Brodhead Pietenpol Association

Original Posted By: Mark Roberts
Subject: Pietenpol-List: Poplar (Yellow) and a corvair engine

Original Posted By: Ameet Savant
Mark, you didn't say anything about a car, so I'm assuming this motor/ trans is just sitting out in the open. As you suspect, the fact that the carbs are only plugged with rags and the motor will not turn would suggest that water has run down through carbs, into the heads, and through the open valves into the cylinders. In addition to having pistons frozen in their bores it is highly likely that some (if not all) of the combustion chambers on the heads will be pitted, rendering them useless to you for an aircraft conversion.If the guy wants to just get it gone, it could be worth offering $25 or $50. It's possible the case, cam, or crank could be usable cores, and it can't hurt to have more of the misc small parts. You could also use a junk case later on down the line as a mockup if need be. Having said all that, I recall you saying earlier that you had not bought William's manual yet; I would put the $50 towards his conversion manual instead of this engine. I think the manual would be more useful to you at this point than a questionable core. Have a good day,RyanSent from my iPhoneOn Jun 26, 2009, at 1:15 AM, Mark Roberts wrote:> >>> I'm reading the EAA wood book tonight after returning from looking at> a Corvair Engine that was a heart breaker. Drove about 2 hours away> from my home to look at this motor to see what I could see. Along the> way I called Pat Panzera (a bona fide really nice guy by the way) and> he talked me through what to look for, and after I found the numbers> where he told me to look, I thought I might have found my engine for> about 100 bucks. I got to the guys bone yard, looked up the head> numbers and Eureka! The heads were 110 HP pure gold! Scraped off the> dirt from the case block and whatdoyaknow! The case is 110 HP too!> Grab a wrench, put the transmission into neutral and turn,,, and try> that again,,,, no luck. The motor would not rotate. A little close> look and the plug wires were not connected to plugs. The carb holes> were stuffed with rags, and I have a sneaking suspicion the pistons> are rusted to the cylinder walls. After the exam I called Pat back> and found out it was probably a bust in that the motor was most likely> worthless. Bummer. I may still try to get it and make a deal with the> guy that I'll pay him if I can use any of it. He said it's not worth> much to him sitting out in the rain >> Now a poplar question: I looked at the page from AC43.13 that Gary> Boothe sent me that lists Poplar (Yellow) as a potential substitute> wood. I see a number of you are building with Poplar, and just wanted> to check on the weight difference. I see it is slightly less strong> than Sitka, but how much heavier is it over all? Since the plane is a> bit over built (design wise) I think poplar sounds like a better> choice than fir for the majority of the build.>> (My apologies to John if you mentioned the difference today on the> phone and I have just forgotten... It's happening too often lately> )>> Mark________________________________________________________________________________Date: Fri, 26 Jun 2009 04:56:30 -0700 (PDT)

Original Posted By: Ryan Mueller
http://www.wfaa.com/sharedcontent/dws/w ... 9d3b.htmlA friend of my dads manages this airport and told us about this. We didn't getthe owner's name though.Jeremy in dallasSent via BlackBerry from T-Mobile________________________________________________________________________________Date: Fri, 26 Jun 2009 08:48:55 -0500Subject: Re: Pietenpol-List: GN1 crash at Midway in TX

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Mark,Dittos to what Ryan said. Just finding a usable crank might be verybeneficial down the road. Some guys find a good engine, just to learn thattheir crank is cracked or bent. There are other parts worth while, too. Suchas the head covers, baffles, etc. My core came without both of those items.Good luck to you...and try to put a little more enthusiasm into yourproject!Gary BootheCool, Ca.PietenpolWW Corvair ConversionTail done, Fuselage on gear(13 ribs down.)-----Original Message-----

Original Posted By: Mark Roberts
Funny. That project is located about five miles from my inlaws and a little over a half hour from Brodhead. He should truck up there and try to sell it. But not at that price.John HofmannVice-President, Information TechnologyThe Rees Group, Inc.2810 Crossroads Drive, Ste 3800Madison, WI 53718Phone: 608.443.2468 ext 150Fax: 608.443.2474Email: jhofmann(at)reesgroupinc.comOn Jun 26, 2009, at 9:53 AM, Michael Perez wrote:> For those who may be interested:>> http://cgi.ebay.com/ebaymotors/Pietenpo ... ______Date: Fri, 26 Jun 2009 09:22:29 -0700Subject: Re: Pietenpol-List: Poplar (Yellow) and a corvair engine

