lml@lancaironline.net Mailing List Archive

<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> Randy: You almost have it right. IMHO the best plan is to use engine "as-is" to fit it and it's accessories to the firewall. Once you have it just the way you like it, take some pictures and send it off to the overhaul shoppe while you do the finish bodywork on the airplane. Be sure the engine is run in after overhaul. If you want to survive first flight it is wise to minimize the number of things you are testing for the first time. If you want to survive first flight it is wise to minimize the number of things you are testing for the first time. Yes, I said it twice. Regarding what you can and can't do to an engine, there is some confusion here due to the Data Plate. Every certified engine variant (TIO540-AE2A, 0320-E2G, IO540-K1E5D, etc) has a parts list that identifies what parts are assembled to create that particular engine variant. If you change any of those parts, outside of what the manufacturer has defined as acceptable, then you no longer have an engine that meets the specified configuration and it is no longer that engine variant. Confused? I don't blame you. If Randy takes his 0320-E2G and, during overhaul, decides to change the pistons to higher compression then it is no longer a 0320-E2G. It is now a Randy-0320 or whatever else he wants to call it. There is nothing preventing Randy from doing anything he wants to the engine but if he makes any significant changes to the portion of the engine that is defined in the specification then he must remove the manufactures data plate and install his own. This only really matters for the test flight where you have to fly 40 hours unless you have a certified engine and propeller combination and then you only have to fly 25 hours. The short answer is that you can modify a certified engine for experimental use but it is no longer a certified engine. Regards Brent Regan LML website: http://members.olsusa.com/mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please remember that purchases from the Builders' Bookstore assist with the management of the LML. Please send your photos and drawings to marvkaye@olsusa.com.