezard) 11. PVC Tanks (Eric Evezard) 12. RE: polystyrene (Stephen Jacobs) 13. Re: polystyrene (Scott & Jane) 14. RE: polystyrene (Stephen Jacobs) 15. Re: Exhaust (Orma) 16. Re: polystyrene (VIRGIL N SALISBURY) 17. Getting ready to fly (Orma) 18. KR's For Sale (JIM VANCE) 19. Post of the week - Instrument panel wired and plumbed (Dan Heath) 20. Re: Exhaust (Kenneth B. Jones) 21. Re: Exhaust (Mark Langford) 22. Re: Mark J - KR history (Mark Jones) 23. Re: VW duel ignition (Mark Langford) ---------------------------------------------------------------------- Message: 1 Date: Sun, 5 Sep 2004 00:49:13 EDT From: TNCOMPRESSORMAN@aol.com Subject: Re: KR> Getting ready to fly To: krnet@mylist.net Message-ID: <74.412fe3af.2e6bf4c9@aol.com> Content-Type: text/plain; charset="US-ASCII" Tonight I must decide procedure to use on takeoff. With the control connected to the cockpit it is easy to see that I could apply full power with the throttle and add boost afterwards. Orma, You might want to keep in the back of your mind, that as airspeed increases the prop will unload, rpms and manifold pressure will increase. Be careful not to use too much MAP on your first flights and have a contingency plan in case the engine were to seize or burn a piston. A type 4 could probably take high rpms better than it would stand for too much boost pressure. Be careful and open the performance envelope slowly. Just my 2 cents worth. Good Luck!! Riley Collins Rutledge, TN ------------------------------ Message: 2 Date: Sun, 5 Sep 2004 07:29:05 +0100 (BST) From: Edward Seaman Subject: Re: KR> Getting ready to fly To: KRnet Message-ID: <20040905062905.16015.qmail@web25305.mail.ukl.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 Ouch Orma - I think I am more frustrated about the last minute hang ups than you are - I am dead keen to see how she goes. Maybe this is obvious, but boost is not neccessarily directly related to rpm - en engine can also be over boosted at low rpm. In fact, I think high MAP at low rpm is worse - that's the reason we are taught to increase rpm before we increase power when throttling up. Good luck mate Ed ___________________________________________________________ALL-NEW Yahoo! Messenger - all new features - even more fun! http://uk.messenger.yahoo.com ------------------------------ Message: 3 Date: Sun, 5 Sep 2004 16:45:34 +1000 From: "Phillip Matheson" Subject: Re: KR> VW duel ignition To: "KRnet" Message-ID: <003401c49313$f2a7c740$cb96dccb@StationW2k04> Content-Type: text/plain; charset="iso-8859-1" Am I only dreaming, or does someone know of a single distributor, twin point, separate ignition that will fit a type 4 VW?? for the 8 spark set up. Instead of using a Mag. Phillip Matheson matheson@dodo.com.au Australia VH PKR See our engines and kits at. http://www.vw-engines.com/ http://www.homebuilt-aviation.com/ See my KR at Mark Jones web http://mywebpage.netscape.com/n886mj/pmkr2.html ------------------------------ Message: 4 Date: Sun, 5 Sep 2004 16:52:59 +1000 From: "Phillip Matheson" Subject: Re: KR> KRnet stickers To: "KRnet" Cc: John Bavington Message-ID: <004301c49314$fbc1af20$cb96dccb@StationW2k04> Content-Type: text/plain; charset="iso-8859-1" Peter, John I have found that I can get ?? Cheap water transfer, that would need a clear protection over it, if fitted to a plane in the sun, Clear lacquer or sign writing film. 4" Dia.?? Would this interest you? I can get them locally, and turn the globe around, to show Australia, and or write Australia or Down under on them. Comments Please. I would have to get a min of 100 or more of the normal transfer type sticker.Very Expensive.???? $100's Phillip Matheson matheson@dodo.com.au Australia VH PKR See our engines and kits at. http://www.vw-engines.com/ http://www.homebuilt-aviation.com/ See my KR at Mark Jones web http://mywebpage.netscape.com/n886mj/pmkr2.html ------------------------------ Message: 5 Date: Sat, 4 Sep 2004 21:20:27 -0500 From: "Tommy Waymack" Subject: KR> Re: KR Gatherring To: Message-ID: <000501c492ee$e9035d00$6800a8c0@blindate> Content-Type: text/plain; charset="iso-8859-1" Last weekend I had just put the engine together to get a jump on geting the plane ready.Well it ran great,only the crack I found in the case was leaking oil.So