---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Wed 07/11/12: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:23 AM - Re: testing static system (Ralph E. Capen) 2. 04:41 AM - Re: testing static system (Fred Stucklen) 3. 05:52 AM - Re: testing static system (Kevin Horton) 4. 05:59 AM - Re: testing static system (Kelly McMullen) 5. 06:08 AM - Re: testing static system (Ralph E. Capen) 6. 06:33 AM - Re: testing static system (Bob Collins) 7. 08:55 AM - Re: testing static system (D Paul Deits) 8. 11:22 AM - Engraving clarification (Steve T) 9. 03:31 PM - Glitch that affected some customers (Steve T) ________________________________ Message 1 _____________________________________ Time: 04:23:21 AM PST US From: "Ralph E. Capen" Subject: Re: RV-List: testing static system I put a test fitting in mine that I connect one of those JC Whitney brake bleeder vacuum gizmos to. I tape over both static fittings.... -----Original Message----- From: thomas sargent Sent: Jul 11, 2012 2:10 AM Subject: RV-List: testing static system I've read a lot about static system tests, but how do you do it exactly? I assume I tape up one static port and then attach ... what to the other one? How do I temporarily bond a vinyl tube to a static port with no leaks? RTV? -- Tom Sargent, RV-6A ________________________________ Message 2 _____________________________________ Time: 04:41:10 AM PST US From: "Fred Stucklen" Subject: Re: RV-List: testing static system Tom, The best way to test the static system is by using a small automotive hand vacuum pump (like the ones used to test carburetors). Sears used to carry these as well as most of the auto parts stores. The vacuum pump comes with a variety of fittings, including a suction cup that can be put directly over the static port. Tape the opposite side static port off first, then apply a suction (not over 1000' indicated on the altimeter) to the other side. The static system should be able to hold the altitude within 100' for over a minute. One of the problems you might run into is suction leakage from around the static port - between the static port and the skin. I had to apply a silicone seal on the inside of the skin to avoid this issue. All other leaks can usually be found around other fittings within the static system. When I can't get a leak-free system, I find that breaking the static line such that I isolate the rear of the aircraft from the front area, it's easier to isolate the problem to specific areas. Fred Stucklen RV-7A N924RV 740 Hrs Flying RV-6A N926RV 875 Hrs sold RV-6A N925RV 2008 Hrs Sold Time: 11:11:58 PM PST US Subject: testing static system From: thomas sargent I've read a lot about static system tests, but how do you do it exactly? I assume I tape up one static port and then attach ... what to the other one? How do I temporarily bond a vinyl tube to a static port with no leaks? RTV? -- Tom Sargent, RV-6A ________________________________ Message 3 _____________________________________ Time: 05:52:58 AM PST US Subject: Re: RV-List: testing static system From: Kevin Horton How do you verify that your test fitting doesn't leak when it is not in use? Kevin Horton On 2012-07-11, at 07:22 , Ralph E. Capen wrote: > > I put a test fitting in mine that I connect one of those JC Whitney brake bleeder vacuum gizmos to. > > I tape over both static fittings.... > > -----Original Message----- > From: thomas sargent > Sent: Jul 11, 2012 2:10 AM > To: rv-list > Subject: RV-List: testing static system > > I've read a lot about static system tests, but how do you do it exactly? I assume I tape up one static port and then attach ... what to the other one? How do I temporarily bond a vinyl tube to a static port with no leaks? RTV? > ________________________________ Message 4 _____________________________________ Time: 05:59:03 AM PST US From: Kelly McMullen Subject: Re: RV-List: testing static system Keep several things in mind. You do not want to pull more than 1000 ft on your altimeter. Lowering the pressure on the static side without similar reduction to the pitot puts a pressure on the airspeed indicator. Also, other than ensuring you have a leak free system, you cannot certify the static system. You will need to have the system certified if you want to fly anywhere an encoder is required, like Class B or controlled airspace above 10,000 ft. It takes a shop with a repair station license to certify your transponder, encoder and static system. Doubly so if you want to fly IFR. One of those few items you can't do for yourself on a homebuilt. On 7/11/2012 4:40 AM, Fred Stucklen wrote: > > Tom, > > The best way to test the static system is by using a small automotive > hand vacuum pump (like the ones used to test carburetors). Sears used > to carry these as well as most of the auto parts stores. The vacuum > pump comes with a variety of fittings, including a suction cup that > can be put directly over the static port. Tape the opposite side > static port off first, then apply a suction (not over 1000 indicated > on the altimeter) to the other side. The static system should be able > to hold the altitude within 100 for over a minute. > > One of the problems you might run into is suction leakage from around > the static port between the static port and the skin. I had to apply > a silicone seal on the inside of the skin to avoid this issue. > > All other leaks can usually be found around other fittings within the > static system. When I cant get a leak-free system, I find that > breaking the static line such that I isolate the rear of the aircraft > from the front area, its easier to isolate the problem to specific areas. > > ----- No virus found in this message. Checked by AVG - www.avg.com ________________________________ Message 5 _____________________________________ Time: 06:08:50 AM PST US From: "Ralph E. Capen" Subject: Re: RV-List: testing static system When I get the official check, they don't use the test port - as they have their own procedure...I didn't know that when I put the test port in. -----Original Message----- >From: Kevin Horton >Sent: Jul 11, 2012 8:51 AM >To: rv-list@matronics.com >Subject: Re: RV-List: testing static system > > >How do you verify that your test fitting doesn't leak when it is not in use? > >Kevin Horton > >On 2012-07-11, at 07:22 , Ralph