I have wheel pants and fairings (the speed kit) on my Europa Tri-gear High-top
- speed kit built by Bud Yerly. I went from 119 kts to 137 knots (at 1000 ft
full
throttle) after putting them on. Talk to Bud - I don't know if he still makes
them but I am very satisfied - and they are easy to work with - one bolt,
two screws and a pin and they are off. After 400 hrs. and 8.5 years only
slightly
dinged up (dumb tax for not being more careful rolling the plane out and hit
a door guide in the hanger).
Gary Leinberger
Europa High-top 912 S
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Today's Message Index:
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1. 02:33 AM - Re: Wheel fairings (Kevin)
________________________________ Message 1
_____________________________________
From: Kevin <kjburns@btinternet.com>
Subject: Re: Europa-List: Wheel fairings
Frans,
Reading your improving nose wheel fairing , did you achieve good results ?
Did you make more than one ? I am currently in need of a nose wheel fairing ,
Also
need a full set of leg fairings , including transitioning to fuselage and
main wheel pants / wheel fairing ..
Im pressed for time so cant make my own at moment , dont see point of making
fresh
moulds when , improved ones are sitting on a bench somewhere ..
Regards
Kevin
Sent from my iPad
> On 19 Aug 2012, at 23:38, Frans Veldman <frans@privatepilots.nl> wrote:
>
>
>> On 08/19/2012 10:41 PM, craig wrote:
>> --> Europa-List message posted by: "craig"<craigb@onthenet.com.au>
>>
>> Frans, could you elaborate on the "correct length would be shorter"
>> wouldn't the longer shallower transition Create less drag and thus
>> make your longer fairing more efficient.
>
> There is also something like skin drag. More surface creates more
> drag. So there
is an optimum somewhere: for a 2D fairing (like for a strut or a wheel leg) the
optimal width to length ratio would be 1:3.7, with the widest point at about
30% of the length. For a 3D fairing things get a bit more complicated. Shorter
carries a higher penalty than longer, so if in doubt just make it longer.
>
> Frans
>
>
|