---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sun 02/24/13: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:36 AM - SV: Re: SV: fuel flow and return line status (Sidsel & Svein Johnsen) 2. 09:52 AM - Re: Re: SV: fuel flow and return line status (houlihan) 3. 10:17 AM - SV: Re: SV: fuel flow and return line status (Sidsel & Svein Johnsen) 4. 10:37 AM - Alodine treatment of aluminium parts (K BURNS) ________________________________ Message 1 _____________________________________ Time: 09:36:33 AM PST US From: "Sidsel & Svein Johnsen" Subject: SV: Europa-List: Re: SV: fuel flow and return line status >From the two replies to my first message, and reading once again Bud Yerly's detailed explanation last fall on how he set up a one-sender unit, I now understand how one sender can be made to work accurately enough to show fuel consumed/remaining. As I indicated in my second message, the reading error at flows outside the normal cruise power evidently are of too short duration to give much error in the flow x time = consumption calculation. The attached illustration shows this clearly, I think (it is fairly accurate to scale). I therefore regret my earlier statement that one single transducer will serve only one useful purpose: with the engine stopped and the electric feed pump running, one can check that the return line is open. In actual fact, this feature is an additional feature to keeping good enough track of fuel consumed (provided that a K-factor has been found that gives true consumption for a typical flight time). With my two-sender system (one in feed and one in return line), I cannot check that the return line is open unless I somehow disconnect momentarily one of the senders. I have therefore asked Electronics International in which wire I can introduce a push-to-break pushbutton mounted next to the display unit. This return flow check will then become an item in my pre-engine-start checklist. I will then also be able to inform the List about actual return flows at various power settings and tank levels, for those who share my sometimes too deep interest in the mysteries of our aircraft! Regards, Svein LN-SKJ ________________________________ Message 2 _____________________________________ Time: 09:52:03 AM PST US Subject: Re: Europa-List: Re: SV: fuel flow and return line status From: houlihan Hi Svein. Looking at your graph you seem to have documentary evidence of high quality aviating including a decent landing ! ! that's very good, I wish I could do decent landings :<) Tim On 24 February 2013 17:34, Sidsel & Svein Johnsen < sidsel.svein@oslo.online.no> wrote: > From the two replies to my first message, and reading once again Bud > Yerly's detailed explanation last fall on how he set up a one-sender unit, > I now understand how one sender can be made to work accurately enough to > show fuel consumed/remaining. As I indicated in my second message, the > reading error at flows outside the normal cruise power evidently are of too > short duration to give much error in the flow x time = consumption > calculation. The attached illustration shows this clearly, I think (it is > fairly accurate to scale).**** > > ** ** > > I therefore regret my earlier statement that one single transducer will > serve only one useful purpose: with the engine stopped and the electric > feed pump running, one can check that the return line is open. In actual > fact, this feature is an *additional* feature to keeping good enough > track of fuel consumed (provided that a K-factor has been found that gives > true consumption for a typical flight time).**** > > ** ** > > With my two-sender system (one in feed and one in return line), I cannot > check that the return line is open unless I somehow disconnect momentarily > one of the senders. I have therefore asked Electronics International in > which wire I can introduce a push-to-break pushbutton mounted next to the > display unit. This return flow check will then become an item in my > pre-engine-start checklist.**** > > ** ** > > I will then also be able to inform the List about *actual* return flows > at various power settings and tank levels, for those who share my sometimes > too deep interest in the mysteries of our aircraft!**** > > ** ** > > Regards,**** > > Svein**** > > LN-SKJ**** > ________________________________ Message 3 _____________________________________ Time: 10:17:37 AM PST US From: "Sidsel & Svein Johnsen" Subject: SV: Europa-List: Re: SV: fuel flow and return line status Hi Tim, I stand corrected. Very decent of you to make me aware of the spelling error, so that I can avoid it in the future! Actually, the graph is not typical of my own landings, especially not on grass strips. I really have a problem seeing them from above, and once I did a 360 on final descent ( J ) just to have time to verify that I was approaching the right strip of open land (maybe not good aviation practice ...). But, having the benefit of a two-sender fuel flow system, I always know how much fuel I have left! Regards, Svein Do not archive ________________________________ Message 4 _____________________________________ Time: 10:37:42 AM PST US From: K BURNS Subject: Europa-List: Alodine treatment of aluminium parts Hi ,=0AI have new outrigger brackets that I was about to etch prime and pai nt, what is the durability of alodine ...has it been used unpainted ? if so how well did it protect ?=0A-=0AIf it is better painted-on top of... -what benefit is there over etch primer and twin pack paint?=0A-=0AAny source for small quantity known in UK ?=0A-=0Aregards=0AKevin ------------------------------------------------------------------------------------- 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.