---------------------------------------------------------- Zenith640-List Digest Archive --- Total Messages Posted Thu 02/24/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:18 AM - Re: Fuel Tanks (Scott Stewart) 2. 01:45 PM - Year of the Zenith (Joe) 3. 01:51 PM - Re: Fuel Tanks (pilot4pay) ________________________________ Message 1 _____________________________________ Time: 11:18:57 AM PST US Subject: Zenith640-List: Re: Fuel Tanks From: "Scott Stewart" Hi Mark, I discarded the 12 degree call-out and recalculated the numbers. The fuel line needs to run slightly "uphill" from the tank outlet to the fuel selector, and this run should be as straight as practical to minimize pressure loss (minimize the force required by the fuel pump). Factoring the wing dihedral angle and the total distance the line needs to run, I calculated a 10 degree slope through the front ribs. Depending on how you want to route the fuel line, this value may change for you, so I recommend doing your own calculations. -------- Scott Stewart s/n: 0092 Building from plans Rudder and Stabilator complete. Wings at 85%. Fuselage at 70%. Construction on hold while I help a friend build his RV-9A. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=332027#332027 ________________________________ Message 2 _____________________________________ Time: 01:45:59 PM PST US From: "Joe" Subject: Zenith640-List: Year of the Zenith Hi Everyone, Here is what we have so far for the "Year of the Zenith" for Oshkosh 2011. Let's get a conversation going and find out where you would like to go from here. AIRCRAFT PARKING Tom Poberezny is putting together a parking place for 50 Zenith airplanes at Oshkosh 2011. I have asked specifically for the spot on the north side of the homebuilt parking area. That way we are a short distance from the Zenith sales area. Now, it's time to see how many of you would like to park your planes together at EAA. The first time I posted this, I had about 15 E-mail commitments! Here is what I would like you to do. If you plan to bring your Zenith to Oshkosh, please send this information to me by E-mail at backstagelive@gmail.com. I will keep your E-mail address and send you updates as time goes by. Name / Address / Phone / Do you have a cell phone for Oshkosh - give us that number. E-mail address N-number Number of people in your group Would you consider flying your plane in the Homebuilt Showcase this year? If you are not planning to bring your plane to Oshkosh, but you still would like to participate in Zenith activities and want to keep updates, send me an E-mail to backstagelive@gmail.com. AEROSHELL PRESENTATION Tom has mentioned that he would like to do a presentation in Aero Shell Square with Chris, and have one of each of his designs available for a photo session. So far we have 2 outstanding airplanes that have committed. Ken Couillard from Oshkosh would let us use his CH 300 Tri Z, and Al Beyer would like to use his 601 HDS. If you would like to have your airplane in the picture, please contact Sebastian at Zenith. We will need every model Zenith except for the ones listed above. LODGING If you are looking for lodging for this years convention, and you are a Zenith builder or enthusiast, the University of Oshkosh Gruenhagen Hall will reserve one entire floor (40 rooms). There is already a waiting list for these rooms. There is a time limit on this offer. THIS OFFER EXPIRES MONDAY, MARCH 7TH! The cost is $55 per night. Max 2 to a room. After March 7th, the rooms go back to the pool of people on the reservation list. If we can get these reservations in soon, we can have the entire floor to ourselves! Transportation is available to and from the University to the EAA on a very regular basis. If you would like to stay at Gruenhagen Hall, please call me at 920-237-1450. I have an application form I can E-mail you. When calling, please leave me your name, phone number, and how many will be in the room. AIRCRAFT REVIEW DURING SHOW Tom mentioned that it would be fun to have a Zenith Aircraft Review before one of the air shows. This would be a lot of fun, very good for Zenith sales, and very easy to set up. Please let me know if you would like to fly your plane in the review. OTHER STUFF! If we have a full 50 airplane commitment, which I am almost certain we will, should we look into memorabilia like hats and T shirts that have "Year of the Zenith" or something like that printed on them? Should the factory sponsor an award for best homebuilt Zenith on the field? If you do, Zenith can give the award in the Theatre in the Woods during the last day of the convention along with the regular EAA awards. It would be fun to have the Chris Heintz workmanship award given every year at EAA on a Zenith product! What are your thoughts? Should the people that fly their Zenith airplanes to Oshkosh get a plaque or cup? This would be a great thing to give out and we could find an aviation parts vender that would support this financially. Do you know of any Aircraft type business that would fund such a project? Thanks everyone! Your input and comments will be greatly appreciated. This will be a great year at EAA for Zenith builders. Please let me know if you are coming as soon as possible. Joe Scheibinger 2809 Scenic Drive Oshkosh, WI 54904 920-237-1450 backstagelive@gmail.com ________________________________ Message 3 _____________________________________ Time: 01:51:42 PM PST US Subject: Zenith640-List: Re: Fuel Tanks From: "pilot4pay" What I know about fuel injected systems. I'm going with an auto conversion and fuel injection also. My understanding is that each tank must have provision for a return line, and that the fuel selector valve should be a ganged unit, so that supply and return are paired to the tank in use. Bad things happen when this is not followed. I looked into my old T182T POH and examined the fuel system cartoon, and indeed there are fuel return lines in the drawing. The details will end up being specific to your engine choice but I believe that locating the return port as high on the tank as practical is the correct way to do this. The reason for a high port is you won't ever be pushing against the weight of the fuel in the tank as part of the pumping "head". I have some cartoons from my rotary engine group with various configurations of systems. Another method would be to have a header tank located near the engine, that would require one pump for filling the header, and another to pump from the header tank to engine, with fuel return line to header tank only. There are also marine type ganged fuel selector valves that are hundreds of dollars cheaper than the aviation valves, but their brass bodies are heavier. I will take the small weight penalty, to save hundreds of dollars. The only problem I have yet to fully solve are my need to have exact fuel consumption data, and the return line system makes this somewhat more complicated. There are certified flow meters that have a subtractive side, but they are an arm and a leg. So that point is still unsettled. There are several ways to skin that cat, still thinking. If you want more info on fuel systems I can forward you a whole bunch of e-mails worth of discussion, don't forget to search the other Zenith lists too. Hope this helps. -------- Craig Smith CH640 builder SN: 0078 "Just think how stupid the average person is, and then realize that half of them are even stupider!" --George Carlin Read this topic online here: http://forums.matronics.com/viewtopic.php?p=332036#332036 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith640-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith640-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith640-list Browse Digests http://www.matronics.com/digest/zenith640-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.