Paul Lamar

I had wondered about going to the IO-720.. My impression is that the
prop end of the IO-720 crankshaft is no bigger than an IO-540/IO-580
(though I could be wrong), which they are already breaking in the race
environment..  I'll be somewhat surprised if they can push all that
much more HP through the IO720 than they do the existing 6 cylinder
engines.  I guess the cylinders will survive better though.


Regards,

Matt-

That is a good observation Matt.  That NXT, Relentless, was just using the
stock 720 without mods - he is trying to sell the plane after blowing up the
engine after a prop governor failure last year.  In this years race, he was
right there with Breathless, a Lancair Leggacy with a normally aspirated
IO-540.