Today's Message Index:
----------------------
1. 02:48 AM - Rotax Preheat update pleae (Remi Guerner)
2. 04:21 AM - Re: Elevator Trim Tab slot. (danbish)
3. 05:05 AM - Re: Elevator Trim Tab slot. (danbish)
4. 06:03 AM - Re: Rotax Preheat update pleae (rampil)
5. 06:06 AM - AW: Elevator Trim Tab slot. (UVTReith)
6. 06:28 AM - Re: Rotax Preheat update pleae (rampil)
7. 11:32 AM - Re: Elevator Trim Tab slot. Note from the Company!!! (ALAN YERLY)
8. 11:48 AM - Message for Gilles Thesee (Paul McAllister)
9. 02:36 PM - Need Redux? I need a couple more orders! (ALAN YERLY)
10. 02:56 PM - Re: Re: AAE Antennas (Tim Houlihan)
11. 03:15 PM - Re: Re: AAE Antennas (Mike Parkin)
Message 1
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| Subject: | Rotax Preheat update pleae |
For those having the optional Rotax air guide around the cylinders and
the third round air intake in the cowling as specified by Europa for the
912S, one solution is to preheat with an hair dryer plugged into the air
intake. I have been doing that for two years and it works really great.
With a 2000 Watt hair dryer, CHT and oil temp probes both show a 1
degree Celsius (about 2 F) per minute increase. The whole engine block
is being heated by the hot air forced around the cylinders. However the
oil tank itself is only slightly heated by the warm air inside the
cowling. Using this preheat process the engine starts like in summer all
the time.
Remi Guerner
F-PGKL
Hi Guys,
Its been two years since preheaters have been discussed here.
Paul, Are you still happy with the Reiff?
Anybody else happy or unhappy?
Any new data on the JC Whitney variant?? Has someone found
an auto parts equivalent to the oil tank band heater and its
thermostat??
It's 16F here today (brrrrrrrr, shiverrrrrrr) but bright VFR
--------
Ira N224XS
Message 2
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| Subject: | Re: Elevator Trim Tab slot. |
I did a mod that I copied from Steve D. It's basically a way of both keeping out
rain and also providing the guide for the T bar as it travels vertically. I
thought I had some pics but can't seem to locate them. I'll post something later
today.
Dan
Visit - www.EuropaOwners.org
Message 3
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| Subject: | Re: Elevator Trim Tab slot. |
Actually, I got busy this morning and put the photos up already. Let me know if
you have any questions.
Click (or cut and paste) here:
http://www.europaowners.org/modules.php?set_albumName=T-Bar-Slot-Mod&op=modload&name=gallery&file=index&include=view_album.php
Dan
Visit - www.EuropaOwners.org
Message 4
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| Subject: | Re: Rotax Preheat update pleae |
Hi Guys,
Thank you all for the feedback!!! 8)
I have been doing some searching around and found that the
Reiff block heating element is apparently the "Kat's Universal Silicone
Hot pad". These are widely available in the US for about $20 (Amazon,
Napa Auto, Autozone, but not Pep Boys).
I am still looking for a band type element for the oil tank, although
another possibility is to us a 25-50 watt Kat's hot pad on the oil tank
since the pads are flexible down to 1" radius. (no compound curves)
I am also looking for thermostatic elements that can be mounted inline
on the 120VAC and attached to the block and tank.
I take it from the absence of comments that the block pad's location
just above the muffler's aluminum heat shield is not an issue.
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=226845#226845
Message 5
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| Subject: | Elevator Trim Tab slot. |
Woh, Dan
That's looks complicated and it seems to me that there will be still a
lot
of drag.
Why not just using the brush side (inner part) of a door seal or
similar?
Just cut it in lengths and clue it on both inner sides of the fuselage
to
seal the T-bar rod ends.
This is cheap, clean and the weight is nearly nothing.
Have a nice day,
Bruno
-----Urspr=FCngliche Nachricht-----
Von: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] Im Auftrag von danbish
Gesendet: Montag, 26. Januar 2009 14:04
An: europa-list@matronics.com
Betreff: Re: Europa-List: Elevator Trim Tab slot.
Actually, I got busy this morning and put the photos up already. Let me
know
if you have any questions.
Click (or cut and paste) here:
http://www.europaowners.org/modules.php?set_albumName=T-Bar-Slot-Mod&op
=modl
oad&name=gallery&file=index&include=view_album.php
Dan
Visit - www.EuropaOwners.org
Message 6
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| Subject: | Re: Rotax Preheat update pleae |
Greetings All,
I just found an (the?) OEM for the heating pads
www.minco.com
They have an excellent engineering guide at:
http://www.minco.com/uploadedFiles/Products/HDG01_KL6_final.pdf
BTW: The silicone pads have an upper temperature rating of 455F
and can be affixed with many different adhesives including RTV#6
and Epoxy (JB Weld)
Minco also carries small thermostat elements as well
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=226852#226852
Message 7
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| Subject: | Re: Elevator Trim Tab slot. Note from the Company!!! |
Dan, Bruno and others,
The standing rule in aviation is all flight controls should be made to
be absolutely free from binding or potential binding. The trim T bar
for which the slot is made has a rather long moment arm, and any drag in
this area will bind/restrict/degrade stabilator control. Chapter 19
step 9 indicates the rigging de-rigging aid of two pieces of ply with a
3/4 inch gap doesn't seem elegant, but it is functional, easy to remove
for access in the event of damage or a new antenna idea. Dan and Steve
have just gilded the lily on what the book says. By adding another
access hole in the side of the aircraft you can still get access. If I
recall, Steve's allows removal of the trim T bar if necessary.