what if it leaks?Got on the horn and now spending my weekend with the new case and parts all over the shop.No problem,see you guys in Mt Vernon.Tommy W. ----- Original Message ----- From: To: Sent: Friday, September 03, 2004 10:59 PM Subject: KRnet Digest, Vol 346, Issue 103 > 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: Tail Plane Weight (Phillip Matheson) > 2. RE: William Clapp = fuel tanks (Wood, Sidney M.) > 3. KRNet factoid (Oscar Zuniga) > 4. Getting ready to fly (Orma) > 5. Re: Getting ready to fly (Dean Cooper) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 3 Sep 2004 16:36:45 +1000 > From: "Phillip Matheson" > Subject: Re: KR> Tail Plane Weight > To: "KRnet" > Message-ID: <008701c49180$6249c660$4097dccb@StationW2k04> > Content-Type: text/plain; charset="iso-8859-1" > > I was asked to weight my complete tail plane and sent it to one of the > net members, so I'll let everyone know > > 7 feet, (83inches) with Elevator attached, 5 REB's and horn , almost ready > to prime. > > 6.5 Kg = 14lbs > > > Phillip Matheson > matheson@dodo.com.au > Australia > VH PKR > See our engines and kits at. > http://www.vw-engines.com/ > http://www.homebuilt-aviation.com/ > See my KR at Mark Jones web > http://mywebpage.netscape.com/n886mj/pmkr2.html > > > > > > > > > > ------------------------------ > > Message: 2 > Date: Fri, 3 Sep 2004 07:59:10 -0400 > From: "Wood, Sidney M." > Subject: RE: KR>William Clapp = fuel tanks > To: "KRnet" > Message-ID: > > Content-Type: text/plain; charset="iso-8859-1" > > Several years ago I tried an experiment using 1-1/2 inch schedule 40 > black PVC water pipe. I cut 3 sections, each about 16 inches long, capped one end using PVC cement and filled each about 2/3 full with auto gas (Exxon 93 octane). I capped the top end using PVC cement. I set the tubes on end in an empty coffee can. Once a month I weighed the tubes. They were gradually loosing weight. After six months the sealed tubes were back to their original empty weight. No liquid was left to slosh. When I sawed the tubes open, there were no deposits inside, just a faint smell of gasoline. Apparently the auto fuel evaporated through the PVC. The PVC did not appear to be damaged by the auto gas. > Your results may vary. > Sid Wood > Tri-gear KR-2 N6242 > Mechanicsville, MD USA > Sidney.wood@titan.com > > Mark, > > I think you said the other day that he used PVC pipe for wing tanks. I would > like to know more about how he did this. Sounds to me like a really > good Idea! > > > Chris Theroux > Gilbert, AZ > > > > > > ------------------------------ > > Message: 3 > Date: Fri, 03 Sep 2004 13:10:18 -0500 > From: "Oscar Zuniga" > Subject: KR> KRNet factoid > To: krnet@mylist.net > Message-ID: > Content-Type: text/plain; format=flowed > > Just an item of interest. There is a hit counter at the bottom of the home > page at http://www.krnet.org and it's currently showing nearly 260,000 hits > since it was initiated 7-1/2 years ago in 1997. A little simple math seems > to indicate that that is better than 95 hits per day, or almost one visitor > to the site every 15 minutes of every day (on average)! > > Oscar Zuniga > San Antonio, TX > mailto: taildrags@hotmail.com > website at http://www.flysquirrel.net > > > > > > ------------------------------ > > Message: 4 > Date: Fri, 3 Sep 2004 22:55:45 -0400 > From: "Orma" > Subject: KR> Getting ready to fly > To: "KRnet" > Message-ID: <000a01c4922a$adbdb7f0$1e29d445@ROBBINS1> > Content-Type: text/plain; charset="iso-8859-1" > > Hello Net > > I hope the KR net is up. I only see one post and that is unusual. > Today was another full day at the airport. I installed a good control for the waste gate; tightened some fuel lines; reconnected the cabin heat; reinstalled all scat tubing; safety wired my gasolator; and adjusted the magneto among other things. At this point it is fair to ask when will it fly? Tomorrow seems as good a day as any. I watched the wind all day today and noted that it was 90 degrees to the runways. For the first flight of the KR in 6 months, I want the wind down the runway. I don't know what to expect from the P factor, because of the extra power. Tonight I must decide procedure to use on takeoff. With the control connected to the cockpit it is easy to see