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Mark,I can make fun of your enthusiasm, because, after 15 months of building, Iam more obsessed than ever. I go to sleep every night, and wake up everymorning, thinking about my Piet! As far as I'm concerned, building aPietenpol is "What I do." Work is something that occasionally interrupts(don't tell my boss!).If you decide to use poplar, you will have to purchase your longerons,uprights and diagonals from a lumber store. At Home Depot, you will findplenty of usable 1x2's or 1x4's to rib up into rib material. Building ribsalone will keep you busy for a couple months. Gary BootheCool, Ca.PietenpolWW Corvair ConversionTail done, Fuselage on gear(13 ribs down)-----Original Message-----

Original Posted By: "TOM STINEMETZE"

Original Posted By:> mark.rbrts1(at)gmail.com
I got a corvair motor like this - it didn't turn over. I got it home for free=2C stating I'd pay if I could use anything. I started pulling parts and when I pulled the distributor I found the problem. The distributor gear was chewed up. Once it was out=2C problem solved. I couldn't find the cause of it - I tore down the rest of the engine and found no problems - of course the gear on the crank was equally chewed. Anyway=2C I call the guy back to tell him about it and he says=2C just keep it=2C don't worry about any money.Might be worth a shot.Tom B.> Date: Thu=2C 25 Jun 2009 23:15:45 -0700> Subject: Pietenpol-List: Poplar (Yellow) and a corvair engine

Original Posted By: Mark Roberts
Subject: Re: Pietenpol-List: Poplar (Yellow) and a corvair engine

Original Posted By:> ameetsavant(at)yahoo.com
Form a boatbuilders perspective poplar is not used that often because it tends to absorb water and rot. If it is used I think diligence with varnishing and drainage is extra important.Steve in a very damp Maine. > Date: Fri=2C 26 Jun 2009 04:56:30 -0700

Original Posted By: Mark Roberts
I bought a wonderful 70% project which includes the original "Jenny" type landing gear. Rather than rip out the work in place I'm going to go ahead and stick with that gear. Question. The solid steel axel appears to weigh about a ton and a half. My thought is to substitute a steel tube or failing that, replace the center half of the solid steel axel with an aluminum tube, sleeved over the axel end pieces. What say the assembled, and far more experienced, masses?Also, beyond asthetics, what are the considerations on windshield design? I'm leaning towards the simpler single piece, bent plastice motorcycle type althoough the classic framed type has more "Classic" appeal. Is the simpler lighter? What say you?Thanks in advanceSteve WaltonClassic wood, short fuselagebasic stucture complete, just need to cover80% to go : )________________________________________________________________________________Date: Sat, 27 Jun 2009 09:50:41 -0700Subject: Re: Pietenpol-List: Poplar (Yellow) and a corvair engine

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Steve,My axle is 1-1/2" diameter, .188" wall 4130, heat treated to 160,000 psitensile strength. The loading of the axle is a bit unusual - if you look ata shear and moment diagram for such a structure, the axle is under aconstant bending moment from bungee to bungee, which means the stress isconstant all along the axle. Landing loads can put some pretty highstresses on it (I broke my first axle during a forced landing, hence theheat treating of the new axle).As for windshield design, the curved design is considerably lighter andinfinitely easier to make than the framed type.It all depends on what you want. If you want good performance, build a Pietwith standard "Cub-type" gear, curved windshields, etc. If you want the"classic" look, go with the sraight axle, wire wheels (with or withoutcovers) and framed windshields, but understand that all those things addweight and hamper performance, particularly on hot days.Good luck!Jack PhillipsNX899JP _____

Original Posted By: Jim

Original Posted By: Jeff Boatright

Original Posted By:>> mark.rbrts1(at)gmail.com
>> Subject: Pietenpol-List: Poplar (Yellow) and a corvair engine

Original Posted By:> > ameetsavant(at)yahoo.com