Today's Message Index:
----------------------
1. 04:56 AM - Re: Key Sanding................and Instrument Panel ventilation (John Wighton)
2. 07:17 AM - Re: Europa-List Digest: 1 Msgs - 05/29/14 (Gary Leinberger)
3. 08:07 AM - antennas (David Joyce)
4. 08:51 AM - Re: antennas (rparigoris)
5. 09:33 AM - Re: Key Sanding................and Instrument Panel ventilation (Fred Klein)
6. 09:59 AM - Re: Key Sanding................and Instrument Panel ventilation (spcialeffects)
7. 10:44 AM - Re: antennas (Frans Veldman)
8. 02:03 PM - Re: antennas (david park)
9. 02:06 PM - |Arblast Propellar Spinner (Alan Carter)
10. 03:17 PM - Castle Kennedy fly in (KENNETH ATKINSON)
11. 04:00 PM - Re: Re: Key Sanding................and Instrument Panel ventilation (Tony Renshaw)
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Subject: | Re: Key Sanding................and Instrument Panel ventilation |
Tony,
Not sure on where the surface area discussion is going - or the objective.
Regarding the panel, l installed 2off fans in a carbon frame above the 6 pack/EFIS
hybrid panel in G-IPOD. This is the highest point hence hot air will collect
here. It performs the de-mist function in the cockpit (no other heater is
fitted).
I can send some pics if needed.
Regards
John
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424022#424022
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Subject: | RE: Europa-List Digest: 1 Msgs - 05/29/14 |
I have two fans on my panel - both in front of the pilot on top, about 4 inches
in from the windshield. I need the cooling as I have a full IFR panel, with a
Garmin 430 W that puts out more heat than my college year's Morgan (sport car)
heater ever did (one would think by owning a Morgan one would learn from that
about English engineering - I must be infected with something to build an English
airplane) . I also have a temperature controlled thermostat with a timer
so that on landing the fans run for up to 45 minutes after turning off the engine
(I have a secondary battery and buss to run my backup attitude indicator
and soaring buss). In the winter the fans also de-mist the windshield. It is
important to have openings in the bottom so air can be drawn in. I realize the
bottom of the panel doesn't fit that well but be sure you have sufficient area
to allow air in. I also have a fan that has tubing blowing directly into the
Garmin 430, 330 transponder and GRT HX EFIS. (Yes, I know - it is heavy but I
think the real weight problem comes from the Jacuzzi in the back bay. And the
A/C doesn't help.) (Just joking about the A/C and Jacuzzi.) By the way, despite
all the IFR stuff and added weight I get 136 kts flat out at 1000 feet, which
may be due in part to the high top which seems to make it faster than normal
Europas despite more frontal area.
Gary Leinberger
N388SG
Lancaster, Pa. USA
________________________________________
From: owner-europa-list-server@matronics.com [owner-europa-list-server@matronics.com]
on behalf of Europa-List Digest Server [europa-list@matronics.com]
Sent: Friday, May 30, 2014 3:02 AM
Subject: Europa-List Digest: 1 Msgs - 05/29/14
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Total Messages Posted Thu 05/29/14: 1
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Today's Message Index:
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1. 10:24 PM - Key Sanding................and Instrument Panel ventilation
(Tony Renshaw)
________________________________ Message 1 _____________________________________
Time: 10:24:06 PM PST US
From: Tony Renshaw <tonyrenshaw268@gmail.com>
Subject: Europa-List: Key Sanding................and Instrument Panel ventilation
Gidday,
I want to air a hypothesis that key sanding does NOT matter what grade of paper,
so long as you dull it off. The premise is that by roughening you are removing
the gloss, and increasing the surface area. I am aware that the heavier the
grade of paper you use, the more likely you are to damage the glass fibres within
the matrix. So, I dont want advice on Grade of paper, but I do want to ask
whether people think that this could be true:
I believe there is a likelihood that whether you use 240 Grit paper, or 60 Grit
paper, that the substrate will increase in surface area by the same amount.
Thats my debate.
I also believe there is a likelihood that the amount will be twice the surface
area, but I dont know how to mathematically prove it, however Id like it explained
in simple terms, what the actual formula is in someone elses view. In fact
Ill go a step further and hypothesise that it is
1/2 surface area of a circle MINUS the are of the diameter of a similar radius
circle.
