Brodhead Pietenpol Association

Original Posted By: "jarheadpilot82"
=0A=0A =0A =0A=0AWhen I posted the notice yesterday about Corvair =0ACollege #21 to be held at the Barnwell Regional Airport, I got some prompt =0Areply's saying "sign me up".=0A-=0AI should have made it clear that I do not handle =0Aregistrations. William Wynne made arangements some years back with Ken Pavlou =0Awho take's care of registrations using a Paypal account. To register, go to =0A=0Ahttps://corvaircollege.wufoo.com/forms/corvair-college-21-registration/ =0A=0A-=0AI would suggest that anyone planning to be here =0Atake a look at the airport web site for detailed information. It's www.barnwellregionalairport.com =0A=0A-=0AFor many, many years, I have attended the annual =0ABrodhead Pietenpol fly in [ and the folk's there do a great job ]. I'm always =0Aasked "why don't you fly your Piet to Brodhead"? My answer is "It's a long way =0Aacross the mountains". Yes, I know that Kevin fly's in from Texas, but he's =0Ayounger and tougher. :]=0A-=0APerhaps it time to start having regional Pietenpol =0Afly in's so people-who might not be able to attend Brodhead can come see =0Atheir favorite airplanes. This would in-NO WAY-be intended to compete =0Awith Brodhead. =0A-=0AWhat better time than to start with a Pietenpol fly =0Ain at Barnwell to held in conjunction with the Corvair College. After all, some =0Aof the engines that will be built here will go on Pietenpols.=0A-=0AIf you have an interest in attending or would plan =0Ato fly in with your Piet, please let me know so I can see if we have enough =0Ainterest and can start planning. Please reply directly to barnwellairport(at)bellsouth.net-This =0Awould in no way compete with the Corvair College.=0A-=0AMy apoligies for such a long post. It will not =0Ahappen again.=0A-=0Athanks,=0A-=0AP. F. BeckThis email was scanned by VIPRE version 4.0.4194 when it was sent, using definitions version 10462________________________________________________________________________________Subject: Pietenpol-List: How To Resize Airfoils

Original Posted By: "dwilson"
There was a recent posting on the Pietenpol List by Dan Wilson asking help in resizinga Clark Y Airfoil in different sizes for his propeller project by usingcoordinates on an excel spreadsheet that he had provided. I did not respondinitially, because, frankly I did not know how to help him with Excel. I figuredthat there were plenty of computer wizards out there that could help with whathe asked. When I saw that he did not receive a prompt response, I contactedhim, and we were able to accomplish what he needed. He was so impressed withthe results of what I was able to do with a different program, he suggested thatI put it down on paper, as it might help other prop cutters or other buildersout there. So here is how I helped Dan. First, the caveat. I am not an engineer.I was a Liberal Arts major in college, and like to refer to myself as merelya computer semi-literate. I tried to learn a CAD program this past weekend,and I gave up because it made my head hurt, and I just did not understandhow to use it.I may discuss or describe some things in this attached paper that some of the computerexperts and Mac experts may completely disagree with, but all I can sayis, it worked for me. While I am no engineer or computer expert and I cant figureout a CAD program, what I am fairly proficient with is a Program that isan Apple Product, called Pages. Before I go on, Let me say this. You may notbe a Mac user, but I would bet that you know someone that is a Mac user, and youcan get them to do this work for you. So, for all of you Windows users, pleasetake a look, or at least print this out and hand it to your Mac addict.....I hope that it helps someone out there. If you still need help. please feel freeto email me, and I am happy to walk you through the method. It isn't reallyhard once you have done it a few times.--------Semper Fi,Terry HandRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/how_ ... ___Subject: Pietenpol-List: Re: How To Resize Airfoils

Original Posted By: Jim Markle
Terry, Great Job ! Your instructions were very easy to follow. Jim Markle, what do you think ? You should be able to create templates for all of your propellerstations with this method. Terry's method works perfectly, and it printsto the exact size you need for making templates. If you would like to usean airfoil other than the Clark Y for your prop all you need to do is crop apicture of it and use this method to size it for the chord length at each station.You can make as many as you want along the entire length of your prop bladeif that helped you get to down to the actual blade. I've got to get backto the carving...DanRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 13 Sep 2011 13:14:15 -0400 (GMT-04:00)

Original Posted By: KM Heide CPO/FAAOP

Original Posted By: "Richard Schreiber"
Great Question ! I was asked how did you figure out how long the chord of theairfoil was 24 inches away from the hub center. For those that are interested,Go back and look at the drawing of the airfoil plan for my propeller. Noticethat the dimension of the front face of the propeller is 4.77 inches. Thethickness of the propeller at this station is 1. 27 inches. If you draw a diagonalline from the leading edge to the trailing edge it forms a right triangle.The chord is the hypotenuse of the right triangle. Remember A squared plusB squared = C squared. In my example 4.77 squared + 1.27 squared = 24.36. The square root of 24.36 = 4.93 inches. I think this is on the spreadsheet thatI attached earlier. And there are no dumb questions. Had I not asked how tosize airfoils, I'd still be scratching my head instead of making saw dust. Ineeded a little help from the group. Thank You !Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: helspersew(at)aol.com
I have a program called Profili 2 that will plot about 1000 different airfoils.It originated in Italy. It was developed for ribs but will do exactly what youguys are talking about. I think you can download it free but it won't printor save. Basically you tell it1 airfoil and chord width at start or big end2 airfoil and chord width at small end3 tell it how many ribs or templates you want4 OK Now you can print the drawings or in my case I export them to DXF files for cuttingon my router. I am not trying to sell the product just showing what is outthere. I just went to the web site and the basic program I have is 15 Euros.I have used the program for 10 years to make rib sets models .... sailplanesand powered.--------Jerry Dotson59 Daniel Johnson RdBaker, FL 32531Started building NX510JD July, 2009now covering21" wheelsLycoming O-235Jay Anderson CloudCars propRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/a69_ ... ___Subject: Re: Pietenpol-List: Re: How To Resize Airfoils

Original Posted By: dwilson
Dan,Why did you choose the Clark Y?Dan HelsperPuryear, TN-----Original Message-----