Today's Message Index:
----------------------
0. 08:07 AM - What's Your Contribution Used For? (Matt Dralle)
1. 01:45 PM - Re: Grounding question (Kent Ogden)
2. 05:37 PM - Intersection Fairings and Oil Cooler Valve (mhealydds)
3. 06:30 PM - Re: Intersection Fairings and Oil Cooler Valve (Phillip Perry)
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| Subject: | What's Your Contribution Used For? |
Dear Listers,
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Message 1
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| Subject: | Re: Grounding question |
I just wanted to get back to say thanks to all for their input on this
issue. I've pondered this a bit and I'm going to do what Bob did and
run a #8 wire for the ground to the panel, and let the airframe be the
starter return path. This seems like a nice compromise between saving a
little weight and having a good reliable ground for the avionics.
Kent
>>> Tcwtech <rnewman@tcwtech.com> 10/19/2017 12:46 PM >>>
I used the same Akzo Noble primer on my RV-10, all skins are primed
including both sides of all lap joints. ( This primer is amazing stuff,
does stink like all heck, but really tough and protective. Weve used
this on the eight airplanes we have built now over more than 20 years
now, and can say it has held up extremely well.)
I did not run a separate #2 wire up to the front. All ground
current for the starter, alternator and engine sensors flows back
through the airframe. I do have a #8 ground wire running from the
battery to a ground bus up under the instrument panel solely for the
avionics.
I have absolutely no electrical issues or noise problems in this
airplane.
Bob Newman
TCW Technologies, LLC
610-928-3420
> On Oct 19, 2017, at 11:58 AM, Tim Olson <Tim@MyRV10.com> wrote:
>
>
> +1. I ran an independent #2 ground.
>
> That said, with the number of rivets in the airframe I'm sure you'll
be fine as long as you ground to something with a lot of rivets in it.
> I just wanted as low a resistance path to my forest of tabs as
> possible.
>
> Tim
>
>
>> On 10/19/2017 10:42 AM, Phillip Perry wrote:
>> Ditto
>> Sent from my iPhone
>>> On Oct 19, 2017, at 10:35 AM, Shannon Hicks <civeng123@gmail.com
<mailto:civeng123@gmail.com>> wrote:
>>> I used a forest of tabs mounted to my firewall with a #2 (I think)
cable run from there all the way back to the battery ground in the
tailcone. I'm not sure if it was overkill, but I have had zero issues
so far.
>>>
>>> I think the plans ground path is through the skin to the battery
tray where you ground the battery.
>>>
>>> http://www.bandc.aero/grounding-supplies-battery-cables.aspx
>>>
>>> Shannon
>>>
>>> On Thu, Oct 19, 2017 at 10:27 AM, Kent Ogden <ogdenk@upstate.edu
<mailto:ogdenk@upstate.edu>> wrote:
>>>
>>> All,
>>>
>>> I have a question/concern regarding a ground return to the
>>> battery. I have primed all my parts and skins with the Akzo
Nobel
>>> 2 part primer, which is awesome stuff though it's a smelly pain
to
>>> work with. All skin overlaps have been primed on both sides of
>>> the overlap, and this stuff is not conductive at all so the
only
>>> electrical path is through the rivets and the small area of the
>>> rivet hole that doesn't always have primer covering it. On the
>>> outside of the plane the rivet heads have contact directly with
>>> the unprimed skin so it's really the inside skin where there is
>>> minimal area in electrical contact.
>>>
>>> I am concerned that using the skin as a ground return to the
>>> battery may not provide an excellent ground path, especially
for
>>> the large currents needed for engine cranking. I would really
>>> rather not have to run another heavy wire to the front of the
>>> airplane for ground, but I will if necessary.
>>>
>>> Has anyone else faced this issue and had a problem (or no
problem)
>>> using the skin as a ground return? Also, where/how have people
>>> connected the battery ground to the tailcone skin, do you use a
>>> piece of brass or copper buss bar riveted to the bottom skin or
>>> something like that?
>>>
>>> Thanks for any suggestions!
>>>
>>> Kent Ogden
>>> #40710 ultra slow-build :)
>>>
>>>
>>>
>
>
List Admin.
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| Subject: | Intersection Fairings and Oil Cooler Valve |
Just finished my first condition inspection and want to do finish some items while
plane open and though I might get some input....
1. I still have yet to install upper main leg intersection fairings - for attachment
to fuse bottom do you all you use the self tapping screws as in plans, rivnuts,
or another clever solution?
2. I am installing an oil cooler valve - how did you all attached to oil mount?
(clamps, screws, etc?)
Thanks
Matt
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=475187#475187
Message 3
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| Subject: | Re: Intersection Fairings and Oil Cooler Valve |
1) Self tapping screws. Will probably change to nut plates at some point if they
strip out or begin working out with vibration.
2) Mine is mounted on top of the oil cooler plenum. Then the scat tube attached
to it. The butterfly valve is secured with LP4-3s.
It does need to be secured otherwise the push cable rotates the valve around instead
of operating the valve.
Sent from my iPhone
> On Nov 17, 2017, at 7:36 PM, mhealydds <mhealydds@gmail.com> wrote:
>
>
> Just finished my first condition inspection and want to do finish some items
while plane open and though I might get some input....
>
> 1. I still have yet to install upper main leg intersection fairings - for attachment
to fuse bottom do you all you use the self tapping screws as in plans,
rivnuts, or another clever solution?
>
> 2. I am installing an oil cooler valve - how did you all attached to oil mount?
(clamps, screws, etc?)
>
> Thanks
> Matt
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=475187#475187
>
>
>
>
>
>
>
>
>
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