Im going to retract double, and reckon it is closer to a 50 % increase.
Any takers? Anyone had enough red wine to give this consideration? There might
be two guys out there in the Cottswalds, but they will probably just argue between
themselves, so I thought Id air it to the greater Europa community.
Regards
Tony Renshaw
P.S. I have an instrument panel fan, a computer fan, and I am wondering where would
be the most advised place to put it? I am thinking midway between the main
panel and the radio stack, behind the mono wheel gear retraction handle rebate,
on the RHS. Whatdoyareckon?
Message 3
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I would be grateful if one of you experts in radio matters
could tell me whether one can add a couple of metres of
good quality coax cable to distance the stub antenna of a
hand held Icom transceiver from the radio, positioning the
stub aerial on top of the fuselage behind the pilot,
without mucking up its function. I hasten to add that this
is not for my Europa but for a Build a Plane project I am
involved in which will rely on an Icom, but which picks up
a load of ignition noise if positioned on the panel, just
behind the engine.
Regards, David Joyce, G-XSDJ
Message 4
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Hi David
The rubber duckie antenna is not all that good of an antenna. I have fooled with
extending mine aft on the Europa and reception on the ground and performance
was poor at best, no worst than when it was directly on the unit.
A better solution for me was AAE and Balsa. It ends up weighing under 4 oz. and
works about 70% as well for both VOR and Communication.
http://www.europaowners.org/main.php?g2_itemId=31216
Ron Parigoris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424045#424045
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Subject: | Re: Key Sanding................and Instrument Panel ventilation |
On May 29, 2014, at 10:23 PM, Tony Renshaw <tonyrenshaw268@gmail.com>
wrote:
> =93 I believe there is a likelihood that whether you use 240 Grit
paper, or 60 Grit paper, that the substrate will increase in surface
area by the same amount=94.
> Any takers? Anyone had enough red wine to give this consideration?
=85too early in the morning for the wine=85intuitively, as I
imagine a field of a given size covered w/ hemispheres=85an
approximation of grit paper...as I imagine the surface area of the
hemispheres as the hemispheres diminish in size=85I cannot escape the
conclusion that the total surface area will increase in inverse
proportion to the diameter of the hemispheres=85
=85nonetheless=85I can think of better reasons to avoid 60 grit
when key sanding=85
> P.S. I have an instrument panel fan, a computer fan, and I am
wondering where would be the most advised place to put it? I am thinking
midway between the main panel and the radio stack, behind the mono wheel
gear retraction handle rebate, on the RHS. Whatdoyareckon?
I reckon putting in 3 those 120 mm computer fans @ $10 each were
the was easiest decision I=92ve had to make regarding my panel=85I=92m
uncertain at this time whether or not I=92ll use the little louvered
vents intended to direct airflow towards the windscreen.
F.
Message 6
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Subject: | Re: Key Sanding................and Instrument Panel ventilation |
Hi john, I'd be interested in seeing a few pics please. Thanks Frank
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424054#424054
Message 7
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 05/30/2014 05:06 PM, David Joyce wrote:
> I would be grateful if one of you experts in radio matters could
> tell me whether one can add a couple of metres of good quality coax
> cable to distance the stub antenna of a hand held Icom transceiver
> from the radio, positioning the stub aerial on top of the fuselage
> behind the pilot, without mucking up its function.
Yes you can do that, provided you create some artificial ground at the
antenna connector (unless the airplane is made of metal). On the
radio, the radio itself plus the person holding the radio are some
kind of ground, but if you relocate the antenna you need something
below the antenna to take over that function. (If you don't, the outer
shield of the coax will take over that function, but this is probably
not what you want).
Note that the stub antenna of the hand held radio has less performance
than a full quarter wave antenna. (Inside this stub antenna you will
find a coil; it is still a quarter wave antenna but most of the length
has been coiled up and doesn't radiate as much anymore.)
Frans
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=/4la
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Message 8
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I used a 4 or 5 foot extension intended for a GPS Antenna which ends up with with
a window sucker plugged in to Icom one end and the Icom Antenna plugged in
the window sucker end. Works perfectly used as stand by com.
