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  #11  
Old 09-16-2013, 09:57 PM
12vaitor 12vaitor is offline
 
Join Date: Aug 2012
Location: Panama City, FL
Posts: 132
Default Spar Pin Magnetic Field

I also had some issues getting the reed switches to activate using the dimensions in the Van's drawings. I did some testing to determine the issues with the magnetic field and the masking of the SS handle and found that 0.125" can make a big difference in getting the switch to active. I put together a document that shows the magnetic field required to activate the reed switch. The two lessons learned are extending the aluminum pin by 0.125" increases the field's activation distance and make sure the reed switch is ABOVE the end of the SS portion of the Spar Pin handle.

Check out the pdf link below for a visual of the magnetic field: https://www.dropbox.com/s/l32g1pkx1w...Oct%202012.pdf

John Salak
RV-12 120116
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  #12  
Old 09-20-2013, 04:13 PM
dinowal dinowal is offline
 
Join Date: Dec 2011
Location: TWIN WATERS, Queensland, AUSTRALIA
Posts: 89
Default success

Spar interlock pins now working reliably! I enlarged the hole in the side of the armrest just slightly to 5/32, and made clips to hold the reed switches right up against the underside of the armrest as Joe suggested. Eureka! Added just a little Silicone (RTV) to ensure no movement with vibration. Thanks Joe & everyone for your advice, Cheers, DEAN...
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  #13  
Old 09-21-2013, 09:17 AM
John-G John-G is offline
 
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 685
Default

Dean - Any chance you can post a photo of your reed switch install for us to have a look at?

Joe always has great solutions .. glad to hear his suggestion worked well for you. Think I will try to mount the switch that way from the get go.
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www.dogaviation.com
RV-12 Wings, Empennage, Fuselage, Finishing, Avionics and Powerplant kits all completed
Now Flying!!

Donation paid until September 2021
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  #14  
Old 09-21-2013, 03:41 PM
dinowal dinowal is offline
 
Join Date: Dec 2011
Location: TWIN WATERS, Queensland, AUSTRALIA
Posts: 89
Default

Hi John, I'll give it a try but may fail the task - it's an awkward place to photograph, & I'm not sure my computer skills are up to getting a photo on to this site... In any case, the clip is a simple piece of Al sheet, approx. 1/2 by 1&1/4 inches, with a hole for the screw & a couple of bends to hold the reed switch flat on a surface. Took only 5 mins to do... Cheers, DEAN....
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  #15  
Old 09-21-2013, 05:07 PM
Jamesey Jamesey is offline
 
Join Date: Feb 2008
Location: Hartlepool, England
Posts: 183
Default Shot In The Dark

A while ago (2 years??) I got a letter from a UK RV 12 builder who suggested a 'mechanical' electrical wing connection possibility. I lost the letter (working abroad). I believe the builder ran a hotel/restaurant. If he reads this I would be interested in any results he came up with.
Jim D
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  #16  
Old 09-22-2013, 02:57 AM
dinowal dinowal is offline
 
Join Date: Dec 2011
Location: TWIN WATERS, Queensland, AUSTRALIA
Posts: 89
Default photos

John- G, I have a couple of good shots of my clips, - if someone can educate me on how to upload them I will gladly do so. Otherwise,if you PM me with your email address I can send them that way.... Cheers, DEAN...
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  #17  
Old 09-22-2013, 05:46 PM
rgmwa rgmwa is offline
 
Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
Default

Some instructions on uploading, Dean.

http://www.vansairforce.net/articles...ums/images.htm
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RV-12LR 912ULS
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  #18  
Old 09-23-2013, 12:05 AM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
Default

It's been quite some time since I set the reed switches but I do recall that removing the spring made it easier to find and mark the sweet spot.
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  #19  
Old 09-25-2013, 07:07 PM
dinowal dinowal is offline
 
Join Date: Dec 2011
Location: TWIN WATERS, Queensland, AUSTRALIA
Posts: 89
Default photo

a try at inserting photo[IMG][/IMG]
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  #20  
Old 09-25-2013, 07:13 PM
dinowal dinowal is offline
 
Join Date: Dec 2011
Location: TWIN WATERS, Queensland, AUSTRALIA
Posts: 89
Default More success

Wow, I managed to insert a photo.... maybe I'm not such a computer nerd after all!!?? cheers, DEAN....
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