---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Wed 03/14/07: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:09 AM - Lycoming 0-235 Screen Oil Filter (victor verdev) 2. 11:45 AM - Re: Re: New Lycoming Website (teamgrumman@aol.com) 3. 12:10 PM - Fuel pump tests (Gilles Thesee) 4. 02:23 PM - Re: Fuel pump tests (Hinde, Frank George (Corvallis)) 5. 05:34 PM - Re: New Lycoming Website (Jon A. Delamarter) 6. 11:02 PM - Re: Re: New Lycoming Website (teamgrumman@aol.com) ________________________________ Message 1 _____________________________________ Time: 08:09:10 AM PST US From: victor verdev Subject: Engines-List: Lycoming 0-235 Screen Oil Filter I'm installing an the old style oil screen filter housing(69510) with internal screen on A used 0-235 LYC. The housing has the Temp Control oil cooler bypass valve(75944) installed in end of housing. Does (69510)housing bolt right onto the engines accessory housing, or does it need the steel adapter plate(LW-12999)between housing and engine? Get your own web address. http://smallbusiness.yahoo.com/domains/?p=BESTDEAL ________________________________ Message 2 _____________________________________ Time: 11:45:20 AM PST US Subject: Re: Engines-List: Re: New Lycoming Website From: teamgrumman@aol.com Thanks for the response. I do firewall forward restorations on Grumman Tigers and Cheetahs about 3 or 4 times a year. About 50% of them ask for the LASAR mags and, quite frankly, I discourage it because of my experience with Unison. They, it appears to me and everyone else with whom I've talked, have no desire to produce this product. I get the impression that the LASAR mags are a nuisance to them. I would like to see Lycoming take the initiative and produce an electronic ignition for their engines. And do it a lot simpler than Unison. Right now there are several electronic ignitions on the market for experimental aircraft that are clean and simple; get one of them approved for certified aircraft. Gary -----Original Message----- From: jdelamarter@lycoming.textron.com Sent: Tue, 13 Mar 2007 11:04 AM Subject: Engines-List: Re: New Lycoming Website Gary: Thanks for your question. I'm not aware of any intitiative from Lycoming to procure any part of Unison's business. However, I am frequently in contact with Unison. I would like to forward your request to my contact, Fred Sontag. Please email me your concerns at jdelamarter@lycoming.textron.com. I willcommunicate with Fred and ask him for a response. I know from talking to him that he is working hard to close the loop on these types of concerns. He took care of one of my customers recently in an extremely effective manner. Regards, -------- Jon A. Delamarter Thunderbolt Manager Lycoming Engines Read this topic online here: http://forums.matronics.com/viewtopic.php?p=100312#100312 ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. ________________________________ Message 3 _____________________________________ Time: 12:10:43 PM PST US From: Gilles Thesee Subject: Engines-List: Fuel pump tests Hi all, Just conducted some test on our Rotax 914 fuel system, just to learn more. The idea was running a brand new electrical pump with clear plastic tubing from different points of the circuit, and observing what was going on. We noted that slugs of bubbles appear on the suction side of the pump when it is connected downstream of the fuel valve (large pressure drop). On the pressure side of the pump, very few bubbles appear. My interpretation is that when the pump draws fuel from a restricted portion of the circuit such as the fuel valve and all the fittings and elbows, the most volatile fraction of the fuel tends to vaporise, and then condenses when under pressure downstream of the pump. I believe this is a normal phenomenon, but it was the first time I observed it through clear hoses. Has anyone already seen such a phenomenon ? Any comments ? Some info on our engine fuel system here : http://contrails.free.fr/engine_regul_en.php Thanks, Regards, Gilles Thesee http://contrails.free.fr ________________________________ Message 4 _____________________________________ Time: 02:23:39 PM PST US Subject: RE: Engines-List: Fuel pump tests From: "Hinde, Frank George (Corvallis)" Your right that is exactly what is happening. It also gets worse as the temperature of the fuel increases, namely thru a hot engine driven pump...I gets worse further with altitude and the harder you suck on the fuel. When it gets really bad its called vapour lock and your engine quits. It will also happen more with autofuel than with 100LL due to the higher vapour pressure of the mogas. Low wing airplanes (with wing tanks and no header tank are much more susceptable because the engine driven pump is sucking uphill. This coindiently may happen at the worse possible time i.e a hot Summer day at a high altitude airport where your fuel has been heat soaked....You run full power, the engine gets real hot and Here come the trees! So, what to do?....Mount a low pressure electric pump as close to the outlet of tha tank as possible with no pressure drop on the inlet side of the pump. My Zenair Zodiac (and my current Fuel injected RV 7) did not have an engine driven pump, just a Facet fuel pump in each wing root. Thus the pump always pushed on the fuel, never sucked. The pumps were (are) wired to independent circuits such that if a pump failed the other pump will take over. Lycomings typically have a low level booster pump to augment the engine driven pump and that's with 100LL. Frank RV7a no engine driven pump, mainly cus one day I want to use Mogas in it....but only below about 15,000feet. -----Original Message----- From: owner-engines-list-server@matronics.com [mailto:owner-engines-list-server@matronics.com] On Behalf Of Gilles Thesee Sent: Wednesday, March 14, 2007 12:10 PM Subject: Engines-List: Fuel pump tests --> Hi all, Just conducted some test on our Rotax 914 fuel system, just to learn more. The idea was running a brand new electrical pump with clear plastic tubing from different points of the circuit, and observing what was going on. We noted that slugs of bubbles appear on the suction side of the pump when it is connected downstream of the fuel valve (large pressure drop). On the pressure side of the pump, very few bubbles appear. My interpretation is that when the pump draws fuel from a restricted portion of the circuit such as the fuel valve and all the fittings and elbows, the most volatile fraction of the fuel tends to vaporise, and then condenses when under pressure downstream of the pump. I believe this is a normal phenomenon, but it was the first time I observed it through clear hoses. Has anyone already seen such a phenomenon ? Any comments ? Some info on our engine fuel system here : http://contrails.free.fr/engine_regul_en.php Thanks, Regards, Gilles Thesee http://contrails.free.fr ________________________________ Message 5 _____________________________________ Time: 05:34:47 PM PST US Subject: Engines-List: Re: New Lycoming Website From: "Jon A. Delamarter" Gary: Actually, Lycoming is extensively engaged in Electronic Engine Control development. I can't spill the beans yet, but suffice to say that we are making excellent progress and I am really excited about the product we will be bringing to market! This system will control all engine parameters, not just ignition. Keep watching! All the best, -------- Jon A. Delamarter Thunderbolt Manager Lycoming Engines Read this topic online here: http://forums.matronics.com/viewtopic.php?p=100596#100596 ________________________________ Message 6 _____________________________________ Time: 11:02:19 PM PST US Subject: Re: Engines-List: Re: New Lycoming Website From: teamgrumman@aol.com Awesome. In what year? -----Original Message----- From: jdelamarter@lycoming.textron.com Sent: Wed, 14 Mar 2007 5:33 PM Subject: Engines-List: Re: New Lycoming Website Gary: Actually, Lycoming is extensively engaged in Electronic Engine Control development. I can't spill the beans yet, but suffice to say that we are making excellent progress and I am really excited about the product we will be bringing to market! This system will control all engine parameters, not just ignition. Keep watching! All the best, -------- Jon A. Delamarter Thunderbolt Manager Lycoming Engines Read this topic online here: http://forums.matronics.com/viewtopic.php?p=100596#100596 ________________________________________________________________________ AOL now offers free email to everyone. 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