---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Wed 11/27/13: 20 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:28 AM - Make Sure You're Listed! List of Contributors Coming Soon! (Matt Dralle) 1. 01:28 AM - Re: Original Sight Gauge Replication (Pete Lawless) 2. 01:46 AM - Re: Original Sight Gauge Replication (Jim McAvoy) 3. 01:59 AM - Re: Original Sight Gauge Replication (Max Cointe (Free)) 4. 03:01 AM - Re: Original Sight Gauge Replication (GRAHAM SINGLETON) 5. 08:00 AM - cooling duct (Alain Chabert) 6. 08:47 AM - Re: Original Sight Gauge Replication (Andrew Sarangan) 7. 09:17 AM - Re: Re: Saggy outriggers (Fred Klein) 8. 09:46 AM - Mono dolly (Mike Gamble) 9. 10:04 AM - Re: Re: Saggy outriggers (Jerry Rehn) 10. 10:21 AM - Re: Mono dolly (Fred Klein) 11. 10:31 AM - Re: Original Sight Gauge Replication (Paul McAllister) 12. 10:56 AM - Re: Mono dolly (hagargs) 13. 11:04 AM - Re: Carburettor icing Rotax 912S (John Wighton) 14. 11:30 AM - Re: Mono dolly (David Joyce) 15. 12:18 PM - Re: Original Sight Gauge Replication (Jan de Jong) 16. 04:19 PM - Re: Original Sight Gauge Replication (Andrew Sarangan) 17. 04:51 PM - Re: Original Sight Gauge Replication (Jan de Jong) 18. 07:17 PM - More Mod 78 Fun! (djaflyact) 19. 08:04 PM - Re: Original Sight Gauge Replication (Andrew Sarangan) ________________________________ Message 0 _____________________________________ Time: 12:28:48 AM PST US From: Matt Dralle Subject: Europa-List: Make Sure You're Listed! List of Contributors Coming Soon! Dear Listers, There's just a few more days left in this year's List Fund Raiser and that means the List of Contributors (LOC) is just around the corner! In December I post a list of everyone that so generously made a Contribution to support the Lists. Its my way of publicly thanking everyone that took a minute to show their appreciation for the Lists. Won't you take minute and assure that your name is on the upcoming LOC? Tell others that you appreciate the Lists. Making a Contribution to support the Lists is fast and easy using your Visa, MasterCard, or Paypal account: http://www.matronics.com/contribution Or, drop a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 I would like to thank everyone that has so generously made a Contribution thus far during this year's List Fund Raiser! Remember that its YOUR support that keeps these Lists running and improving! Don't forget to include a little comment about how the Lists have helped you! Thank you! Matt Dralle Matronics Email List Administrator ________________________________ Message 1 _____________________________________ Time: 01:28:06 AM PST US From: "Pete Lawless" Subject: RE: Europa-List: Original Sight Gauge Replication Hi Tony It would be useful to have a sight gauge that worked in the air as well. On AC I have a fuel computer and tank capacitance gauge but no sight gauge. This makes me ask the question 'What would I do if one or the other showed a sudden loss in volume?' probably assume it was an instrument problem rather than a major fuel leak? Under that circumstance a third, all be it somewhat inaccurate, indication would be invaluable. Regards Pete -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Tony Renshaw Sent: 27 November 2013 07:37 Subject: {Spam?} Europa-List: Original Sight Gauge Replication Gidday, I am interested in installing a fuel sight gauge for "PRE-flight" interpretation. I am wondering if there is any recommendation that makes the setup more effective or accurate. I'm also wondering if there is any value in having two small ball valves to be able to isolate it, both in a rollover or to simply turn it off. I am using flexible Aeroquip fuel hose, and will be using a fuel computer as my primary means of knowing my fuel state, PLUS, I have a Fuel tank capacitance gauge. Maybe with the capacitance I don't need a sight gauge at all, but I have the plumbing in my fuel tank outlet fittings, so it seems sensible to use it. Any help much appreciated. Regards Tony Renshaw Sydney Aussie This is a picture of the small valves I "could" use, and the 1/4" ID line I intend to use on a sight gauge setup. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 2 _____________________________________ Time: 01:46:50 AM PST US From: Jim McAvoy Subject: Re: Europa-List: Original Sight Gauge Replication Tony I have the original sight gauge and would not do it again After a few years I added a sight gauge behind the FOs seat that is used for re-fuelling, and it is better than the original. It's calibrated for tail down and tail up. This would serve fine for your use as a " emergency confidence" check in flight. It just links the reserve outlet to the very top of the tank, a closed circuit. Don't like the fuel in the reccomended position and the requirement for pipes all the way back to the vent. Regards Jim McAvoy > On 27 Nov 2013, at 3:36 pm, Tony Renshaw wrote: > > Gidday, > I am interested in installing a fuel sight gauge for "PRE-flight" interpretation. I am wondering if there is any recommendation that makes the setup more effective or accurate. I'm also wondering if there is any value in having two small ball valves to be able to isolate it, both in a rollover or to simply turn it off. I am using flexible Aeroquip fuel hose, and will be using a fuel computer as my primary means of knowing my fuel state, PLUS, I have a Fuel tank capacitance gauge. Maybe with the capacitance I don't need a sight gauge at all, but I have the plumbing in my fuel tank outlet fittings, so it seems sensible to use it. Any help much appreciated. > Regards > Tony Renshaw > Sydney Aussie > > This is a picture of the small valves I "could" use, and the 1/4" ID line I intend to use on a sight gauge setup. > > > ________________________________ Message 3 _____________________________________ Time: 01:59:50 AM PST US From: "Max Cointe (Free)" Subject: RE: Europa-List: Original Sight Gauge Replication Tony, I've a fuel gauge on panel but don't trust much the indication it gives so I've reinstalled the sight gauge behind the port backrest and look at it it after each flight to verify the quantity of fuel available - so to confirm my estimation. Still have in mind to install a fuel flow to replace the gauge on the panel... Max Cointe mcointe@free.fr F-PMLH Europa XS_TriGear Kit #560-2003 912ULS/AirmasterAP332 490 hours F-PLDJ DynAro MCR 4S Kit #27-2002 912ULSFR/MTProp MTV7A 1600 heures -----Message d'origine----- De: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] De la part de Jim McAvoy Envoy: mercredi 27 novembre 2013 10:46 : europa-list@matronics.com Objet: Re: Europa-List: Original Sight Gauge Replication Tony I have the original sight gauge and would not do it again After a few years I added a sight gauge behind the FOs seat that is used for re-fuelling, and it is better than the original. It's calibrated for tail down and tail up. This would serve fine for your use as a " emergency confidence" check in flight. It just links the reserve outlet to the very top of the tank, a closed circuit. Don't like the fuel in the reccomended position and the requirement for pipes all the way back to the vent. Regards Jim McAvoy > On 27 Nov 2013, at 3:36 pm, Tony Renshaw wrote: > > Gidday, > I am interested in installing a fuel sight gauge for "PRE-flight" interpretation. I am wondering if there is any recommendation that makes the setup more effective or accurate. I'm also wondering if there is any value in having two small ball valves to be able to isolate it, both in a rollover or to simply turn it off. I am using flexible Aeroquip fuel hose, and will be using a fuel computer as my primary means of knowing my fuel state, PLUS, I have a Fuel tank capacitance gauge. Maybe with the capacitance I don't need a sight gauge at all, but I have the plumbing in my fuel tank outlet fittings, so it seems sensible to use it. Any help much appreciated. > Regards > Tony Renshaw > Sydney Aussie > > This is a picture of the small valves I "could" use, and the 1/4" ID line I intend to use on a sight gauge setup. > > > ________________________________ Message 4 _____________________________________ Time: 03:01:05 AM PST US From: GRAHAM SINGLETON Subject: Re: Europa-List: Original Sight Gauge Replication Tony=0Ahave a look at this, works reliably. The large breather pipe helps f illing too, the air can get out easier=0Aunlike the standard 1/4" pipe whic h causes fuel to splutter out of the filler.