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Preferred method for Switch Anti-Rotation?

PostPosted: Fri Sep 29, 2017 12:58 pm
by NWade
Hi All,

As I wrap up my panel construction, I'm wondering about which method to use to ensure my switches don't rotate in the panel over time. Given the thin instrument panel material for the Sonex, I'm not happy about the prospect of drilling extra holes all the way through for anti-rotation tabs/washers.

Has anyone found success just using lock-washers in such a high-vibration environment? Is there another method you used?

Would love to hear about it (and document it on the forums for posterity)!

Thanks,

--Noel

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Fri Sep 29, 2017 1:34 pm
by Bryan Cotton
I like the anti-rotation washers. I do have some switches that I just torqued down good though. Not hard to retighten if needed.

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Fri Sep 29, 2017 3:04 pm
by lutorm
Use rectangular switches?

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Fri Sep 29, 2017 8:24 pm
by kevinh
lutorm wrote:Use rectangular switches?


That's what I did. It was about $30 to have a place on the web make this subpanel for me (including the aluminum, machining, black anodize and painted letters - they even have a free cad app that just makes these panels):

Image

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Sat Sep 30, 2017 9:34 am
by builderflyer
No "on" and "off" markings? My inspector insisted on having them.

Art,,,,,,,,,,,,,,,,,,,,,Sonex taildragger #95,,,,,,,,,,,,,,,,,,,,,,,,Jab 3300 #261

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Sat Sep 30, 2017 10:47 pm
by kevinh
builderflyer wrote:No "on" and "off" markings? My inspector insisted on having them.

Art,,,,,,,,,,,,,,,,,,,,,Sonex taildragger #95,,,,,,,,,,,,,,,,,,,,,,,,Jab 3300 #261


They are on the switches ;-)

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Sun Oct 01, 2017 8:44 am
by builderflyer
Excellent! That is a very "sanitary" looking subpanel you have there. Nice job.

Art

Preferred method for Switch Anti-Rotation?

PostPosted: Mon Oct 02, 2017 11:38 am
by drPete
Nice work. Who ‘on the web’ did it for you?


Sent from my iPhone using Tapatalk Pro

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Tue Oct 03, 2017 10:50 am
by kevinh
drPete wrote:Nice work. Who ‘on the web’ did it for you?


https://www.frontpanelexpress.com/

It is pretty slick - you use their app and it will price it and ship it straight from the app. It showed up a week after I clicked buy. To keep the price low choose a thinish thickness on the aluminum and just have them drill the holes to #40 (then you updrill at home to the final size)

Re: Preferred method for Switch Anti-Rotation?

PostPosted: Wed Oct 04, 2017 7:43 am
by drPete
Very kool. Thanks for the great resource!