This is a multi-part message in MIME format. --bound1058415451 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7bit Yep..the wing tanks have ribs in them and the lightening holes are not cut out, except for some holes to allow fuel to pass in between the ribs, or 'bays' as they're referred to. Its designed to help keep down sloshing, but there is still quite a bit of sloshing even when nearly full. There is one rib (#2 from the root) which has a trap door to allow fuel to easily flow into the first bay but not as easily to flow out, so that in an uncoordinated turn while low on fuel the pickup tube doesn't unport, which would obviously cause the engine to quit. One problem with the RV's are the float-type fuel senders are not very accurate above 1/2 full, due to the dihedral of the wing and the location of the senders being attached to the root rib. I've been thinking about putting a second sender on the other end, and using a pic to extrapolate fuel level with a table lookup based on the a/d results of sampling both senders...There are some other alternatives, such as capacitance-typ! e senders, but they are inaccurate due to different fuel densities and temperature changes... Regards, Bob Picdude wrote .. > On Wednesday 16 July 2003 17:26, Bob Japundza scribbled: > > I have been thinking about the tanks sloshing around as being noisy signal, > > and that is one of the reasons why I've been contemplating the median > > filter. Do you have a better suggestion? > > Not sure if you already have a tank in there, but if not, you can add internal > baffles, of probably use a fuel cell instead.... but check the regs on > that. > > BTW, RV6 ..... sweet! > > Cheers, > -Neil. > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics --bound1058415451--