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Ground Idea

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Paul Petty

Joined: 11 Jan 2006
Posts: 226
Location: Mississippi

Posted: Fri Apr 06, 2007 12:16 pm Post subject: Ground Idea

Hey guys,



I came up with this idea for a good ground attach point for the ground cable to airframe point. Its a GM side post extention that is made for external amps in cars and I think it will work better than just bolting the cable end to the airframe. It is made out of brass and with dieletric compound should make a nice solid connection. If any want the part number let me know. They are available at any NAPA store. Also there is a "thinner" 3/8" nut for the back side of it that can be found on a GM starter. It leaves the "2 threads" extruded that the DAR's like. Someone may can come up with an AN nut. I just robbed a starter and used the star shaped locking washer.

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_________________
Paul Petty
Kolbra #12
Ms Dixie
912 UL 70" warp

joe

Joined: 24 Mar 2007
Posts: 16
Location: Broken Arrow, Ok

Posted: Sat Apr 07, 2007 4:37 am Post subject: Re: Ground Idea

That is very clean looking, and should be a solid ground.

Joe

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olendorf

Joined: 06 Jul 2006
Posts: 140
Location: Schenectady, NY USA

Posted: Sat Apr 14, 2007 6:51 pm Post subject: Re: Ground Idea

Paul, I think you may have the meaning of dielectric backwards.  I did for a long time then finally looked it up and realized I had been doing the opposite of what I really wanted.   



"A dielectric, or electrical insulator, is a substance that is highly resistant to the flow of an electric current."



That plane is looking NICE!

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_________________
Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
Schenectady, NY
http://sites.google.com/site/kolbfirestar/

Paul Petty

Joined: 11 Jan 2006
Posts: 226
Location: Mississippi

Posted: Mon Apr 16, 2007 5:19 am Post subject: Re: Ground Idea

Scott,



Are you 100% sure about this? If so I have one hell of a mess. All my electrical system appear to work fine and test good. I used it to prevent corosion.



 Dielectric Silicone Compound Stops Electrical Failures. A “MUST” for all electronic and standard ignitions. Meets OEM specifications. Only Dielectric Silicone works on HIGH ENERGY IGNITION SYSTEMS. Prevents mis-readings. Seals out moisture and corrosion. Recommended for sensor connections, computer connections, solenoids, truck pigtails, plugs, ignition modules and coils, marine connections, lighting systems, batteries, and terminals.



This is from the mfg. website



Regards

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Paul Petty
Kolbra #12
Ms Dixie
912 UL 70" warp

olendorf

Joined: 06 Jul 2006
Posts: 140
Location: Schenectady, NY USA

Posted: Mon Apr 16, 2007 5:58 am Post subject: Re: Ground Idea

I found this over on the Matronics AeroElectric list;



"Hi Wayne, 



Here's my understanding: 



Properly designed electrical connectors make gas-tight connections 

between the conductors. This means that as well as squishing all of the 

air out of the interface, closing the connection will also squish out 

any other liquid/grease in the joint, including dielectric grease. 

Applying dielectric grease to a properly designed connector will not 

interfere with the conductive properties of the joint because the grease 

will get squished out of the places where the joint is gas-tigth. 

However, applying dielectric grease may stave off corrosion at the 

margins of the joint. At the margins (edge) of a connection, there may 

exist narrow (microscopic) crevices/voids, which can be the perfect 

environment for corrosion of the materials used to make the connection. 

Regards, 



Matt- "

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Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
Schenectady, NY
http://sites.google.com/site/kolbfirestar/

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