Today's Message Index:
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1. 01:06 AM - Re: Re: Takeoff technique and runway minima (trigear) (Brian Davies)
2. 03:18 AM - Re: Takeoff technique and runway minima (trigear) (rampil)
3. 08:19 AM - Fuel Tank Treatments (Jeremy Fisher)
4. 10:54 PM - Re: tri gear kit for sale (danbish99)
5. 10:54 PM - Re: tri gear kit for sale (danbish99)
6. 11:15 PM - Re: Fly out Caernarfon Sat 8 Aug (Steven Pitt)
7. 11:28 PM - Re: Re: tri gear kit for sale (GRAHAM SINGLETON)
Message 1
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| Subject: | Re: Takeoff technique and runway minima (trigear) |
Hi Ira,
In the more regulated UK world I suspect Europa did quite a bit of flight
testing to arrive at the take off flap setting of 18 deg. quoted in the
section 5 of their Owners Manual. Regarding CFD I know that the current
Europa (Swift) had a bit of trouble getting the Europa form into their
computer as some of it was originally designed and built using Nigel
Graham's CAD system ( Cardboard Aided Design).
Regards
Brian Davies
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of rampil
Sent: 09 August 2015 02:09
Subject: Europa-List: Re: Takeoff technique and runway minima (trigear)
Hi Richard,
Yes.
When I was based at latitude 41N and had a 4500 concrete runway at sea
level, I never used flaps for T/O. Never had a performance issue, but I will
admit to not carefully collecting flight test data on take off run. Sadly,
my BlueMountain data logging feature was discontinued in my G4 making new
collection more onerous.
At latitude 33 where the average temp feels 20F warmer, more humid, and
starting at 900' AGL, my habit is to use a small amount of flap on my grass
strip. Recall that with our flaps, lift increases in the early part of
travel and less in the late travel whereas drag increases mostly in the late
travel. Without flight test and therefore only my opinion/experience
5 - 10 of flaps increases lift (and minimally at t/o speed, induced drag)
and minimally increases form drag. Perhaps at half flap the lift is maxed
out without too much extra drag, I would think at 19 you are getting more
drag without much more lift. My strip is far too rough to take careful
measurements, but perhaps Europa could try a wee bit of CFD since they have
the form data and the software.
Cheers,
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445712#445712
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Message 2
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| Subject: | Re: Takeoff technique and runway minima (trigear) |
Hi Brian,
Interesting!
The reason I suggested CFD was that I had been told that one of the
first things David did on acquiring Europa was to obtain a high res 3D
laser scan model for CFD (and manufacturing).
As for my use of less flaps, that was based on my initial 40 hr flight
test program at KZPH in 2004. ZPH has long paved runways near SL.
Acceleration to 50 kt was faster with minimal flaps selected than half flaps.
This may have been impacted by my C.G. being rather forward and, having
just moved my main battery to the rear fuselage, I will reexamine the issue.
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445721#445721
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| Subject: | Fuel Tank Treatments |
I am looking for advice on whether and how to treat my fuel tank. I
inherited a project, which had been in build for no less than 17 years!
As a result, I am fairly sure that it has one of the early fuel tanks,
which I believe can have problems with ethanol fuel and delaminating or
cracking. I am thinking of treating it before it is filled for the
first time by brushing on a couple of coats of Jeffco 9700 or similar
through the access hole in the top of the tank; I have experience with
the Jeffco from my Lancair build. It is really expensive and a pain to
put on, but worth it if it stops future problems.
Has anyone tried this, or any similar treatment? I would really
appreciate any inputs.
Jerry Fisher
Message 4
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| Subject: | Re: tri gear kit for sale |
Hi Howard- - was thinking of selling my project due to not being able to get insurance
on a monowheel here in the states. I love the dang monowheel and can't
imagine going tri but it's either that or quit altogether. How much is the tri
kit?
Thanks,
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445750#445750
Message 5
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| Subject: | Re: tri gear kit for sale |
Hi Howard- - was thinking of selling my project due to not being able to get insurance
on a monowheel here in the states. I love the dang monowheel and can't
imagine going tri but it's either that or quit altogether. How much is the tri
kit?
Thanks,
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445751#445751
Message 6
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| Subject: | Re: Fly out Caernarfon Sat 8 Aug |
Dave,
Good to see you at Caernarfon if only in passing. I take it you did not
count the Liberty amongst the Europas present!! ;-)
Sorry that our (events) leader was unable to attend due to a broken
turbo - hope you managed to get it fixed David.
Excellent day out and great to have an opportunity to fly in the Liberty
and compare the two stable mates - thanks Ray.
Best wishes and here is to more Doths in the months to come.
Steve Pitt
G-SMDH (still in the workshop but getting there)
----- Original Message -----
From: david park
To: europa-list@matronics.com
Sent: Saturday, August 08, 2015 11:28 PM
Subject: Re: Europa-List: Fly out Caernarfon Sat 8 Aug
Perfect Wx for Caernarfon, nice trip from Sleap but had to leave early
to visit family member in hospital.
4 Europas there.
Regards Dave Park
Sent from my iPhone
On 5 Aug 2015, at 11:09, davidjoyce@doctors.org.uk wrote:
Just a reminder that we have a joint Europa Club/Gloster Strut fly
out to Caernarfon this Saturday. The forecast is currently looking very
good, with a bit of high pressure, clear skies and modest winds.
Briefing sheet attached Regards, David Joyce, GXSDJ
<Caernarfon 2015.doc>
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Message 7
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| Subject: | Re: tri gear kit for sale |
What about converting it to a taildragger, then you have directional brakin
g?Graham
On Monday, 10 August 2015, 6:55, danbish99 <bdanbish@gmail.com> wrote:
Hi Howard- - was thinking of selling my project due to not being able to ge
t insurance on a monowheel here in the states. I love the dang monowheel an
d can't imagine going tri but it's either that or quit altogether. How much
is the tri kit?
Thanks,
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445751#445751
S -
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=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
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