Message-ID: <3C90EA56.9010002@regandesigns.com>
Date: Thu, 14 Mar 2002 10:22:14 -0800
From: Brent Regan <Brent@regandesigns.com>
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To: Lancair List <lancair.list@olsusa.com>
Subject: Re: new engine questions
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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


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