=0AGraham=0A=0A=0A=0A__________ ______________________=0A From: Tony Renshaw =0A =0A =0A=0A=0AGidday,=0AI am interested in installing a fuel sight gauge for "PRE-flight" interpretation. I am wondering if there is any recommendation that makes the setup more effective or accurate. I'm also wondering if the re is any value in having two small ball valves to be able to isolate it, b oth in a rollover or to simply turn it off. I am using flexible Aeroquip fu el hose, and will be using a fuel computer as my primary means of knowing m y fuel state, PLUS, I have a Fuel tank capacitance gauge. Maybe with the ca pacitance I don't need a sight gauge at all, but I have the plumbing in my fuel tank outlet fittings, so it seems sensible to use it. -Any help much appreciated.-=0ARegards=0ATony Renshaw=0ASydney Aussie=0A=0AThis is a pi cture of the small valves I "could" use, and the 1/4" ID line I intend to u se on a sight gauge setup.- ________________________________ Message 5 _____________________________________ Time: 08:00:32 AM PST US From: Alain Chabert Subject: Europa-List: cooling duct Hello, Does anyone have plans with the quotations of elements that make up the radiator support (CD1, CD2...CD5) for Europa XS cooling duct. Regards -- *Alain CHABERT Europa F-PSLY N275* __ ________________________________ Message 6 _____________________________________ Time: 08:47:06 AM PST US From: Andrew Sarangan Subject: Re: Europa-List: Original Sight Gauge Replication Some time back there was a discussion of using a pressure transducer on the tank outlet fitting for sensing the hydrostatic pressure, which can then be calibrated for fuel volume. This is what I plan on doing. In order to work properly, the tank vent line has to be connected to the other side of the transducer so it can get the correct differential pressure. I believe Paul McAllister did something similar to this. On Wed, Nov 27, 2013 at 6:00 AM, GRAHAM SINGLETON < grahamsingleton@btinternet.com> wrote: > Tony > have a look at this, works reliably. The large breather pipe helps filling > too, the air can get out easier > unlike the standard 1/4" pipe which causes fuel to splutter out of the > filler. > Graham > > ------------------------------ > *From:* Tony Renshaw > > > Gidday, > I am interested in installing a fuel sight gauge for "PRE-flight" > interpretation. I am wondering if there is any recommendation that makes > the setup more effective or accurate. I'm also wondering if there is any > value in having two small ball valves to be able to isolate it, both in a > rollover or to simply turn it off. I am using flexible Aeroquip fuel hose, > and will be using a fuel computer as my primary means of knowing my fuel > state, PLUS, I have a Fuel tank capacitance gauge. Maybe with the > capacitance I don't need a sight gauge at all, but I have the plumbing in > my fuel tank outlet fittings, so it seems sensible to use it. Any help > much appreciated. > Regards > Tony Renshaw > Sydney Aussie > > This is a picture of the small valves I "could" use, and the 1/4" ID line > I intend to use on a sight gauge setup. > > ________________________________ Message 7 _____________________________________ Time: 09:17:11 AM PST US From: Fred Klein Subject: Re: Europa-List: Re: Saggy outriggers On Nov 26, 2013, at 8:26 PM, Martin Tuck wrote: > > Hi Fred, > > How much are you asking for the eccentric OR10s? Martin, I've been assured, now that there's a program stored in the CNC machine, that the costs for additional pieces will be nominal. I've just now emailed the guy asking for confirmation of cost and minimal quantities for additional pieces...I'll let you know just as soon as I find out. Fred PS: BTW, I often go to your YouTube video when I need a bit of inspiration to complete my build. ________________________________ Message 8 _____________________________________ Time: 09:46:18 AM PST US From: "Mike Gamble" Subject: Europa-List: Mono dolly I seem to recollect a posting showing suggestions for a dolly which would hold a mono upright whilst de-rigging and then allow movement of the a/c. I am considering moving the ship into the garage for the bad weather months this winter. This will only be possible off the trailer and minus the prop and the rudder. Simple suggestions will be most welcome. Mike Gamble XS mono G-CFMP ________________________________ Message 9 _____________________________________ Time: 10:04:34 AM PST US Subject: Re: Europa-List: Re: Saggy outriggers From: Jerry Rehn Fred I've had saggy outriggers for 13 years! Guess I need to get on your list! I can pick mine up:) Thanks Regards Jerry Sent from my iPad On Nov 27, 2013, at 10:16 AM, Fred Klein wrote: > > On Nov 