E. Capen wrote: > >> >> I put a test fitting in mine that I connect one of those JC Whitney brake bleeder vacuum gizmos to. >> >> I tape over both static fittings.... >> >> -----Original Message----- >> From: thomas sargent >> Sent: Jul 11, 2012 2:10 AM >> To: rv-list >> Subject: RV-List: testing static system >> >> I've read a lot about static system tests, but how do you do it exactly? I assume I tape up one static port and then attach ... what to the other one? How do I temporarily bond a vinyl tube to a static port with no leaks? RTV? >> > > ________________________________ Message 6 _____________________________________ Time: 06:33:13 AM PST US From: "Bob Collins" Subject: RE: RV-List: testing static system I didn't do anything fancy. I went to Fleet Farm (a farm supply store) and got a plastic syringe (the package said "veterinary use only," and when the kid at the counter said "what's this going to be used for," I said...."ummm.... Errrrr.... It's for my dog.... And my cat (I had two sizes because I didn't know what size to use)... They wouldn't take their pills so I've got some liquid medication. I felt like a meth dealer). I also bought some "medical tubing" (which made me look like a heroin addict) and attached it to the syringe and used safety wire to secure it. I attached the other end to a piece of the rigid plastic tubing I used in the pitot/static system (SafeAir system). I also secured that connection with safety wire, and removed a line from a junction and installed the tubing in its place. Do not connect it directly to an instrument. Image here: http://tinyurl.com/6tjx48v I taped over the static ports -- use electrical tape because duct tape will not work... Too pourous. I similarly plugged the pitot tube and applied a SMALL vacuum to 1,000 feet and watched the instruments. I reinstalled the line I replaced and then disconnected another location and repeated the process to check all instruments. I had a leak and -- as many others have found -- it was at a fitting at one of the instruments. The other "leak" was a poor job of plugging the pitot tube. Both were adjusted and rechecked. Zero change in "altitude." I used 23.1325 as my guide: (i) Unpressurized airplanes. Evacuate the static pressure system to a pressure differential of approximately 1 inch of mercury or to a reading on the altimeter, 1,000 feet above the aircraft elevation at the time of the test. Without additional pumping for a period of 1 minute, the loss of indicated altitude must not exceed 100 feet on the altimeter. Cost: About $10 and a bad reputation at Fleet Farm. There's another method -- a manometer -- which you can learn about here: http://www.iflyez.com/manometer.shtml Do not archive ________________________________ Message 7 _____________________________________ Time: 08:55:07 AM PST US From: "D Paul Deits" Subject: RE: RV-List: testing static system Please unsubscribe for now. Thank you very much -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Bob Collins Sent: Wednesday, July 11, 2012 6:33 AM Subject: RE: RV-List: testing static system I didn't do anything fancy. I went to Fleet Farm (a farm supply store) and got a plastic syringe (the package said "veterinary use only," and when the kid at the counter said "what's this going to be used for," I said...."ummm.... Errrrr.... It's for my dog.... And my cat (I had two sizes because I didn't know what size to use)... They wouldn't take their pills so I've got some liquid medication. I felt like a meth dealer). I also bought some "medical tubing" (which made me look like a heroin addict) and attached it to the syringe and used safety wire to secure it. I attached the other end to a piece of the rigid plastic tubing I used in the pitot/static system (SafeAir system). I also secured that connection with safety wire, and removed a line from a junction and installed the tubing in its place. Do not connect it directly to an instrument. Image here: http://tinyurl.com/6tjx48v I taped over the static ports -- use electrical tape because duct tape will not work... Too pourous. I similarly plugged the pitot tube and applied a SMALL vacuum to 1,000 feet and watched the instruments. I reinstalled the line I replaced and then disconnected another location and repeated the process to check all instruments. I had a leak and -- as many others have found -- it was at a fitting at one of the instruments. The other "leak" was a poor job of plugging the pitot tube. Both were adjusted and rechecked. Zero change in "altitude." I used 23.1325 as my guide: (i) Unpressurized airplanes. Evacuate the static pressure system to a pressure differential of approximately 1 inch of mercury or to a reading on the altimeter, 1,000 feet above the aircraft elevation at the time of the test. Without additional pumping for a period of 1 minute, the loss of indicated altitude must not exceed 100 feet on the altimeter. Cost: About $10 and a bad reputation at Fleet Farm. There's another method -- a manometer -- which you can learn about here: http://www.iflyez.com/manometer.shtml Do not archive ________________________________ Message 8 _____________________________________ Time: 11:22:10 AM PST US Subject: RV-List: Engraving clarification From: Steve T I have received many inquiries and I just wanted to clarify that the Usher c aps we engrave are the standard caps that Vans uses on all their models. In addition, we can do Andair caps and also the Newton deluxe caps that vans s ells. If there are any other types, we are happy to accommodate you. It may add a few days to the turnaround as we will need to make a custom Holder but will do this at no additional cost to our customers. Have a great afternoon. Hope to meet some of you at Oshkosh! Steve Www.aircraftspecialty.com Www.kitplanemods.com Www.kitplanehoses.com Sent from my iPhone Sent from my iPhone ________________________________ Message 9 _____________________________________ Time: 03:31:13 PM PST US Subject: RV-List: Glitch that affected some customers From: Steve T To those of you who placed orders for fuel cap engraving, thank you! For those that tried and experienced a technical glitch, the problem has been resolved and ordering is again available. Have a great day Steve :) Sent from my iPhone ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.