that I could apply full power with the throttle and add boost afterwards. But, as the boost control and the stick are close to each other and require the same hand. that will probably cause me to apply boost before applying throttle. With a partially closed gate, I can increase the throttle till I see 3300 on the tach. With the gate fully closed I can overboost. I don't know how much, it's just that the throttle is still not fully open and I can tell that the boost will go over 40. I have not tried this without the chocks installed. I probably have more power then the brakes can handle. In that case I could apply boost on the roll. In reality what I should probably do it to increase the pitch on the prop before the first flight so that I can simply push the throttle to the panel and know that the engine will not over speed or boost. > > Trying to get airborne > Orma > Southfield, MI > N110LR celebrating 20 years > To the gathering or bust > > > ------------------------------ > > Message: 5 > Date: Fri, 3 Sep 2004 23:14:35 -0400 > From: "Dean Cooper" > Subject: Re: KR> Getting ready to fly > To: "KRnet" > Message-ID: <002101c4922d$4e774740$0502a8c0@office> > Content-Type: text/plain; charset="iso-8859-1" > > Orma wrote: > > I hope the KR net is up. I only see one post and that is > unusual...Tomorrow seems as good a day as any. > > > Orma, > > It has been quite today. Hopefully, everyone is busy building. Good > luck on your flight tomorrow! > > > Dean Cooper > Jacksonville, FL > Email me at dean_cooper@bellsouth.net > See my KR project at www.geocities.com/djramccoop1/KR2_Home.html > > > > > > ------------------------------ > > _______________________________________________ > See KRnet list details at http://www.krnet.org/instructions.html > > End of KRnet Digest, Vol 346, Issue 103 > *************************************** ------------------------------ Message: 6 Date: Sun, 5 Sep 2004 15:03:40 +0200 From: "Stephen Jacobs" Subject: KR>Mark J - KR history To: "'KRnet'" Message-ID: <000001c49348$c7a69cd0$b164a8c0@home> Content-Type: text/plain; charset="us-ascii" Hi Mark I have had a question for some time, but was never sure who would know the correct answer. I was browsing the Airventure Museum site and noted that you had contributed to establishing the history / evolution of the KR's it figured that you would be the best person to ask. The original (early) KR editorial always refers to polystyrene foam - never mentions polyurethane. Is this correct and, if so, do you know when plans changed to poly-U? Were some KR\s built with polystyrene 9styro foam)? Take care Steve J ------------------------------ Message: 7 Date: Sun, 5 Sep 2004 09:34:05 -0400 From: "Kenneth B. Jones" Subject: KR> Exhaust To: "KRnet" Message-ID: <000a01c4934d$0415d100$c17ba8c0@CPQ22088114832> Content-Type: text/plain; charset="iso-8859-1" I recently realized that the KR-2 that I purchased has a very restricted exhaust system. The engine exhaust ports are 1.5" while the exhaust pipes are 1.0". (Champs and Cubs have 1.5" exhausts.) This means that the exhaust area is reduced by about 50%. This is on a Continental A65 (65 H.P., 171 cu. in.) engine. This same basic engine model produces up to 80 H.P. at higher rpm. Does anyone have an opinion on the effects (power, engine life, temperature, etc.) of this restriction? I have 4 pipes and no mufflers or other restrictions. I temporarily installed Champ exhausts with no change in static RPM (2200). I couldn't fly because I couldn't install my cowling. Ken Jones N5834 24.8 test hrs, 15.2 to go. ------------------------------ Message: 8 Date: Sun, 5 Sep 2004 09:21:04 -0400 From: VIRGIL N SALISBURY Subject: Re: KR> Getting ready to fly To: krnet@mylist.net Message-ID: <20040905.094323.432.0.virgnvs@juno.com> Content-Type: text/plain; charset=us-ascii Keep your carb air inlet temp below 145 F, Virg On Sun, 5 Sep 2004 00:49:13 EDT TNCOMPRESSORMAN@aol.com writes: > Tonight I must decide procedure to use on takeoff. With the control > > connected to the cockpit it is easy to see that I could apply full > power with the > throttle and add boost afterwards. > > Orma, > > You might want to keep in the back of your mind, that as airspeed > increases > the prop will unload, rpms and manifold