---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Sun 06/02/13: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:08 AM - Re: Floscan location and Matronics fuel line pulsation damper (Bob Leffler) 2. 03:36 AM - Re: how can I find out the gear reduction for the governor driv (Mike Whisky) 3. 10:02 AM - Re: Floscan location and Matronics fuel line pulsation damper () 4. 01:13 PM - Re: Floscan location and Matronics fuel line pulsation dampe (Bob Turner) 5. 01:40 PM - Re: Floscan location and Matronics fuel line pulsation damper (Kelly McMullen) 6. 03:32 PM - Re: Can you fix a broken BNC connector on a COM antenna? (Phil White) ________________________________ Message 1 _____________________________________ Time: 03:08:36 AM PST US Subject: Re: RV10-List: Floscan location and Matronics fuel line pulsation damper From: Bob Leffler Just to add some additional clarification to what Kelly stated. With the AFP purge valve in addition to cutting off the fuel feed for shutdown, it also functions to flush warm fuel with cold to aid in hot starts. I am also aware of one RV-10 with a Bendix that added a AFP purge valve. I suspect when you flush the fuel it will cause the EFIS to report more fuel consumed than actually used, but it really isn't a significant amount. Sent from my iPad On Jun 2, 2013, at 1:01 AM, Kelly McMullen wrote: > > It is an unusual installation for a Lycoming fuel injected engine to have a fuel return line. Bendix FI does not. AF has a purge line which may or may not return to the tank, but is only used for shutdown, there is no return when engine is running. Only Continental injection or systems modeled after it have an active return line, and there are sensors to account for that fuel, but not something that most RV-10 operations need to be concerned with. > On 6/1/2013 9:56 PM, ibspud@roadrunner.com wrote: >> >> Since, on injected engines, there is a fuel return line that goes from the pump back to the fuel selector valve, does the Floscan sender report higher flue flow than is actually used by the engine? Or is there only a small amount of fuel returned via that bypass route? >> Albert Gardner >> N991RV >> Yuma, AZ > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > > > > > ________________________________ Message 2 _____________________________________ Time: 03:36:12 AM PST US Subject: RV10-List: Re: how can I find out the gear reduction for the governor driv From: "Mike Whisky" Thanks everyone for your input. I'll report the adjustments I had to do in order to reach the low an high RPMs. Mike -------- RV-10 builder (final assembly) #511 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=401798#401798 ________________________________ Message 3 _____________________________________ Time: 10:02:14 AM PST US From: Subject: Re: RV10-List: Floscan location and Matronics fuel line pulsation damper I was referring to the return loop on the Airflow Performance pumps that goes from the pump manifold back to a T fitting at the fuel selector valve input. My calculated fuel consumption agrees closely with actual consumption so it appears there is little recirculated fuel involved. Just wondering what the return loop's function is? Albert Gardner N991RV Yuma, AZ ---- Kelly McMullen wrote: > > It is an unusual installation for a Lycoming fuel injected engine to > have a fuel return line. Bendix FI does not. AF has a purge line which > may or may not return to the tank, but is only used for shutdown, there > is no return when engine is running. Only Continental injection or > systems modeled after it have an active return line, and there are > sensors to account for that fuel, but not something that most RV-10 > operations need to be concerned with. > On 6/1/2013 9:56 PM, ibspud@roadrunner.com wrote: > > > > Since, on injected engines, there is a fuel return line that goes from the pump back to the fuel selector valve, does the Floscan sender report higher flue flow than is actually used by the engine? Or is there only a small amount of fuel returned via that bypass route? > > Albert Gardner > > N991RV > > Yuma, AZ > > > > > > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > > > > > ________________________________ Message 4 _____________________________________ Time: 01:13:34 PM PST US Subject: RV10-List: Re: Floscan location and Matronics fuel line pulsation dampe From: "Bob Turner" The return line helps set the fuel pressure. There is a check valve, and it relieves excess pressure by sending some fuel back to the pump's inlet side. So some fuel goes round and round, but not back to the tank. If your flowscan was between the return T and the pump you would read high, but anywhere else should be okay. -------- Bob Turner RV-10 QB Read this topic online here: http://forums.matronics.com/viewtopic.php?p=401838#401838 ________________________________ Message 5 _____________________________________ Time: 01:40:16 PM PST US From: Kelly McMullen Subject: Re: RV10-List: Floscan location and Matronics fuel line pulsation damper Your transducer is after that loop regardless of whether it is in the tunnel or on the engine. Has no effect on measurement going through the transducer. The loop simply allows the pump output to be held to a preset maximum, with any excess going back to the pump inlet. On 6/2/2013 10:01 AM, ibspud@roadrunner.com wrote: > I was referring to the return loop on the Airflow Performance pumps that goes from the pump manifold back to a T fitting at the fuel selector valve input. My calculated fuel consumption agrees closely with actual consumption so it appears there is little recirculated fuel involved. Just wondering what the return loop's function is? > Albert Gardner > N991RV > Yuma, AZ > > ---- Kelly McMullen wrote: >> >> It is an unusual installation for a Lycoming fuel injected engine to >> have a fuel return line. Bendix FI does not. AF has a purge line which >> may or may not return to the tank, but is only used for shutdown, there >> is no return when engine is running. Only Continental injection or >> systems modeled after it have an active return line, and there are >> sensors to account for that fuel, but not something that most RV-10 >> operations need to be concerned with. >> On 6/1/2013 9:56 PM, ibspud@roadrunner.com wrote: >>> >>> Since, on injected engines, there is a fuel return line that goes from the pump back to the fuel selector valve, does the Floscan sender report higher flue flow than is actually used by the engine? Or is there only a small amount of fuel returned via that bypass route? >>> Albert Gardner >>> N991RV >>> Yuma, AZ >>> >>> >>> >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> >> >> >> >> ----- No virus found in this message. Checked by AVG - www.avg.com ________________________________ Message 6 _____________________________________ Time: 03:32:09 PM PST US Subject: RV10-List: Re: Can you fix a broken BNC connector on a COM antenna? From: "Phil White" Simplest solution would be to purchase a BNC female to male adapter (or elbow connector), solder it onto the present antenna connector using a 'sweat solder' approach, very carefully not using too much heat to melt the inner insulation of the broken connector. If you've ever soldered copper water pipe, you know the concept. The pins are just there to provide a positive mechanical connection, the shell itself makes the negative electrical connection, center pin the positive. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=401840#401840 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-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/rv10-list Browse Digests http://www.matronics.com/digest/rv10-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.