Today's Message Index:
----------------------
1. 12:42 AM - Re: Re: Antenna tuning (Frans Veldman)
2. 05:10 AM - flap drive pin engagement (kees de bussy)
3. 06:40 AM - Re: flap drive pin engagement (david park)
4. 07:35 AM - Re : Portable Europa Cleaning (John Wigney)
5. 07:54 AM - Re: Portable Europa Cleaning (Jeff B)
6. 07:57 AM - Re: Exhaust clearance (Jeff B)
7. 10:05 AM - Re: Antenna tuning (graeme bird)
8. 10:57 AM - Re: cowl cutting - bak edge (graeme bird)
9. 12:38 PM - Re: Re: cowl cutting - bak edge (GRAHAM SINGLETON)
10. 01:26 PM - Re: Re: cowl cutting - bak edge (neveyre@aol.co.uk)
11. 01:26 PM - Re: cowl cutting - bak edge (graeme bird)
12. 04:36 PM - Re: Re: cowl cutting - bak edge (GRAHAM SINGLETON)
Message 1
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| Subject: | Re: Antenna tuning |
On 03/07/2011 02:34 PM, G-IANI wrote:
> I am not a radio expert but from what I have been told the ferrite rings are
> needed for impedance matching (ie they are the balum).
The ferrite rings are not for impedance matching but to convert the
asymmetric signal (one center wire against an outer sleeve) in a
symmetrical one (the two legs of the dipole antenna).
Without such a conversion, the electrons can not really see the
difference between the sleeve of the coax cable and the leg of the
dipole antenna. They get confused, turn the wrong way, and radiate off
the cable instead of radiating from the dipole leg.
In this situation, it is more difficult to obtain a good and stable SWR.
Furthermore, as the sleeve of the coax cable starts radiating, you
induce more interferences in the avionics while transmitting, and
receive more noise from within the ship while receiving.
Ferrite rings are a way to "filter" the electrons. Slow moving electrons
can pass, but electrons in the mood for radiating can not, and can only
stay within the antenna. Be warned though that ferrite rings come in all
kind of flavours, if you pick a random ring from a catalog you will most
likely get one that is not efficient on the VHF frequencies we are using.
There are other ways to obtain the same result. You can coil up the coax
immediately behind the antenna connection, or create a so called
"balun". (Google on "balun" and "dipole" to find the formula how to
create such a contraption).
I have ferrite rings near the antenna connection, AND a coil in the tail
of the ship. I believe that this double measures are needed because it
is impossible to route the coax cable sufficiently far away in a 90
degree angle from the antenna, so it picks up some of the radiation from
the antenna again on the other end of the ferrite rings. The coil
further upstream takes care of this, making sure the cable is completely
"dead" between the radio and the tail of the ship.
As a result, I never have had any interference problems between the
transceiver and the rest of the avionics. Even the three strobes, fed
from a central power supply, have no influence at all at reception.
Frans
Message 2
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| Subject: | flap drive pin engagement |
In my case the flap drive pins engagement comply with the service bulletin on that
matter but at the portside it is at the limit. So I decide the bring it well
within the limits and I purchased the special bearing housing from Europa Aircraft.
I have now a problem to remove the original housing and bearing from the x-tube.
The x-tube end was heated with a hot air gun (air of 600 degr. C / 1110 degr.
F) but I could not get any movement of the bearing housing.
Has anybody experience in removeing the bearing housing from the X-tube ? Any ideas
are welcome.
Kees de Bussy
PH-SBR
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333147#333147
Message 3
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| Subject: | flap drive pin engagement |
Replaced my bearing housings with heat gun=2C and turned bearing with mole
and levered with screwdriver on edge - no problem.
Dave G-LDVO
> Subject: Europa-List: flap drive pin engagement
> From: keesdebussy@hotmail.com
> Date: Tue=2C 8 Mar 2011 05:07:30 -0800
> To: europa-list@matronics.com
>
om>
>
> In my case the flap drive pins engagement comply with the service bulleti
n on that matter but at the portside it is at the limit. So I decide the br
ing it well within the limits and I purchased the special bearing housing f
rom Europa Aircraft.