26, 2013, at 8:26 PM, Martin Tuck wrote: > >> >> Hi Fred, >> >> How much are you asking for the eccentric OR10s? > > Martin, > > I've been assured, now that there's a program stored in the CNC machine, t hat the costs for additional pieces will be nominal. > > I've just now emailed the guy asking for confirmation of cost and minimal q uantities for additional pieces...I'll let you know just as soon as I find o ut. > > Fred > > PS: BTW, I often go to your YouTube video when I need a bit of inspiration to complete my build. > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= ________________________________ Message 10 ____________________________________ Time: 10:21:58 AM PST US From: Fred Klein Subject: Re: Europa-List: Mono dolly On Nov 27, 2013, at 9:45 AM, Mike Gamble wrote: > I seem to recollect a posting showing suggestions for a dolly which would hold a mono upright whilst de-rigging and then allow movement of the a/c. > Mike...Steve Hagar designed a beaut...I suspect he would send you some CAD dwgs for dimensions etc. as he did for me. Fred ________________________________ Message 11 ____________________________________ Time: 10:31:06 AM PST US Subject: Re: Europa-List: Original Sight Gauge Replication From: Paul McAllister Hello everyone, I have been using this in my aircraft since 2004. Tony K did the original design work and it is based on a PIC micro processor. It is calibrated in 1/10th increments from empty to full and displays on a 10 segment LED or an analogue display. There isn't any PCB design and most people who have built them seemed to have trouble in getting them up an running. It's not complex to build but they do require a bit of tinkering to get them working, installed and calibrated. In my case I set up a water manometer on my bench to get it debugged and working. The only issue I have had is that despite having a static vent on the differential side, the gauge does read high when climbing and low when descending and it takes a few minutes to stabilize in these scenarios. It hasn't been enough of a problem for me to bother with trying to fix it. Other than this it has functioned reliably for the last 9 years. I use this in conjunction with my fuel totalizer and I do not have a sight gauge. I do have the source code so I could burn some PIC's for people, but before doing this I will need Tony K's permission. I guess if there was enough interest I could create a PCB design and build a batch of them. I will need to think on this some more before I sign up for this. :) Regards, Paul ________________________________ Message 12 ____________________________________ Time: 10:56:26 AM PST US From: hagargs Subject: Re: Europa-List: Mono dolly Here is a video overview of the unit I made http://www.youtube.com/watch?v=BHYtCRwemiA Steve Hagar A143 Mesa AZ -----Original Message----- >From: Mike Gamble >Sent: Nov 27, 2013 10:45 AM >To: europa-list@matronics.com >Subject: Europa-List: Mono dolly > >I seem to recollect a posting showing suggestions for a dolly which would >hold a mono upright whilst de-rigging and then allow movement of the a/c. > >I am considering moving the ship into the garage for the bad weather months >this winter. This will only be possible off the trailer and minus the prop >and the rudder. > >Simple suggestions will be most welcome. > >Mike Gamble > >XS mono G-CFMP > ________________________________ Message 13 ____________________________________ Time: 11:04:11 AM PST US Subject: Europa-List: Re: Carburettor icing Rotax 912S From: "John Wighton" Jonathan, Just fit the standard heaters and enjoy your flying without worrying about icing. One of many joys in flying the Europa is that you dont have to worry about icing (or mixture or cowl flaps or how much fuel you are using, etc) so l would think it is a no brainer. Perhaps consider a full firewall fwd installation? Regards John -------- John Wighton Europa XS trigear G-IPOD Read this topic online here: http://forums.matronics.com/viewtopic.php?p=414355#414355 ________________________________ Message 14 ____________________________________ Time: 11:30:28 AM PST US From: "David Joyce" Subject: Re: Europa-List: Mono dolly Mike, I have a great dolly which was manufactured by Roger Targett, which holds my plane perfectly for rigging and being height adjustable, it also allows the U/C to be raised & lowered for work on