---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Wed 05/26/10: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:08 AM - Re: Re: capacitive fuel probes (Richard Martin) 2. 06:48 AM - Re: Re: capacitive fuel probes (Jerry Grimmonpre) 3. 09:53 AM - Re: Re: capacitive fuel probes (Brian Huffaker) 4. 10:50 AM - Re: Re: capacitive fuel probes (Terry Watson) 5. 11:25 AM - Re: Re: capacitive fuel probes (Larry Bowen) 6. 04:39 PM - Re: Re: capacitive fuel probes (Dan Bergeron) ________________________________ Message 1 _____________________________________ Time: 06:08:56 AM PST US Subject: Re: RV8-List: Re: capacitive fuel probes From: Richard Martin Listers, I now have 1900 hours on my capacitance fuel level senders with ultra accurate results. I did not use the rod type sensors. When I built the tanks, I built them with flat plate sensors inside of the fuel tanks. I realize this method should be done during the construction phase of the tanks. Dick Martin RV8 N233M the fast one On Mon, May 24, 2010 at 12:30 PM, wrote: > > Tom, > If you have the Princeton probes, save yourself a LOT of grief and remove > them now and toss them in the trash. Replace them with floats. You'll be > much less grumpy. > I calibrated mine seven times. They still are not accurate - not even > close. > Stan Sutterfield > > > >All I have to do to be ready for my DAR inspection is to calibrate my > capacitive > fuel probes. > > >-- > >Tom Sargent > > > Hi Tom, > > Which capacitive fuel probes do you have? I have the Princeton units that > GRT > sells and haven't been able to even come close to getting them calibrated. > Actually, > they went through the calibration fine (5 set points), but the readings > are completely erroneous. Sometimes they read full when the tanks are 1/2 > empty. > Sometimes they read empty when the tanks are full. Sometimes they read, > well, whatever; usually not the actual amount of fuel. They are completely > useless. I've talked with Princeton, and they've offered no suggestions. > > I'm not sure what to do at this point. Replacing the senders will likely > require > removing the tanks which is no small job on the -7 and -8. Ack, this > sucks. > I sure wish I'd just used the S&W float senders from Van's now. > > > Matt Dralle > > * > > * > > ________________________________ Message 2 _____________________________________ Time: 06:48:08 AM PST US From: "Jerry Grimmonpre" Subject: Re: RV8-List: Re: capacitive fuel probes Dick, Your flat plate sensors sound very interesting ... would you please sketch-out what you did and scan it to the RV8 list? Jerry ----- Original Message ----- From: Richard Martin To: rv8-list@matronics.com Sent: Wednesday, May 26, 2010 8:07 AM Subject: Re: RV8-List: Re: capacitive fuel probes Listers, I now have 1900 hours on my capacitance fuel level senders with ultra accurate results. I did not use the rod type sensors. When I built the tanks, I built them with flat plate sensors inside of the fuel tanks. I realize this method should be done during the construction phase of the tanks. Dick Martin RV8 N233M the fast one ________________________________ Message 3 _____________________________________ Time: 09:53:47 AM PST US From: Brian Huffaker Subject: Re: RV8-List: Re: capacitive fuel probes On Wed, 26 May 2010, Jerry Grimmonpre wrote: > Dick, > Your flat plate sensors sound very interesting ... would you please > sketch-out what you did and scan it to the RV8 list? > Jerry I'm not flying yet, but have installed the flat plate sensors ordered from here: http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1274891104-316-30&browse=ei&product=ei-fuelgauge Brian Huffaker, DSWL (bifft@xmission.com) RV-8A 80091 1/4 Starduster II N23UT flying ________________________________ Message 4 _____________________________________ Time: 10:50:54 AM PST US From: "Terry Watson" Subject: RE: RV8-List: Re: capacitive fuel probes I hope Dick will respond. I installed the flat plate sensors from Vans in my stalled RV-8A project and have been wondering about how I can convert the electrical information from the sensors to drive a fuel gauge or electronic engine monitor. Terry Seattle From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of Jerry Grimmonpre Sent: Wednesday, May 26, 2010 6:29 AM Subject: Re: RV8-List: Re: capacitive fuel probes Dick, Your flat plate sensors sound very interesting ... would you please sketch-out what you did and scan it to the RV8 list? Jerry ----- Original Message ----- From: Richard Martin Sent: Wednesday, May 26, 2010 8:07 AM Subject: Re: RV8-List: Re: capacitive fuel probes Listers, =EF=BD I now have 1900 hours on my capacitance fuel level senders with ultra accurate results.=EF=BD I did not use the rod type sensors.=EF=BD When I built the tanks, I built them with flat plate sensors inside of the fuel tanks.=EF=BD I realize this method should be done during the construction phase of the tanks. Dick Martin RV8 N233M the fast one ________________________________ Message 5 _____________________________________ Time: 11:25:23 AM PST US Subject: Re: RV8-List: Re: capacitive fuel probes From: Larry Bowen I had the flat cap. plates from Van's in my RV-8 and they worked fine with the EI fuel gauge. You need a converter between each tank and the gauge, also from Vans. * * *Capacitive frequency converter (one per tank required)* Part Number = IE P-300C Price = $45.00 I have the float gauges in the current project because it's a quick-build. -- Larry Bowen Larry@BowenAero.com http://BowenAero.com On Wed, May 26, 2010 at 1:50 PM, Terry Watson wrote: > I hope Dick will respond. I installed the flat plate sensors from Vans i n > my stalled RV-8A project and have been wondering about how I can convert the > electrical information from the sensors to drive a fuel gauge or electron ic > engine monitor. > > > Terry > > Seattle > > > *From:* owner-rv8-list-server@matronics.com [mailto: > owner-rv8-list-server@matronics.com] *On Behalf Of *Jerry Grimmonpre > *Sent:* Wednesday, May 26, 2010 6:29 AM > *To:* rv8-list@matronics.com > *Subject:* Re: RV8-List: Re: capacitive fuel probes > > > Dick, > > Your flat plate sensors sound very interesting ... would you > please sketch-out what you did and scan it to the RV8 list? > > Jerry > > ----- Original Message ----- > > *From:* Richard Martin > > *To:* rv8-list@matronics.com > > *Sent:* Wednesday, May 26, 2010 8:07 AM > > *Subject:* Re: RV8-List: Re: capacitive fuel probes > > > Listers, > > =EF=BD > > I now have 1900 hours on my capacitance fuel level senders with ultra > accurate results.