pressure will increase. Be > careful not > to use too much MAP on your first flights and have a contingency > plan in case > the engine were to seize or burn a piston. A type 4 could probably > take high > rpms better than it would stand for too much boost pressure. Be > careful and > open the performance envelope slowly. Just my 2 cents worth. > > Good Luck!! > > Riley Collins > Rutledge, TN > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > Virgil N. Salisbury - AMSOIL www.lubedealer.com/salisbury Miami ,Fl ------------------------------ Message: 9 Date: Sun, 5 Sep 2004 09:41:27 -0500 From: "Mark Langford" Subject: Re: KR> Exhaust To: "KRnet" Message-ID: <02c901c49356$6d24df20$1202a8c0@basement> Content-Type: text/plain; charset="iso-8859-1" > I recently realized that the KR-2 that I purchased has a very > restricted exhaust system. The engine exhaust ports are 1.5" while > the exhaust pipes are 1.0". (Champs and Cubs have 1.5" exhausts.) > This means that the exhaust area is reduced by about 50%. Actually, it's a lot worse than that. Remember it's radius squared times pi, so it's really 1.77 square inches versus .78", a factor of about 2.25x. Pretty big difference. I don't claim to be a VW aircraft power expert, but I'd think 1" would be too small too, although 1.5 might be too much, considering the rpm we're running. 1.25" might be a good guess for the individual runners, before they meet up into a Y or something. GPASC's catalog doesn't mention how big their pipes are. I guess the thing to do is see what everybody else is sucessfully running and go with that, which is probably what you were looking for, rather than having your math corrected. Hope to have rudder and tailwheel permanently installed before the day is over... Mark Langford, Huntsville, Alabama N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford ------------------------------ Message: 10 Date: Sun, 5 Sep 2004 16:19:35 +0200 From: "Eric Evezard" Subject: KR> polystyrene To: "KRnet" Message-ID: <00b701c49358$c034afe0$abce07c4@r5c9m8> Content-Type: text/plain; charset="iso-8859-1" Stephen,If my memory serves me correctly,all the early KRs in SA were built using polystyrene foam.About 30 years ago an article appeared in Wings Mag.(SA) describing the KR as "the amazing little plane built from cooler boxes and piano hinges"It was in all a very inspiring article.I think polystyrene preceeded these modern day foams of today.This foam was easily obtainable,even from the refrigeration industry.I used 24 density polystyrene foam.Epoxy resin must be used.Polyester and most glues and solvents will melt it. Regards to all , Eric Evezard (S.Africa) ------------------------------ Message: 11 Date: Sun, 5 Sep 2004 16:37:04 +0200 From: "Eric Evezard" Subject: KR> PVC Tanks To: "KRnet" Message-ID: <00b801c49358$c159a7e0$abce07c4@r5c9m8> Content-Type: text/plain; charset="iso-8859-1" Sidney,you are correct with your experiment.My son had an off road motorcycle and no stickers would stick to the fuel tank for long.A fume sweat released the stickers.Similarly some commercial and outboard motor fuel tanks have all instructions molded into the tank as stickers would fall off. I am not sure of the plastic materials used in some tanks.Results vary. Best Regards, Eric Evezard, S.Africa ------------------------------ Message: 12 Date: Sun, 5 Sep 2004 18:03:18 +0200 From: "Stephen Jacobs" Subject: RE: KR> polystyrene To: "'KRnet'" Message-ID: <000001c49361$dfcd6ff0$6a64a8c0@home> Content-Type: text/plain; charset="us-ascii" I used 24 density polystyrene foam. ++++++++++++++++++++++ Dankie Eric My first KR connection was via Peter Eich in the early 80's - he put me onto Sakkie Halgreen - I watched UKU being built, but he was already using poly-U. There was one other (KR1) flying at the old BaraG - owned by a guy called Speedy, but I never got see it under construction. The reason for my curiosity - I have been to and fro on the topic of polystyrene vs. poly-U for months now. It would suite me to use material I can get from Sagex and ship up to Zambia. I understand the downside of styrofoam in that fuel, polyester resin/ vinylester and most solvents it will dissolve it, plus it is not as easy to sand as poly-U. I am however of the opinion that over 