Finn,

 

You guys really know how to take the wind out of my sails :-)

 

I am only reporting what I saw on ONE run (Its all I could stand, noise-wise).  At any rate, I know it let the engine wind up more, and my indicated increased by over 20 mph. (17.3795 knots for you knot guys)

 

Another note.  I was definitely temperature limited at that OAT.  The only way to get the speed is with the cowl flap closed, and after a couple of minutes at that speed, the temp limits were hit on my engine monitor.  Opening the cowl flap increases drag and costs me 10-15 mph.  I also have a self-imposed max speed of 170 with the cowl flap open, after an incident early on in the testing where it tore itself off the hinges in a run at Vne.  Supporting structure has since been beefed up, but still I stick to the limit.

 

Bill