Steven A Eberhart wrote:
>
> On Tue, 14 Oct 1997, Graham Singleton wrote:
>
> > >>I'm very happy with my airplane, but don't wish to be associated (by
> > remaining
> > silent) with any comment that states that it flys "as advertised". Sorry <<
> >
> > I've flown several Europas, (not including Alan's ) and have been surprised
> > by the wide variation in performance. At one end Kim Prout and his
> > apparently "standard" ship which achieves 150 kts full speed and at the
> > other G-KITS which seems to have a built in headwind.
> > I scratch my head but have yet to discover a simple or single reason for
> > differences.
> > Graham
>
> I have always wondered how true to the design airfoil profile you could
> build a hot wired foam core wing when you weren't given coordinates or
> templates for key stations. Dr. Selig at the University of Illinois,
> co-designer of the NLF(1)-0115 airfoil that I think is very similar to
> Don Dykins Europa Airfoil, is very annimate about the accuracy necessary
> to achieve all of the design characteristics of any given airfoil.
>
> Could it be that there are 400 or so diffrent airfoils on the different
> Europas? Sure would like to see some airfoil measurements from the
> fastest and slowest planes. Boeing uses my Statistical Process Control
> software to monitor the process variations in the manufacture of many of
> the composite components for the 757, 767, 777 and V-22 Osprey. I know
> their tolerances are FAR greater than a builder can achieve without any
> specifications to build to.
>
> Steve Eberhart
> newtech@newtech.com
So, where does one go to obtain station points/measurements for the
airfoil in question?
|