Dave
Sent from my iPhone
> On 30 May 2014, at 18:47, "Frans Veldman" <frans@privatepilots.nl> wrote:
>
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>> On 05/30/2014 05:06 PM, David Joyce wrote:
>>
>> I would be grateful if one of you experts in radio matters could
>> tell me whether one can add a couple of metres of good quality coax
>> cable to distance the stub antenna of a hand held Icom transceiver
>> from the radio, positioning the stub aerial on top of the fuselage
>> behind the pilot, without mucking up its function.
>
> Yes you can do that, provided you create some artificial ground at the
> antenna connector (unless the airplane is made of metal). On the
> radio, the radio itself plus the person holding the radio are some
> kind of ground, but if you relocate the antenna you need something
> below the antenna to take over that function. (If you don't, the outer
> shield of the coax will take over that function, but this is probably
> not what you want).
> Note that the stub antenna of the hand held radio has less performance
> than a full quarter wave antenna. (Inside this stub antenna you will
> find a coil; it is still a quarter wave antenna but most of the length
> has been coiled up and doesn't radiate as much anymore.)
>
> Frans
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2.0.22 (GNU/Linux)
>
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> =/4la
> -----END PGP SIGNATURE-----
>
>
>
>
Message 9
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Subject: | |Arblast Propellar Spinner |
Hi All.
Just had my permit done, the only maintenance I can see is to grease the lead screw.
However my spinner rotates un-evenly, i can only put the spinner on the same way
round as the screws only line up that way.
I have checked the rear back plate which is only about a mm out of true,
I note there is another circular plate in front of the prop,
but this plate does not attach to the spinner, at this same position on the spinner
there is a row of screws ie imitation not used,
They are just forward of the plate mentioned above, i was wondering if this is
normal or should the screws be attached to this forward plate.
The spinner plates seem to be made of thin aluminium backed with fibre glass to
give it strength, the spinner is also thin fibre glass about 14 or 15" in length.
The screws i have mentioned are forward of the plate so no means of fixing them
to the plate, its the rear screws only that hold the spinner on.
Regards.
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424069#424069
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Subject: | Castle Kennedy fly in |
Hi, =0A----- Sorry this is a bit late.=0A------Are th
ere any other Europas likely to attend Castle Kennedy Fly-in tomorrow.=0A
----- I am flying in in the morning.=0A---=0A-- I thoro
ughly enjoyed it last year-good food,lots of aircraft,model flying,nice cas
tle to visit -see website!=0A-- =0A-- Ken-- G-CEKV
Message 11
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Subject: | Re: Key Sanding................and Instrument Panel ventilation |
Hi John,
Re Key Sanding, I suppose the purpose is to legitimise why we do it, and its because
Ive been doing work on the very thin sandwich skin of the fuselage. The
cloth in question is so thin, and I believe any strong Grit will compromise the
structure, so it got me thinking about what the goal really is. I reckon the
goal is to abrade the matrix resin, without compromising or ideally even touching
the entrapped glass, and in essence increasing the surface area in the process.
I then wondered academically whether there was any difference in the surface
area between one Grit and another, and I dont believe there is, SO, when
key sanding, any grit will do if it roughens the surface and dulls it off. Thats
all, just an academic exercise, but I know there are smarter guys than me
on the list, so I asked.
re: Instrument Panel Venting, I have kindly been sent a few photos but am always
desiring seeing how others have done things, so yes, Id love to get some photos.
Thanks John.
Regards
Tony Renshaw
On 30 May 2014, at 9:55 pm, John Wighton <john@wighton.net> wrote:
>
> Tony,
>
> Not sure on where the surface area discussion is going - or the objective.
>
> Regarding the panel, l installed 2off fans in a carbon frame above the 6 pack/EFIS
hybrid panel in G-IPOD. This is the highest point hence hot air will collect
here. It performs the de-mist function in the cockpit (no other heater
is fitted).
>
> I can send some pics if needed.
>
> Regards
> John
>
> --------
> John Wighton
> Europa XS trigear G-IPOD
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=424022#424022
>
>
>
>
>
>
>
>
>
>
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