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Pietenpol-List: Mag timing/ impulse on both mags
Posted: Fri Aug 20, 2010 8:43 am
by matronics
Original Posted By: helspersew(at)aol.com
Kudos to Aircraft Spruce and Specialty for being responsive enough to ourneeds to: (a.) even hear our group grumblings and (b.) to respond quickly tosuch. No they're not perfect, but I've pretty much built my plane from theircatalog and have always appreciated the things they've done right which havefar outnumbered the mistakes. DouwePs. Hey Dan, Gene is bang on about your mag timing. (no surprise right?)________________________________________________________________________________Subject: Pietenpol-List: Mag timing/ impulse on both magsDate: Fri, 20 Aug 2010 10:02:32 -0400
Posted: Fri Aug 20, 2010 9:06 am
by matronics
Original Posted By: Michael Perez
Pietenpol-List: Re: Mag timing/ impulse on both mags
Posted: Fri Aug 20, 2010 11:59 am
by matronics
Original Posted By: "Jerry Dotson"
That is right Bill... one of the Ohio Piet guys had an old typed list that hasobviously floated around for years, but I can't remember the name. I was toldthat his list was used to create the AS&S bill of materials for the originalPietenpol wood package, minus any capstrip or ply. I'm not sure if that is alltrue, but I did use that list to inventory the parts I received from AS&S andit was right on, with the exception of two extra 3/16" strips for the empennage.Much of the hand written and photo copied notes were difficult to read, so I retypedthem a few months ago and posted them here for others to use. I've foundthe list useful when trying to determine what lengths to use for which assemblies...I figured others would too. Getting to the point... at the bottom of his page he had a note stating...65HP or less - 1/4" x 1/4" capstrip65HP or more - 1/4" x 1/2" capstripPerhaps that is where it came from? I agree that 1/4" x 1/2" should be used as per the original plans. Bill Church wrote:> Just did a quick check, and the Aircraft Spruce website NOW has the contentsof each wood kit listed (it didn't a few days ago, as was noted by Mark).> I haven't checked ALL of the details (and I don't think I will, since I alreadyhave all my spruce), but I did notice one thing that is wrong. The wing kitlists 500 ft of 1/4" x 1/4" capstrip. The plans do not call for 1/4" x 1/4" anywhere.The capstrip size should be 1/4" x 1/2". > I recall seeing a materials list that someone had posted a while back, that hada small note at the bottom, regarding capstrip size relating to engine horsepower,but the plans DO NOT have any reference to that - who knows where thatcame from.> Just seems logical that a wood kit should be based on the actual plans, and noton some modification that some, unknown person came up with.> >
http://www.aircraftspruce.com/builderki ... N=01-00582> > Bill C.--------Mark ChouinardFinishing up Wings - Working on Center SectionRead this topic online here:
http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Mag timing/ impulse on both mags
Posted: Fri Aug 20, 2010 12:28 pm
by matronics
Original Posted By: Gene Rambo
Dan I am with you on both mags having impulse couplings. It will definitely start better. The only problem I have ever seen an impulse coupling give isback when I first started flying the oils were not as good as now. They would gumup...get sticky and not engage sometime. Washed up and work good as new.--------Jerry Dotson59 Daniel Johnson RdBaker, FL 32531Started building NX510JD July, 2009Ribs and tailfeathers doneusing Lycoming O-235Read this topic online here:
http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Mag timing/ impulse on both mags
Posted: Fri Aug 20, 2010 1:07 pm
by matronics
Original Posted By: helspersew(at)aol.com
Dan=2C I was not suggesting you HAVE to remove one=2C just that another is not necessary. Most modern engines only have one. Many more old continentals and such had none at all. Radials=2C except Kinners (probably something else=2C but I can't think of one) dont have impulses. I think the Model A would start just fine with no impulse=2C but if you want one that is fine. I just think two is overkill and may be somehow contributing to your problem.GeneSubject: Pietenpol-List: Mag timing/ impulse on both magsDate: Fri=2C 20 Aug 2010 10:02:32 -0400