Designed for 180 HP and runing at 100 Hp is why it will run longer than a
VW, rotax, cont. or Jab in the final analynis.
Jim
On Sat, 8 Jul 2006 01:19:30 EDT ifly...@aol.com writes:
> There have been more crank failures in Continentals/Lycomings than
> any other
> aircraft engines - but they have also gone through much more in
> testing and
> many thousands of engines flying. Many Broken VW cranks have
> never been
> documented or tested - just replaced and gone on...There have been
> changes and
> upgrades in VW cranks - I know because I bought a 980.00 crank for
> my 2180
> turbo back in 1991...(And I heard of many of those breaking).
> There have been
> three document broken cranks on Corvair aricraft and a couple found
> cracked.
> There have also been thousands of hours of no problems on Corvair
> cranks.
> The solution to all broken crank issues (no matter the engine) is
> to find the
> limits and to stay within them or modify the crank. Cast cranks
> may work on
> a 1600 - but not a 2180 - a forged may work on a 2180 but not a
> 3000. A
> forged / nitrided may work on a 3000...you get the picture. This
> is
> experimental aviation and there are risks as always. The name of
> the game is to reduce
> the risks as much as possible and achieve your goals. I could
> have used an
> O200 but been outside of my expense goals...A corvair is easily
> inside my
> expense goals and the added perormance reduces my risk factor - but
> I do have
> to nitride the crank (150.00) . The Vw was also close to expense
> goals but
> not within performance goals and to make a VW perform like a corvair
> is too
> expensive. (Check pricing of new 3000 from Revemaster) The VW
> engine works
> well in the 60 - 70 HP range but I am not comfortable with
> stressing one out
> past that (not intended for that output) The Corvair was designed
> to handle
> 180 Hp and I run it at 100 - less stress on all parts overall.
>
> Plus, I just love the sound of my mini Merlin sound.....have
> you ever
> heard a corvair fly overhead at 180+ ? I finally heard Mark
> Langfords (I
> never hear mine) and it sends chills down your spine...makes you
> want to go
> flying....
> Build and fly safe all.....
> Well...time for bed
>
> Bill and N41768
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