On the tri-gear 'lookalike' (i.e. proper taildragger) there is a 9 knt speed
improvement (126 knt to 135 knt) with leg fairings alone. But the leg is
rectangular in section and offers a "flat plate" of about a third of a
square foot, so a significant improvement would be inevitable.
A further 8 knt speed improvement (135 to 143 knt) occurs with mainwheel
fairings similar to the Europa product, but closer in appearance to those
shown at:
http://www.teamrocketaircraft.com/TeamRocketAircraftcgi/hazel.exe
(let me know if you want some; I have moulds).
Flap hinge fairings aren't fitted (I await to be convinced that they are
beneficial) and some intersection fairings in the acute angle between legs
and wheels may net a little more.
Still trying to get to 150 knts! Will an extra 10% hp from cold air get me
there?
Duncan McF.
----- Original Message -----
From: "Andy Draper" <andy@europa-aircraft.com>
Subject: RE: Europa-List: Speed fairings - XS Mono
<andy@europa-aircraft.com>
>
> Dear Jim,
>
> When I did the flight testing for the speed kit on the mono-wheel, I was
careful to conduct the two comparison flights (each with at least 3 speed
runs each way) within an hour of each other to minimise errors. The
aircraft weight was also the same at each take-off and the runs were
conducted at full throttle and 5500rpm. Having corrected for temperature
and altitude the speeds were converted to TAS. A full 9 knots was gained
with the fairings in place, so your 2 - 3 knots gain may indicate a
measurement issue?
>
> The Tri-gear showed a 10 kt improvement using the same techniques.
>
> Regards
> Andy
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com]On Behalf Of Jim Brown
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Speed fairings - XS Mono
>
>
> Paul
>
> We have the XS mono wheel with a 914. After installing the speed fairings
we picked
> up 2 or 3 knots at best.
>
> I thank that maby the tri -gear may show more improvement than the
mono-wheel
>
> What about it, tri gear owners??????????
>
> Jim Brown
> N398JB
>
> Alan Stewart wrote:
>
<alan.stewart@blueyonder.co.uk>
> >
> > Hi,
> >
> > I tried to measure the cruise speed improvement in my 912 Classic
> > monowheel as accurately as possible, after fitting of the outrigger and
> > tail wheel fairings.
> >
> > I made several runs on a triangular course, at different power settings,
> > and worked out TAS by trigonometry. My measured speed improvement was
> > certainly less than 5 knots.
> >
> > Alan
> >
> > <paul.mcallister@qia.net>
> >
> > Hi All,
> >
> > Has anyone made any before and after easements on what the speed
> > fairings add to the top speed on the XS Mono's ?
> >
> > Thanks, Paul
> >
> > ==
> > ==
> > ==
> > ==
> >
>
>
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