---------------------------------------------------------- Zenith601-List Digest Archive --- Total Messages Posted Thu 05/22/08: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:20 AM - Angle for Useable Fuel and Flow Check (DaveG601XL) 2. 07:32 AM - Re: Angle for Useable Fuel and Flow Check (Jim Hoak) 3. 08:20 AM - Re: Angle for Useable Fuel and Flow Check (T. Graziano) ________________________________ Message 1 _____________________________________ Time: 07:20:02 AM PST US Subject: Zenith601-List: Angle for Useable Fuel and Flow Check From: "DaveG601XL" I am to the point in my final assembly where I would like to demonstrate the useable fuel quantity and fuel flow checks. Per the FAA guidelines, they suggest "5 degrees above the highest anticipated climb angle." I e-mailed ZAC for their suggested angle at which to perform this test. I got back a disappointing catch-22 like non-answer. They said the highest angle I am likely to see is the power on stall angle. "Which you will have to find in your flight testing." That was the entire answer, not even a suggestion considering that I cannot do one before the other. Thanks for nothing. Does anybody who is flying an XL with a Jabiru 3300 have any insight on an appropriate angle to use for this test? At least until I can fly and determine my own results. Thanks, -------- David Gallagher 601 XL, working on final assembly. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=184356#184356 ________________________________ Message 2 _____________________________________ Time: 07:32:33 AM PST US From: "Jim Hoak" Subject: Re: Zenith601-List: Angle for Useable Fuel and Flow Check David, I don't have an exact angle to suggest for the fuel system flow check, but I do highly recommend you do it. Let's hope a XL owner can give you a real number. As a EAA Tech Counselor I urge every builder I work with to do this check. It can be a life saver. My guess is to get the nose up to about 25 degrees. I suggest actually running the engine at take-off power ( not just a fuel flow check into a container ) for at least a minute or two with minimum fuel in the tanks with the selector in each position. Just be carefull how you do this. Don't want anyone to get hurt. Jim Hoak - 601 HD ----- Original Message ----- From: "DaveG601XL" Sent: Thursday, May 22, 2008 9:19 AM Subject: Zenith601-List: Angle for Useable Fuel and Flow Check > > > I am to the point in my final assembly where I would like to demonstrate > the useable fuel quantity and fuel flow checks. Per the FAA guidelines, > they suggest "5 degrees above the highest anticipated climb angle." I > e-mailed ZAC for their suggested angle at which to perform this test. I > got back a disappointing catch-22 like non-answer. They said the highest > angle I am likely to see is the power on stall angle. "Which you will have > to find in your flight testing." That was the entire answer, not even a > suggestion considering that I cannot do one before the other. Thanks for > nothing. > > Does anybody who is flying an XL with a Jabiru 3300 have any insight on an > appropriate angle to use for this test? At least until I can fly and > determine my own results. > > Thanks, > > -------- > David Gallagher > 601 XL, working on final assembly. > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=184356#184356 > > > ________________________________ Message 3 _____________________________________ Time: 08:20:38 AM PST US From: "T. Graziano" Subject: Zenith601-List: Re: Angle for Useable Fuel and Flow Check Dave, If you hold the tail on the ground, it should be suffice, in my opinion. I believe any difference between this and a higher angle would be minimal. I have never heard of any problems with the XL/Jab fuel system design. With the Jab 3300 you have a very high nose attitude at full power at stall - in fact on my XL/Jab I can never get it to break before my CHTs go to redline; the airplane just hangs in a stall shudder and I keep the wings level with rudder. Also, I have run my tanks dry during Phase I testing to see what would happen and to check restart of the Jab. On my XL the engine just suddenly quits, and the engine windmills. Restarts are a non event. I hit the boost pump, change tanks to one with fuel, and within a few seconds the engine is again purring. I believe you will really enjoy flying the XL/Jab. Watch your CHTs. Tony Graziano XL/Jab N493TG; 378 hrs ----- Original Message ----- From: "DaveG601XL" Sent: Thursday, May 22, 2008 9:19 AM Subject: Zenith601-List: Angle for Useable Fuel and Flow Check > > > I am to the point in my final assembly where I would like to demonstrate > the useable fuel quantity and fuel flow checks. Per the FAA guidelines, > they suggest "5 degrees above the highest anticipated climb angle." I > e-mailed ZAC for their suggested angle at which to perform this test. I > got back a disappointing catch-22 like non-answer. They said the highest > angle I am likely to see is the power on stall angle. "Which you will have > to find in your flight testing." That was the entire answer, not even a > suggestion considering that I cannot do one before the other. Thanks for > nothing. > > Does anybody who is flying an XL with a Jabiru 3300 have any insight on an > appropriate angle to use for this test? At least until I can fly and > determine my own results. > > Thanks, > > -------- > David Gallagher > 601 XL, working on final assembly. > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=184356#184356 > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith601-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith601-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/zenith601-list Browse Digests http://www.matronics.com/digest/zenith601-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.