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Old January 25th 06, 04:00 AM posted to rec.aviation.homebuilt
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Default Corvair conversion engines - cracked crank link

clare at snyder.on.ca wrote in message
...
On Tue, 24 Jan 2006 16:22:45 -0500, "Peter Dohm"
wrote:


"Rich S." wrote in message
...
"Peter Dohm" wrote in message
news ---------much snipped-----------


These were also 40 year old cranks of unknown provenence, pulled out
of old car engines that may have been thrashed to within an inch of
their lives in previous "inCARnations"

This has been my area of concern as well. I would really find these
engines more attractive if I was confident that a complete new engine
could
be built.

New engines don't have crankshaft problems?

BWAHAHAHAHAHAHA!!!

Rich S.

Yes. I know that they do, and new design engines are notorious; as are
design improvements, changes of supplier, etc. And they include plenty

of
reasons for loss of power not caused by the crankshaft!

However, my concerns include, reliability, maintainability, and eventual
replacement; and I think you understand my point.

At this point, the Jabiru 3300 is the only engine that really looks to me
like a promising replacement; and I really don't know its service record.
However, albeit at a higher dollar price, its features seem to preserve:

1)
similar or lighter weight, 2) similar or higher power, 3) six cylinder
smoothness, 4) reasonably slow idle, and 5) similar dimmensions.

Additional
benefits are designed in dual ignition and an updraft intake system,

similar
to Lycoming and Continental, which should be more resistant to ice.

Peter

By what reasoning? Virtually all carbureted aero engines are
sucseptible to carb ice - doesn't matter where the carb is.


As another poster also pointed out, my memory was faulty and it is easy to
form ice in the O-200, even though the carburetor appears to be in the path
of heated cooling air from the cylinders.

Peter