Tyres, Brakes & wheel arch. It depends on a strong fibreglass splash moulding of the lower fuselage from the firewall back a couple of feet with a cut out for the U/C, which is lined with soft material for the fus to sit in, and it is through bolted to the fuselage to nuts bonded into the hull. The whole thing fixes into the covered trailer for transport. I will send you pictures in the next 2/7. Roger did this as a one off but it would be within the competence of many, possibly most builders to make something similar. Regards, David Joyce, G-XSDJ On Wed, 27 Nov 2013 17:45:34 -0000 "Mike Gamble" wrote: > I seem to recollect a posting showing suggestions for a >dolly which would > hold a mono upright whilst de-rigging and then allow >movement of the a/c. > > I am considering moving the ship into the garage for >the bad weather months > this winter. This will only be possible off the trailer >and minus the prop > and the rudder. > > Simple suggestions will be most welcome. > > Mike Gamble > > XS mono G-CFMP > ________________________________ Message 15 ____________________________________ Time: 12:18:11 PM PST US From: Jan de Jong Subject: Re: Europa-List: Original Sight Gauge Replication What has always puzzled me. According to the specifications of the sensor the uncertainty in the initial zero offset is +/- about 25 % of our full scale of 0.5 psi (35 cm of water). Which in the general case would require a generous bias (using an opamp) to the output of the instrumentation amplifier. Ofcourse, maybe Honeywell is way too pessimistic in its specification. Tony K must have decided so? Jan de Jong On 11/27/2013 7:30 PM, Paul McAllister wrote: > Hello everyone, > > I have been using this in my aircraft since 2004. Tony K did the > original design work and it is based on a PIC micro processor. It is > calibrated in 1/10th increments from empty to full and displays on a > 10 segment LED or an analogue display. > > There isn't any PCB design and most people who have built them seemed > to have trouble in getting them up an running. It's not complex to > build but they do require a bit of tinkering to get them working, > installed and calibrated. In my case I set up a water manometer on my > bench to get it debugged and working. > > The only issue I have had is that despite having a static vent on the > differential side, the gauge does read high when climbing and low when > descending and it takes a few minutes to stabilize in these scenarios. > It hasn't been enough of a problem for me to bother with trying to fix > it. Other than this it has functioned reliably for the last 9 years. > > I use this in conjunction with my fuel totalizer and I do not have a > sight gauge. > > I do have the source code so I could burn some PIC's for people, but > before doing this I will need Tony K's permission. I guess if there > was enough interest I could create a PCB design and build a batch of > them. I will need to think on this some more before I sign up for > this. :) > > Regards, Paul > ________________________________ Message 16 ____________________________________ Time: 04:19:33 PM PST US From: Andrew Sarangan Subject: Re: Europa-List: Original Sight Gauge Replication I don't remember which chip TonyK used originally, but there are MEMS based membrane pressure sensors out there with 0.5 psi full scale (or even smaller scales). I plan to do this with a Atmel controller, and when I get around to it, I will post it here for everyone's benefit. Here is one: http://www.mouser.com/ProductDetail/Silicon-Microstructures-Inc/SM5852-003-G-3-NR/?qs=sGAEpiMZZMvhQj7WZhFIAE1JN4kSCAy2w%2fQb30WxsAg%3d On Wed, Nov 27, 2013 at 3:17 PM, Jan de Jong wrote: > > > What has always puzzled me. > According to the specifications of the sensor the uncertainty in the initial > zero offset is +/- about 25 % of our full scale of 0.5 psi (35 cm of water). > Which in the general case would require a generous bias (using an opamp) to > the output of the instrumentation amplifier. Ofcourse, maybe Honeywell is > way too pessimistic in its specification. Tony K must have decided so? > > Jan de Jong > > > On 11/27/2013 7:30 PM, Paul McAllister wrote: >> >> Hello everyone, >> >> I have been using this in my aircraft since 2004. Tony K did the original >> design work and it is based on a PIC micro processor. It is calibrated in >> 1/10th increments from empty to