=EF=BD I did not use the rod type sensors.=EF=BD W hen I built the > tanks, I built them with flat plate sensors inside of the fuel tanks.=EF =BD I > realize this method should be done during the construction phase of the > tanks. > > Dick Martin > > RV8 N233M > > the fast one > > * * > > * * > > ** > > ** > > ** > > ** > > ** > > ** > > *http://www.matronics.com/Navigator?RV8-List* > > ** > > ** > > ** > > *http://forums.matronics.com* > > ** > > ** > > ** > > ** > > *http://www.matronics.com/contribution* > > ** > > * * > > * > =========== =========== =========== =========== > * > > ________________________________ Message 6 _____________________________________ Time: 04:39:31 PM PST US Subject: Re: RV8-List: Re: capacitive fuel probes From: Dan Bergeron Hi: This email is intended for Richard Martin, RV-8, N233M I'm one of those who is having problems with insanely inaccurate fuel level readings on my GRT screen fuel gauges. I installed the flat plate, capacitive sensors in the fuel tanks of my RV-7A at the time of construction. Of course they measure capacitance, which the GRT EIS unit cannot read. A set of Princeton converter units change capacitance to voltage (0 to 4 volts as I recall) and feeds those values to the EIS box. I'm not very technical but I understand that much. In this latest exchange of emails on this subject I learned for the first time that there are in fact two types of capacitive sending units: the flat plate version (which I installed) and the rod version (a new one on me). Now I'm wondering if the converter units which I installed are compatible with the flate plate sending units. Neither Todd nor Sandy at GRT have eve r mentioned anything about two different types of sending units; and, you'd certainly think they'd read the same capacitive value for a given fuel level. And of course the converter boxes couldn't care less about flat plate or rod type sending units; they just convert farads to volts. I do know that there are two types of converter units; one has five set points and one has two (that's the one I have.) Maybe I've got the wrong converters. Am I on to something here or is it just wishful thinking driven by frustration? What's your take on this? Maybe yet another call to GRT is i n order. Dan Bergeron RV-7A - N307TB 146 hours since first flight on 8/4/09 On Wed, May 26, 2010 at 2:16 PM, Larry Bowen wrote: > I had the flat cap. plates from Van's in my RV-8 and they worked fine wit h > the EI fuel gauge. You need a converter between each tank and the gauge, > also from Vans. > * > * > *Capacitive frequency converter (one per tank required)* > Part Number = IE P-300C > Price = $45.00 > > I have the float gauges in the current project because it's a quick-build .. > > -- > Larry Bowen > Larry@BowenAero.com > http://BowenAero.com > > > On Wed, May 26, 2010 at 1:50 PM, Terry Watson wrote: > >> I hope Dick will respond. I installed the flat plate sensors from Vans >> in my stalled RV-8A project and have been wondering about how I can conv ert >> the electrical information from the sensors to drive a fuel gauge or >> electronic engine monitor. >> >> >> >> Terry >> >> Seattle >> >> >> >> >> >> *From:* owner-rv8-list-server@matronics.com [mailto: >> owner-rv8-list-server@matronics.com] *On Behalf Of *Jerry Grimmonpre >> *Sent:* Wednesday, May 26, 2010 6:29 AM >> *To:* rv8-list@matronics.com >> *Subject:* Re: RV8-List: Re: capacitive fuel probes >> >> >> >> Dick, >> >> Your flat plate sensors sound very interesting ... would you >> please sketch-out what you did and scan it to the RV8 list? >> >> Jerry >> >> ----- Original Message ----- >> >> *From:* Richard Martin >> >> *To:* rv8-list@matronics.com >> >> *Sent:* Wednesday, May 26, 2010 8:07 AM >> >> *Subject:* Re: RV8-List: Re: capacitive fuel probes >> >> >> >> Listers, >> >> =EF=BD >> >> I now have 1900 hours on my capacitance fuel level senders with ultra >> accurate results.=EF=BD I did not use the rod type sensors.=EF=BD When I built the >> tanks, I built them with flat plate sensors inside of the fuel tanks.=EF =BD I >> realize this method should be done during the construction phase of the >> tanks. >> >> Dick Martin >> >> RV8 N233M >> >> the fast one >> >> * * >> >> * * >> >> ** >> >> ** >> >> ** >> >> ** >> >> ** >> >> ** >> >> *http://www.matronics.com/Navigator?RV8-List* >> >> ** >> >> ** >> >> ** >> >> *http://forums.matronics.com* >> >> ** >> >> ** >> >> ** >> >> ** >> >> *http://www.matronics.com/contribution* >> >> ** >> >> * * >> >> *et="_blank">http://www.matronics.com/Navigator?RV8-List >> tp://forums.matronics.com >> _blank">http://www.matronics.com/contribution >> * >> >> =========== =========== =========== =========== > * > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-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/rv8-list Browse Digests http://www.matronics.com/digest/rv8-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.