Today's Message Index:
----------------------
1. 01:56 AM - Re: SL30 Installation help (Frans Veldman)
2. 03:32 AM - Re: SL30 Installation help (Paul McAllister)
3. 04:44 AM - Re: Teflon & Steel Pin Hinge: LAA Mod? (h&jeuropa)
4. 08:03 AM - SV: Re: Teflon & Steel Pin Hinge: LAA Mod? (Sidsel & Svein Johnsen)
5. 09:22 AM - Re: Re: Teflon & Steel Pin Hinge: LAA Mod? (Rick Sivier)
6. 10:54 AM - Re: Teflon & Steel Pin Hinge: LAA Mod? (G-IANI)
7. 01:14 PM - Re: Teflon & Steel Pin Hinge: LAA Mod? (Kelvin Weston)
8. 05:24 PM - Negative "G" (keith hickling)
9. 08:23 PM - iPad aviation apps (Fred Klein)
Message 1
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Subject: | Re: SL30 Installation help |
On 07/30/2010 08:26 PM, John Wighton wrote:
>
> Hell everyone, I am installing a Garmin SL30 into G-IPOD and wish to
> know the best place for the NAV antenna. It's a tri-gear and l have
> the standard fin mounted COMM antenna.
I have built the NAV antenna for my Garmin SL30 into the belly of the
airplane. There is a picture of this in my build log
www.privatepilots.nl/europa/building.htm
I decided to mount the antenna on the floor, because I have the strobe
power supply mounted against the roof. This provides better routing of
the cables (I could wire the wing tip strobes and tail strobe
symmetrically so the noise spikes null themselves out) and in case of a
fuel leak the strobe unit doesn't ignite the fuel as easily.
Another reason to mount the antenna on the floor is that there is simply
more space there for an antenna.
The NAV antenna works very well in this position. Sensitivity is
omni-directional, and I have no signs of strobe or other noises leaking
into the NAV system. The anntenna consists of two aluminium tubes in a
V-shape and I tuned them to the proper frequency. The coax is coiled up
close to the antenna to work as a balun.
Don't believe marketing stories, a simple V-shaped dipole is the best
you can get in terms of efficiency and radiation pattern. It is mainly
omni-directional, with a slight favor for the forward position, which is
probably the best for our purposes.
Don't worry about the engine "shadowing out" the antenna, the engine is
smaller than the wavelength and has little influence on the reception of
the signal. Apart from that, I believe that the NAV signals are
transmitted off the ground, so the engine is simply above the "line of
sight" of the antenna. ;-)
Frans
Message 2
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Subject: | Re: SL30 Installation help |
Hi Frans,
I had my antenna mounted on the floor but I ended up relocating it to the
roof. While I found that the VOR and Localizer worked fine I seemed to have
trouble getting the Glideslope to work until I was with in a few NM of the
outer marker. It seems to work better on the roof for me.
Paul
Message 3
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Subject: | Re: Teflon & Steel Pin Hinge: LAA Mod? |
Richard,
Check out this link for an alternative to the teflon and stainless steel repair. www.n91cz.com See part way down the page under Hinge Play.
Basically he found that the teflon repair failed in a short time too. So he reams
the hinges to remove the burrs and replaces the pin with close tolerance welding
rod. We've made the reamer and have the wire but haven't actually made
the repair yet.
Jim & Heather
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=307157#307157
Message 4
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Subject: | Re: Teflon & Steel Pin Hinge: LAA Mod? |
>>Basically he found that the teflon repair failed in a short time too.<<
Cannot argue with that, but I can at least put my own experience on the
balance: The Teflon repair on my hinges show no signs of any wear 60 hours
after I did the mod (more than the time it took for some of the original
hinges to develop slack).
>>So he reams the hinges to remove the burrs and replaces the pin with close
tolerance welding rod.<<
Sounds very risky to me. If the hinges (not the pins) have some wear, what
is the strength of the remaining material after reaming? Answer: Nobody
knows, probably.
Regardless of the repair method, I assume finding the cause of the wear must
be on top of the "to do" list. In my case, the outer hinge on each aileron
showed noticeable wear, but none of the other hinges. I suspected that a
contributing cause (in addition to maybe not perfectly lined up hinges??)
could have been that there was a fair length of the aileron span outside of
the outer hinge, i.e. unsupported and allowed to flex (noticeable "give" if
bending the aileron tip up or down even with tight hinges) and maybe
vibrating some? When I did the Teflon repair on both the slack hinges and
all the others, I also installed a third hinge at the outer end of each
aileron (also with the Teflon mod). This effectively stopped the "give" in
the aileron.
