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  #11  
Old 10-22-2018, 07:28 AM
49clipper 49clipper is offline
 
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Quote:
Originally Posted by 6 Gun View Post
From post #3 any engine installed on an Exp is a Exp engine
If that is true why do most exp airplanes with certified engine and prop only have to fly off 25 hrs and exp engine and props 40 or more hours?An engine and prop can remain certified if work is done by A&P and signed off by IA even if it is on an Exp airplane.
Bob
Entirely correct, 6 gun. Its still certified no matter what it is bolted to, unless you make changes or do not keep up with all the AD's/SB's for that model and are an AP/IA. Its a paperwork thing. The FAA "ASSUMES" that if you built it (engine) yourself or modified something, or was not direct from the factory, it is EXP, and therefore should have more flight test time. IMHO
Jim AP/IA
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  #12  
Old 10-22-2018, 10:20 AM
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Sam Buchanan Sam Buchanan is online now
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Getting the corn popper warmed up.........
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  #13  
Old 10-22-2018, 11:25 AM
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nomocom nomocom is offline
 
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Default compression ratio

If I was buying an experimental engine, I'd want to know what the compression ratio was and consider if it fit my mission. I don't know what percentage of experimental engines have higher compression than stock, but if the unit in question does, I suggest talking with Aerosport about your mission and make sure it is a good fit for you.
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  #14  
Old 10-22-2018, 02:27 PM
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N941WR N941WR is offline
 
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Location: SC
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Quote:
Originally Posted by 6 Gun View Post
From post #3 any engine installed on an Exp is a Exp engine
If that is true why do most exp airplanes with certified engine and prop only have to fly off 25 hrs and exp engine and props 40 or more hours?An engine and prop can remain certified if work is done by A&P and signed off by IA even if it is on an Exp airplane.
Bob
I'm not sure that is correct.

I do know of one new RV that used and engine and prop from a damaged RV and was given a 25 hour test period because it was previously in a certified airplane. BTW, the engine was built up from miscellaneous parts and didn't have a data plate.

Hopefully Vick or Vern will chime in.
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  #15  
Old 10-22-2018, 03:01 PM
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humptybump humptybump is offline
 
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Quote:
Originally Posted by Sam Buchanan View Post
Getting the corn popper warmed up.........
Thanks Sam. You do enjoy a good bowl of pop corn

To the OP, you are learning as you get involved and read this for and others.

There are two terms to pay attention to - “certified” vs “certificated”.


My RV-8 does not have a certified engine but it does have a certificated engine.

Example: the Lycoming O-360-A4A is covered by the E-286 Type Certificate Data Sheet, Revision 21.
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  #16  
Old 10-22-2018, 08:13 PM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
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Quote:
Originally Posted by RV8er86 View Post
The engine on the aircraft I'm interesting in buying was overhauled back in 2000 by the Canadian company Aerosport Power and only has approx. 600 hrs since that last major overhaul.
600 hours is not much flying in 18 years. I'd be worried that this aircraft (and thus engine) might have been inactive for an extended period of time thus increasing the chance of corrosion of the camshaft and other parts. AeroSport Power are a reputable company but more to the point....who has been maintaining this engine for the last 18 years? ie. Were the mags overhauled at 500 hours. Were the hoses replaced at 7 years, etc etc etc. These are the more important questions.
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