>From the building side, keep in mind the 40 hour projects to dress up a
virtually hidden slot could be spent on finishing the aircraft sooner.
>From the flying standpoint, one should not mess with the gap with any
means which would restrict trim tab control movement. I once flew a
Europa with slightly binding bushings and I couldn't figure out why it
didn't trim quite right and in the flare, when I eased back pressure the
plane would not correct back and needed slight forward pressure. Too
much if I recall was added. Thank God for tough landing gear. It was
drag in the system. Drag on the trim T bar from rubber gap sealing
strips would be even more interesting. Your pitch dampening will be
affected at a minimum as the stab will be slightly fixed from drag, and
the tiny amount of slop in the T bar system will change the tab induced
correction.
As Roger Bull from Europa once said:
"Under no circumstances should any attempt be made to close or otherwise
restrict the trim tab slot. Possible snags include icing, physical
fouling, and changes to the aerodynamics.
This latter is important since all the test flying to optimize handling
was carried out with the slot open. The airflow in this area was subject
to considerable experimentation, as it was shown to be necessary to fit
the flettner strip to achieve satisfactory elevator control, and any
change to this setup has not been shown to be safe."
So be conservative. Make nice even slots and fill the foam edges, sand
smooth and fill, fill, fill until nice.
Just my thoughts,
Bud
----- Original Message -----
From: UVTReith<mailto:uvtreith@t-online.de>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Monday, January 26, 2009 8:58 AM
Subject: AW: Europa-List: Elevator Trim Tab slot.
Woh, Dan
That's looks complicated and it seems to me that there will be still a
lot of drag.
Why not just using the brush side (inner part) of a door seal or
similar? Just cut it in lengths and clue it on both inner sides of the
fuselage to seal the T-bar rod ends.
This is cheap, clean and the weight is nearly nothing.
Have a nice day,
Bruno
-----Urspr=FCngliche Nachricht-----
Von: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] Im Auftrag von danbish
Gesendet: Montag, 26. Januar 2009 14:04
An: europa-list@matronics.com
Betreff: Re: Europa-List: Elevator Trim Tab slot.
Actually, I got busy this morning and put the photos up already. Let
me know if you have any questions.
Click (or cut and paste) here:
http://www.europaowners.org/modules.php?set_albumName=T-Bar-Slot-Mod&op
=modload&name=gallery&file=index&include=view_album.php
Dan
Visit - www.EuropaOwners.org
http://www.matronics.com/Navigator?Europa-List<http://www.matronics.com/N
avigator?Europa-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 8
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| Subject: | Message for Gilles Thesee |
Hi Gilles,
I sent you a note to Gilles.Thesee@ac-grenoble.fr but it bounced. If
you pick this message up on the forum, could you contact me and let me
know your new email address.
Thanks, Paul
Message 9
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| Subject: | Need Redux? I need a couple more orders! |
OK,
If you need Redux let me know ASAP. I have three firm orders and need a
couple more to get into a new batch order.
Email me your needs. Price should be about $260-280 including shipping.
Bud Yerly
Custom Flight Creations
Message 10
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| Subject: | Re: AAE Antennas |
TELEDYNMCS@aol.com wrote:
> With this in mind, and coupled with skin effect, which is the tendency
> for weak signals to pass around your body rather than through
> it because your body is made up primarily of water, you are in no
> danger of ill effects from a cell phone's non-ionizing radiation, even
> when held next to your head. Remember, it takes 600-1000 watts of
> highly concentrated microwave energy to pop a bag of popcorn or
> defrost tonight's roast for dinner. Your cell phone radiates
> omni-directionally, so only a small portion of the weak signal being
> transmitted is directed towards your head when in use. Skin effect
> causes that weak signal to pass around, not into, your head.
>
> Transponder antennae, on the other hand, in close proximity,
> say closer than two wave lengths, do, IMHO, pose a significant RF
> hazard when the exposure occurs repeatedly over a long period of time,
> even with the short burst duration. This is particularly true for
> those of us, like myself, who are routinely exposed to high levels of
> RF. While the nominal power output of a typical transponder is around
> 250 watts, peak power is usually rated in the two kilowatt range and
> this does not take into account the gain of the antenna. Granted,
> these are indeed short bursts, but why expose yourself to this power
> level unnecessarily, even for short bursts? (unless of course, you are
> beyond child bearing years or have no desire to father children) If
> you keep the transponder antenna at least two wave lengths away from
> your body roughly 96% of the energy is dissipated within this
> distance. Skin effect takes care of the rest.