full and displays on a 10 segment LED or an >> analogue display. >> >> There isn't any PCB design and most people who have built them seemed to >> have trouble in getting them up an running. It's not complex to build but >> they do require a bit of tinkering to get them working, installed and >> calibrated. In my case I set up a water manometer on my bench to get it >> debugged and working. >> >> The only issue I have had is that despite having a static vent on the >> differential side, the gauge does read high when climbing and low when >> descending and it takes a few minutes to stabilize in these scenarios. It >> hasn't been enough of a problem for me to bother with trying to fix it. >> Other than this it has functioned reliably for the last 9 years. >> >> I use this in conjunction with my fuel totalizer and I do not have a sight >> gauge. >> >> I do have the source code so I could burn some PIC's for people, but >> before doing this I will need Tony K's permission. I guess if there was >> enough interest I could create a PCB design and build a batch of them. I >> will need to think on this some more before I sign up for this. :) >> >> Regards, Paul >> > > ________________________________ Message 17 ____________________________________ Time: 04:51:44 PM PST US From: Jan de Jong Subject: Re: Europa-List: Original Sight Gauge Replication Tony K used the original large version of 26PC01??? , now available as 26PC01SMT at both Mouser and Digikey. Two important properties: - temperature compensation for the range 0 to 50 degrees C - fuel compatible (fluorosilicone seal I believe) On 11/28/2013 1:18 AM, Andrew Sarangan wrote: > > I don't remember which chip TonyK used originally, but there are MEMS > based membrane pressure sensors out there with 0.5 psi full scale (or > even smaller scales). I plan to do this with a Atmel controller, and > when I get around to it, I will post it here for everyone's benefit. > > Here is one: http://www.mouser.com/ProductDetail/Silicon-Microstructures-Inc/SM5852-003-G-3-NR/?qs=sGAEpiMZZMvhQj7WZhFIAE1JN4kSCAy2w%2fQb30WxsAg%3d > > > On Wed, Nov 27, 2013 at 3:17 PM, Jan de Jong wrote: >> >> >> What has always puzzled me. >> According to the specifications of the sensor the uncertainty in the initial >> zero offset is +/- about 25 % of our full scale of 0.5 psi (35 cm of water). >> Which in the general case would require a generous bias (using an opamp) to >> the output of the instrumentation amplifier. Ofcourse, maybe Honeywell is >> way too pessimistic in its specification. Tony K must have decided so? >> >> Jan de Jong >> >> >> On 11/27/2013 7:30 PM, Paul McAllister wrote: >>> Hello everyone, >>> >>> I have been using this in my aircraft since 2004. Tony K did the original >>> design work and it is based on a PIC micro processor. It is calibrated in >>> 1/10th increments from empty to full and displays on a 10 segment LED or an >>> analogue display. >>> >>> There isn't any PCB design and most people who have built them seemed to >>> have trouble in getting them up an running. It's not complex to build but >>> they do require a bit of tinkering to get them working, installed and >>> calibrated. In my case I set up a water manometer on my bench to get it >>> debugged and working. >>> >>> The only issue I have had is that despite having a static vent on the >>> differential side, the gauge does read high when climbing and low when >>> descending and it takes a few minutes to stabilize in these scenarios. It >>> hasn't been enough of a problem for me to bother with trying to fix it. >>> Other than this it has functioned reliably for the last 9 years. >>> >>> I use this in conjunction with my fuel totalizer and I do not have a sight >>> gauge. >>> >>> I do have the source code so I could burn some PIC's for people, but >>> before doing this I will need Tony K's permission. I guess if there was >>> enough interest I could create a PCB design and build a batch of them. I >>> will need to think on this some more before I sign up for this. :) >>> >>> Regards, Paul >>> >> >> >> >> > > ________________________________ Message 18 ____________________________________ Time: 07:17:07 PM PST US Subject: Europa-List: More Mod 78 Fun! From: "djaflyact" Today, I have determined that the next wing to go into the fuselage will not work. I made a board the right thickness and did a trial run. It