Pietenpol-List: Chords, aero not music

matronics · Post by **matronics** » Tue Jun 03, 2003 8:21 am

Original Posted By: "rambog(at)erols.com"
Subject: Pietenpol-List: Chords, aero not musicPieters,Would someone in the know, and that's most of you, list the chords and NACA numbers of the wings of the Cub and aeronca. Would be interesting to compare the airfoils to the BHP FC10.CMC________________________________________________________________________________

matronics · Post by **matronics** » Tue Jun 03, 2003 7:48 pm

Original Posted By: Jim Malley
>Would someone in the know, and that's most of you, list the chords and NACA>numbers of the wings of the Cub and aeronca. Would be interesting to compare>the airfoils to the BHP FC10.Don't know chords offhand, but Aeroncas, depending on model were NACA 4412 or Clark Y. Piper Cubs were USA 35B. Good resource for this stuff is: http://www.aae.uiuc.edu/m-selig/ads/aircraft.html "The incomplete guide to airfoil usage". Can't find my airfoil book, anybody got the ordinates for these airfoils? Lift curve?Dan BaileyPaola, KS(Building ribs)---________________________________________________________________________________Date: Tue, 03 Jun 2003 21:39:04 -0400

matronics · Post by **matronics** » Tue Jun 03, 2003 8:53 pm

Original Posted By: "D. Engelkenjohn"

matronics · Post by **matronics** » Tue Jun 03, 2003 8:57 pm

Original Posted By: "D. Engelkenjohn"

matronics · Post by **matronics** » Tue Jun 03, 2003 9:51 pm

Original Posted By: "Jim Malley"
Jim,That is the right attitude (pun intended). False expectations are what getus into trouble. Like expecting other drivers on the road to drive sanely.The same with the Piet. Once you start thinking of the Piet being a funplane that you have to pay attention to, you start to have fun. It is rarethat you can fly hands off. On the other hand, I give her a free hand androll with whatever comes. Most of the time every action is followed by anequal and opposite reaction. Right wing lifts. A few seconds later it isusually coming back down on its own. I hardly ever touch the ailerons. Alittle rudder to bring the wing up, if it doesn't come up on its own, andlet the altitude run. The only time I jump in and take over on altitude isif I catch a thermal and start climbing through 1000'. Then I get seriousand bring her back down to 500'. Starts getting cool up that high.And watch out for those thermals you get at the end of paved runways duringthe summer. Just when you think you have a greaser you start ballooning,then dropping as you go over the runway numbers and then up you go again.But, that's what gives you a swagger as you dismount and walk among thosetricycle pilots.See you at Brodhead.Ted----- Original Message -----

matronics · Post by **matronics** » Tue Jun 03, 2003 10:28 pm

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Ted,I printed that one out and hung it on the wall. Says it all.ThanksPeter.-----Original Message-----

matronics · Post by **matronics** » Tue Jun 03, 2003 10:43 pm

Original Posted By: "D. Engelkenjohn"
Dennis,One of the few parts I bought new, it figures I paid too much! I bet they are the same thing.I would post a picture if someone can tell an ignorant redneck from Arkansashow to do it. No big words please!Ronnie----- Original Message -----

matronics · Post by **matronics** » Wed Jun 04, 2003 9:47 pm

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Chords on J-3's (and yes, they used a USA 35B airfoil) were 60". I thinkthe Aeronca was the same chord, but don't know for sure, nor do I know whatairfoil they used. I don't think it was a Clark Y because that has a flatbottom and a Champ wing has a slight undercamber.Jack -----Original Message-----

matronics · Post by **matronics** » Thu Jun 05, 2003 7:13 am

Original Posted By: "Kent Hallsten"
Dennis,What is the rating of the XH56 springs, I believe die springs are rated atthe force in pounds needed to compress the spring 1 inch, mine are rated at2400 lbs, but my gear is lower and wider than plans so I need a strongerspring.Also can anyone advise me about removing or painting over power coating? Ithink my springs are power coated and they may not match the color schemeplanned.Skip in Atlanta, just got my spokes back from Buchanan's and they lookgreat!>I called Precision Punch & Plastic Co. this afternoon and ordered a pair >of XH56 Lamina die springs for the Piet. The price was $28.77 ea plus >$3.00 S&H and whatever UPS charges to ship them to me. The XH56 are the >heavy duty ones. They should be here mid next week or so. They will ship >them tommorrow.>Dennis Engelkenjohn________________________________________________________________________________Subject: RE: Pietenpol-List: Split Axle SpringsDate: Thu, 5 Jun 2003 07:37:14 -0500

matronics · Post by **matronics** » Thu Jun 05, 2003 7:55 am

Original Posted By: "D. Engelkenjohn"
Subject: Re: Pietenpol-List: Split Axle SpringsHi Dennis: This post is probably too late since you have already spent28 bucks for the die springs, but Wag Aero sells a die spring sock kitfor around $165. It has the springs, tubing, washers etc for a turnkeyweld it your self shock kit. Leon S. Hutch, Ks.________________________________________________________________________________Date: Thu, 05 Jun 2003 08:49:24 -0500

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