whoops - I should qualify that.   The numbers below are for the piston EVO vs. the piston IVP.   I assumed that was what Ralf was talking about but maybe I was wrong.    Anyway, I don't see any de-rating of the IVP on the Lancair website so people shouldn't be dinging Lancair about that.    

Colyn

On Nov 4, 2011, at 3:40 PM, Colyn Case wrote:

check the lancair website.   I think the problem is at kitplanes.
lancair shows the IVP at 330mph.  but it will go 270 LOP.
Caveat, the evolution max cruise speed is the 24gph ROP best power number of 270 knots.    The LOP number they give is 240 knots.


On Nov 4, 2011, at 11:11 AM, <bronnenmeier@GROBSYSTEMS.COM> <bronnenmeier@GROBSYSTEMS.COM> wrote:

When I was reading through my December 11 kit plane magazine I came
across their 2012 kit aircraft directory where they give an overview
over all the airplane kits available today.

It just happened that I kept the December magazine from the previous two
years since I liked this compressed comparison. One really interesting
thing I found was that the Lancair IV changed its speed from 300 kts to
285 mph while the Evolution piston accelerated from 278 mph to 299 mph
over the three years.

I am really amazed by these marketing engineers and their ability to
beat the physics (e.g. designing an airplane with a bigger wing, bigger
cabin and higher empty weight and make it even fly faster)..... May be
someone can help me out since I don't have a degree in aircraft
aerodynamics.

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