>
> I have now a problem to remove the original housing and bearing from the
x-tube. The x-tube end was heated with a hot air gun (air of 600 degr. C /
1110 degr. F) but I could not get any movement of the bearing housing.
>
> Has anybody experience in removeing the bearing housing from the X-tube ?
Any ideas are welcome.
>
> Kees de Bussy
> PH-SBR
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=333147#333147
>
>
>
>
>
>
>
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>
>
>
Message 4
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| Subject: | Re : Portable Europa Cleaning |
Hi Troy,
It may not be black this year if they burn the grass a bit earlier??
Anyway, I will be surprised if you do not find heavy dew each morning. I
use a water blade squeegee, see typical example at
http://www.autogeek.net/california-water-blade.html and then towel it
dry. If you want to minimise scratches on the plexiglass, you can always
rinse with water first. However, I use a cockpit cover which keeps the
glass clean. Bruce makes nice covers and I have the plain cockpit
version - good quality.
http://www.aircraftcovers.com/index.php?cPath=1_5_248_249&tplDir=fallback
I will probably go down to SNF a little early as I will be returning on
the Friday.
Cheers, John
N262WF, mono XS, 912S
Mooresville, North Carolina
------------------------------------------------------------------------
ORIGINAL MESSAGE
From: "Troy Maynor"<wingnut54@charter.net>
Subject: Europa-List: Portable Europa Cleaning
Hi All,
I'm getting ready for Sun N Fun. One of the things I wondered about is
what do folks take along to get the black Florida dust off the plane so
it can look its best. One needs to avoid scratching the windscreen and
the paint. Is it just a matter of getting water to it in a jug or is
there a preferred commercial cleaner that can be sprayed? ACS has so
many options it is mind boggling. Any wisdom from those who've done it?
I know this won't be my only question about the trip.
Troy
Message 5
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| Subject: | Re: Portable Europa Cleaning |
Troy,
A bucket of water, squeegee and a rag. No hoses available, so it's the
best we can do. See you there...
Jeff - Baby Blue
On 3/7/2011 7:57 PM, Troy Maynor wrote:
> Hi All,
> I'm getting ready for Sun N Fun. One of the things I wondered about is
> what do folks take along to get the black Florida dust off the plane so
> it can look its best. One needs to avoid scratching the windscreen and
> the paint. Is it just a matter of getting water to it in a jug or is
> there a preferred commercial cleaner that can be sprayed? ACS has so
> many options it is mind boggling. Any wisdom from those who've done it?
> I know this won't be my only question about the trip.
> Troy
>
> *
>
>
> *
Message 6
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| Subject: | Re: Exhaust clearance |
David,
Mine was almost touching the bolt, so I simply dimpled the shield about
1" diameter, and all is well...
Jeff - Baby Blue
On 3/7/2011 5:31 PM, Steade wrote:
> Hi All
> A bit more guidance please . Now I'm fitting the exhaust to my Tri-gear.
> Its the latest oval design. The heat shield on mine is very close to the
> nut on the sump banjo fitting.
> Is this normal? What sort of clearance are other builders getting in
> this area?
> Regards
> David Steade
>
> *
>
>
> *
Message 7
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| Subject: | Re: Antenna tuning |
Thanks for that, I guessed that was the case, I selected toroids that are effective
in the 130Mhz range.
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Build nearing completion
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333182#333182
Message 8
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| Subject: | Re: cowl cutting - bak edge |
thanks Bud, I think I get the drift of most of it, one thing worries me now though
is that you mention a spinner to cowl gap of 1/8th I just don't have enough
cowl to do that, I am going to end up with around 1/2". The top is resting on
the shaft of the 912S prop plate butted up to the back of the prop bolts and
I only have 1/8th of the cowl on the port side to cut off. Is a 3/8th gap going
to matter?
