lml@lancaironline.net Mailing List Archive

<x-flowed> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> Jim, Q-- I, too, am interested in when the FADEC will be ready for the IO-550. For exptl use, we don't need certification, so .... ? A-- FAA TC in six months. We will not have the engine "MAP" complete until the certification testing is complete. This mean sales for experimental use will follow the TC. Q--How will the FADEC unit handle LOP operation,which is one of the nice features of the IO-550? A--I will post a separate description of how FADEC will operate. It is out of the manual and is LONG. Q--I was pretty happy with my last one (ES #1), but I never did quite figure out the routine for jiggering the mixture in a long descent, with a flipover to ROP operation at some point down low. I also wonder how the FADEC algorithms will be built to handle these sorts of things. A-- The FADEC description should address this but bring out more questions! Q--Anyway, I notice that Cirrus are using an extended exhaust pipe, which they claim gives a bit of a performance boost, and probably reduces cockpit noise, too. Any thoughts on this? A--The SR-20 (IO-360-ES) uses an extended exhaust pipe. They also have a big muffler to complicate the issue. They do see an improvement. I question if it due due to "Tuning" and not the lower pressure where the exhaust exits. No information on the noise. I would expect it to be quieter also. Q--Is TCM working on the exhaust end at all? A--No, Most naturally aspirated exhaust are supplied by the airframer. We do give backpressure limits. I plan to test the final production exhaust for the SR-22 (IO-550-N7B) on the dyno. ERic-- LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. </x-flowed>