---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 09/17/14: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:05 AM - Re: AvMAP Ultra EFIS (Etienne Verhellen) 2. 03:20 AM - Re: AvMAP Ultra EFIS (Etienne Verhellen) 3. 11:21 AM - Re: Re: Reverse Rotation On Shutdown (Bitterlich, Mark G CIV NAVAIR, WD) 4. 11:39 AM - Re: Re: Reverse Rotation On Shutdown (Rico Jaeger) 5. 02:39 PM - Re: Re: Reverse Rotation On Shutdown (A. Dennis Savarese) 6. 06:43 PM - Re: Re: AvMAP Ultra EFIS (Roger Kemp) ________________________________ Message 1 _____________________________________ Time: 03:05:01 AM PST US Subject: Yak-List: Re: AvMAP Ultra EFIS From: "Etienne Verhellen" Roger that Jan. Take care buddy. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430663#430663 ________________________________ Message 2 _____________________________________ Time: 03:20:10 AM PST US Subject: Yak-List: Re: AvMAP Ultra EFIS From: "Etienne Verhellen" Hi Doc, using the RMU gyro for the DYNON EFIS -D10A. And an extra pitot tube. Static from the main. KR, Etienne. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430664#430664 Attachments: http://forums.matronics.com//files/image_218.jpg ________________________________ Message 3 _____________________________________ Time: 11:21:54 AM PST US From: "Bitterlich, Mark G CIV NAVAIR, WD" Subject: RE: Yak-List: Re: Reverse Rotation On Shutdown I believe you might have had something wrong with your carb or your engine Steve. For you to have a fire in the carb intake as you have described, you would need a source of ignition for the fuel. That would require a backfire through the blower to the carb. Lots of reasons that could happen, but none them normal. Mark -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Steven A. Dalton Sent: Tuesday, September 16, 2014 7:04 PM Subject: Yak-List: Re: Reverse Rotation On Shutdown As I recently sold my Yak-52TW it may be inappropriate of me to comment, but: I owned my Yak with an M-14PF for 13 years. Without fail, EVERY time I moved the throttle full forward at shutdown I experienced a fire in the carb intake. After emptying a Halon bottle to stop the paint on the bottom of the cowling from burning any further I quickly decided this was a bad idea. I NEVER had such an experience with leaving the throttle at idle. YMMV, Batteries not included, past performance is no guarantee of future returns.... Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430643#430643 ________________________________ Message 4 _____________________________________ Time: 11:39:43 AM PST US From: Rico Jaeger Subject: RE: Yak-List: Re: Reverse Rotation On Shutdown As long as this thread has extended into this area...I have gone into this Yak business acutely alert for fire issues=2C since - some of you may recal l - the reason I got into a Yak at all was that I bought mine AFTER a catas trophic engine fire. While I never learned the details 1st hand=2C it would appear that it happened at start up since I had to siphon what seemed to b e full tanks. I was told the working theory was that the flexible fuel line going to the carb had split open=2C and with a thoroughly oil-soaked engin e compartment=2C the blaze and burn-duration were both impressive to behold .. As it is=2C my fuel pressure runs slightly high at higher power settings. S hould I be worried about slightly higher pressure fatiguing a line or fitti ng? I would hate to think this may be deja vu... Rico Jaeger 915 S. 11th Ave. Wausau=2C WI. 54401 715.529.7426 // 1966 Cessna 150F ^/---//-X N8558G // // 1992 Yakovlev Yak 52 ^/---//-X N21YK // > From: mark.bitterlich@navy.mil > To: yak-list@matronics.com > Subject: RE: Yak-List: Re: Reverse Rotation On Shutdown > Date: Wed=2C 17 Sep 2014 18:20:24 +0000 > mark.bitterlich@navy.mil> > > I believe you might have had something wrong with your carb or your engi ne Steve. > > For you to have a fire in the carb intake as you have described=2C you wo uld need a source of ignition for the fuel. That would require a backfir e through the blower to the carb. Lots of reasons that could happen=2C but none them normal. > > Mark > > > > > -----Original Message----- > From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@m atronics.com] On Behalf Of Steven A. Dalton > Sent: Tuesday=2C September 16=2C 2014 7:04 PM > To: yak-list@matronics.com > Subject: Yak-List: Re: Reverse Rotation On Shutdown > > > As I recently sold my Yak-52TW it may be inappropriate of me to comment =2C but: > > I owned my Yak with an M-14PF for 13 years. Without fail=2C EVERY time I moved the throttle full forward at shutdown I experienced a fire in the car b intake. After emptying a Halon bottle to stop the paint on the bottom of the cowling from burning any further I quickly decided this was a bad idea. I NEVER had such an experience with leaving the throttle at idle. YMMV=2C Batteries not included=2C past performance is no guarantee of future return s.... > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=430643#430643 > > > > > > > > > > > > =========== =========== =========== =========== > > > ________________________________ Message 5 _____________________________________ Time: 02:39:14 PM PST US From: "A. Dennis Savarese" Subject: Re: Yak-List: Re: Reverse Rotation On Shutdown Rico, If you do the math on what the fuel pressure is on the fuel hoses, based on what the fuel pressure gauge reads, you'll find the fuel pressure to be extremely low