looked like it it wasn't going to fit and the board verified. The problem is the aileron control arm bolts (CS08). It looks like it might clear the CS08 arm, but not the bolt heads. There are some possibilities to address this new problem. Replace the AN bolts with counter sunk screws. That might not be enough and the CS08 bracket might be too close to the spar. How about bending (adjusting) the CS08 bracket? The starboard CS08 has plenty of clearance and could be bent forward to allow more clearance of the cross link with the fuel tank. The port S08 could be bent toward the rear to allow more clearance to the new spar. It has plenty of clearance with the fuel tank. Anybody know if the CS08 arms can be removed? That would make modifying them easier. Any ideas for tweaking them in place? As Rozanna Rozanna Danna used to say - "If its not one thing, its something else!" Thanks, Dave A227 Mini U2 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=414373#414373 ________________________________ Message 19 ____________________________________ Time: 08:04:31 PM PST US From: Andrew Sarangan Subject: Re: Europa-List: Original Sight Gauge Replication A simpler approach would be to directly connect one of these differential sensors to a programmable panel meter, like this one: http://www.jameco.com/Jameco/workshop/ProductNews/panelmeters.html Then you wouldn't have to build any circuits or boards. On Wed, Nov 27, 2013 at 7:51 PM, Jan de Jong wrote: > > Tony K used the original large version of 26PC01??? , now available as > 26PC01SMT at both Mouser and Digikey. > Two important properties: > - temperature compensation for the range 0 to 50 degrees C > - fuel compatible (fluorosilicone seal I believe) > > On 11/28/2013 1:18 AM, Andrew Sarangan wrote: >> >> >> >> I don't remember which chip TonyK used originally, but there are MEMS >> based membrane pressure sensors out there with 0.5 psi full scale (or >> even smaller scales). I plan to do this with a Atmel controller, and >> when I get around to it, I will post it here for everyone's benefit. >> >> Here is one: >> http://www.mouser.com/ProductDetail/Silicon-Microstructures-Inc/SM5852-003-G-3-NR/?qs=sGAEpiMZZMvhQj7WZhFIAE1JN4kSCAy2w%2fQb30WxsAg%3d >> >> >> On Wed, Nov 27, 2013 at 3:17 PM, Jan de Jong >> wrote: >>> >>> >>> >>> What has always puzzled me. >>> According to the specifications of the sensor the uncertainty in the >>> initial >>> zero offset is +/- about 25 % of our full scale of 0.5 psi (35 cm of >>> water). >>> Which in the general case would require a generous bias (using an opamp) >>> to >>> the output of the instrumentation amplifier. Ofcourse, maybe Honeywell is >>> way too pessimistic in its specification. Tony K must have decided so? >>> >>> Jan de Jong >>> >>> >>> On 11/27/2013 7:30 PM, Paul McAllister wrote: >>>> >>>> Hello everyone, >>>> >>>> I have been using this in my aircraft since 2004. Tony K did the >>>> original >>>> design work and it is based on a PIC micro processor. It is calibrated >>>> in >>>> 1/10th increments from empty to full and displays on a 10 segment LED or >>>> an >>>> analogue display. >>>> >>>> There isn't any PCB design and most people who have built them seemed to >>>> have trouble in getting them up an running. It's not complex to build >>>> but >>>> they do require a bit of tinkering to get them working, installed and >>>> calibrated. In my case I set up a water manometer on my bench to get it >>>> debugged and working. >>>> >>>> The only issue I have had is that despite having a static vent on the >>>> differential side, the gauge does read high when climbing and low when >>>> descending and it takes a few minutes to stabilize in these scenarios. >>>> It >>>> hasn't been enough of a problem for me to bother with trying to fix it. >>>> Other than this it has functioned reliably for the last 9 years. >>>> >>>> I use this in conjunction with my fuel totalizer and I do not have a >>>> sight >>>> gauge. >>>> >>>> I do have the source code so I could burn some PIC's for people, but >>>> before doing this I will need Tony K's permission. I guess if there was >>>> enough interest I could create a PCB design and build a batch of them. >>>> I >>>> will need to think on this some more before I sign up for this. :) >>>> >>>> Regards, Paul >>>> >>> >>> >>> >>> >> >> >> >> > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.