Re: Light-Sport Aircraft Yahoo group Military Rotax 912/914 with fuel injection..

And just about every certified aircraft I see being sold list total time which
is usually less than the TBO time of the engine but the engines almost always
have seen a top overhaul haven been done like 1 or 2 hundred hours before sale
and about half of TBO times.. Kinda makes you wonder about their TBO specs!
John

On Friday, December 30, 2011 09:33:23 PM Marc wrote:
> I keep reading of TBO on auto engine conversions. Where do we find a TBO
> published for an auto conversion. I know that modern auto engines properly
> cared for with routine maintanence are lasting 500,000 miles + these days.
> It's usualy the stuff that's hung on around the engine that gives up first.
> Aero engines are given a TBO after many hours of documented test runs, and
> later modified as real life field experiances show better or worse
> lifetimes than initially expected.
>
> Many Continental engines list TBO as 1200 for the E-165 to 1800 hours for
> the IO-420, while Lycoming run from 1200 in the case of the TSIO 540 up to
> 2400 hours for the O 235. Field experiances and improvements has allowed
> the TBO for some Continentals to move up to the 2000 hour mark now.
>
> Who certifying, testing, the auto engines for XX hours to wear limit? And
> what are those wear limits??
> --- In Sport_Aircraft@yahoogroups.com, "apollonorthamerica"
<apollonorthamerica@...> wrote:
> > Hi Peter,
> > Having done hands on about a dozen car engine conversions (Suzuki and
> > Subaru) on aircraft, I think you have got this wrong: "A late model car
> > engine in a plane would likely reach a TBO of 2000 hours with only oil
> > filters plugs and timing belts"
> >
> > I don't think that will happen quite like that :).
> > Auto engine conversions can reach the TBO in isolated cases. Sometimes a
> > certain combination of parts makes a system that will reach TBO but
> > they are rare.
> >
> > Rotax reaches its TBO and beyond because it -IS- designed from the
> > get-go as an aircraft engine. Just not the 1950's tractor technology
> > aircraft engine. Abid

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