---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Mon 02/21/05: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:19 AM - Weldable flange (fiberglass fuel tank) (Pilots4ETW@wmconnect.com) 2. 09:48 AM - Plans ordering trouble (Dan Loegering) 3. 09:55 AM - Airfoils (Isablcorky@aol.com) 4. 10:18 AM - Re: Airfoils (DJ Vegh) 5. 03:25 PM - Re: Plans ordering trouble (Ben Charvet) 6. 05:15 PM - Re: Airfoils (Rcaprd@aol.com) 7. 05:46 PM - Re: Weldable flange (fiberglass fuel tank) (Rcaprd@aol.com) ________________________________ Message 1 _____________________________________ Time: 06:19:38 AM PST US From: Pilots4ETW@wmconnect.com Subject: Pietenpol-List: Weldable flange (fiberglass fuel tank) I'm getting close to building my fuel tanks out of fiberglass. In looking at the book, Sportplane Construction Techniques by Tony Bingelis (page 83) I see the flange but don't have any idea which flange size to order for my specific needs. Both AS&S and Wicks show flanges using 1/8", 1/4", 3/8", 1/2", 3/4" female pipe thread in which to insert the finger strainer. I'm guessing a 3/8" would be OK for a Contienetal A-65 or a Corvair engine's thirst? Or should I go with 1/2"? Thanks, Roy ________________________________ Message 2 _____________________________________ Time: 09:48:12 AM PST US Subject: Pietenpol-List: Plans ordering trouble From: "Dan Loegering" --> Pietenpol-List message posted by: "Dan Loegering" Hi all, Have finally decided to take the plunge and order plans (wife said OK) and am running into difficulty trying to make this happen. Is the information on the Pietenpol web site still accurate? I attempted to email Don and Andrew with the addresses listed and they bounced back undeliverable. Any thoughts on how I can obtain a set of plans so I can start construction? Dan Loegering Fargo ND ________________________________ Message 3 _____________________________________ Time: 09:55:16 AM PST US From: Isablcorky@aol.com Subject: Pietenpol-List: Airfoils Pieters, Anyone know whether the GN is the same airfoil as the B H Pietenpol? Corky ________________________________ Message 4 _____________________________________ Time: 10:18:14 AM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: Airfoils it is with the exception of the radius of the leading edge. the GN1 has a larger radius for a more blunt leading edge. Other than that it's the same. also the spars are placed on 31" centers on the GN1. DJ ----- Original Message ----- From: Isablcorky@aol.com To: pietenpol-list@matronics.com Sent: Monday, February 21, 2005 10:54 AM Subject: Pietenpol-List: Airfoils Pieters, Anyone know whether the GN is the same airfoil as the B H Pietenpol? Corky ________________________________ Message 5 _____________________________________ Time: 03:25:00 PM PST US From: "Ben Charvet" Subject: Re: Pietenpol-List: Plans ordering trouble --> Pietenpol-List message posted by: "Ben Charvet" I ordered my plans in November and used the Paypal option for payment. They were delivered within 2 weeks and even included a letter from Don Pietenpol suggesting that I make at least one part every day. I never received any e-mails from them though. Ben Charvet Just getting started too ________________________________ Message 6 _____________________________________ Time: 05:15:20 PM PST US From: Rcaprd@aol.com Subject: Re: Pietenpol-List: Airfoils --> Pietenpol-List message posted by: Rcaprd@aol.com In a message dated 2/21/05 12:18:52 PM Central Standard Time, djv@imagedv.com writes: << it is with the exception of the radius of the leading edge. the GN1 has a larger radius for a more blunt leading edge. Other than that it's the same. also the spars are placed on 31" centers on the GN1. DJ >> DJ is correct about the leading edge, and although I've never seen the GN1 and the Pietenpol 'FC 10' overlaid on each other, I'd be willing to bet there are other small differences. I do understand that a larger radius on the leading edge helps keep the wing flying at a higher 'Critical Angle of Attack' (AOA when the wing begins to stall). Have you ever noticed how large the radius is on aerobatic planes? It's Huge !! It allows them to fly at a higher angle of attack, and use the enormous amount of thrust to maintain altitude, when they are behind the power curve. The official name for behind the power curve is the 'Region of Reversed Command'. The drawback to a larger radius leading edge is in cruise flight, where drag is increased significantly...that's why the aerobatic planes don't make a very efficient cross country plane. Nothing is for Free in aircraft design !! Chuck G. Hey...I've been reading a book by Berry Schiff called '1001 Things You Though You Knew About Aviation'. Why was it decided in the 18th Century that the territorial limit of the United States (and other countries) should extend three miles beyond shore ? This was the maximum range of a shore based cannon. ________________________________ Message 7 _____________________________________ Time: 05:46:13 PM PST US From: Rcaprd@aol.com Subject: Re: Pietenpol-List: Weldable flange (fiberglass fuel tank) --> Pietenpol-List message posted by: Rcaprd@aol.com In a message dated 2/21/05 8:20:19 AM Central Standard Time, Pilots4ETW@wmconnect.com writes: << I'm getting close to building my fuel tanks out of fiberglass. In looking at the book, Sportplane Construction Techniques by Tony Bingelis (page 83) I see the flange but don't have any idea which flange size to order for my specific needs. Both AS&S and Wicks show flanges using 1/8", 1/4", 3/8", 1/2", 3/4" female pipe thread in which to insert the finger strainer. I'm guessing a 3/8" would be OK for a Contienetal A-65 or a Corvair engine's thirst? Or should I go with 1/2"? Thanks, Roy >> Roy, I believe 3/8" is the chosen pipe thread for the small Continentals. That is what I used, however I did some rework to the finger strainer. The only finger strainer I could find had 3/8" male pipe threads, and reduced to 1/4" female threads, with a hex to tighten the finger strainer into the weldable fitting. I was afraid 1/4" is too small, and would restrict fuel flow. I reworked the finger strainer by using a die to cut the male threads of the finger strainer down to the point where it would go in the female threads of the weldable fitting enough to allow an AN822 ELBOW with 3/8" male pipe thread on one end, to go into the weldable fitting, and 3/8" Flair fitting on the other end of the elbow. I left the hex on the finger strainer till I got the threads cut down enough, then cut the hex off, and used a square easy out to install and seat the finger strainer down in the weldable fitting, then installed the elbow on top of it. I ruined the first finger strainer, by cutting too much threads off, and it just threaded right through the weldable fitting. I now have 3/8" plumbing all the way from the tank, through the gascolator, to the carb. Oh yeah, before glassing it in, I also cut the ridge down around the radius of the weldable fitting, so the fiberglass layers would lay right up around it. Chuck G. the word 'Aileron' is derived from a French word referring to a 'Small Wing'. (sheesh.......I feel like Cliff Claven from Cheers !! )