Today's Message Index:
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1. 12:17 AM - Re: Airfoil Profiles (John Wighton)
2. 02:13 AM - Re: Airfoil Profiles (Area-51)
3. 02:17 AM - Re: Flap limiting speed 83 kts exceeded (JonathanMilbank)
4. 08:41 AM - US Fly-In Interest? (h&jeuropa)
5. 09:55 AM - Re: Re: Airfoil Profiles (Paul McAllister)
6. 01:26 PM - Re: US Fly-In Interest? (William Daniell)
7. 01:30 PM - Re: Airfoil Profiles (John Wighton)
8. 06:17 PM - Re: Flap limiting speed 83 kts exceeded (Paul M 383)
Message 1
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Subject: | Re: Airfoil Profiles |
When we scanned the Europa we used paint that was washed off afterwards. It is
commonly used by street artists. An initial attempt without paint led to big
gaps in the cloud data.
I like the root fairings, they look a bit like Frans Veldmans who was highly active
in Europa modifications. Whatever happened to Frans?
The tape is probably a better idea, as it limits the data - although there are
some coordinates for the sections along the wing - we used them years ago in
xfoil.
John W
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502215#502215
Message 2
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Subject: | Re: Airfoil Profiles |
Interested to know what polar results Xfoil popped out there John! Would still
want to cross reference results to those of Ansys Fluent though.
On 3d scanning; shiny surfaces are the devil... dead flat non-reflective surface
is going to save a lot of mumbling...water soluble hair spray and talcum powder
dust is a magic formula! Plenty of reference dots are required too... washoff
flat spray paint costs a bit more :)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502217#502217
Message 3
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Subject: | Re: Flap limiting speed 83 kts exceeded |
Paul,
While my aircraft was a mono, the combined flap / undercarriage lever had the standard
detents which held the lever either at fully retracted or fully down 27
degrees. When I decided after almost 20 years flying as a mono to convert to
tri-gear, Neville Eyre told me to support the aircraft in order to partly retract
the gear and use a clinometer to measure an intermediate flap position of
18 degrees. While the flaps were at that angle, I leaned into the cockpit and
marked on the slotted guide plate the position of the lever.
Neville then cut the guide plate in situ to create an intermediate 18 degree detent
notch, which happens to lie approximately halfway along the slot. Thereafter
we set about removing the mono-wheel swing arm, linkage and other unnecessary
components to leave just the lever connected to the flap push-pull rod.
Why Neville specified 18 degrees is something I never questioned, but we use that
intermediate setting for take off on the assumption that it reduces drag while
still augmenting low speed lift. It also occurs to me that if there existed
a graph or table giving different Vfe speeds for various flap settings, then
the Vfe for 18 degrees would be considerably higher than 83 knots; perhaps a
lot closer to 100 knots.
That was a long-winded explanation where I could simply have replied 'as well as'.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502218#502218
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Subject: | US Fly-In Interest? |
With COVID rules relaxing, how about a Europa fly-in / gathering? Were considering
New River Gorge in West Virginia. There are lots of potential activities,
check it out online. Beckley, KBKW is the nearest public airport and there
are nearby hotels. We can try to arrange a block of rooms and a rental vehicle.
Either weekend June 19-20 or June 26-27 are good for us. If interested, reply
here or email america@theeuropaclub.org. Everyone is welcome, club membership
not required.
Jim & Heather
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502227#502227
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Subject: | Re: Airfoil Profiles |
Frans bought a yacht and is sailing around the world last I heard. We
haven't talked since we collaborated on our cooling drag reduction project
years ago.. You can catch him on Twitter from time to time. I believe that
his fairings were provided by Fred if I'm not mistaken. - Paul
On Thu, Jun 3, 2021 at 2:20 AM John Wighton <john@wighton.net> wrote:
>
> When we scanned the Europa we used paint that was washed off afterwards.
> It is commonly used by street artists. An initial attempt without paint
> led to big gaps in the cloud data.
>
> I like the root fairings, they look a bit like Frans Veldman=99s wh
o was
> highly active in Europa modifications. Whatever happened to Frans?
>
> The tape is probably a better idea, as it limits the data - although
> there are some coordinates for the sections along the wing - we used them
> years ago in xfoil.
>
> John W
>
> --------
> John Wighton
> Europa XS trigear G-IPOD
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=502215#502215
>
>
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>
>
Message 6
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Subject: | Re: US Fly-In Interest? |
Sounds like a great idea. 26 27 June would work best for us
William Daniell
LONGPORT
+1 786 878 0246
On Thu, Jun 3, 2021 at 11:45 AM h&jeuropa <butcher43@att.net> wrote:
>
> With COVID rules relaxing, how about a Europa fly-in / gathering? We
=99re
> considering New River Gorge in West Virginia. There are lots of potentia
l
> activities, check it out online. Beckley, KBKW is the nearest public
> airport and there are nearby hotels. We can try to arrange a block of
> rooms and a rental vehicle. Either weekend June 19-20 or June 26-27 are
> good for us. If interested, reply here or email america@theeuropaclub.or
g.
> Everyone is welcome, club membership not required.
>
> Jim & Heather
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=502227#502227
>
>
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>
>
Message 7
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Subject: | Re: Airfoil Profiles |
Thanks Paul, l am not so surprised about the sailing adventure. Frans was very
foreword thinking, it wouldnt surprise me at all if he had a stash of Bitcoin
from Day 1.
We met as he was based near Hoogeveen, l was acting as a delegated signatory for
Fokkers A380 wing assemblies at the time.
His Europa was highly modified, something that surprised me as the Dutch NVAV and
authority ILT seemed pretty hot on the need to grant approvals per Mod.
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502233#502233
Message 8
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Subject: | Re: Flap limiting speed 83 kts exceeded |
JonathanMilbank wrote:
> ...create an intermediate 18 degree detent notch, which happens to lie approximately
halfway along the slot...
>
> Why Neville specified 18 degrees is something I never questioned, ... if ...
different Vfe speeds for varying flap settings, then ... Vfe for 18 degrees would
be considerably higher than 83 knots; perhaps a lot closer to 100 knots.
>
> That was a long-winded explanation where I could simply have replied 'as well
as'.
Yes it was (:-D), but it answers my question, thanks.
Might 18 be the takeoff flap setting for a Trigear? I don't have one but you do
and I guess it's in the Owner's Manual? This might then answer your question
(on Vfe for 18) ... if you read Bud's reply and do some math(s).
HTH
P
G-PLPM
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502236#502236
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