Brodhead Pietenpol Association

Original Posted By: "coxwelljon"
Barry at that low of a power setting(1900 to 2050 RPM) you can lean your engineuntil it starts getting rough and push the mixture back in just far enough tosmooth it up and really help with that problem. You can't hurt an engine at thatlow power. Just have to remember before landing to go back full rich in caseof needing a go round. I spotted fish in a 150 Super Cub at just enough powerto keep it airborne for hours at a time. It would gunk up like that if youdidn't lean the heck out of it.--------Jerry Dotson59 Daniel Johnson RdBaker, FL 32531Started building NX510JD July, 2009wing, tailfeathers done, fuselage rollingusing Lycoming O-235Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Corvair College #20

Original Posted By: Jeff Wilson
This is a little late but I thought I would post anyway for those Corvair guysor those considering the Corvair engine. Early in the month I loaded my engineparts and drove some 650 miles to Corvair College #20 in hopes that I couldassemble and run my engine. This was wishful thinking but the experience of attendingwas well worth it. I am reconverting an engine that came with a projectand it was supposed to be ready to fly and actually had been run for 5 hrsstatic. I got wind of some things that had not been done so I decided to disassemblemy engine and make some changes. I also saw the location of CorvairCollege #20 and decided it was happening about as close as I would find to mylocation, at least for the foreseeable future.My engine did not have a nitrided crank or forged pistons which was the main reasonfor me deciding to disassemble it. I want to add a pitch here. I foundthe name of Advanced Heat Treat Corp. on Mark Langford's website as a place thatdoes nitriding. This is not the firm that William Wynn recommends but I decidedto use them as they are a company with some 30 years of experience in thetreatment of metals. They also had a competitive price. I sent them my crankshaftand picked it up at one of their facilities on my way to the CC#20. I cannot say enough good things about the way I was treated. They went out oftheir way to accomodate my situation and I was only getting one crank done bya facility that is set up to do production work for manufacturing. I even gota handwritten thank you for my business after I returned home. They would certainlybe my choice again for magnafluxing and nitriding.Now some about the College. There were about 60 people there and I would say thatthere were 20 engines in various stages from disassembly to final running.I think 12 to 15 engines ran on the test stand. There were also flying examplesof corvair powered aircraft there to look at and talk with the builders.The following are some of my thoughts. 1. The college did not include "lecture" sessions with handouts or diagrams butwas very much a hands on workshop. That said I was glad I had my engine partsthere to work on and I was not just an onlooker. One can get a lot out ofwatching, but the real value for me was actually working with the tools and gettinga feel for what I was doing.2. You will see a lot of different solution to the same problems so the opportunityto circulate around and talk to other builders is invaluable. One may havemade up their mind on a particular part to buy or not to buy and the giveand take with other builders is a big advantage.3. There were 3 experts there and their time obviously got divided up among thevarious projects. At times is was necessary to be a little forward to get theirattention, but doing so resulted in how to sessions that benefited the wholegroup. If you attend and see a group gathered go see what is going on. Itlikely will be something you will also need to do or have done.4. There was a real sense of sharing of tools, parts, and expertise. My tablemate was continually into my tool box and I was borrowing special tools fromother tables. When I needed to start a particular phase the guy from the tablenext to me was there to show me the process as he had already done his. Partsthat I had were used on other engines to get them on the test stand, and mytable mate borrowed a whole starter assembly from another engine to get his onthe test stand.5. Some lasting friendship were created. I received 2 emails as soon as I gothome from people I met inquiring about my return trip and with promised information.I got there the day before everything started and 5 of us who did notknow each other went out to dinner together to get acquainted.6. Food was good and no one went away hungry. 7. I enjoyed getting to know William Wynne, and Roy Szarafinski of Roy's Garageonon a more personal level which gave me a greater appreciation for their knowledgeand mechanical skills. I now see them as being far more approachablefor questions.Many people there had attended previous colleges, this was my first. If you areassembling a corvair engine or plan to consider one for your project then attendingat least one Corvair College should be on your list.If anyone has particular question about my experience at this College, email meand I will be happy to respond.--------Jon Coxwell GN-1 BuilderRecycle and preserve the planetRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "jarheadpilot82"
I believe that was in response to scimitar props in general. A true scimitar prop does a lot of flexing and were used mainly on racers back in the day. Modern scimitars are a semi- scimitars and more lasting. But I'm not sure if they are more lasting than say your standard Sensenich.I have an email from cloud cars explaining this and I'll look it up and post it later today.Jeff WilsonN899WTSt. Louis, MOSent from my iPhoneOn Jun 22, 2011, at 8:28 AM, Michael Perez wrote:> I seem to remember a post a while back about these props having a "short life span". I don't remember any details other then the person was looking into buying a new prop and said one draw back tothe Cloudcarse props was a short life span. Anyone have details on this?> > Michael Perez> Karetaker Aero> www.karetakeraero.com> > > ============================================================================================================================================> ________________________________________________________________________________Subject: Pietenpol-List: Re: Cloudcars Prop Performance

Original Posted By: "jarheadpilot82"
Could someone explain to me the definition of "rather short life span"? Comingback into airplane flying that involves a propeller (it has been over 20 yearssince I consistently flew an aircraft with a propeller, and that one was metal),I have no real frame of reference. This discussion of the Scimitar prop hasgot me to thinkin' (a dangerous thing, to be sure).With a wooden prop, what are the indications that you are approaching the end ofthe prop's life span? I can imagine that there are preflight indications. Doindicators manifest themselves in flight? I certainly would hate to find outwhat it looks like AFTER the prop has exceeded its life span! What about metalor composite props? Does anyone fly composite or metal props on a Pietenpol?Thanks in advance for the information.--------Semper Fi,TerryRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair College #20

Original Posted By: "Dortch, Steven D MAJ NG NG FORSCOM"
Jon,Thanks for the really in depth description. Would it be advisable for someone without a Corvair to attend and just watch? Isan extra set of hands welcome if all I wanted to do was help someone with theirproject and learn a little at the same time?Thanks again.--------Semper Fi,TerryRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "coxwelljon"
It's a 108-3=2C with an 6A4-165-B3 Franklin in it.Go to http://tinyurl.com/3hx847qA short=2C but instructional=2C video concerning planning your takeoff.Oscar ZunigaAir Camper NX41CC "Scout"Flying Squirrel N2069Z "Rocket"Medford=2C OR (soon to be Eagle Point=2C Oregon)website at http://www.flysquirrel.net ________________________________________________________________________________Subject: Pietenpol-List: Re: Corvair College #20

Original Posted By: "Greg Cardinal"
There were 60 people in attendance and only 20 engines. Many were only lookers.If you wanted to team up with someone I am sure your help would be welcomed.Get there early and look for someone who is disassembling an engine or haslots of parts. They will be the ones that need the most help. Just ask if youcan help for the experience. If you could do that I think the experience wouldbe more beneficial. I am a hands on person and I retain more if I can actuallydo some work.One thing I failed to mention was that discussion of politics and religion wereoff limits. I thought that was a real breath of fresh air.--------Jon Coxwell GN-1 BuilderRecycle and preserve the planetRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "dgaldrich"
Greg,According to the BPA website, fuel (100LL and ethanol-free Auto fuel) will be available.http://pietenpols.org/id12.htmlBill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair College #20

Original Posted By: "jarheadpilot82"
The dearth of discussion about politics and religion is one of the endearing thingsabout this board too.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair College #20

Original Posted By: "Greg Cardinal"
Thanks, again, Jon for all of the insight.--------Semper Fi,TerryRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "coxwelljon"
COOL-JIM----- Original Message -----