Regards Graeme
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Build nearing completion
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333194#333194
Message 9
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| Subject: | Re: cowl cutting - bak edge |
Not really, but it won't look nice and that will upset you more and more ov
er =0Athe years=0AGraham=0A=0A=0A=0A=0A________________________________=0AF
rom: graeme bird <graeme@gdbmk.co.uk>=0ATo: europa-list@matronics.com=0ASen
t: Tuesday, 8 March, 2011 18:55:01=0ASubject: Europa-List: Re: cowl cutting
dbmk.co.uk>=0A=0Athanks Bud, I think I get the drift of most of it, one thi
ng worries me now =0Athough is that you mention a spinner to cowl gap of 1/
8th I just don't have =0Aenough cowl to do that, I am going to end up with
around 1/2". The top is =0Aresting on the shaft of the 912S prop plate butt
ed up to the back of the prop =0Abolts and I only have 1/8th of the cowl on
the port side to cut off. Is a 3/8th =0Agap going to matter? =0A=0A=0ARega
rds Graeme=0A=0A--------=0AGraeme Bird=0AG-UMPY=0AMono Classic/XS FWFD 912U
LS/Warp drive FP=0ABuild nearing completion=0A=0A=0A=0A=0ARead this topic o
nline here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=333194#33319
======================
Message 10
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| Subject: | Re: cowl cutting - bak edge |
Hi Graeme,
If I read it correctly, you haven't fitted the spinner backplate to the fro
nt face of the engine prop flange yet ? Bolt the spinner backplate on.
The spinner backplate is about 1'' deep, shim that with 3 mixing sticks bet
ween the rear of the spinner backplate to the front of the cowl, there is y
our overlap onto the fuselage !
I use a similar process to Bud, tape the fuselage with masking tape.Mark a
line at the fuselage joggle of the cowl line edge and use a flexi ruler or
similar spline,to mark a line paralell to the joggle line the width of the
ruler aft.
Fit the top cowl with the 3 mix sticks shim between the cowl and back of th
e spinner backplate. Tape the aft edge of the cowl onto the fuselage, check
ing the bottom edge of the cowl is level [ reference the fuselage top / bot
tom join line if still visable, or the top of the footwells] and use the sa
me ruler / spline to transfer the line on the fuselage forward onto the cow
l..... simples !
Cheers,
Nev.
-----Original Message-----
From: graeme bird <graeme@gdbmk.co.uk>
Sent: Tue, 8 Mar 2011 18:58
Subject: Europa-List: Re: cowl cutting - bak edge
thanks Bud, I think I get the drift of most of it, one thing worries me now
hough is that you mention a spinner to cowl gap of 1/8th I just don't have
nough cowl to do that, I am going to end up with around 1/2". The top is
esting on the shaft of the 912S prop plate butted up to the back of the pro
p
olts and I only have 1/8th of the cowl on the port side to cut off. Is a 3/
8th
ap going to matter?
Regards Graeme
--------
raeme Bird
-UMPY
ono Classic/XS FWFD 912ULS/Warp drive FP
uild nearing completion
ead this topic online here:
http://forums.matronics.com/viewtopic.php?p=333194#333194
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Message 11
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| Subject: | Re: cowl cutting - bak edge |
Graham, checking again I am compliant with the 1" back from the front of the flange
as it says in the manual, so it must be the spinner that doesnt come back
enough.
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Build nearing completion
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=333250#333250
Message 12
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| Subject: | Re: cowl cutting - bak edge |
Graem=0Alooks like Nev has your answer=0AGraham=0A=0A=0A=0A=0A_____________
___________________=0AFrom: graeme bird <graeme@gdbmk.co.uk>=0ATo: europa-l
ist@matronics.com=0ASent: Tuesday, 8 March, 2011 21:23:00=0ASubject: Europa
"graeme bird" <graeme@gdbmk.co.uk>=0A=0AGraham, checking again I am complia
nt with the 1" back from the front of the =0Aflange as it says in the manua
l, so it must be the spinner that doesnt come back =0Aenough.=0A=0A--------
=0AGraeme Bird=0AG-UMPY=0AMono Classic/XS FWFD 912ULS/Warp drive FP=0ABuild
nearing completion=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://
forums.matronics.com/viewtopic.php?p=333250#333250=0A=0A=0A=0A=0A=0A=0A
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