I am interested in trying some negative flap settings. This has the effect
of removing wing
area at cruise speeds. I've been back thru the archives and found a lot of
opinions, but
nobody seems to have actually done it. Might be tricky on the mono, but I'm
initially thinking
of a two position cam over type linkage on the flap rod that would shorten
the flap rod in
cruise. It really helps on my R/C sailplanes, raising the cruise speed
noticeably. Also used on
Lancairs and other hight speed a/c.
Glenn
>From: TELEDYNMCS@aol.com
>Reply-To: europa-list@matronics.com
>To: europa-list@matronics.com
>Subject: Europa-List: Drag Reduction
>Date: Tue, 29 Nov 2005 09:38:52 EST
>
>
>In a message dated 11/29/2005 2:58:14 AM Eastern Standard Time,
>europa-list-digest@matronics.com writes:
>
>
> > So get rid of much of that drag; it need be only relative to
> > a big, even faired bump on the fuselage bottom, and stowed
> > outriggers but in a place where some wing lift suffers.
> > Like laminar flow wheel pants, if one has a way to trust the
> > fairing mfr's sales literature. With laminer flow, fairing
> > drag goes down something like 60%.
> >
> > I've seen a dozen or so flying Europas now and I've been very surprised
>that
> > no one I've seen is installing flap gap seals and positive seals on the
> > ailerons, rudder and trim tabs. Stopping the pressure equalization
>between the
> > upper and lower surfaces of the wings and stab, plus the left and right
>side of
> > the rudder has been shown to significantly improve sailplane
>performance.
> > It's puzzling to me that more Europaphiles aren't using these
>techniques.
> >
> > On another note, my Sensenich hollow carbon prop arrived yesterday. All
>I
> > can say is "WOW". The quality is excellent! I'll let everybody know what
>it
> > weighs shortly.
> >
> > Regards,
> >
> > John Lawton
> > Dunlap, TN
> > A-245 (Installing the prop today....)
>
>
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