compared to the "working" pressure of the fuel hoses. To do the conversion, multiply whatever the instrument reading is times 14.22 to get PSI. So if your instrument is reading "5" (which is 5 KG/Sq.CM), the fuel pressure is approximately 71 PSI. In no way is this or even a "6" or "10" on the fuel pressure instrument going to cause a flexible fuel hose to burst UNLESS the hose is already deteriorated. Over the years I have seen many, many fuel hoses deteriorated to the point where if one were to bend or flex the hose, it would literally crack. Folks need to understand there really was a method to the Russian madness about replacing flexible lines every 5 (or 7) years. Just the same way they should be replaced on our Cessnas, Pipers and Beechcraft standard category airplanes. If one pushes the life limit of these hoses, you can be assured they will deteriorate and ultimately fail, possibly causing serious damage or even life-threatening situations. One of the most susceptible hoses to deterioration on the 52 is the primer hose which is mounted on upper right side (cockpit right) of the firewall. The hose goes all the way over to the left side of the engine and is affixed to a fitting mounted on a bracket on the #2 intake manifold. This hose for some reason, seems to deteriorate much faster than some of the other hoses under the cowling at a point just forward of the firewall. I believe this is due to there being a "heat pocket" up in that corner of the cowling. My recommendation is every time you open the cowl, run your hand over the primer flexible hose. If it is rough and like sandpaper, it probably is a good idea to replace it. How do I know this? Because it happened to me. Luckily I caught it before it became a catastrophy. I had the cowl open and was pushing the primer when I saw fuel spraying out of the top of this hose. Luckily I caught it before it became a disaster. Speaking of fuel hoses deteriorating, how many folks on the List actually check and VERIFY the fuel shut off is doing what it is suppose to do at least once a year? Other than testing it with the engine running, do you know how to test it without the engine running? You certainly don't want to find out you can't shut off the fuel AFTER the fire starts. Dennis ________________________________ From: Rico Jaeger Sent: Wednesday, September 17, 2014 1:39 PM Subject: RE: Yak-List: Re: Reverse Rotation On Shutdown As long as this thread has extended into this area...I have gone into this Yak business acutely alert for fire issues, since - some of you may recall - the reason I got into a Yak at all was that I bought mine AFTER a catastrophic engine fire. While I never learned the details 1st hand, it would appear that it happened at start up since I had to siphon what seemed to be full tanks. I was told the working theory was that the flexible fuel line going to the carb had split open, and with a thoroughly oil-soaked engine compartment, the blaze and burn-duration were both impressive to behold. As it is, my fuel pressure runs slightly high at higher power settings. Should I be worried about slightly higher pressure fatiguing a line or fitting? I would hate to think this may be deja vu... Rico Jaeger 915 S. 11th Ave. Wausau, WI. 54401 715.529.7426 // 1966 Cessna 150F ^/---//-X N8558G // // 1992 Yakovlev Yak 52 ^/---//-X N21YK // > From: mark.bitterlich@navy.mil > To: yak-list@matronics.com > Subject: RE: Yak-List: Re: Reverse Rotation On Shutdown > Date: Wed, 17 Sep 2014 18:20:24 +0000 > > > I believe you might have had something wrong with your carb or your engine Steve. > > For you to have a fire in the carb intake as you have described, you would need a source of ignition for the fuel. That would require a backfire through the blower to the carb. Lots of reasons that could happen, but none them normal. > > Mark > > > > > -----Original Message----- > From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Steven A. Dalton > Sent: Tuesday, September 16, 2014 7:04 PM > To: yak-list@matronics.com > Subject: Yak-List: Re: Reverse Rotation On Shutdown > > > As I recently sold my Yak-52TW it may be inappropriate of me to comment, but: > > I owned my Yak with an M-14PF for 13 years. Without fail, EVERY time I moved the throttle full forward at shutdown I experienced a fire in the carb intake. After emptying a Halon bottle to stop the paint on the bottom of the cowling from burning any further I quickly decided this was a bad idea. I NEVER had such an experience with leaving the throttle at idle. YMMV, Batteries not included, past performance is no guarantee of future returns.... > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=430643#430643 > > > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 06:43:41 PM PST US Subject: Re: Yak-List: Re: AvMAP Ultra EFIS From: Roger Kemp Copy Etienne. I'm using a splitter off the original Pitot. Do Sent from my iPad > On Sep 17, 2014, at 5:19 AM, Etienne Verhellen wrote: > > > Hi Doc, > using the RMU gyro for the DYNON EFIS -D10A. > And an extra pitot tube. Static from the main. > KR, Etienne. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=430664#430664 > > > > > Attachments: > > http://forums.matronics.com//files/image_218.jpg > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-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/yak-list Browse Digests http://www.matronics.com/digest/yak-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.