2lbs /cub ft, Styrofoam is as good or better in shear and thus equally suitable as a composite sandwich filler. I have not seen Last-O-foam, but I gather it is a better quality poly-U? When did you build / finish your KR? Do you have any pictures posted. Did you add a layer of slurry over the foam before laying up the glass (Dynel?) I presume the 24 is kg/m3? - what is that in lbs/ft3? Groete Steve J ------------------------------ Message: 13 Date: Sun, 5 Sep 2004 10:13:52 -0700 From: "Scott & Jane" Subject: Re: KR> polystyrene To: "KRnet" Message-ID: <009401c4936b$b81b7f10$8a5c6944@scott> Content-Type: text/plain; charset="iso-8859-1" FYI: 24 kg/m3 runs out to about 1.5 Lbs/ft3 Scott... > > I presume the 24 is kg/m3? - what is that in lbs/ft3? > > Groete > Steve J > > --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.752 / Virus Database: 503 - Release Date: 9/3/2004 ------------------------------ Message: 14 Date: Sun, 5 Sep 2004 20:09:00 +0200 From: "Stephen Jacobs" Subject: RE: KR> polystyrene To: "'KRnet'" Message-ID: <000001c49373$6c3d3810$7a64a8c0@home> Content-Type: text/plain; charset="us-ascii" FYI: 24 kg/m3 runs out to about 1.5 Lbs/ft3 +++++++++++++++++ Thank you Scott - I suspect that a 1.5 Lbs/ft3 would be a relatively fragile foam. Take care Steve J ------------------------------ Message: 15 Date: Sun, 5 Sep 2004 15:01:27 -0400 From: "Orma" Subject: Re: KR> Exhaust To: "KRnet" Message-ID: <002a01c4937a$c013e900$1e29d445@ROBBINS1> Content-Type: text/plain; charset="iso-8859-1" ports are 1.5" I recently cut apart a set of type 2 engine pipes and all the runners were 1.5". I hope this helps you. Orma Southfield, MI N110LR celebrating 20 years To the gathering or bust ------------------------------ Message: 16 Date: Sun, 5 Sep 2004 15:19:24 -0400 From: VIRGIL N SALISBURY Subject: Re: KR> polystyrene To: krnet@mylist.net Message-ID: <20040905.151924.2552.0.virgnvs@juno.com> Content-Type: text/plain; charset=us-ascii Poly U that is used is 2#/'3, Virg On Sun, 5 Sep 2004 20:09:00 +0200 "Stephen Jacobs" writes: > FYI: > > 24 kg/m3 runs out to about 1.5 Lbs/ft3 > > +++++++++++++++++ > > Thank you Scott - I suspect that a 1.5 Lbs/ft3 would be a > relatively > fragile foam. > > Take care > Steve J > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > Virgil N. Salisbury - AMSOIL www.lubedealer.com/salisbury Miami ,Fl ------------------------------ Message: 17 Date: Sun, 5 Sep 2004 15:21:53 -0400 From: "Orma" Subject: KR> Getting ready to fly To: "KRnet" Message-ID: <003d01c4937d$9b129d60$1e29d445@ROBBINS1> Content-Type: text/plain; charset="iso-8859-1" Hello Net Well, it's all buttoned up and no place to go. Fog again this morning and early afternoon. As the fog lifted, the temp went up rapidly. I decided to give up for today. When I left the airport, the Temp was 83 and the humidity was not far behind. I did manage to tweak a few things and work on a few others. I emptied my fuel tank and gave it a wipe out (Yes, my hand will fit inside with the filler cap off), I added 10 gallons of fresh fuel. I removed the Revflow needle and gave it another grinding session. I removed the oil cooler and gave it a non scientific test for blockage. (I blew in the opening and compared it to another cooler). I found nothing and reinstalled it. I triple checked the valve lash. I gave the engine another full power run and found that my grinding on the needle had no ill effects. It did seem a little richer, and gained another 100 RPM. I removed the chocks and taxied up and down the hanger row, just to get a feel for the ground handling. I remembered how to hold one brake, push throttle and stick and spin on one wheel. I completed the day by signing off my annual/ condition inspection. Need I say I'm feeling some anxiety. My next trip to the airport will be to fly. Orma Southfield, MI N110LR celebrating 20 years To the gathering or bust ------------------------------ Message: 18 Date: Sun, 5 Sep 2004 14:52:55 -0500 From: "JIM VANCE" Subject: KR> KR's For Sale To: "krnet" Message-ID: <000801c49382$2a1a1340$0800a8c0@oemcomputer> Content-Type: text/plain; charset="iso-8859-1" There are two KR-1's for sale in Pratt, Kansas. Both are tri-gear. One has 90 hours TTSN, the other 230 hours TTSN. He is asking $12,000 