There is a drawback with the Teflon "repair": It does not remove the slack
developed in a worn hinge, although it may stop or delay further wear.
Therefore, it is best done before any wear has developed.
Note: In Norway, the CAA considers Experimental aircraft as "experimental",
meaning that we are allowed a fair degree of experimenting!
Svein
LN-SKJ
Message 5
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Subject: | Re: Teflon & Steel Pin Hinge: LAA Mod? |
I have seen this third hinge argument on the list before and I was thinking
of installing extra hinges on mine. Does anyone know if this would be an
acceptable mod with the LAA in the UK?
Regards
Rick Sivier
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Sidsel & Svein
Johnsen
Sent: 02 August 2010 16:02
Subject: SV: Europa-List: Re: Teflon & Steel Pin Hinge: LAA Mod?
<sidsel.svein@oslo.online.no>
>>Basically he found that the teflon repair failed in a short time too.<<
Cannot argue with that, but I can at least put my own experience on the
balance: The Teflon repair on my hinges show no signs of any wear 60 hours
after I did the mod (more than the time it took for some of the original
hinges to develop slack).
>>So he reams the hinges to remove the burrs and replaces the pin with close
tolerance welding rod.<<
Sounds very risky to me. If the hinges (not the pins) have some wear, what
is the strength of the remaining material after reaming? Answer: Nobody
knows, probably.
Regardless of the repair method, I assume finding the cause of the wear must
be on top of the "to do" list. In my case, the outer hinge on each aileron
showed noticeable wear, but none of the other hinges. I suspected that a
contributing cause (in addition to maybe not perfectly lined up hinges??)
could have been that there was a fair length of the aileron span outside of
the outer hinge, i.e. unsupported and allowed to flex (noticeable "give" if
bending the aileron tip up or down even with tight hinges) and maybe
vibrating some? When I did the Teflon repair on both the slack hinges and
all the others, I also installed a third hinge at the outer end of each
aileron (also with the Teflon mod). This effectively stopped the "give" in
the aileron.
There is a drawback with the Teflon "repair": It does not remove the slack
developed in a worn hinge, although it may stop or delay further wear.
Therefore, it is best done before any wear has developed.
Note: In Norway, the CAA considers Experimental aircraft as "experimental",
meaning that we are allowed a fair degree of experimenting!
Svein
LN-SKJ
Message 6
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Subject: | Teflon & Steel Pin Hinge: LAA Mod? |
Richard
As you know I keep an eye on what mods people are doing and I have not heard
of anyone putting this mod to the LAA. What Andy has said seems to confirm
this. It has come up in conversations but the opinions I have heard suggest
that it is not a good idea.
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani@ntlworld.com
Message 7
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Subject: | Re: Teflon & Steel Pin Hinge: LAA Mod? |
Ian
I'm guessing you were talking about the hinge pin mod?
Do you know if anyone has submitted the third aileron hinge mod to the LAA or would
this be a non-mod and just subject to inspector sign-off.
--------
Regards
Kelv Weston
Kit 497
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=307235#307235
Message 8
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Hi Ferg,
see page 10-1, 912 operator's manual Jan 2007. Max 5 seconds at negative
0.5g
Keith Hickling,
New Zealand.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Fergus Kyle
Sent: Thursday, 29 July 2010 6:52 a.m.
Subject: Europa-List: Negative "G"
This may not be the place to ask, but experience here might be
better than elsewhere. My question (following the MG specs sheet
regarding neg G) is:
I believe the Rotax restriction on the 900 series engines is NO
Neg G, yet several have remarked on "jinking" the undercarriage to lock
recalcitrant outriggers and similar moves. What is the proper limit? -
is an instantaneous neg G manoeuvre a No-no or is there perhaps some
leeway ( No inverted flight, etc.)?
What thinkest thou sirrah?
Cheers Ferg
Message 9
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Subject: | iPad aviation apps |
At our little Orcas Island Fly In this weekend, graced by an
immaculate and extremely rare Menasco powered Fairchild 22 (for sale
incidentally for $80k USD...a steal), a Waco Travel Air S-6000B
airliner, Jerry Rehn's immaculate Europa XS mono, and numerous
classics & homebuilts, in a conversation with Jerry, he told me about
a series of aviation-related apps for the iPad including a moving map
and other in-flight (as well as pre-flight & flight planning)
functions...sufficient, or potentially sufficient, when used w/ the
iPad w/ internal GPS, to be used for inflight navigation.
I haven't been able to find much on line, so I'm hoping that
Jerry...and certainly any others w/ technical knowledge...would
expound a bit on the subject.
Fred
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