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<DIV>John, please consider the OS 160 with either a Perry pump or the topper tank arrangement I and many others have discussed at length. You don't need to use a tuned pipe with this engine, but if you do, a Mueller RTC header and Macs 1092 muffled tuned pipe, are a good ticket. This is about as inexpensive yet reliable and consistent set-up as you can get. And I am still on the original bearings in my first set-up, after almost three years and about 200 flights in my 12 pound Enigma design</DIV>
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<DIV>This is a good set-up and turns a 17x13 std with authority, or a variety of other props including the 15.5x12 4 blade. I haven't tried it myself but I believe the Dave Lockhart 3 blade would be a good match also. </DIV>
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<DIV>But you can certainly use the muffler that comes with it. Just a little heavier than some of the rigs that so many have complained about. FWIW</DIV>
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<DIV>MattK</DIV>
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<DIV><FONT face=Arial>Thanks for the details. I was coming to the same conclusions, but it was <BR>going to take a long time. I came to Pattern when YS was a rising star and I <BR>have never made any sort of peace with tuned pipes. The result is that I <BR>have been more comfortable flying the YS 4S's. I don't think the engine is <BR>going to make much difference in my flying, there are other factors limiting <BR>me. Also, I have more of them than I care to admit!<BR><BR>Here is where I stand:<BR> Electric is just more $$$ than I want to spend.<BR><BR>DZ's are a separate animal... out of my range by both availability and cost. <BR>Besides, I think that is where most of the YS problems live. The cost of <BR>fuel is second only to the electrics.<BR><BR>2 Strokes seem to be fragile (esp bearings), parts sometimes elusive or even <BR>unobtainable. They also seem to be more pricey than they need be with their <BR>simplicity. The biggest negative to me is the matter of dealing with the <BR>fuel mixture/tuned pipe problems. I am beginning to weaken though.<BR><BR>When you say YS 4 stroke you have consider the model.<BR>The 120SF is really inadequate for a full size 2m airplane.<BR>The 120AC's are all but gone and so are the parts..besides being inadequate <BR>today.<BR>The 120SC was proof that YS could & would produce junk.<BR>The 140L is a shaker with a tendency toward tempremental.<BR>The 140 Sport/FZ is great IF it has enough guts to fly your aiprlane in your <BR>class. I find it a push in Advanced with a Focus and a 16-10 Apc on 20% <BR>nitro.<BR><BR>I don't think we have a good engine choice today, at least not for guys like <BR>me.<BR><BR>My current plan is to drop back to the Prophecy/140 combination. At least it <BR>is affordable and reliable to me.<BR><BR>John Ferrell</FONT></DIV></DIV>
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