or best offer each for them, but they have been available for several months. They are for sale because of health reasons. For information, call days 620.672.7426, or evenings 620.672.3325. Also, there is a KR-1 1/2 project in the boat stage. It is in Great Bend, Kansas. Includes a corvair engine. All proceeds for this sale will be donated to the local EAA chapter. Best offer contact Keith Benker 620.793.2280. Back to buffing the paint before I assemble my KR-2 for the final time (I hope). Jim Vance Vance@ClaflinWildcats.com ------------------------------ Message: 19 Date: Sun, 5 Sep 2004 20:02:04 -0400 (Eastern Standard Time) From: "Dan Heath" Subject: KR> Post of the week - Instrument panel wired and plumbed To: "krnet@mylist.net" Cc: Jerry Mahurin Message-ID: <413BA8FC.000003.07716@COMPUTER> Content-Type: Text/Plain; charset="iso-8859-1" http://kr-builder.org/Electrical/index.html I am going to think on it over night and it might get installed in the plane tomorrow. "There is a time for building and a time for GOING TO THE GATHERING, and the time for building has long since expired." See you in Mt. Vernon - 2004 - KR Gathering http://KRGathering.org See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC ------------------------------ Message: 20 Date: Sun, 5 Sep 2004 21:14:32 -0400 From: "Kenneth B. Jones" Subject: Re: KR> Exhaust To: "KRnet" Message-ID: <002301c493ae$de23feb0$c17ba8c0@CPQ22088114832> Content-Type: text/plain; charset="iso-8859-1" Ma I don't mind having my math corrected, but you didn't. I got the same difference, but at my age, 56% reduction is "about" 50%. :-) BTW, I cruise at 2150 rpm & rated is 2300 rpm. Also, there was no increase in static RPM with the Champ exhausts (1.5") installed. Ken ----- Original Message ----- From: "Mark Langford" To: "KRnet" Sent: Sunday, September 05, 2004 10:41 AM Subject: Re: KR> Exhaust > > I recently realized that the KR-2 that I purchased has a very > > restricted exhaust system. The engine exhaust ports are 1.5" while > > the exhaust pipes > > are 1.0". (Champs and Cubs have 1.5" exhausts.) This means that > > the exhaust area is reduced by about 50%. > > Actually, it's a lot worse than that. Remember it's radius squared > times pi, so it's really 1.77 square inches versus .78", a factor of > about 2.25x. > Pretty big difference. I don't claim to be a VW aircraft power > expert, but > I'd think 1" would be too small too, although 1.5 might be too much, > considering the rpm we're running. 1.25" might be a good guess for > the individual runners, before they meet up into a Y or something. > GPASC's catalog doesn't mention how big their pipes are. I guess the > thing to do is > see what everybody else is sucessfully running and go with that, which > is probably what you were looking for, rather than having your math corrected. > > Hope to have rudder and tailwheel permanently installed before the day > is over... > > Mark Langford, Huntsville, Alabama > N56ML "at" hiwaay.net > see KR2S project at http://home.hiwaay.net/~langford > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html ------------------------------ Message: 21 Date: Sun, 5 Sep 2004 20:27:58 -0500 From: "Mark Langford" Subject: Re: KR> Exhaust To: "KRnet" Message-ID: <004b01c493b0$bea75120$1202a8c0@basement> Content-Type: text/plain; charset="iso-8859-1" Mark Langford, Huntsville, Alabama N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford Ken wrote: > I don't mind having my math corrected, but you didn't. I got the same > difference, but at my age, 56% reduction is "about" 50%. :-) Sorry. I read it as 1.5" would be an increase of 50% over 1", but that's not what you said. You are absolutely right. I can only attribute it to paint fumes, of which the basement is full at the moment. I'm whipping a "final" coat of primer on everything that needs it. I discovered one aileron that I forgot to Smooth Prime on the bottom, and rolled some Ultimate 2K urethane primer into the pinholes. I suspect that it'll work every bit as good as Smooth Prime, for half the price, without the prohibition on wet sanding, and best of all, it's urethane. I'll let y'all know if it works tomorrow. I may just do a final weight and balance tomorrow as well... Ma Langford, Huntsville, AL