BC12D Cowling Fairings for Screened Plugs.

[Mick W]

Hello folks
I'm changing my old unscreened Bendix Mags , to Slicks , & wondered if anyone can give me a contact for Plug Fairings/Blisters , Aluminium preferred .
Thanks
Mick .

[astjp2]

Re: BC12D Cowling Fairings for Screened Plugs.

Univair, earcoup spark plug farings

[3Dreaming]

Re: BC12D Cowling Fairings for Screened Plugs.

Personally I would sit down and make my own, or better yet have my dad make them for me.

[TimHicks]

Re: BC12D Cowling Fairings for Screened Plugs.

I made my own recently out of aluminum. It was my first attempt to form aluminum. I kind of chronicled my attempts on my registry page in this forum. See link below.

http://vb.taylorcraft.org/showthread.php?10542-N-96872/page5

I'm totally happy with the results. I prefer the Aluminum ones much more than the plastic ones that I had previously.

[M Towsley]

Re: BC12D Cowling Fairings for Screened Plugs.

Get Ercoupe cups for top plugs, shielded for bottom plugs and save your cowl from getting cut up like so many others. Ercoupe cups are described in many threads on here, just use the search box.

[Mick W]

Re: BC12D Cowling Fairings for Screened Plugs.

Thanks all , I'm going for the Cups .
Regards
Mick

[flyguy]

Re: BC12D Cowling Fairings for Screened Plugs.

Here we go again, this stupid software would not let me post then it dumped half of what I had copied just in case. REALLY NEED TO GET THIS FIXED.

As I was saying. The problem with the "cups", that I have, is that the plugs that fit them do not have built in resistors. It is the resistor in the plug that kills the fast rise time of the spark that produces the radio noise/RF signal.

That process (damping resistance) is why automotive ignition systems do not have to use shielded plug wires. The "wires" are resistive, but considered unreliable for aircraft use.

If someone can find some resistive aircraft plugs that will fit/function in the short "cups" I would like to buy a set.


DC

[M Towsley]

Re: BC12D Cowling Fairings for Screened Plugs.

DC,

I have non shielded plugs in my Ercoupe cups. The plug wires are shielded plus I have a magneto switch cover at the rear which I believe is also grounded.

Again, there is a lot of info on the Forum about that. I have no RF interference whatsoever. All of this stuff has been gone over on here many, many times.

[flyguy]

Re: BC12D Cowling Fairings for Screened Plugs.

Marty, thanks. When I switch to the lower plug mag my radio is quiet so I think that points to the problem. I do have one question for you. How do you tighten down your cup "caps" or lids or whatever they are properly called? I have been hesitant to screw them down too far, being concerned with shorting out the plug.
That might be at least part of my problem--lack of really good continuous metalic electrical contact with the cup. They tend to be somewhat loose when they are in position to line up with the cotter pin holes vertically.

Darryl

[M Towsley]

Re: BC12D Cowling Fairings for Screened Plugs.

I just tighten them down with a Dzus tool or screwdriver. Mine do not contact the tops of the plugs. I believe I am using M41 plugs, (?). The slot is not made, (at least mine), to use as a safety method. Mine do not loosen, though I do use a long, small, cotter pin to prevent the caps from becoming lost if they loosen. I cannot remember the AN number of the pin. I used to use safety wire through the holes but that is a PITA to do. The cotter is much faster and serves the same purpose. If I can remember, I will take a picture the next time I am out at the hangar.

I do use the ANL feature on my Icom A6 and do raise the squelch a hair to eliminate any noise I hear. My reception, and transmission, is fantastic utilizing an antenna on the bottom of the boot cowl. I now remember I utilized shielded wire from the mag switch to the mags and ground the braid to the switch cover, (I will try and find a picture of it, I posted it on here years ago). Let me stick my head under the instrument panel and look at the mag switch and will let you know.

[Hank Jarrett]

Re: BC12D Cowling Fairings for Screened Plugs.

Here are some Erocoupe Cup photos. The Cotter Key is easier to do than the safety wire and works just as well.

[Robert Lees]

Re: BC12D Cowling Fairings for Screened Plugs.

I met with the OP today, and showed him my Ercoupe cups (as yet uninstalled) but he appears convinced on going for the ugly cowl bumps.

I also tried to persuade him to keep the Bendix mags, much better IMHO than the cheap-and-cheerful Slicks.

I don't think I managed to change his mind.

Rob

[t-crafter]

Re: BC12D Cowling Fairings for Screened Plugs.

Hank, I sent you a PM. Did you get it yet?
Thanks
Carlton

[astjp2]

Re: BC12D Cowling Fairings for Screened Plugs.

If the bendix are S-20's he is a fool parted with his money. Look at REM37by plugs, they are about a half of an inch shorter. Tim

[Hank Jarrett]

Re: BC12D Cowling Fairings for Screened Plugs.

You should have it now. Got kind of tied up. ;-)
Hank

Hank, I sent you a PM. Did you get it yet?
Thanks
Carlton