Hi John
Thanks for you very informative reply I was obviously wrong in assuming
that cell phones are like real phones and carried two way conversations,
but your description does explain those missing bits of the
conversation. As I said before, my limited expertise was, 35 years ago,
as an R.A.F. Airborne radar technician with a specialist radar
countermeasures squadron. I do know how to change the SIM card and
charge the battery of a Cell phone but that's the limit of my knowledge.
Modern electronic devices are simply magic to me.
I feel I have to correct you when you state that the peak power is in
the 2 Kilowatt range. I have checked a couple of spec sheets and to
confirm things I phoned a major transponder manufacturer just to make
sure. Most transponders have a peak power of up to 250 watts not two
Kilowatts.
For example the Trig TT21 has a mean power of less than two watts with a
peak power of 140 watts at the unit connector. I am told that the duty
cycle is less than 1 percent.
The worse one I saw had an input power of 27 watts total with a peak
power of 250 watts. but none I saw had a peak power of more than 250
watts. Remember this secondary not primary radar and the radiated power
requirements are dramatically reduced
I think the comments about child bearing and fatherhood are difficult to
justify at these low powers though at my age with children in their
middle 30's this should not be a major issue for me !
The transponder aerial is Omni directional so as you say only a small
portion of the energy is directed at you, even less than with a cell
phone held to your ear.
In a Europa, if the aerial is behind the baggage bay ( and the fuel
tank) then it is more than likely greater than two wavelengths or 60cms
(23") away from the crew.
Having said all that, I agree with you that we should try and reduce the
risks its just that in the amateur built aircraft arena I think the
risks from the transponder is well down the list of things to get
excited about.
Tim Houlihan
G-BZTH
Message 11
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| Subject: | Re: AAE Antennas |
Hey Guys,
I just love all this technical stuff. As the Ad says 'here comes the
science bit'.
Regards,
Mike
Do not archive
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Tim Houlihan
Sent: 26 January 2009 22:53
Subject: Re: Europa-List: Re: AAE Antennas
TELEDYNMCS@aol.com wrote:
> With this in mind, and coupled with skin effect, which is the tendency
> for weak signals to pass around your body rather than through
> it because your body is made up primarily of water, you are in no
> danger of ill effects from a cell phone's non-ionizing radiation, even
> when held next to your head. Remember, it takes 600-1000 watts of
> highly concentrated microwave energy to pop a bag of popcorn or
> defrost tonight's roast for dinner. Your cell phone radiates
> omni-directionally, so only a small portion of the weak signal being
> transmitted is directed towards your head when in use. Skin effect
> causes that weak signal to pass around, not into, your head.
>
> Transponder antennae, on the other hand, in close proximity,
> say closer than two wave lengths, do, IMHO, pose a significant RF
> hazard when the exposure occurs repeatedly over a long period of time,
> even with the short burst duration. This is particularly true for
> those of us, like myself, who are routinely exposed to high levels of
> RF. While the nominal power output of a typical transponder is around
> 250 watts, peak power is usually rated in the two kilowatt range and
> this does not take into account the gain of the antenna. Granted,
> these are indeed short bursts, but why expose yourself to this power
> level unnecessarily, even for short bursts? (unless of course, you are
> beyond child bearing years or have no desire to father children) If
> you keep the transponder antenna at least two wave lengths away from
> your body roughly 96% of the energy is dissipated within this
> distance. Skin effect takes care of the rest.
Hi John
Thanks for you very informative reply I was obviously wrong in assuming
that cell phones are like real phones and carried two way conversations,
but your description does explain those missing bits of the
conversation. As I said before, my limited expertise was, 35 years ago,
as an R.A.F. Airborne radar technician with a specialist radar
countermeasures squadron. I do know how to change the SIM card and
charge the battery of a Cell phone but that's the limit of my knowledge.
Modern electronic devices are simply magic to me.
I feel I have to correct you when you state that the peak power is in
the 2 Kilowatt range. I have checked a couple of spec sheets and to
confirm things I phoned a major transponder manufacturer just to make
sure. Most transponders have a peak power of up to 250 watts not two
Kilowatts.
For example the Trig TT21 has a mean power of less than two watts with a
peak power of 140 watts at the unit connector. I am told that the duty
cycle is less than 1 percent.
The worse one I saw had an input power of 27 watts total with a peak
power of 250 watts. but none I saw had a peak power of more than 250
watts. Remember this secondary not primary radar and the radiated power
requirements are dramatically reduced
I think the comments about child bearing and fatherhood are difficult to
justify at these low powers though at my age with children in their
middle 30's this should not be a major issue for me !
The transponder aerial is Omni directional so as you say only a small
portion of the energy is directed at you, even less than with a cell
phone held to your ear.
In a Europa, if the aerial is behind the baggage bay ( and the fuel
tank) then it is more than likely greater than two wavelengths or 60cms
(23") away from the crew.
Having said all that, I agree with you that we should try and reduce the
risks its just that in the amateur built aircraft arena I think the
risks from the transponder is well down the list of things to get
excited about.
Tim Houlihan
G-BZTH
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