---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 12/16/05: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:33 AM - Re: Re: Bob Borger especially (UVTReith@aol.com) 2. 01:39 AM - Re: Re: Bob Borger especially (BEBERRY@aol.com) 3. 07:57 AM - Rotax 912S Mixture Control (irampil@notes.cc.sunysb.edu) 4. 04:25 PM - Re: Rotax 912S Mixture Control () ________________________________ Message 1 _____________________________________ Time: 01:33:25 AM PST US From: UVTReith@aol.com Subject: Re: Europa-List: RE: Bob Borger especially --> Europa-List message posted by: UVTReith@aol.com Sealing and positioning of NPT threads NPT threads were always installed with PTFE sealing tape. Take some more, if you need, to get the right position. PTFE tape is elastic enough to withstand vibrations and the material will cover nearly all fluids. I'm wishing all of the board a very merry X-mas, a good start, health, success for the comming year and a lot of fun with the Europa. Bruno Reith / Europa Aircraft Germany Monowheel XS with smart-Brabus 102 HP turbocharched engine and Woodcomp prop. Ready to go springtime 2006 ________________________________ Message 2 _____________________________________ Time: 01:39:08 AM PST US From: BEBERRY@aol.com Subject: Re: Europa-List: RE: Bob Borger especially --> Europa-List message posted by: BEBERRY@aol.com I have been flying a PA28 for 4 years with a major avgas joint sealed with PTFE tape and have had no leaks or problems of any sort. Joint is a right angle where fuel enters a/c from port wing tank. Patrick ________________________________ Message 3 _____________________________________ Time: 07:57:45 AM PST US Subject: Europa-List: Rotax 912S Mixture Control From: irampil@notes.cc.sunysb.edu 12, 2005) at 12/16/2005 10:56:24 AM, Serialize complete at 12/16/2005 10:56:24 AM --> Europa-List message posted by: irampil@notes.cc.sunysb.edu Season's Greetings to all! I'd like to open a new topic for comment/discussion. A company I have been watching finally developed an altitude-mixture compensation kit for Bing 64 carbs. http://www.greenskyadventures.com/bing/HACmanorder.htm I have not seen any discussion about it here or the other places I scan, so perhaps, we can start here. We all know the autocompensation pretty much fails by 8000 feet. This device would, if it works and is suitably reliable, better fuel consumption and power, and a somewhat higher service ceiling. Has anyone tried it yet? Does anyone know anyone who has (and lived to describe the experience)? Ira J. Rampil, N224XS ________________________________ Message 4 _____________________________________ Time: 04:25:19 PM PST US Subject: Re: Europa-List: Rotax 912S Mixture Control From: --> Europa-List message posted by: Hello Ira "altitude-mixture compensation kit for Bing 64 carbs" Search my name and mixture in archives and you will find what I am doing for my 914 which will work pretty much same for 912 or 912S except for the enrichment below 108% power. I purchased a 912 kit from Greensky primarily for the needle valve. I will not use most of the hardware and lines, better quality is to be had. The needle valve is OK except the engraved front is not very nice, will cover face with engrave placard. One thing to consider is if you adjust mixture for cruise and at altitude, if you forget to enrich when you pull back throttle, since there is greater vacuum downwind of the carbs at the crossover tube at lower throttle setting, and you have this plumbed to your float bowl vent, you will run plenty lean and can quit the engine. Not as bad on the flip side, if you adjust mixture for a low throttle opening, when you advance throttle you may not be lean enough. This scenario far more critical for a touchy 2 stroke, but still good to keep in mind. Besides having 2 EGTs, 1 for each side, I am installing a Split Second Mixture Monitor that is run off a O2 sensor. You will see a lean mixture right away. I have quite a bit of experience fooling with motorcycle carbs. I have yet to find vent hose that holds up as well as OEM. Lockwood wants something like 68$ a meter for Rotax vent hose. They made an error and will not listen to reason. LEAF wants 68$ for like 10 or 12 feet. That is still outrageous, but probably what Rotax meant. Anyway I broke down and bought some. Before doing though, I ordered at least a half dozen 1 foot samples from McMaster, close but no cigar for such an important mission of a hose. I more thorough thought through install on a 914 compared to 912 or 912S. In the event there is a leak anywhere on the lean side of things, if I hit my enrichment button it will bypass the whole circuit and at worst run just a bit rich. You would be well advised to consider purchasing and installing some sort of fail safe in the event of a leak. You see with the mixture monitor you can at least tell if you are rich or lean. With just a EGT and you are running just a bit lean for any number of reasons, you may not know that you are lean. Under no circumstances use the tygon tubing that Greensky sells and jeopardize your beautiful bird. 1 solution would be to purchase and use a 914 solenoid that toggles between ambient pressure and the needle valve. You could even rig a circuit where if the output of the O2 sensor was anything more than a bit lean of 14.7 to 1 it would engage the solenoid and plumb it to ambient pressure. If I find it is all too easy to kill the motor when adjusted for high altitude cruise and pulling throttle at a lower altitude, I may consider this as well. I will install a restrict near the manifold connection just large enough to allow needed lower pressure compared to airbox pressure. In the event there was a leak in the circuit and I bypassed with the rich button, not too much air would get in the manifold and unto itself lean things out. I talked to the Guru at Greensky and thought my business plan sounds reasonable sound. I have all the stuff to do a ground test on your plane if ya wanna give it a try. If you like how it reacts, order up the stuff you need. I would not fly with it until you have the best hardware, a plan to deal with a leak and a mixture monitor and at least 2 EGTs. I am not at all familiar with your "Glass". I would think it may be versatile enough where it may be able to take an input from a O2 sensor and display it in a reasonable fashion. If it can, you could use my Monitor to map voltage versus mixture. Then just purchase a O2 sensor and Stainless weld on Bung from Split Second. Ron Parigoris