N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford ------------------------------ Message: 22 Date: Sun, 5 Sep 2004 21:05:34 -0500 From: "Mark Jones" Subject: Re: KR>Mark J - KR history To: "KRnet" Message-ID: <004101c493b5$ff32cee0$6401a8c0@wi.rr.com> Content-Type: text/plain; charset="iso-8859-1" Stephen, I just returned from wiring a 40' x 60' metal building for my brother in law today. Started at 6am and finished at 8 pm. Obviously, I did no KR work today. It looks as though several folks have stepped up to answer your questions and I would like to thank them for their input. If a your question was not answered, let me know. Thanks. Mark Jones (N886MJ) Wales, WI USA E-mail me at flykr2s@wi.rr.com Visit my KR-2S CorvAIRCRAFT web site at http://mywebpage.netscape.com/n886mj/homepage.html ----- Original Message ----- From: "Stephen Jacobs" To: "'KRnet'" Sent: Sunday, September 05, 2004 8:03 AM Subject: KR>Mark J - KR history > Hi Mark > > I have had a question for some time, but was never sure who would know > the correct answer. > > I was browsing the Airventure Museum site and noted that you had > contributed to establishing the history / evolution of the KR's it > figured that you would be the best person to ask. > > The original (early) KR editorial always refers to polystyrene foam - > never mentions polyurethane. Is this correct and, if so, do you know > when plans changed to poly-U? Were some KR\s built with polystyrene > 9styro foam)? > > Take care > Steve J > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html ------------------------------ Message: 23 Date: Sun, 5 Sep 2004 22:09:02 -0500 From: "Mark Langford" Subject: Re: KR> VW duel ignition To: "KRnet" Message-ID: <006001c493be$dce7e1f0$1202a8c0@basement> Content-Type: text/plain; charset="iso-8859-1" Phillip Matheson wrote: > Am I only dreaming, or does someone know of a single distributor, twin > point, separate ignition that will fit a type 4 VW?? for the 8 spark > set up. > Instead of using a Mag. Fortunately, a Type 1 distributor will probably also fit a Type 4. Mallory used to make a dual-point distributor for the VW, and probably still does, as well as others. The dual points can be separated by merely adding an extra insulated pole (screw insulated all around with phenolic or whatever) for the second set of points. Then the two poles are connected to two separate coils, which are connected to an MSD coil switcher (I've finally memorized that the part number is 8210). The coil switcher is just two huge diodes that let either coil (or both) supply energy to the distributor cap's center tower. Since some (maybe MSD) don't recommend running them both at the time, the Corvair folks (or at least the one's that abide by William Wynne's conversion manual) hook them up to a double throw switch that supplies 12V to either one coil or the other. That gives you a redundant ignition system with the exception of the MSD switcher, plug wires, spark plugs and the coil wire. It's hard to imagine a properly secured plug wire from just quitting, spark plugs are pretty reliable these days, and the switcher would presumably croak one diode at a time. That's the way I have mine, but I have a double pole double throw (DPDT)switch that is also connected to two separate fuel pumps and two separate batteries, yielding both a redundant ignition system, and a backup fuel system. Wait a minute now...I just reread your message. Do you mean you have 8 spark plugs? If so, you got me! You'd have to find a V-8 distributor and move some stuff around inside (and maybe make it a dual-point)if you wanted a distributor cap with 8 plug wires running out of it. Somebody's probably done it. I'd be tempted to plug those extra four holes and go with four sets of plug wires and four spark plugs, fed with the previously described MSD coil switcher option. And some KR guys opt for electronic ignition on one set of plugs, and mag or distrubutor on the other. Lots of options....what else did you have in mind? Ma Langford, Huntsville, Alabama N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 346, Issue 105 *************************************** ================================== ABC Amber Outlook Converter v4.20 Trial version ==================================